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首页> 外文期刊>Estuarine Coastal and Shelf Science >Resilience and stability of Cymodocea nodosa seagrass meadows over the last four decades in a Mediterranean lagoon
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Resilience and stability of Cymodocea nodosa seagrass meadows over the last four decades in a Mediterranean lagoon

机译:在地中海泻湖中,过去四年的结节藻海草草甸的复原力和稳定性

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摘要

Understanding what controls the capacity of a coastal lagoon ecosystem to recover following climatic and anthropogenic perturbations and how these perturbations can alter this capacity is critical to efficient environmental management. The goal of this study was to examine the resilience and stability of Cymodocea nodosa-dominated seagrass meadows in Urbino lagoon (Corsica, Mediterranean Sea) by characterizing the spatio-temporal dynamics of seagrass meadows over a 40-year period and comparing (anthropogenic and climatic) environmental fluctuations. The spatio-temporal evolution of seagrass meadows was investigated using previous maps (1973, 1979, 1990, 1994, 1996, 1999) and a 2011 map realized by aerial photography-remote sensing combined with G1S technology. Environmental fluctuation was investigated via physical-chemical parameters (rainfall, water temperature, salinity, turbidity, dissolved oxygen) and human-impact changes (aquaculture, artificial channel). The results showed a severe decline (estimated at -49%) in seagrass meadows between 1973 and 1994 followed by a period of strong recovery (estimated to +42%) between 1994 and 2011. Increased turbidity, induced either by rainfall events, dredging or phytoplankton growth, emerged as the most important driver of the spatio-temporal evolution of Cymodocea nodosa-dominated meadows in Urbino lagoon over the last four decades. Climate events associated to increased turbidity and reduced salinity and temperature could heavily impact seagrass dynamics. This study shows that Urbino lagoon, a system relatively untouched by human impact, shelters seagrass meadows that exhibit high resilience and stability.
机译:了解什么能控制沿海泻湖生态系统在气候和人为干扰之后恢复的能力,以及这些干扰如何改变这种能力,对于有效的环境管理至关重要。这项研究的目的是通过表征40年内海草草甸的时空动态并比较(人为和气候, )环境波动。使用先前的地图(1973、1979、1990、1994、1996、1999)和通过航空摄影-遥感结合G1S技术实现的2011年地图研究了海草草甸的时空演变。通过物理化学参数(降雨,水温,盐度,浊度,溶解氧)和人类影响变化(水产养殖,人工渠道)调查了环境波动。结果表明,1973年至1994年之间,海草草甸出现了严重的下降(估计为-49%),然后在1994年至2011年之间经历了一段强劲的恢复期(估计为+ 42%)。由于降雨,疏dr或降雨造成的浊度增加。在过去的四十年中,浮游植物的生长是乌比诺泻湖中结节藻(Cymodocea nodosa)为主的草甸时空演变的最重要驱动力。与浊度增加,盐度和温度降低有关的气候事件可能会严重影响海草的动力学。这项研究表明,Urbino泻湖是一个相对不受人类影响的系统,可以遮盖表现出高弹性和稳定性的海草草甸。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2013年第20期|89-98|共10页
  • 作者单位

    UMR 6134 CNRS Sciences pour l'Environnement, UMS 3514 CNRS, Stella Mare, Universite de Corse, BP 52, 20250 Cone, France;

    UMR 6134 CNRS Sciences pour l'Environnement, UMS 3514 CNRS, Stella Mare, Universite de Corse, BP 52, 20250 Cone, France,IRD, UMR 5119 ECOSYM, Universite Montpellier 2, 34095 Montpellier, France;

    Aix-Marseille Universite, Institut Mediterraneen de Biodiversite et d'Ecologie (IMBE), UMR-CNRS-IRD 6372, 13331 Marseille, France;

    Aix-Marseille Universite, Institut Mediterraneen de Biodiversite et d'Ecologie (IMBE), UMR-CNRS-IRD 6372, 13331 Marseille, France;

    UMR 6134 CNRS Sciences pour l'Environnement, UMS 3514 CNRS, Stella Mare, Universite de Corse, BP 52, 20250 Cone, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cymodocea nodosa; spatio-temporal dynamics; disturbance; resilience; GIS; Urbino lagoon;

    机译:结节藻;时空动态骚乱;弹性;地理信息系统乌尔比诺泻湖;

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