The Distribution of a Bryozoan on Seagrass Blades: Settlement, Growth, and Mortality
The Distribution of a Bryozoan on Seagrass Blades: Settlement, Growth, and Mortality
复制标题
海草叶片上苔藓虫的分布：定居、生长和死亡
DOI：
--
复制
发表时间：
1986
期刊：
影响因子：
--
通讯作者：
M. Keough
中科院分区：
文献类型：
--
作者：
M. Keough
对墨西哥湾的树状苔藓动物 Bugula neritina 确定了成虫分布受幼虫定居和定居后生长和生存影响的程度。大多数群体生活在海草 Thalassia testudinum 的叶片上。具有繁殖能力的成虫往往发生在叶片的远端（最古老的）部分。定居主要发生在远端部分，但新定居的幼体的分布并不像大群体那样偏向尖端。观察到的沿海草叶片的菌落均匀分布偏差中，沉降所占的比例小于 20%。在人造和天然海草叶片上，菌落分布仅随着菌落大小而逐渐变化，这表明海草生长对观察到的分布贡献不大。通过在三个独立的实验中将新定居的个体移栽到田间来估计幼体的存活率。在定居后的第一周，70% 的人死亡，无论他们的状况如何......
The extent to which the distribution of adults is influenced by larval settlement and post—settlement growth and survival was determined for the arborescent bryozoan Bugula neritina in the Gulf of Mexico. Most colonies live attached to blades of the seagrass Thalassia testudinum. Reproductive adults tended to occur on the distal (oldest) portions of blades. Settlement occurred mostly on the distal sections, but the distribution of newly settled juveniles was not as skewed toward the tips as that of large colonies. Settlement accounted for <20% of the observed deviation from a uniform distribution of colonies along seagrass blades. On both artificial and natural seagrass blades, the distribution of colonies changed only gradually with colony size, suggesting that seagrass growth contributed little to the observed distribution. Juvenile survival was estimated by outplanting newly settled individuals to the field in three separate experiments. In the 1st wk after settlement, °70% died, regardless of their po...