Larina Ekaterina, Woodhouse Adam, Swain Anshuman, Lowery Christopher M, Martindale Rowan C, Myers Corinne E
Department of Earth and Planetary Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, 78712, USA.
University of Texas Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, 78758, USA.
Nat Commun. 2025 May 30;16(1):5056. doi: 10.1038/s41467-025-60362-8.
Recent studies highlight asymmetrical range shifts within plankton due to spatial variability in climate change, impacting marine ecosystem functioning and biogeochemical cycling. The Pliocene-early Pleistocene interval, characterized by significant climatic fluctuations, provides a framework to study regional responses of marine organisms, such as planktic foraminifera. Using bipartite network analysis of the Triton database, we investigate biogeographic shifts in macroperforate planktic foraminifera ecogroups, tracking taxonomic diversity and distribution. Here we show high turnover between symbiont-bearing warm-water and high-latitude dwellers, isolated to the North Atlantic, and an expansion of cold-water subthermocline taxa across basins, particularly in the South Pacific. Enhanced water column stratification and nutrient export to mesopelagic depths, associated with the intensification of the Northern Hemisphere Glaciation, likely drove shifts in species diversity and ecogroup latitudinal gradients toward modern patterns. This localized community restructuring emphasizes the importance of regional to hemispheric heterogeneity in understanding biodiversity responses to future climate change.
近期研究强调，由于气候变化的空间变异性，浮游生物出现不对称的范围变化，这影响了海洋生态系统功能和生物地球化学循环。上新世至早更新世期间气候波动显著，为研究海洋生物（如浮游有孔虫）的区域响应提供了一个框架。通过对Triton数据库进行二分网络分析，我们研究了大型穿孔浮游有孔虫生态类群的生物地理变化，追踪分类多样性和分布情况。我们发现，在北大西洋隔离的、携带共生体的暖水生物与高纬度生物之间存在着高周转率，并且冷水亚温跃层类群在各海域都有扩张，尤其是在南太平洋。与北半球大冰期加剧相关的水柱分层增强和营养物质向中深层的输出，可能推动了物种多样性和生态类群纬度梯度向现代模式的转变。这种局部群落重组强调了区域到半球异质性在理解生物多样性对未来气候变化响应方面的重要性。
