A unified framework for herbivore-to-producer biomass ratio reveals the relative influence of four ecological factors.
A unified framework for herbivore-to-producer biomass ratio reveals the relative influence of four ecological factors.
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食草动物与生产者生物量比率的统一框架揭示了四种生态因素的相对影响。
DOI：
10.1038/s42003-020-01587-9
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发表时间：
2021-01-08
影响因子：
5.9
通讯作者：
Hairston NG Jr
中科院分区：
文献类型：
--
作者：
Kazama T;Urabe J;Yamamichi M;Tokita K;Yin X;Katano I;Doi H;Yoshida T;Hairston NG Jr
草食动物与初级生产者的生物量比例反映了群落的结构。影响这一比例的主要因素有四个，包括生产率、生产者的防御特性和营养成分以及食肉动物的捕食。然而，确定这些因素在自然群落中的联合影响一直是难以捉摸的，部分原因是缺乏一个框架来同时检查它们的影响。在这里，我们开发了一个基于Lotka-Volterra方程的框架，用于研究这些因素对生物量比率的影响。然后，我们利用它来测试，如果这些因素同时影响淡水浮游生物群落的生物量比例。我们发现，所有四个因素都对生物量比率有显着的贡献，食肉动物丰度的影响最大，其次是生产者的化学计量养分含量。因此，本框架应有助于审查形成各种类型的水生和陆生群落的多种因素。Takehiro Kazama等人基于Lotka-Volterra模型开发了一个框架，以确定生产率，防御性状，生产者的营养含量和捕食的相对影响，影响群落中草食动物与初级生产者的生物量比例。他们将这一框架应用于淡水浮游生物系统，发现虽然所有因素都会影响生物量比例，但食肉动物丰度的相对影响最大。
The biomass ratio of herbivores to primary producers reflects the structure of a community. Four primary factors have been proposed to affect this ratio, including production rate, defense traits and nutrient contents of producers, and predation by carnivores. However, identifying the joint effects of these factors across natural communities has been elusive, in part because of the lack of a framework for examining their effects simultaneously. Here, we develop a framework based on Lotka–Volterra equations for examining the effects of these factors on the biomass ratio. We then utilize it to test if these factors simultaneously affect the biomass ratio of freshwater plankton communities. We found that all four factors contributed significantly to the biomass ratio, with carnivore abundance having the greatest effect, followed by producer stoichiometric nutrient content. Thus, the present framework should be useful for examining the multiple factors shaping various types of communities, both aquatic and terrestrial. Takehiro Kazama et al. develop a framework based on Lotka–Volterra models to identify the relative influences of production rate, defense traits, nutrient contents of producers, and predation, in affecting the biomass ratio of herbivores to primary producers in a community. They apply this framework to freshwater plankton systems and find that while all factors affect the biomass ratio, carnivore abundance has the greatest relative influence.
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影响因子：
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