Subtidal populations of the blue mussel Mytilus edulis as key determinants of waterfowl flocks in the southeastern Barents Sea
Subtidal populations of the blue mussel Mytilus edulis as key determinants of waterfowl flocks in the southeastern Barents Sea
复制标题
蓝贻贝潮下种群数量是巴伦支海东南部水禽群的关键决定因素
作者：
A. A. Sukhotin;A. A. Sukhotin;Y. Krasnov;K. Galaktionov
20世纪90年代在伯朝拉海（巴伦支海的东南部）进行的鸟类调查显示，欧洲北部最大的非筑巢的海鸭群。特别是密集的水禽集群不断观察到在浅水区附近的Dolgij岛在蜕皮期间和迁移到越冬的地方。所有聚集在那里的海洋鸭子都是专门的底栖动物，主要以贻贝为主食。与此同时，以前在伯朝拉海进行的许多底栖生物研究没有发现Dolgij岛附近的贻贝，那里的底栖生物量略低于邻近地区（Denisenko in Mar Ecol Prog Ser 258：109-123）。2003年），这使得这些丰富的鸟群的食物来源成了一个谜。在2007年夏天的一次考察中，我们发现了潮下带的M。在Dolgij岛西南方的浅水区的edulis。这些种群局限于沿海地区，其特点是高度间断分布，生物量高达4公斤/平方米。我们描述这些潮下带人口以及潮间带贻贝人口的Dolgij岛的西部海岸。
Ornithological surveys conducted over the Pechora Sea (the southeastern part of the Barents Sea) in the 1990 s revealed huge non-nesting flocks of marine ducks, the largest in the European North. Especially dense waterfowl aggregations are constantly observed at the shallows near Dolgij Island during molting period and migration to wintering places. All the marine ducks flocking there are specialized benthos feeders predominantly consuming mussels Mytilus edulis. At the same time, numerous previous benthic studies in the Pechora Sea did not reveal mussels near Dolgij Island where benthic biomass was somewhat lower than in the adjacent areas (Denisenko in Mar Ecol Prog Ser 258:109–123. 2003) which left the food source for these abundant bird flocks enigmatic. In the course of an expedition in summer 2007 we found subtidal populations of M. edulis in shallows to the southwest of Dolgij Island. These populations were confined to a coastal zone and were characterized by a highly disjunct distribution with the biomass reaching up to 4 kg m−2. We describe these subtidal populations as well as an intertidal mussel population on the western shore of Dolgij Island.