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Biotic resistance to fish invasions in southern China: Evidence from biomass, habitat, and fertility limitation

文献类型： 外文期刊

作者： Gu, Dangen 1 ; Jia, Tao 7 ; Wei, Hui 1 ; Fang, Miao 1 ; Yu, Fandong 1 ; Shu, Lu 1 ; Wang, Xuejie 1 ; Li, Gaojun 8 ; Cai, Xingwei 8 ; Mu, Xidong 1 ; Xu, Meng 1 ; Wang, Jianwei 3 ; Hu, Yinchang 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Minist Agr & Rural Affairs, Pearl River Fisheries Res Inst, Key Lab Prevent & Control Aquat Invas Alien Specie, Guangzhou, Peoples R China

2.Lingnan Modern Agr Sci & Technol, Zhaoqing Branch Ctr, Guangdong Lab, Zhaoqing, Peoples R China

3.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China

4.Univ Chinese Acad Sci, Beijing, Peoples R China

5.Chinese Acad Fisheries Sci, Pearl River Fisheries Res Inst, Key Lab Alien Species & Ecol Secur CAFS, Guangzhou, Peoples R China

6.Key Lab Aquat Anim Immune Technol Guangdong Prov, Guangzhou, Peoples R China

7.Minist Agr & Rural Affairs, Rural Energy Environm Agcy, Beijing, Peoples R China

8.Hainan Acad Ocean & Fisheries Sci, Haikou, Peoples R China

关键词： biological invasions; biotic resistance; fish species; rivers; southern China; species richness

期刊名称：ECOLOGICAL APPLICATIONS （ 2022影响因子：5.0； 五年影响因子：5.2 ）

ISSN： 1051-0761

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Understanding the mechanisms underlying the invasion success or failure of alien species can help to predict future invasions and cope with the invaders. The biotic resistance hypothesis posits that diverse communities are more resistant to invasion. While many studies have examined this hypothesis, the majority of them have focused on the relationship between alien and native species richness in plant communities, and results have often been inconsistent. In southern China, many rivers have been invaded by alien fish species, providing an opportunity to test the resistance of native fish communities to alien fish invasions. Using survey data for 60,155 freshwater fish collected from five main rivers of southern China for 3 years, we assessed the relationships between native fish richness and the richness and biomass of alien fishes at river and reach spatial scales, respectively. Based on two manipulative experiments, we further examined the impact of native fish richness on habitat selection and the reproductive ability of an exotic model species Coptodon zillii. We found no apparent relationship between alien and native fish richness, whereas the biomass of alien fish significantly decreased with increasing native fish richness. In experiments, C. zillii preferred to invade those habitats that had low native fish richness, given evenly distributed food resources; reproduction of C. zillii was strongly depressed by a native carnivorous fish Channa maculata. Together, our results indicate that native fish diversity can continue to provide biotic resistance to alien fish species in terms of limiting their growth, habitat selection, and reproduction when these aliens have successfully invaded southern China. We thus advocate for fish biodiversity conservation, especially for key species, to mitigate against the population development and ecological impact of alien fish species.

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