Realized niches explain spatial gradients in seasonal abundance of phytoplankton groups in the South China Sea
Realized niches explain spatial gradients in seasonal abundance of phytoplankton groups in the South China Sea
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DOI：
10.1016/j.pocean.2018.03.008
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发表时间：
2018-03
影响因子：
4.1
通讯作者：
Wupeng Xiao;Lei Wang;E. Laws;Yuyuan Xie;Jixin Chen;Xin Liu;Bingzhang Chen;Bangqin Huang
中科院分区：
文献类型：
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作者：
Wupeng Xiao;Lei Wang;E. Laws;Yuyuan Xie;Jixin Chen;Xin Liu;Bingzhang Chen;Bangqin Huang
海洋科学的一个基本但难以捉摸的目标是从生物群落经历的多种环境条件中预测它们的结构。估计实现生态位为基础的性状（实现性状）的浮游植物物种或功能组在温带海洋表明，响应性状可以帮助揭示负责结构浮游植物群落的机制，但这种方法还没有在热带和亚热带边缘海进行测试。在这里，我们使用的色素为基础的浮游植物群体和环境条件在南中国海的十年尺度的研究，以测试是否实现的特征可以解释浮游植物变异的地理模式。我们估计的平均值和宽度的浮游植物实现生态位的基础上的响应组特定的浮游植物组成的关键环境因素，我们表明，在这个系统中的主要浮游植物群体的变化可以解释不同的适应性权衡所施加的温度，辐照度和营养盐浓度的限制。权衡模式的差异清楚地将主导群体彼此分开，并产生了四组反映所观察到的地理分布模式的实现特征。浮游植物实现生态位和相关的特征，我们在本研究中的特点，可以帮助预测的响应浮游植物在南海环境条件的变化，并可以纳入全球海洋地球化学模型，以预测未来气候情景下的群落结构的变化。
A basic albeit elusive goal of ocean science is to predict the structure of biological communities from the multitude of environmental conditions they experience. Estimates of the realized niche-based traits (realized traits) of phytoplankton species or functional groups in temperate seas have shown that response traits can help reveal the mechanisms responsible for structuring phytoplankton communities, but such approaches have not been tested in tropical and subtropical marginal seas. Here, we used decadal-scale studies of pigment-based phytoplankton groups and environmental conditions in the South China Sea to test whether realized traits could explain the biogeographic patterns of phytoplankton variability. We estimated the mean and breadth of the phytoplankton realized niches based on responses of the group-specific phytoplankton composition to key environmental factors, and we showed that variations of major phytoplankton groups in this system can be explained by different adaptive trade-offs to constraints imposed by temperature, irradiance, and nutrient concentrations. Differences in the patterns of trade-offs clearly separated the dominant groups from one another and generated four sets of realized traits that mirrored the observed biogeographic distribution patterns. The phytoplankton realized niches and their associated traits that we characterized in the present study could help to predict responses of phytoplankton to changes in environmental conditions in the South China Sea and could be incorporated into global biogeochemical models to anticipate shifts in community structure under future climate scenarios.