Geographic and environmental factors affecting the distribution of kelp beds and barren grounds and changes in biota associated with kelp reduction at sites along the Norwegian coast
Geographic and environmental factors affecting the distribution of kelp beds and barren grounds and changes in biota associated with kelp reduction at sites along the Norwegian coast
复制标题
影响挪威海岸海带床和荒地分布的地理和环境因素以及与海带减少相关的生物群变化
DOI：
10.1139/f97-186
复制
发表时间：
1997
影响因子：
2.4
通讯作者：
K. Sivertsen
中科院分区：
文献类型：
--
作者：
K. Sivertsen
对挪威西海岸和北海岸244个地点进行了调查，以评估海带(Laminaria Hyperborea)底床是否在1981-1992年期间被海胆StrongyLoctrotus droebachisis和Echinus esculentus过度放牧。在避风区和中度海浪暴露区发现了贫瘠的地面群落，主要分布在从诺德莫尔(63°N)向北的内群岛和中部群岛。大型(成虫和中型)海带密度分别为20.7只·m-2和9.7只·m-2。海带幼虫海带床密度为23.9只·m-2，过渡区为3.6只·m-2，荒地为0.0只·m-2，海带收获地为59.1只·m-2。荒地上罗氏针茅的密度和平均大小均向北递减。北极圈南部和北部的平均密度分别为52.2只和26.1只·m-2。多瓦里。
Sites at 244 locations along the west and north Norwegian coasts were investigated to evaluate whether kelp (Laminaria hyperborea) beds had been overgrazed by the sea urchins Strongylocentrotus droebachiensis and Echinus esculentus in the years 1981-1992. Barren ground communities were found in sheltered and moderately wave-exposed areas mainly in the inner and middle archipelago from Nordmore (63°N) northwards. Densities of large-sized (adult and intermediate) L. hyperborea were 20.7 individuals ·m-2 in kelp beds and 9.7 individuals ·m-2 in transition areas. Juvenile Laminaria spp. were present at densities of 23.9 individuals ·m-2 in kelp beds, 3.6 individuals ·m-2 in transition areas, 0.0 individuals ·m-2 in barren grounds, and 59.1 individuals ·m-2 in kelp-harvested locations. Both the densities and the mean size of S. droebachiensis in barren grounds decreased northwards. The mean densities were 52.2 and 26.1 individuals ·m-2 for the areas south and north of the Arctic Circle, respectively. Multivari...