Modelling mixotrophic functional diversity and implications for ecosystem function
Modelling mixotrophic functional diversity and implications for ecosystem function
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DOI：
10.1093/plankt/fby044
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发表时间：
2018-11-01
影响因子：
2.1
通讯作者：
Flynn, Kevin John
中科院分区：
文献类型：
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作者：
Leles, Suzana Goncalves;Polimene, Luca;Flynn, Kevin John
混合营养在原生浮游生物中广泛存在，在各种大小范围内表现出多种功能形式。然而，人们对不同混合营养体的生态位及其对海洋生态系统营养循环和营养动力学的影响知之甚少。在此，我们建立了一个包含混合营养功能多样性的浮游生物食物网模型。对具有先天光合能力的混合营养体（组成型混合营养体，CMs）和那些从猎物获得光营养的混合营养体（非组成型混合营养体，ncm）进行了区分。我们提出了不同的光和营养制度限制的生态系统的模拟。我们的模拟表明，严格自养和异养竞争对手在从营养限制到光限制的过渡中相对重要性增加，这与观测到的海洋生物量比率一致。在CMs中，细胞
Mixotrophy is widespread among protist plankton displaying diverse functional forms within a wide range of sizes. However, little is known about the niches of different mixotrophs and how they affect nutrient cycling and trophodynamics in marine ecosystems. Here we built a plankton food web model incorporating mixotrophic functional diversity. A distinction was made between mixotrophs with the innate capacity for photosynthesis (constitutive mixotrophs, CMs) and those which acquire phototrophy from their prey (non-constitutive mixotrophs, NCMs). We present the simulations of ecosystems limited by different light and nutrient regimes. Our simulations show that strict autotrophic and heterotrophic competitors increased in relative importance in the transition from nutrient to light limitation, consistent with observed oceanic biomass ratios. Among CMs, cells