PDF(Pubmed)
Abstract：
Species range shifts due to changing ocean conditions are occurring around the world. As species move, they build new interaction networks as they shift from or into new ecological communities. Typically, species ranges are modeled individually, but biotic interactions have been shown to be important to creating more realistic modeling outputs for species. To understand the importance of consumer interactions in Eastern Pacific kelp forest species distributions, we used a Maxent framework to model a key foundation species, giant kelp (Macrocystis pyrifera), and a dominant herbivore, purple sea urchins (Strongylocentrotus purpuratus). With neither species having previously been modeled in the Eastern Pacific, we found evidence for M. pyrifera expansion in the northern section of its range, with no projected contraction at the southern range edge. Despite its known co-occurrence with M. pyrifera, models of S. purpuratus showed a non-concurrent southern range contraction and a co-occurring northern range expansion. While the co-occurring shifts may lead to increased spatial competition for suitable substrate, this non-concurrent contraction could result in community wide impacts such as herbivore release, tropicalization, or ecosystem restructuring.
摘要：
由于海洋条件的变化，世界各地都在发生物种范围的变化。随着物种的移动，当他们从新的生态社区转移到新的生态社区时，他们建立了新的互动网络。通常,物种范围是单独建模的，但是生物相互作用已被证明对于为物种创建更真实的建模输出很重要。为了了解东太平洋海带森林物种分布中消费者互动的重要性，我们使用了Maxent框架来建模一个关键的基础物种，巨大的海带（大囊藻），和主要的食草动物，紫色海胆（紫癜）。以前没有在东太平洋建模过任何物种，我们发现了在其范围的北部扩展的证据，南部山脉边缘没有预计的收缩。尽管已知它与M.pyrifera共现，紫癜的模型显示了非并发的南部范围收缩和同时发生的北部范围扩展。虽然共同发生的变化可能导致对合适衬底的空间竞争增加，这种非并发的收缩可能会导致社区范围内的影响，例如食草动物的释放，热带化，或生态系统重组。
