Disentangling the influence of abiotic variables and a non-native predator on freshwater community structure
作者: Katie S. PagnuccoAnthony Ricciardi
作者单位: 11 Department of Biology, McGill University, Montreal, Quebec H3A 1B1 Canada
22 Redpath Museum and McGill School of Environment, McGill University, Montreal, Quebec H3A 0C4 Canada
刊名: Ecosphere, 2015, Vol.6 (12)
来源数据库: Ecological Society of America
DOI: 10.1890/ES15-00371.1
关键词: benthic macroinvertebratesbottom-up controlinvasive speciesmultiple driversNeogobius melanostomusround gobySt. Lawrence Riverstructural equation modelingtop-down control
原始语种摘要: Cause-and-effect interpretations of the apparent impacts of biological invasions are confounded by the coincident occurrence of non-native species and changes to abiotic factors. Native community structure and function can vary greatly in space and time, owing to abiotic variables that could potentially be affected by non-native species. Here, we sought to determine the relative importance of abiotic variables and an invasive predatory fish, the Eurasian round goby ( Neogobius melanostomus ), on local macroinvertebrate assemblages and benthic algal production in the St. Lawrence River. We used structural equation modeling to evaluate the strength of interaction pathways between hypothesized biotic and abiotic factors driving trophic cascades. Our results indicate that biotic interactions...
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关键词翻译
关键词翻译
  • abiotic 非生物的
  • native 国产的
  • variables 变量
  • community 群落
  • grazer 放牧牲畜
  • benthic 底栖的
  • importance 重要性
  • directionality 定向性
  • round 舍入
  • predator 捕食者