Affiliation:
1. School of Marine Sciences Nanjing University of Information Science and Technology Nanjing China
2. The Key Laboratory of Space Ocean Remote Sensing and Application Ministry of Natural Resources Beijing China
3. State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute Chinese Academy of Sciences Beijing China
4. National Satellite Ocean Application Service Beijing China
Abstract
AbstractMarine phytoplankton fuel the oceanic biotic chain, determine the carbon sequestration levels, and are crucial for the global carbon cycle and climate change. In the present study, we show a near‐two‐decadal (2002–2022) spatiotemporal distribution of global phytoplankton abundance, proxy as dominant phytoplankton taxonomic groups (PTGs), with a newly developed remote sensing model. Globally, six chief PTGs, namely chlorophytes (~26%), diatoms (~24%), haptophytes (~15%), cryptophytes (~10%), cyanobacteria (~8%), and dinoflagellates (~3%), explain most of the variation (~86%) in phytoplankton assemblages. Spatially, diatoms generally dominate high latitudes, marginal seas, and coastal upwelling zones, whereas chlorophytes and haptophytes control the open oceans. Satellite observations reveal a gentle multi‐annual trend of the PTGs in the major oceans, indicative of roughly “unchanged” conditions on the total biomass or compositions of the phytoplankton community. Jointly, “changed” status applies to a short‐term (seasonal) timescale: (1) Fluctuations of PTGs exhibit different amplitudes among different subregions, together with a general rule‐more intense vibration in the Northern Hemisphere and polar oceans than other zones; (2) diatoms and haptophytes vary more dramatically than other PTGs in a global‐scale scope. These findings provide a clear picture of the global phytoplankton community composition and can improve our understanding of their state and further analysis of marine biological processes.
Funder
National Natural Science Foundation of China
National Basic Research Program of China
Natural Science Foundation of Jiangsu Province
Subject
General Environmental Science,Ecology,Environmental Chemistry,Global and Planetary Change
Cited by
1 articles.
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