Coupling long‐term studies with meta‐analysis to investigate impacts of non‐native crayfish on zoobenthic communities
Coupling long‐term studies with meta‐analysis to investigate impacts of non‐native crayfish on zoobenthic communities
复制标题
将长期研究与荟萃分析相结合，调查非本地小龙虾对底栖动物群落的影响
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
M. J. Zanden
中科院分区：
文献类型：
--
作者：
J. Mccarthy;C. Hein;J. Olden;M. J. Zanden
摘要1.生物入侵被广泛认为是人类引起的环境变化的重要组成部分，也是对本地生物多样性的主要威胁。物种入侵的负面影响对淡水小龙虾动物群尤其明显。2.本研究通过将小规模实验研究的荟萃分析与在美国威斯康星州Sparkling Lake（46� 00�N，89� 42�W）进行的24年长期观察研究相结合，提供了对本地和非本地小龙虾对底栖动物群落（重点是非本地锈小龙虾，Orconectes rusticus）的生态影响的新见解。3.荟萃分析定量总结了跨越四大洲的七种小龙虾的笼内实验结果。我们发现，总的底栖动物密度（主要是腹足类和双翅目）显着较低的处理含有小龙虾相对于对照组，结果是显着的非本地的小龙虾，但不是小龙虾在其本地范围内，也许是由于样本量小。与其他物种相比，锈小龙虾也与蜉蝣目呈负相关。4.从时间序列分析比较生锈的小龙虾和无脊椎动物丰度的时间趋势的结果与荟萃分析的结果是一致的。底栖动物、双翅目、蜉蝣目、蜻蜓目以及毛翅目各科的丰度与锈螯虾数量呈负相关。5.通过结合短期和长期研究的结果，我们的研究对水生系统中小龙虾-无脊椎动物相互作用的性质提供了更深入的了解，揭示了入侵小龙虾对本地动物群的一致影响。控制和管理入侵物种的知识，执行良好的小规模的研究，可以推断，以了解更大规模的生态相互作用。
SUMMARY 1. Biological invasions are widely recognised as a significant component of human-caused environmental change and a primary threat to native biodiversity. The negative impacts of species invasions are particularly evident for freshwater crayfish faunas. 2. This study provides novel insight into the ecological effects of native and non-native crayfish on zoobenthic communities (with emphasis on the non-native rusty crayfish, Orconectes rusticus) across broad scales by combining a meta-analysis of small-scale experimental studies with a long-term observational study conducted over a 24 year period in Sparkling Lake, Wisconsin, U.S.A. (46� 00¢N, 89� 42¢W). 3. The meta-analysis summarised quantitatively the results of cage experiments for seven species of crayfish spanning four continents. We found that total zoobenthos densities (primarily Gastropoda and Diptera) were significantly lower in treatments containing crayfish relative to controls; a result that was significant for non-native crayfish but not for crayfish in their native range, perhaps owing to a small sample size. In contrast to other species, rusty crayfish were also negatively associated with Ephemeroptera. 4. Results from the time series analysis comparing temporal trends in rusty crayfish and invertebrate abundances from Sparkling Lake were consistent with the findings from the meta-analysis. Rusty crayfish were negatively correlated with the abundance of total zoobenthos, Diptera, Ephemeroptera and Odonata, as well as families of Trichoptera. 5. By coupling the results from short and long-term research, our study offers greater insight into the nature of crayfish-invertebrate interactions in aquatic systems, revealing consistent effects of invasive crayfish on native fauna. The control and management of invasive species is facilitated by the knowledge that well executed small-scale studies may be extrapolated to understand larger-scale ecological interactions.