Prevalence of ontogenetic changes in colour brightness among benthic invertebrates and their association with microhabitat shifts
Prevalence of ontogenetic changes in colour brightness among benthic invertebrates and their association with microhabitat shifts
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DOI：
10.3354/meps10626
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发表时间：
2014-01-01
影响因子：
2.5
通讯作者：
Gosselin, Louis A.
中科院分区：
文献类型：
--
作者：
de Bruyn, Rolena A. J.;Gosselin, Louis A.
本研究对15种潮间带无脊椎动物进行了研究，以确定体色亮度的个体发生变化的前价，饮食和阳光对体色的影响，以及亮度变化与微生境利用之间的关系。大多数物种在亮度或色素沉着方面没有发生实质性的变化。在15个物种中，有11个物种的图像分析软件可以检测到一定程度的变化，但只有6个物种出现了足以被人类观察者检测到的亮度变化，只有3个物种的色素变化明显。在一项对照实验中，发现孵化的珍珠螺（Nucella ostrina）的壳亮度和色素具有表型可塑性，会随着阳光的照射而改变，而不会因贻贝或藤壶的饮食而改变。亮度的个体发生变化不受系统发育的限制，发生在我们研究的3门动物中（软体动物、环节动物和节肢动物）。在个体发育过程中，所有从隐蔽微生境转向暴露微生境的物种都发生了亮度和色素沉着向越来越深的外壳或外骨骼的转变；在3种可获得该信息的物种中，发生颜色亮度变化的大小与微生境变化的大小密切匹配。然而，在微生境部分转移或没有微生境转移的活动物种中，亮度的个体发生变化很少或没有。因此，颜色变化的个体发生时间可以作为生命在生态上不同阶段之间过渡的标志。
This study examined 15 species of intertidal invertebrates to determine the pre valence of ontogenetic changes in body colour brightness, the influence of diet and sunlight on body colouration, and the relationship between shifts in brightness and in microhabitat use. Most species did not undergo substantial changes in brightness or pigmentation. Some degree of change could be detected by image analysis software in 11 of the 15 species, but changes in brightness sufficient to be detected by a human observer occurred in only 6 species, and changes in pigmentation were apparent in only 3 species. In a controlled experiment, shell brightness and pigmentation of hatchings of the snail Nucella ostrina were found to be phenotypically plastic, changing in response to exposure to sunlight but not to diets of mussels or barnacles. Ontogenetic shifts in brightness were not phylogenetically constrained, occurring in the 3 phyla represented in our study (Mollusca, Annelida, Arthropoda). Shifts in brightness and pigmentation to increasingly darker shells or exoskeletons were found to occur in all species that shifted from cryptic to exposed microhabitats during ontogeny; the size at which colour brightness shift occurs is closely matched with the size at which microhabitat shift occurs in 3 species for which such information is available. However, little or no ontogenetic shift in brightness was detected in motile species with partial or no microhabitat shift. The ontogenetic timing of colour shifts may therefore serve as a marker of a transition between ecologically distinct phases of life.