Dissipative Beaches and Macrofauna Communities on Exposed Intertidal Sands
Dissipative Beaches and Macrofauna Communities on Exposed Intertidal Sands
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裸露潮间沙上的耗散海滩和大型动物群落
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
A. Mclachlan
中科院分区：
文献类型：
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作者：
A. Mclachlan
进行这项研究主要是为了检验以下假设：（1）暴露的桑迪海滩的潮间带动物群占据四个不同的区域;（2）耗散（平坦）海滩支持高丰度和多样性的动物群。对俄勒冈州沿海3个高能耗散海滩的大型底栖动物进行了定量调查，结果表明，每个海滩每米有16-21种，个体数为50-290 × 10 9。该动物群具有明显的分带性，每带有3-4个特征种。分区出现在低潮和潮汐水平或淹没时间的沙子中的间隙水分水平有关。这些数据以及类似的数据，从一系列的海滩在南部非洲和澳大利亚西部进行了分析，在动物多样性，总丰度和生物量和平均个体质量的变化，以响应物理变化的沙粒大小，波高，海滩坡度和海滩类型。生物学参数与各物理参数均表现出较好的相关性，但海滩坡度和海滩类型对丰度和多样性的拟合效果最好。然而，生物量与波能的相关性最好。这被解释为意味着（1）可以控制碎波带生产力和食物可用性的波浪能，控制潮间带生物量和（2）尽管沙粒大小和波浪气候可能具有一些直接影响，但在海滩上发育的动物类型主要由海滩表面的总冲流“气候”决定，如海滩坡度和海滩类型所反映的。
This study was undertaken primarily to test the hypotheses that (I) the intertidal fauna of exposed sandy beaches occupy four distinct zones and (2) that dissipative (flat) beaches support faunas of high abundance and diversity. The benthic macrofauna of three high energy, dissipative beaches on the Oregon coast was quantitatively surveyed and found to comprise an assemblage of 16-21 species and 50-290*10 9 individuals per meter per beach. This fauna exhibited zonation four zones being distinguished by 3-4 characteristic species each. Zonation appeared to be related to both interstitial moisture levels in the sand at low tide and tide levels or inundation times. These data together with similar data from a range of beaches in southern Africa and western Australia were analyzed for changes in faunal diversity, total abundance and biomass and mean individual mass in response to physical changes in sand particle size, wave height, beach slope and beach type. The biological parameters showed good correlations with all the physical parameters, but beach slope and type gave the best fits for abundance and diversity. Biomass was however best correlated with wave energy. This is interpreted as meaning (l) that wave energy which may control surf zone productivity and food availability, controls intertidal biomass and (2) that although sand particle size and wave climate may have some direct effects the type of fauna developing on a beach is primarily determined by the total swash "climate" of the beach face as reflected in beach slope and beach type.