Intertidal barnacle distribution : a case study using multiple working hypotheses
Intertidal barnacle distribution : a case study using multiple working hypotheses
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潮间带藤壶分布：使用多种工作假设的案例研究
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
E. Bourget
中科院分区：
文献类型：
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作者：
G. Miron;Bernard Boudreau;E. Bourget
在加拿大新不伦瑞克省帕萨马科迪湾同时研究了幼虫供应、栖息地选择、空间可用性、幼虫生理状况和定居后早期死亡率在确定藤壶 Semibalanus balanoides (L.) 垂直分布模式中的作用。泵样本和沉降调查表明，约60%的浮游鲤鱼是在1.5至4.0 m深度处采集的，而超过90%的新定居鲤鱼栖息在潮间带的低水位。使用先前放置以获得各种附生生物梯度的预定殖木板研究了鲤鱼对栖息地的选择和定居模式。这些木板预先定居在潮间带的低、中、高水位，并放置在不同的方向，导致新定居的鲤鱼的分布发生变化。例如，与保持相同方向、相同高度的表面相比，倒置的垂直木板在低潮间带水平处的定居者较少。当水平放置在同一水平面时，预定植在低潮间带水平的部分比最初放置在高潮间带和中潮间带水平的部分收集更多的幼虫。我们使用三酰甘油/胆固醇比率（TAG/CHOL）作为浮游和新定居的鲤鱼以及新变态的卵的生理状况的测量。浮游鲤鱼的 TAG/CHOL 比率在采样期间下降，但随水体位置的变化没有变化。对于新定居的鲤鱼和新变态的卵，TAG/CHOL 比率随着潮间带水位的降低而增加。与未清除的对照相比，没有同种成虫的象限被更多的鲤鱼定殖。未清理的样方的早期定居后死亡率高于已清理的样方，但这种影响随潮间带水位的不同而变化。在已清理的样方中，早期定居后死亡率随着潮间带水位的增加而增加，而在未清理的对照中，死亡率没有显着变化。本研究表明，S, balanoides 在海岸上的垂直分布是由涉及幼体供应、栖息地选择、空间可用性和定居后早期死亡率的复杂关系造成的。我们还首次提出了S. balanoides 幼虫生理状况与早期垂直分布之间相关性的证据。
The roles of larval supply, selection of habitat, availability of space, larval physiological condition, and early post-settlement mortality in determining vertical distribution patterns of the barnacle Semibalanus balanoides (L.) were simultaneously examined in Passamaquoddy Bay, New Brunswick, Canada. Pump samples and settlement surveys showed that about 60% of planktonic cyprids were collected from 1.5 to 4.0 m depth, while over 90% of newly settled cyprids colonized low intertidal levels. Selection of habitat by cyprids and patterns of settlement were studied using precolonized planks that had been previously placed to obtain various periphyton gradients. These planks precolonized at the low, mid-, and high intertidal levels and placed in different orientations, induced variations in the distribution of newly settled cyprids. For example, vertical planks turned upside down had fewer settlers at low intertidal levels compared to surfaces maintained in the same orientation at the same level. When placed horizontally at the same level, sections precolonized at the low intertidal level collected more larvae than sections initially placed at the high and mid-intertidal levels. We used the triacylglycerol/cholesterol ratio (TAG/CHOL) as a measure of physiological condition in planktonic and newly settled cyprids, and newly metamorphosed spat. The TAG/CHOL ratio in planktonic cyprids decreased over the sampling period, but there was no variability with position in the water column. For newly settled cyprids and newly metamorphosed spat, the TAG/CHOL ratio increased with decreasing intertidal level. Quadrats freed of conspecific adults were colonized by more cyprids than were uncleared controls. Early post-settlement mortality was greater in uncleared than in cleared quadrats, but this effect varied with intertidal level. Early post-settlement mortality increased with increasing intertidal level in cleared quadrats, while it did not significantly vary in uncleared controls. The present study shows that the vertical distribution of S, balanoides on the shore results from a complex relationship involving larval supply, selection of habitat, availability of space, and early post-settlement mortality. We also present the first evidence of correlations between larval physiological condition and early vertical distribution in S. balanoides.