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首页> 外文期刊>Estuarine Coastal and Shelf Science >Fine-scale spatial distribution of the common lugworm Arenicola marina, and effects of intertidal clam fishing
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Fine-scale spatial distribution of the common lugworm Arenicola marina, and effects of intertidal clam fishing

机译：普通夜蛾Arenicola码头的精细尺度空间分布以及潮间蛤捕捞的影响

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摘要

Despite its ubiquity and its role as an ecosystem engineer on temperate intertidal mudflats, little is known of the spatial ecology of the lugworm Arenicola marina. We estimated lugworm densities and analyzed the spatial distribution of A. marina on a French Atlantic mudflat subjected to long-term clam digging activities, and compared these to a nearby pristine reference mudflat, using a combination of geostatistical techniques: point-pattern analysis, autocorrelation, and wavelet analysis. Lugworm densities were an order of magnitude greater at the reference site. Although A. marina showed an aggregative spatial distribution at both sites, the characteristics and intensity of aggregation differed markedly between sites. The reference site showed an inhibition process (regular distribution) at distances <7.5 cm, whereas the impacted site showed a random distribution at this scale. At distances from 15 cm to several tens of meters, the spatial distribution of A. marina was clearly aggregated at both sites; however, the autocorrelation strength was much weaker at the impacted site. In addition, the non-impacted site presented multi-scale spatial distribution, which was not evident at the impacted site. The differences observed between the spatial distributions of the fishing-impacted vs. the non-impacted site reflect similar findings for other components of these two mudflat ecosystems, suggesting common community-level responses to prolonged mechanical perturbation: a decrease in naturally-occurring aggregation. This change may have consequences for basic biological characteristics such as reproduction, recruitment, growth, and feeding.
机译：尽管它无处不在并且在温带潮间带滩涂上担任生态系统工程师，但对g虫Arenicola marina的空间生态学知之甚少。我们估计了夜蛾的密度，并分析了经过长期蛤activities挖掘活动的法国大西洋滩涂上的滨海游动藻的空间分布，并使用地统计技术将其与附近的原始参考滩涂进行了比较：点模式分析，自相关和小波分析。在参考点，夜蛾的密度要大一个数量级。尽管滨海假单胞菌在两个位点都显示出聚集的空间分布，但聚集的特征和强度在两个位点之间明显不同。参考部位在小于7.5 cm的距离处显示抑制过程（规则分布），而受影响部位在此范围内显示随机分布。在15厘米至几十米的距离处，两个地点的滨海曲霉的空间分布明显聚集。但是，自相关强度在受影响的位置要弱得多。此外，未受影响的地点呈现多尺度的空间分布，这在受影响的地点并不明显。捕鱼影响区和非影响区的空间分布之间观察到的差异反映了这两个泥滩生态系统其他组成部分的相似发现，表明常见的社区一级对延长的机械扰动的响应：自然发生的聚集的减少。这种变化可能会对基本生物学特性（例如繁殖，募集，生长和觅食）产生影响。

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