Warming leads to higher species turnover in a coastal ecosystem
Warming leads to higher species turnover in a coastal ecosystem
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DOI：
10.1111/j.1365-2486.2009.02045.x
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发表时间：
2010-04-01
影响因子：
11.6
通讯作者：
Snoeijs, Pauline
中科院分区：
文献类型：
--
作者：
Hillebrand, Helmut;Soininen, Janne;Snoeijs, Pauline
生态群落和生态系统对环境变化速度加快的反应将受到群落组成多样性变化的强烈影响。然而，我们对气温上升如何影响多样性的理解是不确定的，主要基于间接证据或短期实验。在我们的研究中，我们分析了在瑞典海岸的核电厂的热水槽内的底栖epilithic社区的多样性和物种营业额。这个水槽涵盖了预测未来气温上升的范围。物种组成显着不同的控制网站和网站与较高的温度。我们发现，温度对三个功能组（大型无脊椎动物，底栖硅藻和大型植物，其中包括多细胞藻类和宏观菌落的单细胞藻类和蓝藻）的物种数量的影响不大，无论是在单一的采样日期，也不总结整个观察年。然而，硅藻，水生植物和无脊椎动物的物种营业额显着增加，随着温度的升高。不同的温度制度导致显着不同的物种组成和指示物种。因此，温度升高的热水槽增加时间β多样性和社区的组成稳定性下降，虽然观察到的丰富度没有改变在任何时间点。我们强调需要调查的后果，这种下降的组成稳定性的功能稳定的生态系统过程。
The responses of ecological communities and ecosystems to increased rates of environmental change will be strongly influenced by variation in the diversity of community composition. Yet, our understanding of how diversity is affected by rising temperatures is inconclusive and mainly based on indirect evidence or short-term experiments. In our study, we analyse the diversity and species turnover of benthic epilithic communities within the thermal flume of a nuclear power plant at the Swedish coast. This flume covers the range of predicted future temperature rises. Species composition was significantly different between control sites and sites with higher temperatures. We found that temperature had little effect on the number of species in three functional groups (macroinvertebrates, benthic diatoms, and macrophytes, which here comprise multicellular algae and macroscopic colonies of unicellular algae and cyanobacteria), neither at single sampling dates nor summed for the entire observation year. However, species turnover significantly increased with increasing temperature for diatoms, macrophytes and invertebrates. Different temperature regimes resulted in significantly different species composition and indicator species. Thus, increasing temperatures in the thermal flume increased temporal beta-diversity and decreased compositional stability of communities, although observed richness did not change at any point in time. We highlight the need to investigate the consequences of such declines in compositional stability for functional stability of ecosystem processes.