Unveiling differential thermal sensitivities in marine phytoplankton within the China Seas

Author:

Wang Changyun1,Cai Shujie1,Tong Zhuyin1ORCID,Chen Jixin1,Lin Lizhen1,Xiao Wupeng1ORCID,Liu Xin1ORCID,Huang Bangqin1ORCID

Affiliation:

1. State Key Laboratory of Marine Environmental Science / Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology Xiamen University Xiamen China

Abstract

AbstractIn this study, we explored the realized thermal sensitivities of various phytoplankton groups in natural seawater, a crucial aspect for understanding the dynamics of marine ecosystems under climate change. Utilizing a decadal pigment dataset (2002–2015) from China Seas and employing generalized additive mixed models coupled with maximum entropy modeling, we discerned thermal sensitivity differentiations among nine phytoplankton groups, encompassing the full‐size spectrum. Our findings revealed that cryptophytes were exceptionally thermally sensitive, with a strong correlation between temperature changes and biomass variance. Characterized by a preference for cooler waters, cryptophytes had a low mean temperature niche and a narrow niche breadth. Notably, they exhibited the lowest temperature tipping point, highlighting their heightened vulnerability to warming trends. These findings underscored the significance of cryptophytes, an often‐overlooked group, in understanding ecosystem responses to climate shifts, and emphasized their potential role as key indicators in marine ecological studies under global warming.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Publisher

Wiley

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