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首页> 外文期刊>Estuarine Coastal and Shelf Science >Zooplankton variability in the subtropical estuarine system of Paranagua Bay, Brazil, in 2012 and 2013
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Zooplankton variability in the subtropical estuarine system of Paranagua Bay, Brazil, in 2012 and 2013

机译：2012年和2013年巴西巴拉那瓜湾亚热带河口系统中的浮游动物变异性

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摘要

Spatial and temporal dynamics of zooplankton assemblages were studied in the Paranagua Estuarine System (southern Brazil), including data from the summer (rainy) and winter (dry) periods of 2012 and 2013. Zooplankton and environmental data were collected at 37 stations along the estuary and examined by multivariate methods. The results indicated significantly distinct assemblages; differences in abundance were the major source of variability, mainly over the temporal scale. The highest abundances were observed during rainy periods, especially in 2012, when the mean density reached 16378 ind.m(-3). Winter assemblages showed lower densities but higher species diversity, due to the more extensive intrusion of coastal waters. Of the 14 taxonomic groups recorded, Copepoda was the most abundant and diverse (92% of total abundance and 22 species identified). The coastal copepods Acartia lilljeborgi (44%) and Oithona hebes (26%) were the most important species in both abundance and frequency, followed by the estuarine Pseudodiaptomus acutus and the neritic Temora turbinata. The results indicated strong influences of environmental parameters on the community structure, especially in response to seasonal variations. The spatial distribution of species was probably determined mainly by their preferences and tolerances for specific salinity conditions. On the other hand, the abundances were strongly related to higher water temperature and precipitation rates, which can drive nutrient inputs and consequently food supply in the system, due to intense continental drainage. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在巴拉那瓜河口系统（巴西南部）研究了浮游动物组合的时空动态，包括2012年和2013年夏季（多雨）和冬季（干旱）期间的数据。在沿河口的37个站点收集了浮游动物和环境数据并通过多变量方法进行了检验。结果表明组装明显不同。丰度差异是变异的主要来源，主要是在时间尺度上。在雨季观测到最高的丰度，尤其是在2012年，那时平均密度达到了16378 ind.m（-3）。由于沿海水域的入侵更加广泛，冬季集合体的密度较低，但物种多样性较高。在记录的14个分类学类别中，Co足类是最丰富和多样的（占总丰度的92％，鉴定出22个物种）。沿海co足纲A螨（Acartia lilljeborgi）（44％）和Oithona hebes（26％）在丰度和频率上都是最重要的物种，其次是河口假单胞假单胞菌（Pseudodiaptomus acutus）和尖锐湿疣（Temora turbinata）。结果表明，环境参数对群落结构的影响很大，尤其是对季节变化的响应。物种的空间分布可能主要取决于它们对特定盐度条件的偏好和耐受性。另一方面，丰度与较高的水温和降水速率密切相关，由于强烈的大陆性排水，水温和降水量的增加可以驱动系统中的养分输入并因此推动食物供应。 （C）2017 Elsevier Ltd.保留所有权利。

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