Planktonic larval mortality rates are lower than widely expected
Planktonic larval mortality rates are lower than widely expected
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浮游幼虫死亡率低于普遍预期
DOI：
10.1890/13-2248.1
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发表时间：
2014
期刊：
影响因子：
4.8
通讯作者：
J. Fisher
中科院分区：
文献类型：
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作者：
J. White;S. Morgan;J. Fisher
对典型海洋生命周期的浮游阶段死亡率的基本了解，对于了解种群动态和管理海洋资源至关重要。然而，估计幼虫的死亡率是极具挑战性的，因为显微镜下的幼虫在洋流中发育数周后，其命运无法追踪。我们使用了一种双管齐下的方法来提供可靠的估计幼虫死亡率：（1）频繁，长期的采样，其中幼虫的行为和再循环的组合大大减少了幼虫运输到研究区域和从研究区域，和（2）一个改进的方法计算幼虫死亡率，包括一个垂直生命表与负二项分布占臭名昭著的斑块浮游生物。我们的研究物种（藤壶和螃蟹）的幼虫死亡率≤0.14幼虫/天，这比通常确定的海洋幼虫的存活率高出一个数量级。这些估计是可靠的，因为它们是类似的S…
Fundamental knowledge of mortality during the planktonic phase of the typical marine life cycle is essential to understanding population dynamics and managing marine resources. However, estimating larval mortality is extremely challenging, because the fate of microscopic larvae cannot be tracked as they develop for weeks in ocean currents. We used a two-pronged approach to provide reliable estimates of larval mortality: (1) frequent, long-term sampling where the combination of larval behaviors and recirculation greatly reduces larval transport to and from the study area, and (2) an improved method of calculating larval mortality that consists of a vertical life table with a negative binomial distribution to account for the notorious patchiness of plankton. Larval mortality rates of our study species (barnacles and crabs) were ≤0.14 larvae/d, which produce survivorships over an order of magnitude higher than commonly determined for marine larvae. These estimates are reliable because they were similar for s...