Spatial variability of the surf zone fish and macroinvertebrate community within dissipative sandy beaches in Oregon, USA
Spatial variability of the surf zone fish and macroinvertebrate community within dissipative sandy beaches in Oregon, USA
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DOI：
10.1111/maec.12320
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发表时间：
2016-08
期刊：
影响因子：
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通讯作者：
J. M. Jarrín;Jessica A. Miller
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文献类型：
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作者：
J. M. Jarrín;Jessica A. Miller
生境异质性可以通过提供不同物种可以占据的多样性区域来影响生物群落。桑迪海滩冲浪带通常被认为是同质环境;然而，被水流和波浪移动的沙坝可能产生沟状形状或槽，从而提供异质性。尽管碎波带是幼鱼和大型甲壳类动物的重要栖息地，但由沙运动产生的栖息地异质性的影响尚不清楚。要确定是否，以及如何，鱼类和大型无脊椎动物群落中存在的槽和非槽或平坦地区的俄勒冈州冲浪区不同，我们比较了两个地区的物种组合在三个海滩附近的河口超过2年。与平坦地区相比，海槽有不同的群落，总渔获量较高（平均值±标准差= 123.2 ± 122.1对43.6 ± 44.5个体× 100 m−2），分类群丰富度较高（6.7 ± 2.7对4.0 ± 2.3分类群）;这些差异可能是由于水的流动、猎物的可用性和沉积物的大小。鱼类和大型无脊椎动物群落没有变化，但有显着差异的海滩之间，最明显的社区存在于唯一的海滩附近的河口没有码头在其口，这可能是由于较高的物种之间的运动冲浪区和河口。鱼类和大型甲壳动物冲浪带社区空间变化的海滩内和之间的沙运动提供的栖息地异质性，并可能，邻近栖息地的影响。
Habitat heterogeneity can influence biological communities by providing a diversity of areas that can be occupied by different species. Sandy beach surf zones are often considered homogenous environments; however, sand bars moved by currents and waves can produce trench-like shapes or troughs that provide heterogeneity. The influence of habitat heterogeneity produced by sand movement is unclear despite the fact that surf zones are an important habitat for larval and juvenile fish and macrocrustaceans. To determine if, and how, the fish and macroinvertebrate communities present in trough and non-trough or flat areas of Oregon surf zones differ, we compared species assemblages in both areas at three beaches adjacent to estuary mouths over 2 years. Troughs had different communities compared with flat areas, with higher total catch (mean ± SD = 123.2 ± 122.1 versus 43.6 ± 44.5 individuals × 100 m−2) and taxon richness (6.7 ± 2.7 versus 4.0 ± 2.3 taxa); these differences were potentially due to water movement, prey availability and sediment size. The fish and macroinvertebrate communities did not vary between years but there were significant differences among beaches, with the most distinct community present at the only beach adjacent to an estuary without a jetty at its mouth, which was possibly due to higher species movement between the surf zones and estuary. Fish and macrocrustacean surf zone communities varied spatially within and among beaches in relation to habitat heterogeneity provided by sand movement and, potentially, the influence of adjacent habitats.