Differences among assemblages of fish associated with Zostera capricorni and bare sand over a large spatial scale
Differences among assemblages of fish associated with Zostera capricorni and bare sand over a large spatial scale
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摩羯座大叶藻和裸沙鱼类组合在大空间尺度上的差异
DOI：
10.3354/meps072015
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发表时间：
1991
影响因子：
2.5
通讯作者：
J. Bell
中科院分区：
文献类型：
--
作者：
D. Ferrell;J. Bell
这项研究解决了这样一个问题：“海草在大的空间尺度上是否比裸沙支持更大的鱼类多样性和丰富度？”答案因描述鱼类聚集的尺度和沙子与海草的距离而异。在89%的地点，从大叶藻中收集的物种明显多于从距离该海草至少100米的沙子中收集的物种。在58 O/O的位置，Zostera也包含了更多的物种比沙子在10米的海草。当从分析中排除2种具有非常斑块分布的物种时，在66%的位置处，大叶藻比> 100 m的沙地拥有更多的鱼类个体。然而，大叶藻并不总是比海草10米范围内的沙子含有更多的鱼个体：大叶藻在25%的位置有更多的鱼，相邻的沙子在25%的位置有更多的鱼，其余的比较没有差异。大多数常见的物种主要在大叶藻或邻近的沙子中发现。3种生境的物种相对多度差异显著，但大叶藻与相邻沙地的物种相对多度相似性大于100 m外沙地。我们的结论是：（1）大叶藻支持更多的物种和个体，和不同的物种，比沙子> 100米的海草在大多数位置，和（2）的鱼类组合与沙子在10米的大叶藻有较少的，和dfreent，物种比海草在大多数位置，但支持一样多的个体鱼作为大叶藻。
This study addressed the question 'Does seagrass support a greater diversity and abundance of fish than bare sand over a large spatial scale?' The answer varied with both the measure used to describe the assemblages of fish, and the distance sand was from seagrass. Significantly more species were collected from Zostera capricomi than from sand at least 100 m from this seagrass in 89 % of locations. At 58 O/O of locations, Zostera also contained more species than sand within 10 m of the seagrass. When 2 species with very patchy distributions were excluded from analyses, Zostera held sigllificantly more fish individuals than sand > 100 m away at 66 % of locations. However, Zostera did not consistently contain more fish individuals than sand within 10 m of seagrass: Zostera had significantly more fish In 25 % of locations, adjacent sand had more fish in 25 % of locations and there were no differences in the remaining comparisons. Most of the common species were found predominantly in Zostera or the adjacent sand. There were prominent dissimilarities in relative abundance of species in samples from the 3 habitats, although samples from Zostera were more similar to those from adjacent sand than to those from sand > 100 m away. We conclude that (1) Zostera supported more species and individuals, and different species, than sand > 100 m from seagrass at a majonty of locations, and (2) the fish assemblage associated with sand within 10 m of Zostera had fewer, and ddferent, species than the seagrass at a majority of locations but supported as many individual fish as Zostera.