Vertebrate Fauna of North Carolina Coastal Islands. A Study in the Dynamics of Animal Distribution I. Ocracoke Island
Vertebrate Fauna of North Carolina Coastal Islands. A Study in the Dynamics of Animal Distribution I. Ocracoke Island
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北卡罗来纳州沿海岛屿的脊椎动物群。
DOI：
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发表时间：
1942
期刊：
影响因子：
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通讯作者：
William L. Engels
中科院分区：
文献类型：
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作者：
William L. Engels
问题的性质。动物地理学家通常认识到岛屿的两种主要类型，根据不同的起源来区分大陆岛屿和海洋岛屿。大陆岛屿是一块较高的土地，由于陆地沉降或海平面上升而淹没了邻近的低地，从而与大陆隔绝。它的动物群主要是直接继承自其居住地的动物群，而它是母体陆地的一部分。相反，海洋岛屿是从海底诞生的。它在出现时是贫瘠的，但随后通过漂流和漂流到达水面、水上或穿过水面，通常来自相当远的距离和来自各种来源，获得了植物群和动物群。大陆岛屿的动物群通常是平衡且同质的，尽管与大陆相比较为贫乏；海洋岛屿的结构是异质的，因为它的起源不同，而且不同的系统群体的代表性也不成比例。
Nature of problem.?Zoogeographers usually recognize two chief types of islands, distinguishing between mainland islands and oceanic islands on the basis of their differing origins. A mainland island is a piece of higher land which has been cut off from the mainland through submergence of adjacent lowlands as a result either of subsidence of the land or elevation of the sea level. Its fauna is chiefly an inherited one coming directly from that which populated it while it was part of the parent land mass. An oceanic island, contrarily, is born of the sea bottom; it is barren on emergence, but subseqently acquires a flora and a fauna through waifs and drifts arriving over, on, or through the water, often from considerable distances and from a variety of sources. The fauna of a mainland island is usually balanced and homogeneous, although impoverished in comparison with its mainland; that of an oceanic island is heterogeneous, because of its diverse origins, and the various systematic groups are disproportionately represented.