The effect of sieve mesh size on the abundance and composition of macrophyte-associated macrofaunal assemblages
The effect of sieve mesh size on the abundance and composition of macrophyte-associated macrofaunal assemblages
复制标题
筛孔尺寸对大型植物相关大型动物群落丰度和组成的影响
DOI：
10.1023/a:1003589404593
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发表时间：
1998
期刊：
影响因子：
2.6
通讯作者：
F. Leite
中科院分区：
文献类型：
--
作者：
M. O. Tanaka;F. Leite
几个筛网尺寸（2，1，0.5，0.2和0.1毫米）的采样效率进行了测试，在无脊椎动物组合与狭叶马尾藻。在巴西东南部采集了这种褐藻的样本，以确定不同的采样装置是否会导致大型底栖动物的丰度和组成存在差异。与取得类似结果的其他三种筛目尺寸相比，1 mm和2 mm筛目尺寸采样的生物较少，导致丰度、密度、物种数量和多样性较小。最有效的筛子是0.5 mm的筛目，采样率分别为85.8%和94.5%的伽马和caprellidean端足类，和93.1%的腹足类。然而，多毛类和等足类动物最好用0.2 mm筛取样。我们的研究结果表明，在决定使用哪种筛子时应谨慎，因为底栖动物研究中常用的网目尺寸（1和0.5毫米）可能会导致对多样性和丰度以及群落结构模式的非常不同的估计。
Sampling efficiency of several sieve mesh sizes (2, 1, 0.5, 0.2 and 0.1 mm) was tested in invertebrate assemblages associated to Sargassum stenophyllum. Samples of this brown algae were collected in southeastern Brazil to determine whether different sampling devices resulted in differences on the abundance and composition of the macrofauna. The 1 and 2 mm mesh sizes sampled less organisms, resulting in smaller abundances, densities, number of species and diversity, when compared to the other three mesh sizes, that achieved similar results. The most efficient sieve was the 0.5 mm mesh, sampling 85.8% and 94.5% of gammaridean and caprellidean amphipods, respectively, and 93.1% of gastropods. However, polychaetes and isopods were best sampled with the 0.2 mm sieve. Our results suggest that caution should be exercised when deciding on which sieve to use, as mesh sizes commonly used in benthic studies (1 and 0.5 mm) may result in very different estimates of diversity and abundance, as well as community structure patterns.