Interacting environmental mosaics drive geographic variation in mussel performance and predation vulnerability
Interacting environmental mosaics drive geographic variation in mussel performance and predation vulnerability
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DOI：
10.1111/ele.12613
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发表时间：
2016-07-01
期刊：
影响因子：
8.8
通讯作者：
Washburn, Libe
中科院分区：
文献类型：
--
作者：
Kroeker, Kristy J.;Sanford, Eric;Washburn, Libe
虽然理论表明物种表现的地理差异是由多个生态位参数决定的，但很少考虑到相互作用的压力源的空间结构，这些压力源可能会塑造当地和区域对全球变化的脆弱性。在这里，我们使用空间上明确的马赛克碳酸盐化学，食物供应和温度跨越1280公里的海岸线，以测试是否持久，重叠的环境马赛克介导的增长和捕食脆弱性的一个关键的基础物种，贻贝加州贻贝。我们发现，增长是最高的，捕食脆弱性是最低的动态环境中频繁暴露于低pH值的海水和一致的食物。相比之下，增长是最低的，捕食脆弱性最高时，暴露于低pH值的海水是脱钩的高粮食供应，或在异常温暖的地方。这些结果说明了多个驱动因素之间的相互作用如何导致物种表现，相互作用和对环境变化的脆弱性的意想不到的，但持久的地理马赛克。
Although theory suggests geographic variation in species' performance is determined by multiple niche parameters, little consideration has been given to the spatial structure of interacting stressors that may shape local and regional vulnerability to global change. Here, we use spatially explicit mosaics of carbonate chemistry, food availability and temperature spanning 1280 km of coastline to test whether persistent, overlapping environmental mosaics mediate the growth and predation vulnerability of a critical foundation species, the mussel Mytilus californianus. We find growth was highest and predation vulnerability was lowest in dynamic environments with frequent exposure to low pH seawater and consistent food. In contrast, growth was lowest and predation vulnerability highest when exposure to low pH seawater was decoupled from high food availability, or in exceptionally warm locations. These results illustrate how interactions among multiple drivers can cause unexpected, yet persistent geographic mosaics of species performance, interactions and vulnerability to environmental change.