Marine phytoplankton resilience may moderate oligotrophic ecosystem responses and biogeochemical feedbacks to climate change
Marine phytoplankton resilience may moderate oligotrophic ecosystem responses and biogeochemical feedbacks to climate change
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DOI：
10.1002/lno.12029
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发表时间：
2022-02
影响因子：
4.5
通讯作者：
A. Martiny;G. Hagstrom;T. DeVries;R. Letscher;G. Britten;Catherine A. Garcia;Eric Galbraith;D. Karl;S. Levin;M. Lomas;A. R. Moreno;D. Talmy;Weilei Wang;Katsumi Matsumoto
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作者：
A. Martiny;G. Hagstrom;T. DeVries;R. Letscher;G. Britten;Catherine A. Garcia;Eric Galbraith;D. Karl;S. Levin;M. Lomas;A. R. Moreno;D. Talmy;Weilei Wang;Katsumi Matsumoto
海洋正在变成沙漠吗？温度上升、地表分层增加和营养物垂直输入减少预计将导致温暖、营养物枯竭的生态系统扩大。预计这种扩张将对三个关键的海洋生物地球化学特征产生负面影响：浮游植物生物量，初级生产力和碳输出。然而，浮游植物群落是复杂的适应系统，具有巨大的多样性，可以使它们至少部分地适应全球变化。这可以通过原绿球藻“集体”的生物学来说明。适应对抗压力，使用替代营养源和节俭的资源分配可以让原绿球藻缓冲气候驱动的营养物质可用性变化。相比之下，细胞生理学对温度变化更敏感。在这里，我们认为，生物地球化学模型需要考虑不同的浮游植物群落的适应潜力。然而，由于缺乏全球海洋地理观测来测试理论，因此对浮游植物对未来海洋变化的适应力的充分了解受到阻碍。我们建议，弹性实际上可能是更大的贫营养沃茨比目前考虑的浮游植物生物量，初级生产力和碳输出的未来预测的影响。
Are the oceans turning into deserts? Rising temperature, increasing surface stratification, and decreasing vertical inputs of nutrients are expected to cause an expansion of warm, nutrient deplete ecosystems. Such an expansion is predicted to negatively affect a trio of key ocean biogeochemical features: phytoplankton biomass, primary productivity, and carbon export. However, phytoplankton communities are complex adaptive systems with immense diversity that could render them at least partially resilient to global changes. This can be illustrated by the biology of the Prochlorococcus “collective.” Adaptations to counter stress, use of alternative nutrient sources, and frugal resource allocation can allow Prochlorococcus to buffer climate‐driven changes in nutrient availability. In contrast, cell physiology is more sensitive to temperature changes. Here, we argue that biogeochemical models need to consider the adaptive potential of diverse phytoplankton communities. However, a full understanding of phytoplankton resilience to future ocean changes is hampered by a lack of global biogeographic observations to test theories. We propose that the resilience may in fact be greater in oligotrophic waters than currently considered with implications for future predictions of phytoplankton biomass, primary productivity, and carbon export.