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- Title
Sedimentary Records of Phytoplankton Communities in Sanmen Bay in China: The Impacts of ENSO Events over the Past Two Centuries.
- Authors
Chen, Lihong; Xu, Zengchao; Zeng, Jiangning; Zhu, Genhai; Liu, Xin; Huang, Bangqin
- Abstract
Phytoplankton communities, showing significant spatiotemporal variation within bay areas, play an important role in the structure and function of nearshore marine ecosystems. However, the absence of long-term high-resolution datasets has hindered our understanding of the effect of ENSO-driven environmental changes on phytoplankton communities in coastal ecosystems. Herein, by performing biomarker inversion analyses on two centuries' worth of sedimentary organisms in the Sanmen Bay area, we observed a marked El Niño/La Niña-related succession; specifically, that El Niño-induced warming had increased the biomass of phytoplankton by 57.89%, while also increasing the proportion of diatoms by 76.40%. In contrast, La Niña years exhibited a decrease in the biomass of phytoplankton by 54.23%. Further, over three decades of observational data from the Sanmen Bay suggest that La Niña years can promote occasional blooms through monsoonal mixing and land-based inputs. Consequently, the nearshore marine ecosystem of the bay area, being subject to intense anthropogenic activity and land–sea interactions, can be said to be influenced by global-scale ocean–atmosphere processes. Going forward, the connection between short-term extreme events and long-term changes in the nearshore marine ecosystem should receive greater attention.
- Subjects
CHINA; LA Nina; SOUTHERN oscillation; PHYTOPLANKTON; EL Nino; MARINE ecology; BIOMASS; DIATOMS
- Publication
Water (20734441), 2023, Vol 15, Issue 7, p1255
- ISSN
2073-4441
- Publication type
Article
- DOI
10.3390/w15071255