| 牛栏江流域浮游动物群落结构特征及驱动因子 |
| Zooplankton Community Structure and Driving Factors in the Niulan River Basin |
| 投稿时间：2022-03-11 修订日期：2022-04-22 |
| DOI：10.15928/j.1674-3075.202203110068 |
| 中文关键词:浮游动物 群落结构 驱动因子 丰水期 枯水期 牛栏江流域 |
| 英文关键词:zooplankton community structure driving factors wet season dry season Niulan River basin |
| 基金项目:生物多样性调查评估项目(2019HJ2096001006)。 |
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| 中文摘要: |
| 探究长江上游金沙江不同水文期浮游动物群落结构变化及其驱动因子，可为牛栏江流域水资源管理及水污染防治提供基础数据。2019年9月(丰水期)和2021年4月(枯水期)对金沙江支流牛栏江流域35个采样点的浮游动物及水质状况进行调查。结果表明，浮游动物为4类58属94种，其中原生动物21种(22.4%)，轮虫50种(53.2%)，枝角类13种(13.8%)，桡足类10种(10.6%)。丰水期浮游动物总丰度为18 334.57 个/L，总生物量为7.28 mg/L；枯水期浮游动物总丰度为10 736.25 个/L，总生物量为11.47 mg/L。检出浮游动物优势种5种，丰水期为异尾轮虫(Trichocerca sp.)、似邻壳虫(Tintionnopsis sp.)和累枝虫(Epistylis sp.)；枯水期为螺形龟甲轮虫(Keratella cochlearis)和长肢多肢轮虫(Polyarthra dolichoptera)。基于浮游动物丰度数据的非度量多维尺度分析(NMDS)表明，浮游动物群落组成在不同水文期之间及同一水文期内的上下游之间均存在显著差异，空间和温度是影响其分布的主要因素，地理距离越远，群落相似度越低；环境因子与浮游动物群落结构的相关性分析与检验评估表明，温度是影响其群落分布最主要的环境因子。 |
| 英文摘要: |
| Niulan River is an important tributary of Jinsha River, the upper Yangtze River, serving important ecological and social functions. In this study, we conducted a systematic investigation of zooplankton and water quality at 35 sampling sites in the Niulan River basin in September 2019 (wet season) and April 2021 (dry season), aiming to clarify the changes of zooplankton community structure and the driving factors affecting the distribution of zooplankton during the two hydrological periods. A total of 94 zooplankton species from 58 genera 4 classes were identified during the study, including 50 rotifers (53.2%), 21 protozoans (22.4%), 13 cladocerans (13.8%), and 10 copepods (10.6%). The total abundance and biomass of zooplankton in the basin were 18 334.57 ind/L and 7.28 mg/L in the wet season, and 10 736.25 ind/L and 11.47 mg/L in the dry season. Five dominant species were identified, and the dominant zooplankton species in wet season were Trichocerca sp., Tintionnopsis sp. and Epistylis sp., while the dominant species in dry season were Keratella cochlearis and Polyarthra dolichoptera. The Shannon-Wiener diversity, Margalef richness and Pielou evenness indices were in the ranges of 0-2, 0-3 and 0-1, respectively. There was no significant differences in the Shannon-Wiener diversity and Margalef richness indices between seasons, but the Pielou evenness index in dry season was significantly higher than in wet season. Non-metric multi-dimensional scaling (NMDS), based on zooplankton abundance, showed significant differences in zooplankton community composition by hydrological periods and between upstream and downstream within the same hydrological period. Location and temperature were the primary factors affecting zooplankton distribution and zooplankton similarity decreased with distance between sites. Spearman correlation and Partial Mantel tests were used to evaluate the relationship between environmental factors and zooplankton community structure, and the results show that temperature was the most important factor. This study provides basic data for managing water resources and preventing water pollution in the Niulan River basin. |
| 丁若霞,袁丹妮,王雨路,魏朝军,龚迎春.2024.牛栏江流域浮游动物群落结构特征及驱动因子[J].水生态学杂志,45(5):67-75. |
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