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首页> 外文期刊>Estuarine Coastal and Shelf Science >Fish communities of a disturbed mangrove wetland and an adjacent tidal river in Palmar, Ecuador
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Fish communities of a disturbed mangrove wetland and an adjacent tidal river in Palmar, Ecuador

机译：厄瓜多尔帕尔玛受干扰的红树林湿地和邻近的潮汐河的鱼类群落

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摘要

Coastal Ecuador has lost 20—30% of mangrove wetlands over the past 30 years. Such habitat loss can impair the ecological functions of wetlands. A paucity of information exists concerning mangrove fish communities of Ecuador. In this study we identify the fish community of the remaining mangrove wetland in Palmar, Ecuador. Fish were sampled in the dry season of 2003 and the wet season of 2004 by seining in mangrove creeks and Main channel of Rio Palmar. For comparison, an adjacent tidal river without mangroves, Rio Javita, was also sampled. We collected a total of 12,231 individuals comprising 36 species in 16 families from Rios Palmar and Javita. Gobiidae (7 species) was the most diverse family for mangrove sites followed by Gerreidae (5 species) and Engraulidae (4 species). A total of 34 species were collected in the mangrove wetland, 21 of which were exclusive to the mangroves including three species of juvenile snook (Centropomidae), indicating that the mangrove habitat of Palmar may provide nursery habitat for these economically valued species. In Rio Javita, Carangidae (3 species) was the most diverse family followed by Engraulidae and Gerreidae (2 species each). A total of 14 species were collected in the tidal river, only two of which were exclusive to the river. Multivariate analyses of fish community data indicated significant differences in community composition between the mangrove creeks and the tidal river and between seasons in both. Juvenile white mullet, Mugil curema, were collected in high relative abundance in both Rios Palmar and Javita, as was the tropical silverside Atherinella serrivomer an ecologically important species. Although Rios Palmar and Javita are characterized by relatively low fish species richness compared to other tropical estuarine systems, they appear to provide an important habitat for several economically and ecologically valued species.
机译：在过去的30年中，厄瓜多尔沿海地区失去了20％至30％的红树林湿地。这种生境的丧失会损害湿地的生态功能。关于厄瓜多尔的红树林鱼类群落的信息很少。在这项研究中，我们确定了厄瓜多尔帕尔玛剩余的红树林湿地的鱼类群落。在2003年的旱季和2004年的雨季中，通过在红树林小河和里奥帕尔马主河道围网捕鱼对鱼进行了采样。为了进行比较，还对相邻的没有红树林的潮汐河里约哈维塔河进行了采样。我们收集了来自Rios Palmar和Javita的16个科的12,231个个体，其中包括36种。戈壁科（7种）是红树林地带中种类最多的科，其次是Gerreidae（5种）和Engraulidae（4种）。在红树林湿地中共收集到34种，其中21种是红树林所独有的，其中包括3种少年斯诺克（Centropomidae），这表明Palmar的红树林栖息地可以为这些具有经济价值的物种提供苗圃栖息地。在Rio Javita，Carangidae（3种）是最多样化的科，其次是Engraulidae和Gerreidae（各2种）。在潮汐河中总共收集了14种，其中只有2种是该河专有的。对鱼类群落数据的多变量分析表明，红树林小溪和潮汐河之间以及两个季节之间的群落组成存在显着差异。在里奥斯·帕尔马和贾维塔都以相对较高的丰度捕捞了少年白鱼，以及在生态上很重要的热带银side Atherinella serrivomer。尽管与其他热带河口系统相比，Rios Palmar和Javita的鱼类物种丰富度相对较低，但它们似乎为几种具有经济和生态价值的物种提供了重要的栖息地。

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