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首页> 外文期刊>Marine ecology progress series >Impact of recreational harvesting on assemblages in artificial rocky habitats
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Impact of recreational harvesting on assemblages in artificial rocky habitats

机译：休闲采伐对人工岩石栖息地组合的影响

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摘要

Man-made structures have become ubiquitous features of coastal landscapes. These artificial habitats are popular recreation sites. Patterns and effects of recreational activities were investigated from 1999 to 2004 on coastal structures along 40 km of shoreline in the Emilia Romagna region (North Adriatic Sea, Italy). Four studies estimated the magnitude and frequency of exploitation by people, and established how human exploitation varied in space and time. A manipulative experiment involving the removal of mussels, mimicking the impact of human harvesting, was carried out to identify the effects of extensive mussel exploitation. Recreational exploitation was a major recurrent disturbance. Hundreds of people visited defence structures for recreational fishing and to harvest a variety of invertebrates to be used primarily as food. Human exploitation was most intense during the spring and summer but relatively unpredictable at scales of days and hours. Exploitation was homogeneous among different locations, despite marked differences in the accessibility of the structures. Visitors to the structures were mainly local people. Harvesting of mussels was particularly disruptive for the assemblages, leading to depletion of mussel beds, opening of unoccupied space, patchiness in the assemblages, and favouring the development of macroalgae. The main types of macroalgae were green and filamentous algae, which are a nuisance for beach tourism in the area, and the invasive species Codium fragile ssp. tomentosoides. Effective management of human access to artificial habitats is essential, since recreational exploitation influences the distribution and structure of their associated assemblages, ultimately affecting the native characteristics of the areas.
机译：人造结构已成为沿海景观的普遍特征。这些人工栖息地是受欢迎的娱乐场所。在1999年至2004年期间，对艾米利亚-罗马涅地区（义大利北部亚得里亚海）40公里海岸线沿线沿海结构的娱乐活动的模式和影响进行了调查。四项研究估计了人类剥削的程度和频率，并确定了人类剥削在空间和时间上是如何变化的。进行了涉及去除贻贝，模仿人类收获的影响的操纵性实验，以确定贻贝广泛开采的影响。娱乐性剥削是主要的经常性干扰。数百人参观了防御设施，进行休闲捕鱼和收获各种无脊椎动物，主要用作食物。在春季和夏季，人类的剥削最为激烈，但在数天和数小时的规模上相对难以预测。尽管建筑物的可及性明显不同，但不同地点之间的开采是同质的。参观者主要是当地人。贻贝的收获对于这些鱼类群尤其具有破坏性，导致贻贝层的枯竭，空置空间的开放，鱼类群的斑块化以及有利于大型藻类的发展。大型藻类的主要类型是绿色藻类和丝状藻类，这些藻类对该地区的海滩旅游造成干扰，以及入侵物种脆弱的小球藻。绒毛类。有效管理人类进入人工栖息地的途径至关重要，因为休闲开发会影响其相关集合的分布和结构，最终影响该地区的自然特征。

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