Haplo-diplontic life cycle expands coccolithophore niche
Haplo-diplontic life cycle expands coccolithophore niche
Coccolithophores are globally important marine calcifying phytoplankton that utilize a haplo-diplontic life cycle. The haplo-diplontic life cycle allows coccolithophores to divide in both life cycle phases and potentially expands coccolithophore niche volume. Research has, however, to date largely overlooked the life cycle of coccolithophores and has instead focused on the diploid life cycle phase of coccolithophores. Through the synthesis and analysis of global scanning electron microscopy (SEM) coccolithophore abundance data (n=2534), we find that calcified haploid coccolithophores generally constitute a minor component of the total coccolithophore abundance (≈ 2 %–15 % depending on season). However, using case studies in the Atlantic Ocean and Mediterranean Sea, we show that, depending on environmental conditions, calcifying haploid coccolithophores can be significant contributors to the coccolithophore standing stock (up to ≈30 %). Furthermore, using hypervolumes to quantify the niche of coccolithophores, we illustrate that the haploid and diploid life cycle phases inhabit contrasting niches and that on average this allows coccolithophores to expand their niche by ≈18.8 %, with a range of 3 %–76 % for individual species. Our results highlight that future coccolithophore research should consider both life cycle stages, as omission of the haploid life cycle phase in current research limits our understanding of coccolithophore ecology. Our results furthermore suggest a different response to nutrient limitation and stratification, which may be of relevance for further climate scenarios. Our compilation highlights the spatial and temporal sparsity of SEM measurements and the need for new molecular techniques to identify uncalcified haploid coccolithophores. Our work also emphasizes the need for further work on the carbonate chemistry niche of the coccolithophore life cycle.
- Department of Earth and Environmental Sciences (DISAT) - University of Milano-Bicocca Italy
- CoNISMa Italy
- University of Bristol (UoB) United Kingdom
- Marine Biological Association of the United Kingdom United Kingdom
- University of Milano-Bicocca Italy
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Andruleit, H.: Living coccolithophores recorded during the onset of upwelling conditions off oman in the western arabian sea, J. Nannoplankton Res., 27, 1-14, 2005. [OpenAIRE]
Andruleit, H.: Status of the Java upwelling area (Indian Ocean) during the oligotrophic northern hemisphere winter monsoon season as revealed by coccolithophores, Mar. Micropaleontol., 64, 36- 51, https://doi.org/10.1016/j.marmicro.2007.02.001, 2007. [OpenAIRE]
Andruleit, H., Stäger, S., Rogalla, U., and Cˇepek, P.: Living coccolithophores in the northern Arabian Sea: Ecological tolerances and environmental control, Mar. Micropaleontol., 49, 157-181, https://doi.org/10.1016/S0377-8398(03)00049-5, 2003.
Aubry, M. P.: A sea of Lilliputians, Palaeogeogr. Palaeocl., 284, 88- 113, https://doi.org/10.1016/j.palaeo.2009.08.020, 2009.
Balch, W.: Re-evaluation of the physiological ecology of coccolithophores, in: Coccolithophores: from molecular processes to global impact, Springer, Berlin, https://doi.org/10.1007/978-3- 662-06278-4, 165-190, 2004.
Baumann, K., Boeckel, B., and Cˇ epek, M.: Spatial distribution of living coccolithophores along an east- west transect in the subtropical South Atlantic, J. Nannoplankton Res., 30, 9-21, 2008.
Behrenfeld, M. J., O'Malley, R. T., Siegel, D. A., McClain, C. R., Sarmiento, J. L., Feldman, G. C., Milligan, A. J., Falkowski, P. G., Letelier, R. M., and Boss, E. S.: Climate-driven trends in contemporary ocean productivity, Nature, 444, 752-755, https://doi.org/10.1038/nature05317, 2006. [OpenAIRE]
Blonder, B.: Hypervolume concepts in niche- and trait-based ecology, Ecography, 41, 1441-1455, https://doi.org/10.1111/ecog.03187, 2018.
Blonder, B. and Harris, D. J.: hypervolume: High Dimensional Geometry and Set Operations Using Kernel Density Estimation, Support Vector Machines, and Convex Hulls, available at: https://cran.r-project.org/package=hypervolume (last access: August 2020), 2018.
Blonder, B., Lamanna, C., Violle, C., and Enquist, B. J.: The ndimensional hypervolume, Global Ecol. Biogeogr., 23, 595-609, https://doi.org/10.1111/geb.12146, 2014.
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Popularity provided by BIP!- UK Research and Innovation (UKRI)
- NE/N011708/1
- NERC
- Ministry of Science, Education and Sports of the Republic of Croatia (MSES) (MZOS)
- 098-0982705-2731
- UK Research and Innovation (UKRI)
- NE/L002434/1
- NERC
- Department of Earth and Environmental Sciences (DISAT) - University of Milano-Bicocca Italy
- CoNISMa Italy
- University of Bristol (UoB) United Kingdom
- Marine Biological Association of the United Kingdom United Kingdom
- University of Milano-Bicocca Italy
- Heriot Watt University United Kingdom
- University of Milano-Bicocca Italy
- Marine Biological Association (MBA), The Laboratory, Plymouth, UK United Kingdom
- University of Southampton United Kingdom
- UNIVERSITY OF SOUTHAMPTON United Kingdom
- Ruđer Bošković Institute Croatia
- University of Bristol United Kingdom
- Heriot-Watt University United Kingdom
- National Institute of Oceanography and Experimental Geophysics Italy
Coccolithophores are globally important marine calcifying phytoplankton that utilize a haplo-diplontic life cycle. The haplo-diplontic life cycle allows coccolithophores to divide in both life cycle phases and potentially expands coccolithophore niche volume. Research has, however, to date largely overlooked the life cycle of coccolithophores and has instead focused on the diploid life cycle phase of coccolithophores. Through the synthesis and analysis of global scanning electron microscopy (SEM) coccolithophore abundance data (n=2534), we find that calcified haploid coccolithophores generally constitute a minor component of the total coccolithophore abundance (≈ 2 %–15 % depending on season). However, using case studies in the Atlantic Ocean and Mediterranean Sea, we show that, depending on environmental conditions, calcifying haploid coccolithophores can be significant contributors to the coccolithophore standing stock (up to ≈30 %). Furthermore, using hypervolumes to quantify the niche of coccolithophores, we illustrate that the haploid and diploid life cycle phases inhabit contrasting niches and that on average this allows coccolithophores to expand their niche by ≈18.8 %, with a range of 3 %–76 % for individual species. Our results highlight that future coccolithophore research should consider both life cycle stages, as omission of the haploid life cycle phase in current research limits our understanding of coccolithophore ecology. Our results furthermore suggest a different response to nutrient limitation and stratification, which may be of relevance for further climate scenarios. Our compilation highlights the spatial and temporal sparsity of SEM measurements and the need for new molecular techniques to identify uncalcified haploid coccolithophores. Our work also emphasizes the need for further work on the carbonate chemistry niche of the coccolithophore life cycle.