细粒空间尺度上的表型可塑性:巴塔哥尼亚岩盐沼泽上的烤贻贝

IF 0.8 4区 生物学 Q4 MARINE & FRESHWATER BIOLOGY Scientia Marina Pub Date : 2020-12-11 DOI:10.3989/scimar.05040.16a
Yamila González Giorgis, María Cruz Sueiro, F. Márquez
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引用次数: 0

摘要

在当前环境变化日益加快的背景下,了解物种在不同空间尺度上的表型可塑性至关重要。通过这些知识,有可能预测它们在面对新的环境条件(如气候变化)时适应和/或进化的潜力,和/或了解它们的生态范围扩大。在巴塔哥尼亚的岩盐沼泽中,最丰富的无脊椎动物物种之一是烤贻贝。在这个系统中,这种贻贝可以在植被斑块和非植被斑块中发现,这在关键环境条件下是不同的。我们进行了一项实地研究,评估生长在植被斑块中的贻贝与生长在邻近非植被斑块中的贻贝在贝壳形状上是否存在差异。我们从这两种斑块类型中取样,并使用几何形态计量学评估了它们的外壳形状和大小。结果表明,与非植被斑块相比,植被斑块贻贝的壳具有更大的后腹膨大、前腹膨大和球形特征,而非植被斑块的贻贝的壳则表现出相反的特征,因此贻贝的壳更长。发现的差异可能是由不同的温度条件、干燥率、波浪作用和贻贝在每种斑块类型中所暴露的种群密度造成的。这些结果揭示了该本地物种在细粒度尺度上具有显著的壳形表型可塑性,这可能是其成功扩展生态范围的原因之一。
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Phenotypic plasticity at fine-grained spatial scales: the scorched mussel Perumytilus purpuratus growing on Patagonian rocky salt-marshes
Understanding phenotypic plasticity of species at different spatial scales is vital in the current context of an increasing pace of environmental changes. Through this knowledge, it is possible to predict their potential to adapt and/or evolve in face of new environmental conditions such as climate change, and/or to understand their ecological range expansion. In Patagonian rocky salt-marshes, one of the most abundant invertebrate species is the scorched mussel Perumytilus purpuratus. In this system, this mussel can be found inhabiting both vegetated and non-vegetated patches, which differ in critical environmental conditions. We performed a field study evaluating whether mussels growing in vegetated patches differ in shell shape from those growing in adjacent non-vegetated patches. We sampled individuals from both patch types and assessed their shell shape and size using geometric morphometrics. The results showed that mussels from vegetated patches had shells that were more dorsoventrally expanded, anterodorsally restricted and globose in shape than those from non-vegetated patches, which showed the opposite traits resulting in a more elongated shell. The differences found could be driven by the different conditions of temperature, desiccation rate, wave action and population density to which mussels are exposed in each patch type. These results revealed the striking phenotypic plasticity of shell form of this native species at a fine-grained scale, which could be one of the explanations for its success in its ecological range expansion.
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来源期刊
Scientia Marina
Scientia Marina 生物-海洋与淡水生物学
CiteScore
2.10
自引率
0.00%
发文量
21
审稿时长
6-12 weeks
期刊介绍: Scientia Marina is the successor to Investigación Pesquera, a journal of marine sciences published since 1955 by the Institut de Ciències del Mar de Barcelona (CSIC). Scientia Marina is included in the Science Citation Index since 1998 and publishes original papers, reviews and comments concerning research in the following fields: Marine Biology and Ecology, Fisheries and Fisheries Ecology, Systematics, Faunistics and Marine Biogeography, Physical Oceanography, Chemical Oceanography, and Marine Geology. Emphasis is placed on articles of an interdisciplinary nature and of general interest.
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