Fadlallah Yusef H
Center for Coastal Marine Studies, University of California, 95064, Santa Cruz, CA, USA.
Oecologia. 1982 Dec;55(3):379-388. doi: 10.1007/BF00376926.
The temperate water coral, Astrangia lajollaensis broadcasts a large number of small eggs. It propagates asexually by budding and regeneration, and forms two-dimensional colonies on hard rocky substrate. Sexual recruitment was absent and asexual propagation was slow during this study. I conclude that budding at the borders of colonies is not slowed by the presence of adjacent space competitors nor is it enhanced by their absence. A model of colony growth is presented and ages of colonies at the study site are predicted. The ecological roles of sexual and asexual reproduction in the kelp forest habitat of A. lajollaensis are discussed. The occurrence of A. lajollaensis population at a study site in Pacific Grove, California extends the northern range for the species. The nearest conspecifics are 200-300 km to the south. Establishment of this northern population probably occurred by settlement of planktonic planulae but the long-term persistence of the population may be possible only by the strategy of asexual propagation and regeneration.
温带水域珊瑚拉霍亚星珊瑚会释放大量小卵。它通过出芽和再生进行无性繁殖，并在坚硬的岩石基质上形成二维群体。在本研究期间，未出现有性补充，无性繁殖缓慢。我得出结论，群体边界处的出芽不会因相邻空间竞争者的存在而减缓，也不会因它们的不存在而增强。本文提出了一个群体生长模型，并预测了研究地点群体的年龄。讨论了拉霍亚星珊瑚在海带森林栖息地中进行有性和无性繁殖的生态作用。拉霍亚星珊瑚种群在加利福尼亚州太平洋格罗夫的一个研究地点出现，扩展了该物种的北部分布范围。最近的同种个体在南方200 - 300公里处。这个北方种群的建立可能是通过浮游浮浪幼虫的定居，但该种群的长期存续可能仅靠无性繁殖和再生策略才有可能。
