黄河口及其邻近水域强壮箭虫密度的时空分布及其与环境因子的关系

刘晓慧; 薛莹; 张崇良; 任一平; 徐宾铎

doi:10.3969/j.issn.0253-4193.2017.06.008

黄河口及其邻近水域强壮箭虫密度的时空分布及其与环境因子的关系

doi: 10.3969/j.issn.0253-4193.2017.06.008

中国海洋大学水产学院, 山东青岛 266003

基金项目: 公益性行业（农业）科研专项经费资助（201303050）。

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出版历程
- 收稿日期: 2016-10-10
- 修回日期: 2017-01-05

Spatio-temporal distribution of density of Sagitta crassa and its relationship with environmental factors in the Yellow River Estuary and its adjacent waters

College of Fisheries, Ocean University of China, Qingdao 266003, China

摘要

摘要: 为探究强壮箭虫（Sagitta crassa）在黄河口及其邻近水域的时空分布特征及其与生物和非生物环境等因子的关系，本文依据2013—2014年在黄河口及其邻近水域6个航次的调查数据，采用丛生指标（I）、聚块性指标（A）和负二项分布参数的倒数（C_A）等聚集指标，分析了强壮箭虫的空间分布特征；应用广义可加模型（GAM）研究了强壮箭虫密度的时空分布和环境因子的关系。结果表明，黄河口及其邻近水域强壮箭虫平均密度为21.85 ind/m³，春、秋季高，冬、夏季低；其密度的空间分布以黄河入海口附近水域为密集中心，向远岸水域逐渐降低；强壮箭虫在黄河口及其邻近水域的聚集特征随密度的变化存在两次聚集和两次扩散；水深、表层水温和浮游桡足类密度是影响其密度时空分布的主要因子，总偏差解释率为55.11%，强壮箭虫密度随水深的增加而减小，随表层水温的升高先增加后减小，随桡足类密度的增加而增加。强壮箭虫密度受黄河口及其邻近水域环境因子变动的影响，具有明显的季节变化和空间分布规律。
- 黄河口 /
- 强壮箭虫 /
- 聚集指标 /
- 广义可加模型
Abstract: The aim of this study was to investigate the spatio-temporal distribution of Sagitta crassa density and its relationship with environmental factors in the Yellow River estuary and its adjacent waters. The spatial distribution pattern of S. crassa was analyzed by several indices of aggregated intensity based on the data collected in six cruises in 2013 and 2014, and the spatio-temporal distributions of S. crassa density in relation to environmental factors was revealed by generalized additive model (GAM). The results showed that the spatial distribution of S. crassa was in twice aggregation and twice spread, the density of S. crassa was relatively high in the estuary area and low in the offshore waters. The average monthly density of S. crassa was 21.85 ind/m³, and the density in spring and autumn was larger than those in winter and summer. GAM analysis indicated that depth, SST and density of Copepoda were the main affecting factors, which accounted for 55.11% of the residual deviance. The density of S. crassa decreased with the increase of depth, and rose with the increase of Copepoda density, and increased at first then decreased later with the SST increasing in the Yellow River Estuary. The overall results revealed an obvious seasonal variation and regular spatial pattern of S. crassa distribution in the Yellow River Estuary and its adjacent waters, which would contribute a better understanding of the effects of environment on zooplankton, providing useful information for further studies on Chaetognatha.
- Yellow River Estuary /
- Sagitta crassa /
- index of aggregated intensity /
- generalized additive model (GAM)

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