Bonk Maciej, Bobrek Rafał
Institute of Nature Conservation, Polish Academy of Sciences, al. Adama Mickiewicza 33, 31-120, Kraków, Poland.
Polish Society for the Protection of Birds, ul. Odrowąża 24, 05-270, Marki, Poland.
Environ Sci Pollut Res Int. 2021 Jun;28(24):31831-31837. doi: 10.1007/s11356-021-12750-y. Epub 2021 Feb 22.
The aim of this study was to assess whether regulated river reaches show higher numbers of the spiny cheek crayfish Faxonius limosus, a common freshwater invader in Europe. Man-made alterations of riverine habitats may increase their susceptibility to biological invasions. This phenomenon is commonly studied in the context of dam reservoirs; however, the impact of river channelization and the resulting riverine habitat homogenization on the success of invasive species are mostly lacking. Surveys were conducted in natural and channelised river stretches in five rivers of south-central Poland. General linear mixed model analysis showed that crayfish abundance is usually higher at sites located within regulated reaches. The likely reason for the detected differences in abundance of crayfish may be related to decreased food-web complexity and lack of predators in a homogenised habitat. The results suggest that the channelization of small watercourses may increase the abundance of invasive species F. limosus and its pressure on native European crayfish. However, due to limited data obtained in field, our study should be considered as a pilot one.
本研究的目的是评估经过整治的河段中多刺脸颊小龙虾（Faxonius limosus）的数量是否更多，这种小龙虾是欧洲常见的淡水入侵物种。河流栖息地的人为改变可能会增加其对生物入侵的易感性。这种现象通常是在大坝水库的背景下进行研究的；然而，河道渠化以及由此导致的河流栖息地同质化对入侵物种成功入侵的影响大多仍未得到研究。在波兰中南部五条河流的天然河段和渠化河段进行了调查。一般线性混合模型分析表明，小龙虾的丰度通常在经过整治的河段内的地点更高。检测到的小龙虾丰度差异的可能原因可能与食物网复杂性降低以及同质化栖息地中缺乏捕食者有关。结果表明，小型水道的渠化可能会增加入侵物种多刺脸颊小龙虾的丰度及其对欧洲本土小龙虾的压力。然而，由于实地获得的数据有限，我们的研究应被视为一项试点研究。
