Distribution of Calanus populations in a glaciated fjord in the Arctic (Hornsund, Spitsbergen)—the interplay between biological and physical factors
Distribution of Calanus populations in a glaciated fjord in the Arctic (Hornsund, Spitsbergen)—the interplay between biological and physical factors
复制标题
北极冰川峡湾（霍恩松德、斯匹次卑尔根）的哲水蚤种群分布——生物和物理因素之间的相互作用
作者：
A. Weydmann;S. Kwaśniewski
2001年夏季，对斯匹次卑尔根岛西南海岸霍恩松德峡湾哲水蚤属桡足类的分布和多样性进行了调查。Bhattacharya方法用于根据其前体长度按物种对个体进行分类。所建立的前体长度边界值的哲水蚤copepodid阶段与定义的哲水蚤种从Kongsfjorden（斯匹次卑尔根群岛西北海岸）。在主要的和内部峡湾盆地的优势物种是哲水蚤glacialis，而哲水蚤finmarchicus是霍恩松德以外的优势物种。这两个物种的较年轻的桡足类阶段（CI-CIII）集中在表层水（0-50 - 70米），而准备越冬的较老的桡足类（CIV-CVI雌性）留在深层（50 - 70米到底部）。哲水蚤hyperboreus是目前在低的数字，主要是作为CIV，并在霍恩松深水层。哲水蚤物种的分布和多样性符合这样一种观点，即霍恩松德的海洋动物群比斯匹次卑尔根西海岸以北260公里处的Kongsfjorden更具北极特征。
The distribution and diversity of copepods of the genus Calanus were investigated in Hornsund Fjord (on the southwest coast of Spitsbergen) in summer 2001. The Bhattacharya method was used to sort individuals by species based on their prosome length. The established prosome length boundary values for the Calanus copepodid stages coincided with those defined for the Calanus species from Kongsfjorden (on the northwest coast of Spitsbergen). The predominant species in the main and inner fjord basins was Calanus glacialis, whereas Calanus finmarchicus was the prevailing species outside Hornsund. Younger copepodid stages (CI–CIII) of both species concentrated in the surface water layers (0–50∼70 m), while older copepodids (CIV–CVI females) that were ready for wintering stayed in deep layers (50∼70 m to bottom). Calanus hyperboreus was present in low numbers, predominantly as CIV, and in Hornsund deep water layers. The distribution and diversity of Calanus species complied with the notion that the marine fauna in Hornsund is of a more Arctic character than in Kongsfjorden, a fjord 260 km to the north on the west coast of Spitsbergen.