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description Publicationkeyboard_double_arrow_right Part of book or chapter of book 2022Publisher:Elsevier BV Asmus, Harald; Kneer, Dominik; Pogoreutz, Claudia; Blankenhorn, Sven; Jompa, Jamaluddin; Nurdin, Nadiarti; Priosambodo, Dody;Abstract Indonesian seagrass communities are among the most diverse compared with those of other tropical or temperate regions. In this chapter, we describe some of the results of our research on seagrass beds in Sulawesi during the German–Indonesian Research Project “Science for the Protection of Indonesian Coastal Ecosystems” (SPICE) from 2004 to 2016. We studied aspects of the distribution and characteristics of these ecosystems within the Spermonde Archipelago, the role of keystone species and eco-engineers, their function as a habitat for fishes, their impact on carbon flow and storage as well as the threat they face due to anthropogenic activities. Our results contributed to these topics either by confirming known data or by originating new ideas on the interactions of seagrasses with animals and physical drivers. The alarming loss of seagrass beds globally is a serious threat for the function of our oceans as carbon sink. To save the seagrass beds, we suggest immediate measures at a regional level for the Spermonde Archipelago. We further recommend detailed research on the role seagrass ecosystems play within the complex interactions between land use and coastal changes. Abstrak Komunitas Lamun Indonesia termasuk salah satu yang paling beragam dibandingkan dengan wilayah tropis dan subtropis lainnya. Pada bab ini, kami menguraikan beberapa hasil penelitian yang dilakukan di padang lamun Sulawesi selama kegiatan riset bersama Jerman-Indonesia bertajuk “Sains untuk Perlindungan Ekosistem Pantai Indonesia” dari 2004 hingga 2016. Kami mengkaji aspek distribusi dan karakteristik dari ekosistem padang lamun yang ada di Kepulauan Spermonde, peran spesies kunci dan rekayasa ekologi, fungsi padang lamun sebagai habitat bagi ikan, dampak padang lamun terhadap aliran karbon dan penyimpanannya, termasuk ancaman yang dihadapi padang lamun akibat aktifitas manusia. Peringatan tentang berkurangnya luasan padang lamun di seluruh dunia adalah ancaman serius terhadap fungsi laut kita sebagai penyimpan karbon. Untuk menyelamatkan padang lamun ini, kami menyarankan untuk secepatnya melakukan penelitian dalam skala regional. Kami juga merekomendasikan dilakukannya riset yang lebih detail terkait peran ekosistem lamun dalam interaksi kompleks antara penggunaan lahan (land use) dan perubahan pantai.
https://doi.org/10.1... arrow_drop_down https://doi.org/10.1016/b978-0...Part of book or chapter of book . 2022 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationPart of book or chapter of book . 2022add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert https://doi.org/10.1... arrow_drop_down https://doi.org/10.1016/b978-0...Part of book or chapter of book . 2022 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationPart of book or chapter of book . 2022add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2010 GermanyPublisher:Elsevier BV Authors: Kaartvedt, Stein;Kaartvedt, Stein;The prototype of Meganyctiphanes norvegica diel vertical migration (DVM) behaviour comprises ascent around dusk, feeding near the surface at night, and descent at dawn, explained as a trade-off between feeding and predator avoidance in an environment where both food and risk of predation is highest near surface. Light is the proximate cue, and daytime distribution is deeper in clear waters and sunny weather and nocturnal distributions deeper in moonlight. However, both internal state and external factors further affect and modify the diel migration pattern. While Meganyctiphanes migrates in synchrony to the surface at sunset, part of the population may descend soon after the ascent with individuals re-entering upper layers throughout the night. This has been explained with hungry individuals being prone to take larger risks and hence stay shallower, while satiated individuals seek shelter at depth. Females migrate closer to the surface than males of equivalent size, possibly due to their greater demand for energy to fuel egg production. Freshly moulted M. norvegica remain at depth throughout the diel cycle. This has been related to the fact that that krill do not feed during moulting, to reduced swimming capacity, and as a mechanism to avoid cannibalism whilst in a vulnerable condition. In some locations large parts of the population remain at depth at night. Such behaviour may incur access to demersal food sources, provide avoidance of predators, or can be a means to avoid horizontal transport to adjacent, unfavourable areas. Environmental gradients can arrest migrations of M. norvegica, yet the effect of physics is not always distinguished from associated biological properties, like subsurface maxima of phytoplankton located at pycnocline boundaries. Deeper nocturnal distribution when predators were abundant has been reported, and krill may adjust their distribution upwards when exposed to deep-living predators. Instantaneous escape to approaching predators is a common component of the anti-predator repertoire of Meganyctiphanes. Occasionally reported schooling behaviour that overrides normal DVM behaviour may serve anti-predation purposes, as well as being related to reproduction. M. norvegica can remain within confined areas, often defined by the bottom topography, even when exposed to strong currents. Behaviourally mediated retention may be accomplished by vertical migration in depth-stratified flows, but evidence for active use of DVM for the purpose of retention is so far circumstantial among M. norvegica. In several instances, large aggregations of krill that repeatedly occur in the same location appear to be accidental consequences of krill vertical migration behaviour interacting with the mean circulation and bottom topography, rather than representing active retention behaviour.
OceanRep arrow_drop_down https://doi.org/10.1016/b978-0...Part of book or chapter of book . 2010 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu34 citations 34 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert OceanRep arrow_drop_down https://doi.org/10.1016/b978-0...Part of book or chapter of book . 2010 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2018Publisher:Springer International Publishing Authors: Anna Krystyna Roik; Maren Ziegler; Christian R. Voolstra;Anna Krystyna Roik; Maren Ziegler; Christian R. Voolstra;Coral reefs in the Red Sea belong to the most diverse and productive reef ecosystems worldwide, although they are exposed to strong seasonal variability, high temperature, and high salinity. These factors are considered stressful for coral reef biota and challenge reef growth in other oceans, but coral reefs in the Red Sea thrive despite these challenges. In the central Red Sea high temperatures, high salinities, and low dissolved oxygen on the one hand reflect conditions that are predicted for ‘future oceans’ under global warming. On the other hand, alkalinity and other carbonate chemistry parameters are considered favourable for coral growth. In coral reefs of the central Red Sea, temperature and salinity follow a seasonal cycle, while chlorophyll and inorganic nutrients mostly vary spatially, and dissolved oxygen and pH fluctuate on the scale of hours to days. Within these strong environmental gradients micro- and macroscopic reef communities are dynamic and demonstrate plasticity and acclimatisation potential. Epilithic biofilm communities of bacteria and algae, crucial for the recruitment of reef-builders, undergo seasonal community shifts that are mainly driven by changes in temperature, salinity, and dissolved oxygen. These variables are predicted to change with the progression of global environmental change and suggest an immediate effect of climate change on the microbial community composition of biofilms. Corals are so-called holobionts and associate with a variety of microbial organisms that fulfill important functions in coral health and productivity. For instance, coral-associated bacterial communities are more specific and less diverse than those of marine biofilms, and in many coral species in the central Red Sea they are dominated by bacteria from the genus Endozoicomonas. Generally, coral microbiomes align with ecological differences between reef sites. They are similar at sites where these corals are abundant and successful. Coral microbiomes reveal a measurable footprint of anthropogenic influence at polluted sites. Coral-associated communities of endosymbiotic dinoflagellates in central Red Sea corals are dominated by Symbiodinium from clade C. Some corals harbour the same specific symbiont with a high physiological plasticity throughout their distribution range, while others maintain a more flexible association with varying symbionts of high physiological specificity over depths, seasons, or reef locations. The coral-Symbiodinium endosymbiosis drives calcification of the coral skeleton, which is a key process that provides maintenance and formation of the reef framework. Calcification rates and reef growth are not higher than in other coral reef regions, despite the beneficial carbonate chemistry in the central Red Sea. This may be related to the comparatively high temperatures, as indicated by reduced summer calcification and long-term slowing of growth rates that correlate with ocean warming trends. Indeed, thermal limits of abundant coral species in the central Red Sea may have been exceeded, as evidenced by repeated mass bleaching events during previous years. Recent comprehensive baseline data from central Red Sea reefs allow for insight into coral reef functioning and for quantification of the impacts of environmental change in the region.
https://doi.org/10.1... arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2018 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert https://doi.org/10.1... arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2018 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2018Publisher:Elsevier BV Mengjie Yu; Matt P. Ashworth; Nahid H. Hajrah; Mohammad A. Khiyami; Mumdooh J. Sabir; Alawiah M. Alhebshi; Abdulrahman L. Al-Malki; Jamal S. M. Sabir; Edward C. Theriot; Robert K. Jansen;Abstract Diatoms are a monophyletic group of eukaryotic, single-celled heterokont algae. Despite years of phylogenetic research, relationships among major groups of diatoms remain uncertain. Here we assess diatom phylogenetic relationships using the plastid genome (plastome). The 22 previously published diatom plastomes showed variable genome size, gene content and extensive rearrangement. We report another 18 diatom plastome sequences ranging in size from 119,120 to 201,816 bp. Plagiogramma staurophorum had the largest plastome sequenced so far due to large inverted repeats and a 2971 bp group II intron insertion in petD. The previously reported loss of psaE, psaI and psaM genes in Rhizosolenia imbricata also occurred in the closely related species Rhizosolenia fallax. In the largest genome-scale phylogeny yet published for diatoms based on 103 shared plastid-coding genes from 40 diatoms and Triparma laevis as the outgroup, Leptocylindrus was recovered as sister to the remaining diatoms and the clade of Attheya plus Biddulphia was recovered as sister to pennate diatoms, strongly rejecting monophyly of two of the three proposed classes of diatoms. Our study also revealed extensive gene loss and a strong positive correlation between sequence divergence and gene order change in diatom plastomes.
https://doi.org/10.1... arrow_drop_down https://doi.org/10.1016/bs.abr...Part of book or chapter of book . 2018 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/bs.abr.2017.11.009&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu36 citations 36 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert https://doi.org/10.1... arrow_drop_down https://doi.org/10.1016/bs.abr...Part of book or chapter of book . 2018 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/bs.abr.2017.11.009&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2015Publisher:Springer Berlin Heidelberg Authors: Mark Schmidt; Radwan Al-Farawati; Reiner Botz;Mark Schmidt; Radwan Al-Farawati; Reiner Botz;The major geochemical characteristics of Red Sea brine are summarized for 11 brine-filled deeps located along the central graben axis between 19°N and 27°N. The major element composition of the different brine pools is mainly controlled by variable mixing situations of halite-saturated solution (evaporite dissolution) with Red Sea deep water. The brine chemistry is also influenced by hydrothermal water/rock interaction, whereas magmatic and sedimentary rock reactions can be distinguished by boron, lithium, and magnesium/calcium chemistry. Moreover, hydrocarbon chemistry (concentrations and δ13C data) of brine indicates variable injection of light hydrocarbons from organic source rocks and strong secondary (bacterial or thermogenic) degradation processes. A simple statistical cluster analysis approach was selected to look for similarities in brine chemistry and to classify the various brine pools, as the measured chemical brine compositions show remarkably strong concentration variations for some elements. The cluster analysis indicates two main classes of brine. Type I brine chemistry (Oceanographer and Kebrit Deeps) is controlled by evaporite dissolution and contributions from sediment alteration. The Type II brine (Suakin, Port Sudan, Erba, Albatross, Discovery, Atlantis II, Nereus, Shaban, and Conrad Deeps) is influenced by variable contributions from volcanic/magmatic rock alteration. The chemical brine classification can be correlated with the sedimentary and tectonic setting of the related depressions. Type I brine-filled deeps are located slightly off-axis from the central Red Sea graben. A typical “collapse structure formation” which has been defined for the Kebrit Deep by evaluating seismic and geomorphological data probably corresponds to our Type I brine. Type II brine located in depressions in the northern Red Sea (i.e., Conrad and Shaban Deeps) could be correlated to “volcanic intrusion-/extrusion-related” deep formation. The chemical indications for hydrothermal influence on Conrad and Shaban Deep brine can be related to brines from the multi-deeps region in the central Red Sea, where volcanic/magmatic fluid/rock interaction is most obvious. The strongest hydrothermal influence is observed in Atlantis II brine (central multi-deeps region), which is also the hottest Red Sea brine body in 2011 (~68.2 °C).
https://doi.org/10.1... arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2015 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu25 citations 25 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert https://doi.org/10.1... arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2015 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2021 GermanyPublisher:Springer International Publishing Oscar Serrano; Ariane Arias-Ortiz; Carlos M. Duarte; Gary A. Kendrick; Paul S. Lavery;Seagrass meadows deliver important ecosystem services such as nutrient cycling, enhanced biodiversity, and contribution to climate change mitigation and adaption through carbon sequestration and coastal protection. Seagrasses, however, are facing the impacts of ocean warming and marine heatwaves, which are altering their ecological structure and function. Shifts in species composition, mass mortality events, and loss of ecosystem complexity after sudden extreme climate events are increasingly common, weakening the ecosystem services they provide. In the west coast of Australia, Shark Bay holds between 0.7 and 2.4% of global seagrass extent (>4300 km2), but in the austral summer of 2010/2011, the Ningaloo El Niño marine heatwave resulted in the collapse of ~1300 km2 of seagrass ecosystem extent. The loss of the seagrass canopy resulted in the erosion and the likely remineralization of ancient carbon stocks into 2–4 Tg CO2-eq over 6 years following seagrass loss, increasing emissions from land-use change in Australia by 4–8% per annum. Seagrass collapse at Shark Bay also impacted marine food webs, including dugongs, dolphins, cormorants, fish communities, and invertebrates. With increasing recurrence and intensity of marine heatwaves, seagrass resilience is being compromised, underlining the need to implement conservation strategies. Such strategies must precede irreversible climate change-driven tipping points in ecosystem functioning and collapse and result from synchronized efforts involving science, policy, and stakeholders. Management should aim to maintain or enhance the resilience of seagrasses, and using propagation material from heatwave-resistant meadows to restore impacted regions arises as a challenging but promising solution against climate change threats. Although scientific evidence points to severe impacts of extreme climate events on seagrass ecosystems, the occurrence of seagrass assemblages across the planet and the capacity of humans to modify the environment sheds some light on the capability of seagrasses to adapt to changing ecological niches.
OceanRep arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2021 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu12 citations 12 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert OceanRep arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2021 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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description Publicationkeyboard_double_arrow_right Part of book or chapter of book 2022Publisher:Elsevier BV Asmus, Harald; Kneer, Dominik; Pogoreutz, Claudia; Blankenhorn, Sven; Jompa, Jamaluddin; Nurdin, Nadiarti; Priosambodo, Dody;Abstract Indonesian seagrass communities are among the most diverse compared with those of other tropical or temperate regions. In this chapter, we describe some of the results of our research on seagrass beds in Sulawesi during the German–Indonesian Research Project “Science for the Protection of Indonesian Coastal Ecosystems” (SPICE) from 2004 to 2016. We studied aspects of the distribution and characteristics of these ecosystems within the Spermonde Archipelago, the role of keystone species and eco-engineers, their function as a habitat for fishes, their impact on carbon flow and storage as well as the threat they face due to anthropogenic activities. Our results contributed to these topics either by confirming known data or by originating new ideas on the interactions of seagrasses with animals and physical drivers. The alarming loss of seagrass beds globally is a serious threat for the function of our oceans as carbon sink. To save the seagrass beds, we suggest immediate measures at a regional level for the Spermonde Archipelago. We further recommend detailed research on the role seagrass ecosystems play within the complex interactions between land use and coastal changes. Abstrak Komunitas Lamun Indonesia termasuk salah satu yang paling beragam dibandingkan dengan wilayah tropis dan subtropis lainnya. Pada bab ini, kami menguraikan beberapa hasil penelitian yang dilakukan di padang lamun Sulawesi selama kegiatan riset bersama Jerman-Indonesia bertajuk “Sains untuk Perlindungan Ekosistem Pantai Indonesia” dari 2004 hingga 2016. Kami mengkaji aspek distribusi dan karakteristik dari ekosistem padang lamun yang ada di Kepulauan Spermonde, peran spesies kunci dan rekayasa ekologi, fungsi padang lamun sebagai habitat bagi ikan, dampak padang lamun terhadap aliran karbon dan penyimpanannya, termasuk ancaman yang dihadapi padang lamun akibat aktifitas manusia. Peringatan tentang berkurangnya luasan padang lamun di seluruh dunia adalah ancaman serius terhadap fungsi laut kita sebagai penyimpan karbon. Untuk menyelamatkan padang lamun ini, kami menyarankan untuk secepatnya melakukan penelitian dalam skala regional. Kami juga merekomendasikan dilakukannya riset yang lebih detail terkait peran ekosistem lamun dalam interaksi kompleks antara penggunaan lahan (land use) dan perubahan pantai.
https://doi.org/10.1... arrow_drop_down https://doi.org/10.1016/b978-0...Part of book or chapter of book . 2022 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationPart of book or chapter of book . 2022add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert https://doi.org/10.1... arrow_drop_down https://doi.org/10.1016/b978-0...Part of book or chapter of book . 2022 . Peer-reviewedLicense: Elsevier TDMData sources: CrossrefMémoires en Sciences de l'Information et de la CommunicationPart of book or chapter of book . 2022add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2010 GermanyPublisher:Elsevier BV Authors: Kaartvedt, Stein;Kaartvedt, Stein;The prototype of Meganyctiphanes norvegica diel vertical migration (DVM) behaviour comprises ascent around dusk, feeding near the surface at night, and descent at dawn, explained as a trade-off between feeding and predator avoidance in an environment where both food and risk of predation is highest near surface. Light is the proximate cue, and daytime distribution is deeper in clear waters and sunny weather and nocturnal distributions deeper in moonlight. However, both internal state and external factors further affect and modify the diel migration pattern. While Meganyctiphanes migrates in synchrony to the surface at sunset, part of the population may descend soon after the ascent with individuals re-entering upper layers throughout the night. This has been explained with hungry individuals being prone to take larger risks and hence stay shallower, while satiated individuals seek shelter at depth. Females migrate closer to the surface than males of equivalent size, possibly due to their greater demand for energy to fuel egg production. Freshly moulted M. norvegica remain at depth throughout the diel cycle. This has been related to the fact that that krill do not feed during moulting, to reduced swimming capacity, and as a mechanism to avoid cannibalism whilst in a vulnerable condition. In some locations large parts of the population remain at depth at night. Such behaviour may incur access to demersal food sources, provide avoidance of predators, or can be a means to avoid horizontal transport to adjacent, unfavourable areas. Environmental gradients can arrest migrations of M. norvegica, yet the effect of physics is not always distinguished from associated biological properties, like subsurface maxima of phytoplankton located at pycnocline boundaries. Deeper nocturnal distribution when predators were abundant has been reported, and krill may adjust their distribution upwards when exposed to deep-living predators. Instantaneous escape to approaching predators is a common component of the anti-predator repertoire of Meganyctiphanes. Occasionally reported schooling behaviour that overrides normal DVM behaviour may serve anti-predation purposes, as well as being related to reproduction. M. norvegica can remain within confined areas, often defined by the bottom topography, even when exposed to strong currents. Behaviourally mediated retention may be accomplished by vertical migration in depth-stratified flows, but evidence for active use of DVM for the purpose of retention is so far circumstantial among M. norvegica. In several instances, large aggregations of krill that repeatedly occur in the same location appear to be accidental consequences of krill vertical migration behaviour interacting with the mean circulation and bottom topography, rather than representing active retention behaviour.
OceanRep arrow_drop_down https://doi.org/10.1016/b978-0...Part of book or chapter of book . 2010 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/b978-0-12-381308-4.00009-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu34 citations 34 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert OceanRep arrow_drop_down https://doi.org/10.1016/b978-0...Part of book or chapter of book . 2010 . Peer-reviewedData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2018Publisher:Springer International Publishing Authors: Anna Krystyna Roik; Maren Ziegler; Christian R. Voolstra;Anna Krystyna Roik; Maren Ziegler; Christian R. Voolstra;Coral reefs in the Red Sea belong to the most diverse and productive reef ecosystems worldwide, although they are exposed to strong seasonal variability, high temperature, and high salinity. These factors are considered stressful for coral reef biota and challenge reef growth in other oceans, but coral reefs in the Red Sea thrive despite these challenges. In the central Red Sea high temperatures, high salinities, and low dissolved oxygen on the one hand reflect conditions that are predicted for ‘future oceans’ under global warming. On the other hand, alkalinity and other carbonate chemistry parameters are considered favourable for coral growth. In coral reefs of the central Red Sea, temperature and salinity follow a seasonal cycle, while chlorophyll and inorganic nutrients mostly vary spatially, and dissolved oxygen and pH fluctuate on the scale of hours to days. Within these strong environmental gradients micro- and macroscopic reef communities are dynamic and demonstrate plasticity and acclimatisation potential. Epilithic biofilm communities of bacteria and algae, crucial for the recruitment of reef-builders, undergo seasonal community shifts that are mainly driven by changes in temperature, salinity, and dissolved oxygen. These variables are predicted to change with the progression of global environmental change and suggest an immediate effect of climate change on the microbial community composition of biofilms. Corals are so-called holobionts and associate with a variety of microbial organisms that fulfill important functions in coral health and productivity. For instance, coral-associated bacterial communities are more specific and less diverse than those of marine biofilms, and in many coral species in the central Red Sea they are dominated by bacteria from the genus Endozoicomonas. Generally, coral microbiomes align with ecological differences between reef sites. They are similar at sites where these corals are abundant and successful. Coral microbiomes reveal a measurable footprint of anthropogenic influence at polluted sites. Coral-associated communities of endosymbiotic dinoflagellates in central Red Sea corals are dominated by Symbiodinium from clade C. Some corals harbour the same specific symbiont with a high physiological plasticity throughout their distribution range, while others maintain a more flexible association with varying symbionts of high physiological specificity over depths, seasons, or reef locations. The coral-Symbiodinium endosymbiosis drives calcification of the coral skeleton, which is a key process that provides maintenance and formation of the reef framework. Calcification rates and reef growth are not higher than in other coral reef regions, despite the beneficial carbonate chemistry in the central Red Sea. This may be related to the comparatively high temperatures, as indicated by reduced summer calcification and long-term slowing of growth rates that correlate with ocean warming trends. Indeed, thermal limits of abundant coral species in the central Red Sea may have been exceeded, as evidenced by repeated mass bleaching events during previous years. Recent comprehensive baseline data from central Red Sea reefs allow for insight into coral reef functioning and for quantification of the impacts of environmental change in the region.
https://doi.org/10.1... arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2018 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-99417-8_22&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu1 citations 1 popularity Average influence Average impulse Average Powered by BIP!more_vert https://doi.org/10.1... arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2018 . Peer-reviewedLicense: Springer TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-319-99417-8_22&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2018Publisher:Elsevier BV Mengjie Yu; Matt P. Ashworth; Nahid H. Hajrah; Mohammad A. Khiyami; Mumdooh J. Sabir; Alawiah M. Alhebshi; Abdulrahman L. Al-Malki; Jamal S. M. Sabir; Edward C. Theriot; Robert K. Jansen;Abstract Diatoms are a monophyletic group of eukaryotic, single-celled heterokont algae. Despite years of phylogenetic research, relationships among major groups of diatoms remain uncertain. Here we assess diatom phylogenetic relationships using the plastid genome (plastome). The 22 previously published diatom plastomes showed variable genome size, gene content and extensive rearrangement. We report another 18 diatom plastome sequences ranging in size from 119,120 to 201,816 bp. Plagiogramma staurophorum had the largest plastome sequenced so far due to large inverted repeats and a 2971 bp group II intron insertion in petD. The previously reported loss of psaE, psaI and psaM genes in Rhizosolenia imbricata also occurred in the closely related species Rhizosolenia fallax. In the largest genome-scale phylogeny yet published for diatoms based on 103 shared plastid-coding genes from 40 diatoms and Triparma laevis as the outgroup, Leptocylindrus was recovered as sister to the remaining diatoms and the clade of Attheya plus Biddulphia was recovered as sister to pennate diatoms, strongly rejecting monophyly of two of the three proposed classes of diatoms. Our study also revealed extensive gene loss and a strong positive correlation between sequence divergence and gene order change in diatom plastomes.
https://doi.org/10.1... arrow_drop_down https://doi.org/10.1016/bs.abr...Part of book or chapter of book . 2018 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/bs.abr.2017.11.009&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu36 citations 36 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert https://doi.org/10.1... arrow_drop_down https://doi.org/10.1016/bs.abr...Part of book or chapter of book . 2018 . Peer-reviewedLicense: Elsevier TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1016/bs.abr.2017.11.009&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2015Publisher:Springer Berlin Heidelberg Authors: Mark Schmidt; Radwan Al-Farawati; Reiner Botz;Mark Schmidt; Radwan Al-Farawati; Reiner Botz;The major geochemical characteristics of Red Sea brine are summarized for 11 brine-filled deeps located along the central graben axis between 19°N and 27°N. The major element composition of the different brine pools is mainly controlled by variable mixing situations of halite-saturated solution (evaporite dissolution) with Red Sea deep water. The brine chemistry is also influenced by hydrothermal water/rock interaction, whereas magmatic and sedimentary rock reactions can be distinguished by boron, lithium, and magnesium/calcium chemistry. Moreover, hydrocarbon chemistry (concentrations and δ13C data) of brine indicates variable injection of light hydrocarbons from organic source rocks and strong secondary (bacterial or thermogenic) degradation processes. A simple statistical cluster analysis approach was selected to look for similarities in brine chemistry and to classify the various brine pools, as the measured chemical brine compositions show remarkably strong concentration variations for some elements. The cluster analysis indicates two main classes of brine. Type I brine chemistry (Oceanographer and Kebrit Deeps) is controlled by evaporite dissolution and contributions from sediment alteration. The Type II brine (Suakin, Port Sudan, Erba, Albatross, Discovery, Atlantis II, Nereus, Shaban, and Conrad Deeps) is influenced by variable contributions from volcanic/magmatic rock alteration. The chemical brine classification can be correlated with the sedimentary and tectonic setting of the related depressions. Type I brine-filled deeps are located slightly off-axis from the central Red Sea graben. A typical “collapse structure formation” which has been defined for the Kebrit Deep by evaluating seismic and geomorphological data probably corresponds to our Type I brine. Type II brine located in depressions in the northern Red Sea (i.e., Conrad and Shaban Deeps) could be correlated to “volcanic intrusion-/extrusion-related” deep formation. The chemical indications for hydrothermal influence on Conrad and Shaban Deep brine can be related to brines from the multi-deeps region in the central Red Sea, where volcanic/magmatic fluid/rock interaction is most obvious. The strongest hydrothermal influence is observed in Atlantis II brine (central multi-deeps region), which is also the hottest Red Sea brine body in 2011 (~68.2 °C).
https://doi.org/10.1... arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2015 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-662-45201-1_13&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu25 citations 25 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert https://doi.org/10.1... arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2015 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-662-45201-1_13&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Part of book or chapter of book 2021 GermanyPublisher:Springer International Publishing Oscar Serrano; Ariane Arias-Ortiz; Carlos M. Duarte; Gary A. Kendrick; Paul S. Lavery;Seagrass meadows deliver important ecosystem services such as nutrient cycling, enhanced biodiversity, and contribution to climate change mitigation and adaption through carbon sequestration and coastal protection. Seagrasses, however, are facing the impacts of ocean warming and marine heatwaves, which are altering their ecological structure and function. Shifts in species composition, mass mortality events, and loss of ecosystem complexity after sudden extreme climate events are increasingly common, weakening the ecosystem services they provide. In the west coast of Australia, Shark Bay holds between 0.7 and 2.4% of global seagrass extent (>4300 km2), but in the austral summer of 2010/2011, the Ningaloo El Niño marine heatwave resulted in the collapse of ~1300 km2 of seagrass ecosystem extent. The loss of the seagrass canopy resulted in the erosion and the likely remineralization of ancient carbon stocks into 2–4 Tg CO2-eq over 6 years following seagrass loss, increasing emissions from land-use change in Australia by 4–8% per annum. Seagrass collapse at Shark Bay also impacted marine food webs, including dugongs, dolphins, cormorants, fish communities, and invertebrates. With increasing recurrence and intensity of marine heatwaves, seagrass resilience is being compromised, underlining the need to implement conservation strategies. Such strategies must precede irreversible climate change-driven tipping points in ecosystem functioning and collapse and result from synchronized efforts involving science, policy, and stakeholders. Management should aim to maintain or enhance the resilience of seagrasses, and using propagation material from heatwave-resistant meadows to restore impacted regions arises as a challenging but promising solution against climate change threats. Although scientific evidence points to severe impacts of extreme climate events on seagrass ecosystems, the occurrence of seagrass assemblages across the planet and the capacity of humans to modify the environment sheds some light on the capability of seagrasses to adapt to changing ecological niches.
OceanRep arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2021 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-030-71330-0_13&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu12 citations 12 popularity Top 10% influence Average impulse Top 10% Powered by BIP!more_vert OceanRep arrow_drop_down https://doi.org/10.1007/978-3-...Part of book or chapter of book . 2021 . Peer-reviewedLicense: Springer Nature TDMData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/978-3-030-71330-0_13&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu