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首页> 外文期刊>Estuarine Coastal and Shelf Science >Effects of commercial harvesting of intertidal macroalgae on ecosystem biodiversity and functioning
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Effects of commercial harvesting of intertidal macroalgae on ecosystem biodiversity and functioning

机译：商业性潮间带大藻类捕捞对生态系统生物多样性和功能的影响

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摘要

In 2009, the European Union has defined an organic label for macroalgae, which implies that the commercial harvest of algae shall not cause a significant impact on ecosystems. The aim of this work was to study the effects of hand harvesting of three algae: Fucus serratus, Palmaria palmata, and Porphyra linearis on the associated biodiversity and metabolism of the ecosystem. We used the BACI (Before-After Control-Impact) design to assess the impact of the disturbance (ⅰ) on the recovery of the harvested species, (ⅱ) on the specific and functional diversity of the associated algal and animal communities, and (ⅲ) for F. serratus and P. Unearis, on the metabolism of the area, using benthic chambers. Our work is based on a mix of fundamental and applied research to identify the effects of commercial harvesting regarding long-term changes, biological and functional interactions, and system responses (including socio-economic interactions). Results of the 12-month monitoring on F. serratus showed that canopy loss seemed to have a negative impact mainly on the diversity of the animal community and the metabolism of the studied area. No significant effects were observed on the algal community. The harvesting impact on the animal community was amplified by the settlement of an ephemeral canopy of Ulva spp., a seasonal opportunistic green alga. Results of the 12-month monitoring of P. palmata after harvesting did not show any significant impact. This alga was epiphytic on the dominant canopy of F. serratus, which was thus maintained, minimizing the impact of the harvest. Finally, results of the 12-month monitoring of P. Unearis were difficult to interpret because of an unexpected but continuous sand burial of the study site, one month after the beginning of the study and still covering the population after eight months. Hence, effects of P. Unearis harvesting were overshadowed by the natural variability. So far, our results have shown that commercial harvesting has different effects according to the target species, which emphasizes the necessity to continue long-term monitoring. Finally, this study also points out the valuable use of a "fundamental research" approach to deal with a practical management issue.
机译：2009年，欧盟为大型藻类定义了有机标签，这意味着商业性收获藻类不会对生态系统造成重大影响。这项工作的目的是研究手工收获三种藻类：锯形岩藻，棕榈棕和线性藻对相关生物多样性和生态系统代谢的影响。我们使用BACI（控制前后影响）设计来评估扰动（ⅰ）对收获物种恢复的影响，（on）对相关藻类和动物群落的特定和功能多样性的影响，以及（ ⅲ）对于锯缘肉。虫（F. serratus）和P. Unearis，使用底栖室进行该区域的新陈代谢。我们的工作基于基础研究和应用研究的混合，以确定商业捕捞对长期变化，生物学和功能相互作用以及系统响应（包括社会经济相互作用）的影响。对锯齿山。的12个月监测结果表明，冠层损失似乎对动物群落的多样性和研究区域的新陈代谢具有负面影响。没有观察到对藻类群落的显着影响。季节性机会性绿藻Ulva spp。的短暂树冠的沉降加剧了对动物群落的收获影响。收获后12个月对棕榈假单胞菌的监测结果未显示任何重大影响。该藻在锯缘短吻。的优势树冠上是附生的，因此得以维持，从而最大程度地减少了收获的影响。最后，由于研究地点出人意料却连续不断地埋葬沙土，在研究开始后的一个月，但在八个月后仍能覆盖整个人口，因此难以解释其对P. Unearis的12个月监测结果。因此，P。Unearis收成的效果被自然可变性所掩盖。到目前为止，我们的结果表明，根据目标物种的不同，商业化采伐具​​有不同的效果，这强调了继续进行长期监测的必要性。最后，本研究还指出了“基础研究”方法在处理实际管理问题方面的宝贵应用。

著录项

  • 来源
    《Estuarine Coastal and Shelf Science》 |2013年第20期|99-110|共12页
  • 作者

    Doriane Stagnol; Michel Renaud; Dominique Davoult;

  • 作者单位

    UPMC Univ. Paris 6, Station Biologique, Place Georges Teissier, 29680 Roscoff, France,CNRS, UMR 7144 AD2M, Place Georges Teissier, 29680 Roscoff, France,UMR7144, Station Biologique, Place Georges Teissier,29680 Roscoff, France;

    UPMC Univ. Paris 6, Station Biologique, Place Georges Teissier, 29680 Roscoff, France,CNRS, UMR 7144 AD2M, Place Georges Teissier, 29680 Roscoff, France;

    UPMC Univ. Paris 6, Station Biologique, Place Georges Teissier, 29680 Roscoff, France,CNRS, UMR 7144 AD2M, Place Georges Teissier, 29680 Roscoff, France;

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

    seaweed; canopy; seaweed harvesting; biodiversity; metabolism;

    机译：海藻天篷海藻收获;生物多样性;代谢;

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