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首页> 外文期刊>Estuarine Coastal and Shelf Science >Recovery Of The Biogenic Nest Habitat Of Limaria Hians (mollusca: Limacea) Following Anthropogenic Disturbance
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Recovery Of The Biogenic Nest Habitat Of Limaria Hians (mollusca: Limacea) Following Anthropogenic Disturbance

机译：人为干扰后利马里亚斯人（mollusca：Limacea）生物巢栖息地的恢复

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摘要

The rate of regrowth of Limaria hians nest material, following a simulated dredging impact, was examined on an extensive L hians bed off the west coast of Scotland. Within an area of complete coverage of the sea bed by a turf of L. hians nest material, the turf was cleared by diver from 10× 0.25 m~2 plots and the sediment subsequently raked to simulate the passage of a scallop dredge. The areal extent and pattern of nest regrowth were recorded after 6 and 12 months. Control plots showed no significant change in 100% nest cover over the year. In the treated plots regrowth generally occurred from extension of peripheral nest material. Over the initial 6 autumn and winter months treatment plots displayed a mean regrowth of 9.2% of the cleared area, increasing to 15% in the second 6-month spring and summer period. However, no significant difference in growth was found between these periods. After 12 months half the treatment plots exhibited <25% nest cover and none of them contained nest of a thickness comparable to the surrounding bed. Conversion of regrowth rates within the treated plots to the rate of nest advance along a linear front, gave a value of 3.2 cm per year, highlighting the susceptibility of this species-rich biotope to scallop dredging.
机译：在模拟的疏ging作用之后，在苏格兰西海岸附近的广阔Lians床上检查了Limaria hian巢材料的再生速率。在由L. hians巢物质草皮完全覆盖海床的区域内，草皮被潜水员从10×0.25 m〜2的地块清除，随后倾斜沉积物以模拟扇贝挖泥船的通过。分别在6个月和12个月后记录巢的面积和范围。对照样地显示，一年中100％的巢盖没有明显变化。在处理过的地块中，再生长通常是由于外围巢物质的延伸而引起的。在最初的秋季和冬季的六个月中，处理区的平均再生长面积为净空地的9.2％，在第二个六个月的春季和夏季期间增加到15％。然而，在这两个时期之间没有发现增长的显着差异。 12个月后，一半的处理地块表现出<25％的巢覆盖率，并且没有一个巢的厚度与周围的床相当。处理后的地块内的再生长率到沿线性前沿的巢前进率的转换，得出的值为每年3.2厘米，这突出说明了这种物种丰富的生物群落对扇贝疏ed的敏感性。

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