Bottom‐up influences on tropical freshwater food web structure support the “environmental filtering” hypothesis
Bottom‐up influences on tropical freshwater food web structure support the “environmental filtering” hypothesis
复制标题
对热带淡水食物网结构的自下而上的影响支持“环境过滤”假说
DOI：
--
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
D. Yeo
中科院分区：
文献类型：
--
作者：
J. H. Liew;T. Jardine;R. Lim;J. Kwik;H. Tan;Z. Y. Kho;D. Yeo
随着人们越来越一致地认为生态系统功能的丧失会产生广泛的后果，对生态系统功能的研究在科学界得到了越来越多的支持。食物网是一个群落中存在的类群(以节点为代表)之间的所有营养相互作用的网络，是生态系统功能的重要方面，但对影响其组装和结构的因素和机制缺乏明确的了解。在我们的研究中，我们通过研究(1)环境过滤和(2)生物过滤在控制食物网结构中的各自作用来解决这个基本问题。我们通过评估五个高分辨率经验热带食物网的网络结构与相关的环境和生物协变量之间的关系来做到这一点。我们的数据表明，只有环境过滤才是塑造食物网的重要因素。此外，我们发现潜在的生态机制是自下而上影响的函数，包括资源水平，在较小程度上，还包括可用的资源类型(即陆地有机质)。具体地说，我们的数据表明，高营养环境倾向于更复杂的食物网络。在群落聚集的一般背景下，我们的发现通过证明先前显示的影响物种聚集的环境条件也可以推动主流物种相互作用的趋势，从而增加了对这一过程的现有知识。
Studies of ecosystem functions are gaining traction in the scientific community along with a growing consensus that losses in ecosystem functions have widespread consequences. Food webs, which are networks comprising all trophic interactions (represented by links) between taxa present in a community (represented by nodes), are important aspects of ecosystem functioning, yet a clear understanding of the factors and mechanisms influencing their assembly and structure is lacking. In our study, we addressed this fundamental question by investigating the respective roles of (1) environmental filtering and (2) biotic filtering, in governing food web structure. We did this by assessing the relationship between the network structure of five high‐resolution empirical tropical food webs and associated environmental and biotic covariates. Our data suggest that only environmental filtering is important in shaping food webs. Further, we found that the underlying ecological mechanism is a function of bottom‐up influences comprising resource levels, and to a lesser degree, resource type (i.e., terrestrial organic matter) available. Specifically, our data suggest high‐nutrient environments favor greater food web complexity. In the general context of community assembly, our findings add to existing knowledge of the process by demonstrating that environmental conditions previously shown to influence species assemblages can also drive trends in prevailing species interactions.
影响因子：
8.8
作者：
Heckmann, Lotta;Drossel, Barbara;Guill, Christian
通讯作者：
Guill, Christian