Modelling the effects of chromatic adaptation on phytoplankton community structure in the oligotrophic ocean
Modelling the effects of chromatic adaptation on phytoplankton community structure in the oligotrophic ocean
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DOI：
10.3354/meps08588
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发表时间：
2010-01-01
影响因子：
2.5
通讯作者：
Follows, M. J.
中科院分区：
文献类型：
--
作者：
Hickman, A. E.;Dutkiewicz, S.;Follows, M. J.
我们利用基于性状的生态系统模型探讨了颜色适应在形成垂直浮游植物群落结构中的作用。该模型包括1000种“浮游植物类型”，并在一维框架中应用于营养不足的南大西洋环流，其中“浮游植物类型”指的是随机分配独特生理特征的模式浮游植物。该模型结合了不同浮游植物的多光谱光学和光吸收特性。该模型成功地再现了观测到的硝酸盐垂直梯度、浮游植物总体特性和群落结构。具有类似聚藻球菌的光谱吸收特性的模式浮游植物类型在深海中处于劣势，而在深海中，类似真核生物的光谱特性具有优势。相比之下，光抑制对高光和弱光原绿球藻模型类似物的垂直分离很重要。此外，温度依赖性对浮游植物类型的温度梯度选择具有重要意义。最适合或成功的浮游植物类型的特征是同时具有适合其特定水柱深度的最佳特征的组合，这反映了浮游植物共同进化了在特定环境条件或生态位中有利的多种特征的观点。
We explored the role of chromatic adaptation in shaping vertical phytoplankton community structures using a trait-based ecosystem model. The model included 1000 'phytoplankton types' and was applied to the oligotrophic South Atlantic Gyre in a 1-dimensional framework, where 'phytoplankton types' refers to the model phytoplankton that were stochastically assigned unique physiological characteristics. The model incorporates multi-spectral optics and light absorption properties for the different phytoplankton. The model successfully reproduced observed vertical gradients in the nitrate, bulk phytoplankton properties and community structure. Model phytoplankton types with Synechococcus-like spectral light absorption properties were outcompeted at depth, where eukaryote-like spectral properties were advantageous. In contrast, photoinhibition was important for vertical separation of high-light and low-light Prochlorococcus model analogues. In addition, temperature dependence was important for selection of phytoplankton types on the temperature gradient. The fittest, or successful, phytoplankton types were characterised by combinations of simultaneously optimal traits that suited them to a particular depth in the water column, reflecting the view that phytoplankton have co-evolved multiple traits that are advantageous in a particular environmental condition or niche.