Effects of multiple timescales of resource supply on the maintenance of species and functional diversity
Effects of multiple timescales of resource supply on the maintenance of species and functional diversity
复制标题
资源供应的多个时间尺度对物种和功能多样性维持的影响
DOI：
10.1111/oik.04937
复制
发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Edwards, Kyle F.
中科院分区：
文献类型：
--
作者：
Smith, Alaina N.;Edwards, Kyle F.
众所周知，可变的资源供应可以允许竞争者在单一的有限资源上共存，这是一种机制，可以解释在自相矛盾的物种群落中保持多样性。生态系统在一系列时间尺度上经历资源供应的波动，但我们对资源供应的多频率如何影响多样性和群落结构的维持缺乏了解。在这里，我们探讨这个问题，浮游植物竞争的限制营养素，参数化使用经验之间的权衡快速增长，养分储存能力和养分吸收亲和力的模型。与单一频率的营养供应相比，我们发现，多个频率的营养供应增加功能多样性，通过允许适应不同频率的供应的策略共存。物种丰富度也促进了多种模式的营养供应，但不一致的功能多样性。虽然这个模型是浮游植物的参数化，基本的动态和权衡可能发生在各种生态系统。我们的研究结果表明，时间变化的驱动社区的频谱应进一步调查的背景下，维护多样性和功能组成的社区在不同的环境制度。
It is well known that variable resource supply can allow competitors to coexist on a single limiting resource, and this is one mechanism that may explain the maintenance of diversity in paradoxically speciose communities. Ecosystems experience fluctuations in resource supply on a range of timescales, but we have a poor understanding of how multiple frequencies of resource supply affect the maintenance of diversity and community structure. Here we explore this question using a model of phytoplankton competition for a limiting nutrient, parameterized using empirical tradeoffs between rapid growth, nutrient storage capacity and nutrient uptake affinity. Compared to a single frequency of nutrient supply, we find that multiple frequencies of nutrient supply increase functional diversity, by permitting the coexistence of strategies adapted to different frequencies of supply. Species richness is also promoted by multiple modes of nutrient supply, but not as consistently as functional diversity. Although this model is parameterized for phytoplankton, the fundamental dynamics and tradeoffs likely occur in a variety of ecosystems. Our results suggest that the spectrum of temporal variation driving communities should be further investigated in the context of the maintenance of diversity and the functional composition of communities under different environmental regimes.
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影响因子：
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通讯作者：
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