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首页> 外文期刊>Helgoland marine research >Hard rock versus soft bottom:the fauna associated with intertidal mussel beds on hard bottoms along the coast of chile,and considerations on the functional role of mussel beds
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Hard rock versus soft bottom:the fauna associated with intertidal mussel beds on hard bottoms along the coast of chile,and considerations on the functional role of mussel beds

机译：硬岩与软底：与智利沿海硬底潮间带贻贝床有关的动物区系，并考虑贻贝床的功能

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The fauna associated with hard bottom mussel beds along the exposed Pacific coast of Chile was examined.The abundance of adult (>10 mm body length)purple musels Perumytilus purpuratus varied between 32 and 75 individuals per 50 cm~2,and their biomass between 4.8 and 8.6 g AFDW per 50 cm~2 at eight sampling sites between Arica and Chiloe.At all sampling sites,the associated fauna was dominated by suspension-feeding organisms followed by grazing peracarids and gastropods.Predators and scavengers also reached high abundances while deposit-and detritus-feeding organisms were of minor importance.The majority of organisms associated wiht these hard bottom mussel beds feed on resources obtained from the water column or growing on the mussels rather than on materials deposited with mussel beds on soft bottoms,which comprises many species feeding on material accumulated by mussels and deposited within the mussels bed.Many of the organisms dwelling between mussels bot on hard bottoms and on soft bottoms have direct development,but organisms with pelagic development also occur abundantly within mussel beds.We propose tat species with direct development are disproportionately favoured by the structurally complex habitat with diverse inerstitial spaces between the mussels,which provides ample shelter for small organisms.We conclude that mussels on hard-bottoms primarily porvide substratumfor associated fauna while mussels on soft bottoms provide both substratum and food resources.
机译：检查了智利裸露的太平洋沿岸硬底贻贝床相关的动物区系。成年（体长大于10毫米）的紫色小麝鼠每50 cm〜2紫Peru虫数量在32至75个人之间，生物量在4.8之间在Arica和Chiloe之间的八个采样点，每50 cm〜2有8.6 g AFDW。在所有采样点，相关动物区系以悬浮饲料为生，随后是草食过孔aca和腹足类动物。捕食者和清除剂也达到了高丰度，而沉积物与这些硬底贻贝床有关的大多数生物都以从水柱获得的资源或在贻贝上生长的资源为食，而不是以在软底层上沉积贻贝床的物质为食捕食贻贝积聚并沉积在贻贝床内的物质。许多生物栖息在硬底和软底贻贝之间。底部具有直接发育，但具有贻贝上层发育的生物也大量存在于贻贝河床中。我们认为，具有直接发育的达特种不成比例地受到结构复杂的栖息地的青睐，贻贝之间具有多种惰性空间，为小型生物提供了充足的庇护所。硬底贻贝主要繁殖相关动物的底层，而软底贻贝则提供底层和食物资源。

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