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Positive and negative interactions jointly determine the structure of Müllerian mimetic communities
Oikos ( IF 3.4 ) Pub Date : 2020-03-23 , DOI: 10.1111/oik.06789
Thomas G. Aubier 1, 2 , Marianne Elias 3
Affiliation  

Negative and positive ecological interactions have opposite effects on the structure of ecological communities, in particular in terms of ecological similarity among interacting species. In nature, species belonging to the same guild often interact in both negative and positive ways, yet the interplay between interactions of different kinds in intraguild community dynamics remains poorly understood. Müllerian mimetic communities are particularly suited for investigating this interplay because positive (mutualistic mimicry) and negative (competition for trophic resource and micro‐habitat) interactions are relatively easy to identify. Empirical research has shown that the combination of mutualistic mimicry and competition does not necessarily drive convergence along all dimensions of the ecological niche, but the determinants of such mixed result are unknown. Here, we analyze the structure of Müllerian mimetic communities simulated with an agent‐based model. We show that mutualistic mimicry favours ecological similarity on dimensions along which similarity favours fine‐scale co‐occurrence. Co‐mimetic species use similar micro‐habitats, but do not necessarily use similar resources. Heterogeneity of resources among micro‐habitats is necessary for ecological similarity on resource use among co‐mimetic species to occur. We therefore highlight the importance of fine‐scale co‐occurrence if we are to understand how positive and negative interactions structure ecological communities.

中文翻译:

正负互动共同决定了缪勒式模仿社区的结构

正面和负面的生态相互作用对生态群落的结构具有相反的影响,特别是在相互作用物种之间的生态相似性方面。在自然界中,属于同一个公会的物种经常以消极和积极的方式相互作用,但是在公会内部社区动态中不同种类的相互作用之间的相互作用仍然知之甚少。缪勒式模仿社区特别适合研究这种相互作用,因为正面(相互模仿)和负面(对营养资源和微栖息地的竞争)相互作用相对容易识别。实证研究表明,相互模仿和竞争的结合并不一定会推动生态位各个维度的趋同,但是这种混合结果的决定因素未知。在这里,我们分析了基于主体模型模拟的缪勒式模仿社区的结构。我们表明,互惠模仿在维度上倾向于生态相似,而相似则倾向于精细共现。相似物种使用相似的微生境,但不一定使用相似的资源。微观栖息地之间资源的异质性对于拟模仿物种之间资源利用的生态相似性是必要的。因此,如果我们要了解正向和负向相互作用如何构成生态群落,则我们强调了规模共现的重要性。我们表明,互惠模仿在维度上倾向于生态相似,而相似则倾向于精细共现。相似物种使用相似的微生境,但不一定使用相似的资源。微观栖息地之间资源的异质性对于拟相似物种之间资源利用的生态相似性是必要的。因此,如果我们要了解正向和负向相互作用如何构成生态群落,则我们强调了规模共现的重要性。我们表明,互惠模仿在维度上倾向于生态相似,而相似则倾向于精细共现。相似物种使用相似的微生境,但不一定使用相似的资源。微观栖息地之间资源的异质性对于拟模仿物种之间资源利用的生态相似性是必要的。因此,如果我们要了解正向和负向相互作用如何构成生态群落,则我们强调了规模共现的重要性。
更新日期:2020-03-23
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