COMPARATIVE DEMOGRAPHY OF 3 SPECIES OF SCLERACTINIAN CORALS USING AGE-DEPENDENT AND SIZE-DEPENDENT CLASSIFICATIONS
COMPARATIVE DEMOGRAPHY OF 3 SPECIES OF SCLERACTINIAN CORALS USING AGE-DEPENDENT AND SIZE-DEPENDENT CLASSIFICATIONS
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DOI：
10.2307/2937107
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发表时间：
1991-09-01
影响因子：
6.1
通讯作者：
BABCOCK, RC
中科院分区：
文献类型：
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作者：
BABCOCK, RC
1982~1984年，在大堡礁中部的两个礁坪上，对三种大型造礁珊瑚：Goniastrea aspera、G.blulus和Platygyra sinensis进行了研究。种群总规模在25至292个群体之间，并保持相对恒定。描述了基于年龄和大小的种群结构和动态。这两种分类之间的差异主要是由于组织分裂或集落缩小所致。在以小班为主的种群中，幼年珊瑚不一定是最多的。同样，由最大类群主导的种群并不总是由最古老的珊瑚主导。在一些种群中，平均群体大小随着年龄的增长而略有下降，尽管大小的变异性也增加了。所有三个物种的死亡模式都是相似的，最年轻的后代和最小的分株的死亡率最高。虽然年龄较大或更大的珊瑚的死亡率较低，但这些群体的部分死亡和分裂的发生率较高。在接近等于5年的生殖年龄时，特定年龄的繁殖力迅速增加，但由于平均群体大小的减少，较高年龄组的繁殖力略有下降。估计平均世代时间从33年到37年不等。
Three species of massive reef-building coral, Goniastrea aspera, G. favulus, and Platygyra sinensis, were studied on two fringing reef flats in the central Great Barrier Reef from 1982 to 1984. Total population sizes ranged from 25 to 292 colonies, and remained relatively constant. Population structures and dynamics based on both age and size were described. Differences between these two classifications were primarily due to tissue fission or shrinkage of colonies. In populations dominated by small size classes, young corals were not necessarily the most abundant. Similarly, populations dominated by the largest size classes were not always dominated by the oldest corals. In several populations, mean colony size decreased slightly with increasing age, though variability in size also increased. Mortality patterns were similar in all three species, with the youngest genets and smallest ramets suffering the highest death rates. While mortality in older or larger corals was low, the incidence of partial mortality and fission was higher in these groups. Age-specific fecundity increased rapidly once reproductive age was reached at almost-equal-to 5 yr, but fecundity decreased slightly in the older age classes due to the decrease in mean colony size. Estimated mean generation times ranged from 33 to 37 yr.