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Reproduction is a fundamental process within ecology as it is essential for the continuation of all species on earth. Environmental factors that influence reproduction, such as the spatial distribution of resources needed for reproduction, can shape the behavioural strategies used by different populations. Brook trout (Salvelinus fontinalis) require groundwater upwellings at spawning sites for successful reproduction. The spatial distribution of this resource can vary from lake to lake. I examined brook trout spatiotemporal distributions in two lakes that differed in the spatial distribution of groundwater flow – clumped (Stringer Lake) versus dispersed (Scott Lake) – using acoustic telemetry data during the peak spawning period. I hypothesized that brook trout in Stringer Lake would have a smaller spatial distribution, greater movement, and lower spawning site occupancy. Conversely, brook trout in Scott Lake would have a greater spatial distribution, smaller movement patterns, and higher spawning site occupancy. The spatiotemporal data in each lake displayed unique relative densities while also showing reproductive behaviour in areas which have yet to be documented. Within each lake brook trout had different movement and observation states and there were different probabilities of occupancy, survival, and emigration in spawning areas. This study describes how the spatiotemporal distribution of resources required for spawning in two different lakes affects the behaviour and distribution of brook trout. This study also provides the necessary methodology to examine how spawning resource distribution affects fish behaviour.

There are several research infrastructures or other data services running in Europe that cover a multitude of marine-related sciences, providing specific datasets coming from observations collected with different methods. These infrastructures constitute a diverse world, each looking at a piece of the big picture, sometimes hindering collaboration and data sharing. Blue-Cloud aims to overcome fragmentation and build a bridge between thematic science clusters - such as marine, climate, food and agriculture sciences - and EOSC, creating a data federation and providing a common access to a so-called thematic EOSC for marine data. By connecting leading marine data management infrastructures with horizontal e-infrastructures, the project aims to maximise the exploitation of data resources available from different sources. The Blue-Cloud framework consists of two major technical components: (1) a Blue-Cloud Data Discovery and Access service, already presented in a previous EOSC in practice story, to serve federated discovery and access to blue data infrastructures, and (2) a Blue-Cloud Virtual Research Environment (VRE) to provide computing platforms and analytical services facilitating the collaboration between researchers, which is detailed hereafter. The Blue-Cloud VRE is powered by the D4Science Infrastructure. [M. Assante et al. (2019) Enacting open science by D4Science. Future Gener. Comput. Syst. 101: 555-563 10.1016/j.future.2019.05.063 ] The full list of EOSC in practice stories is available here

The Marine Biological Reference Collections (CBMR) are located at the Institute of Marine Sciences (ICM-CSIC) in Barcelona, Spain. The CBR are a Unit of Service where around 15000 referenced species are preserved, catalogued and maintained for their study. The most represented marine groups at the CBMR are fish, crustaceans, molluscs and echinoderms, but also other groups are present. The studies based on the CBMR specimens are focused on biodiversity, biogeography, taxonomy (type species), invasive and alien species, and genetic analysis. Several PhD theses have also been carried out in collaboration with the CBMR.The CBMR are a reference point for the marine biodiversity of the Mediterranean Sea, but in their facilities the CBMR also hold specimens from all the oceans (Atlantic, Pacific, Indian, Antarctic and Arctic). The Collections are constantly receiving new specimens and updating. The main sources of specimens are oceanographic surveys and different kind of sampling programs carried out by the research projects run by the ICM-CSIC. However, the CBMR have also received (in the past and currently) different collections donated by naturalists, researchers, other institutions, and particulars. The CBMR were created in 1981, in the earlier history of the ICM-CSIC, by Jaume Rucabado, Domingo Lloris and Concepción Allué. The Collections were later recognized and catalogued by the Spanish Ministry of Culture in 1990. In the last decade, the CBMR initiated a new stage where the information was digitized and the physical preservation of specimens updated to the new rules (such as change from formaldehyde to ethanol). The CBMR are now part of GBIF (Global Biodiversity Information Facility), thus making public and available all data collections and their metadata. We have also incorporated the use of Geographical Information Systems (GIS) to monitor and study the geographical distribution of our specimens and moreover, the CBMR started to act as repository of DNA voucher collections for genetic analyses.As a unit of service of the ICM-CSIC we think that education and outreach of marine science is of crucial importance for the society and for that reason the CBMR take active part in several outreach activities with schools, universities and general public. For more information or details you can visit our webpage (http://cbr.icm.csic.es/en/node) and send us an e-mail (cbr@icm.csic.es). We will be happy to help you.

Momarsat 2022 cruise report: summary of dives and operations, and position of moorings and observation infrastructures and sampling locations

This document summarizes the key aspects of the EU Commission's strategy to harness the potential of offshore renewable energy.

This bundled publication contains data sets on 1) Polyp size and sex: biometric data of polyps from Dendrophyllia ramea, as well as the sex of each analysed polyp; 2) Oocyte per mesentery: number of oocytes per analysed mesentery; 3) Oocytes per polyp: these data have been used to calculate fecundity; 4) Oocyte developmental stages: oocyte sizes and developmental stage are included; 5. Spermatic cysts: spermatic cysts sizes and developmental stage are included. A total of three polyps per each coral colony have been analysed by histological methods and a total of three coral colonies have been analysed for each sampling month: February 2018, May 2017, July 2018 and October 2017. Samples have been collected in the protected area of Punta La Mona (Granada, Alborán Sea, western Mediterranean) between 30 and 37 meters depth by scuba diving.

Three high resolution multicore records have been collected at three sites in the western Mediterranean with a MC400-Multicorer system during the MedSeA cruise (Mediterranean Sea Acidification in a changing climate) on 2 May to 2 June 2013 onboard the R/V Angeles Álvarino. Core MedSeA-S3-c1 was retrieved in the Alboran basin (Lat. 36.0746° N, Long. 04.11040° W) at a water depth of 1137 m, with a core length of 33 cm. Core MedSeA-S23-c1 was recovered at a water depth of 1156 m in the Balearic basin offshore Barcelona (Lat. 41.1121° N, Long. 2.38200° E) with a core length of 43 cm. MedSeA-S7-c2 was collected at the Strait of Sicily (Lat. 37.7080° N, Long. 12.40553° E) at a water depth of 263 m, with a core length of 46.5 cm. All three cores have been analyzed for changes in size normalized weight (SNW) and stable carbon isotopes (δ13C), measured in planktic foraminiferal clacite shells of the two species Globigerina bulloides and Globigerinoides elongatus. Boron (δ11B) isotopes have been measured in tests of Globigerinoides elongatus at the Alboran site, and in Globigerinoides ruber albus at the Strait of Sicily. Complementary data for the Strait of Sicily record has been obtained, including a 210Pb based age depth model, sea surface temperatures (SST), alkenone concentrations and planktic foraminiferal assemblage changes. The Strait of Sicily record (MedSeA-S7-c2) covers around the last 200 a, describing environmental changes throughout the Industrial Era (IE) at high temporal resolution. The Alboran (MedSeA-S3-c1) and Balearic Sea (MedSeA-S23-c1) records spanning the last about 1 ka at lower temporal resolution, displaying oceanographic changes throughout the transition from the pre-industrial era to present, as discussed in (Pallacks et al., 2021; doi:10.1016/j.gloplacha.2021.103549). Data has been collected to investigate the response of marine calcifiers to the combined effects of climate change stressors on decadal to centennial timescales, caused by anthropogenic CO2 emissions.

Results from six firn cores obtained during a 426 km long northern Greenland traverse in 2015 between the NEEM and the EGRIP deep drilling stations situated on the Western and Eastern side of the Greenland ice sheet, respectively. The cores (9 to 14 m long) are analysed for chemical impurities by means of Continuous Flow Analysis (CFA); Insoluble dust, ammonium, calcium, acid, conductivity and peroxide. The data was dated by means of annual layer counting of mainly peroxide supplemented by calcium seasonal cycles and spans 18 to 53 years (±3 yrs) depending on local snow accumulation that decreases from west to east. Insoluble dust, ammonium, and calcium concentrations in the 6 firn cores overlap, and also the seasonal cycles are similar in timing and magnitude across sites, while peroxide (H2O2) and conductivity both have spatial variations. H2O2 is driven by the accumulation pattern and conductivity is likely influenced by sea salt. Data is published as part of Kjær et al. 2022, Climate of the past, https://doi.org/10.5194/cp-2021-99

We present an age model for the 651 m deep Skytrain Ice Rise ice core (79°44.5'S, 78°32.7'W). The top 2000 years have previously been dated using age markers interpolated through annual layer counting. Below this, we align the Skytrain core to the AICC2012 age model using tie points in the ice and air phase, and apply the Paleochrono program to obtain the best fit to the tie points and glaciological constraints. In the gas phase, ties are made using methane and, in critical sections, δ18Oair; in the ice phase ties are through 10Be across the Laschamps Event, and through ice chemistry related to long-range dust transport and deposition. This strategy provides a good outcome to about 108 ka (~605 m). Beyond that there are signs of flow disturbance, with a section of ice probably repeated. Nonetheless values of CH4 and δ18Oair confirm that part of the last interglacial (LIG), from about 117-126 ka (617-628 m), is present and in chronological order. Below this there are clear signs of stratigraphic disturbance, with rapid oscillation of values in both the ice and gas phase at the base of the LIG section. Based on methane values, the warmest part of the LIG and the coldest part of the penultimate glacial are missing from our record. Ice below 631 m appears to be of age >150 ka.

The tropical Angolan upwelling system is a highly productive ecosystem with a distinct seasonal cycle in surface temperature and primary production. The lowest sea surface temperature, strongest cross-shore temperature gradient, and maximum productivity occur in austral winter when seasonally prevailing upwelling favorable winds are weakest. A multi cruise dataset of microstructure profiles collected between 2013 and 2022 in the tropical Angolan upwelling system was used to analyze the importance of mixing for cooling of the mixed layer. The data were collected during six cruises on board of the R/V Meteor. The results show that cooling due to turbulent heat fluxes at the base of the mixed layer is an important cooling term. This turbulent cooling, that is strongest in shallow shelf regions, is capable of explaining the observed negative cross-shore temperature gradient.