海草叶冠的年际变化受局地环境变化的调节

IF 1 4区 生物学 Q4 ECOLOGY Marine Biology Research Pub Date : 2023-03-16 DOI:10.1080/17451000.2023.2193898
Celia Delgado-Serrano, F. Tuya
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引用次数: 2

摘要

摘要海草创造了具有重要保护意义的三维栖息地(即草地),这些栖息地分布在不同的环境条件下,具有较大的空间尺度。结节海鞘是一种暖温带海草,分布于整个地中海和邻近的大西洋。与许多海草一样,该物种的冠层活力呈年度(季节性)模式,春夏叶冠结构(如枝条密度和叶长)最大,而冬季叶冠结构减少。由于这种海草在其分布范围内经历了不同的环境(如热)情况,我们测试了叶冠结构在芽密度、叶长和地上生物量方面的年(季节)变化是否受当地环境(此处为热)变化的调节。当地环境状况(热状况,根据海面温度的变化,SST)并不能预测结瘤梭菌芽密度在其分布范围内的年变化。然而,叶长和生物量的年变化主要通过局部热状况的变化来预测。就SST而言,更大的年度环境变化与叶冠结构的更显著的季节变化有关,无论是在叶长还是生物量方面。如果气候变化的一个主要影响是环境变化的增加,那么结节草草地在其分布范围内的年叶冠变化可能会增加。
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Annual variation in leaf canopy across a seagrass distribution range is modulated by local environmental variation
ABSTRACT Seagrasses create three-dimensional habitats (i.e. meadows) of paramount conservation relevance, which are distributed across large spatial scales, under varying environmental conditions. Cymodocea nodosa (Ucria) Ascherson is a warm-temperate seagrass, distributed along the entire Mediterranean and the adjacent Atlantic Ocean. As with many seagrasses, this species shows an annual (seasonal) pattern in canopy vitality, with maximums in leaf canopy structure (e.g. shoot density and leaf length) in spring-summer, while canopy leaf structure is reduced in winter. Since this seagrass experiences varying environmental (e.g. thermal) scenarios across its distribution range, we tested whether annual (seasonal) variation in the leaf canopy structure, in terms of shoot density, leaf length and above-ground biomass, are modulated by local environmental (here, thermal) variation. Annual variation in the shoot density of C. nodosa across its distribution range was not predicted by local environmental regimes (thermal regimes, in terms of variation in sea surface temperature, SST). However, annual variation in leaf length and biomass was significantly predicted by variation in local thermal regimes. A larger annual environmental variation, here in terms of SST, was connected with a more marked seasonal variation in leaf canopy structure, both in terms of leaf length and biomass. If a major effect of climate change is an increase in environmental variation, an increase in the annual leaf canopy variation for C. nodosa meadows along its distribution range might be expected.
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来源期刊
Marine Biology Research
Marine Biology Research 生物-海洋与淡水生物学
CiteScore
2.10
自引率
0.00%
发文量
55
审稿时长
6-12 weeks
期刊介绍: Marine Biology Research (MBRJ) provides a worldwide forum for key information, ideas and discussion on all areas of marine biology and biological oceanography. Founded in 2005 as a merger of two Scandinavian journals, Sarsia and Ophelia, MBRJ is based today at the Institute of Marine Research, Bergen, Norway. The Journal’s scope encompasses basic and applied research from all oceans and marine habitats and on all marine organisms, the main criterium for acceptance being quality.
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