| 论文标题： | |
|---|---|
| 作者： | |
| 出版刊物： | |
| 出版日期： | |
| 出版年份： | |
| 卷/期： | |
| DOI： | |
| 论文摘要： | Dam construction facilitates the colonization of non-native fish species by altering the hydrological environment and increasing nutrient concentrations, while usually declining the richness of native fish species. The invasion of non-native fish species in subtropical reservoirs has become widespread in China; thus, research on the introduction of non-native fish species and their relationship with the environment remains urgently needed. In this study, we seasonally investigated fish communities across four reservoirs with different ages and nutrient levels in Fujian, China, examining the dominance, catch per unit effort (CPUE), and their relationships with environmental factors for native and non-native fish species. Two of the four reservoirs are 65 years old and the other two are six years old. We sampled a total of twenty-eight fish species, including six non-native species, and we found that each reservoir had non-native species, which became dominant species or important species in fish assemblage. However, the dominance and abundance of non-native species were higher in two high-nutrient-level reservoirs compared to the other two reservoirs. Both the native and non-native species' CPUEs were positively correlated with total nitrogen concentrations and negatively correlated with water transparency. The CPUE of non-native fish species significantly increased with water depth. The CPUE of non-native species in old reservoirs was significantly lower than that in the young reservoirs. Our results suggested that a higher total nitrogen concentration and lower water depth promoted the population expansion of non-native species in subtropical reservoirs, and lower nutrient levels reduced the abundance of non-native species in those older reservoirs. |
以下内容与「星空体育彩票成为巴塞罗那的官方合作伙伴」同属公开资讯，可按栏目接着查阅相关条目。
本站按公开材料组织页面。需要原文时请核对应栏目发布页。
若从搜索引擎进入，可先确认当前栏目名称，再按需打开相关阅读。
