INTERDECADAL VARIATION IN AN ANTARCTIC SPONGE AND ITS PREDATORS FROM OCEANOGRAPHIC CLIMATE SHIFTS
INTERDECADAL VARIATION IN AN ANTARCTIC SPONGE AND ITS PREDATORS FROM OCEANOGRAPHIC CLIMATE SHIFTS
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DOI：
10.1126/science.245.4925.1484
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发表时间：
1989-09-29
期刊：
影响因子：
56.9
通讯作者：
DAYTON, PK
中科院分区：
文献类型：
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作者：
DAYTON, PK
在20世纪60年代，南极洲麦默多站有大量的锚冰形成，深度达30米。在此期间，海绵Homaxinella balfourensis是罕见的，因为它的捕食者在该深度区。现有的海绵大多被锚冰杀死。在20世纪70年代，锚冰的形成减少，并有一个大规模的招聘Homaxinella，其中覆盖了多达80%的底层在该地区。许多掠食者出现，但没有控制海绵人口，它继续增长，通过这十年。20世纪80年代初的特点是冰的形成，几乎所有的Homaxinella都被消灭了，留下了一个数量级的捕食者在该地区。年代际增加的锚冰可能是由于当地极冷的深水涌上，可能是在响应区域电流的强度变化。
During the 1960s there was extensive formation of anchor ice to depths of 30 meters at McMurdo Station, Antarctica. During this period the sponge Homaxinella balfourensis was rare, as were its predators in that depth zone. Most of the existing sponges were killed by anchor ice. During the 1970s, anchor ice formation was reduced, and there was a massive recruitment of Homaxinella, which covered as much as 80 percent of the substrata in that zone. Many predators appeared but did not control the sponge population, and it continued to grow through that decade. The early 1980s were characterized by ice formation and almost all of the Homaxinella were eliminated, leaving an order of magnitude more predators in that zone. The interdecadal increases in anchor ice probably result from local upwelling of extremely cold deep water, possibly in response to shifts in the strengths of regional currents.