Historical comparisons reveal altered competitive interactions in a guild of crustose coralline algae.
Historical comparisons reveal altered competitive interactions in a guild of crustose coralline algae.
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DOI：
10.1111/ele.12247
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发表时间：
2014-04
期刊：
影响因子：
8.8
通讯作者：
Sophie J. McCoy;C. Pfister
中科院分区：
文献类型：
--
作者：
Sophie J. McCoy;C. Pfister
随着海洋环境随着时间的推移而变化，长期数据集和历史比较的缺乏限制了对自然系统中群落动态随时间变化的探索。在这里，我们使用长期实验数据集来提供证据，证明从 20 世纪 80 年代至今，东北太平洋的一组甲壳珊瑚藻 (CCA) 的竞争优势发生了逆转。 CCA 是分布于全球的世界性物种，是潮间带和潮下带系统中的主要空间持有者。竞争实验表明，先前竞争优势物种的竞争能力明显较低，并且竞争动态对食草动物存在的反应减弱。从调查数据中获得的竞争网络显示 2013 年和 80 年代的一致性，但也显示整个组合的互动强度有所下降。我们讨论了环境变化（包括海洋酸化）在该系统生态动态变化中的潜在作用。
As the ocean environment changes over time, a paucity of long-term data sets and historical comparisons limits the exploration of community dynamics over time in natural systems. Here, we used a long-term experimental data set to present evidence for a reversal of competitive dominance within a group of crustose coralline algae (CCA) from the 1980s to present time in the northeast Pacific Ocean. CCA are cosmopolitan species distributed globally, and dominant space holders in intertidal and subtidal systems. Competition experiments showed a markedly lower competitive ability of the previous competitively dominant species and a decreased response of competitive dynamics to grazer presence. Competitive networks obtained from survey data showed concordance between the 1980s and 2013, yet also revealed reductions in interaction strengths across the assemblage. We discuss the potential role of environmental change, including ocean acidification, in altered ecological dynamics in this system.