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首页> 外文期刊>Ocean & coastal management >Does the management of sandbar openings influence the macroinvertebrate communities in southern Brazil wetlands? A case study at Lagoa do Peixe National Park - Ramsar site
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Does the management of sandbar openings influence the macroinvertebrate communities in southern Brazil wetlands? A case study at Lagoa do Peixe National Park - Ramsar site

机译：沙洲开口的管理是否会影响巴西南部湿地的大型无脊椎动物群落？ Lagoa do Peixe国家公园的个案研究-Ramsar网站

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This study assessed the influence of an artificial sandbar opening on the macroinvertebrate richness, abundance and composition of the Lagoa do Peixe floodplains in the only Ramsar site in southern Brazil. The Lagoa do Peixe has its connection with the sea artificially opened every year at the end of winter. However, this management intervention has been carried out without the evaluation of the impact of this opening in the aquatic biodiversity. Six samplings were carried out over two years (from March 2008 to October 2009) which encompassed two artificial sandbar openings. The mean richness and abundance were lower in the floodplain sites influenced by the artificial sandbar opening (opened wetlands) than in the floodplain sites not influenced by this event (natural wetlands). Water salinity was higher in opened wetlands than in natural wetlands during the open sandbar samplings. The richness was negatively associated with water salinity, and the abundance was positively associated with hydroperiod, and negatively associated with conductivity. The composition of macroinvertebrate taxa was different between opened and natural wetlands. Our results suggest that artificial sandbar openings have a negative impact on freshwater macroinvertebrate communities in southern Brazil floodplain wetlands. Hydrologic variation and increase of salinity related to this management may be the main factors of the change in the richness, abundance and composition in opened wetlands. We concluded that the artificial sandbar opening should be carefully re-analysed or forbidden, since this management practice may be jeopardizing the aquatic macroinvertebrate community in a National Park and Ramsar site, where the biodiversity conservation is a priority and protected by Brazilian laws.
机译：这项研究评估了人工沙洲开口对巴西南部唯一的拉姆萨尔湿地（Lagoa do Peixe）漫滩平原大型无脊椎动物的丰富度，丰度和组成的影响。每年冬天结束时，Lagoa do Peixe都会与大海建立人工联系。但是，这种管理干预措施是在没有评估这种开放措施对水生生物多样性的影响的情况下进行的。两年（2008年3月至2009年10月）进行了六次采样，其中包括两个人造沙洲开口。受人工沙洲开放影响的洪泛区站点（开放的湿地）的平均丰富度和丰度要低于不受此事件影响的洪泛区站点（自然湿地）的平均值。在开放的沙洲采样期间，开放的湿地的水盐度高于自然湿地。丰度与水盐度呈负相关，而丰度与水周期呈正相关，而与电导率呈负相关。在开放湿地和自然湿地之间，大型无脊椎动物类群的组成是不同的。我们的结果表明，人工沙洲开口对巴西南部洪泛区湿地的淡水大型无脊椎动物群落有负面影响。与这种管理有关的水文变化和盐分的增加可能是开放湿地中丰富度，丰度和组成变化的主要因素。我们得出的结论是，应该仔细地重新分析或禁止人工沙洲开放，因为这种管理做法可能会危害国家公园和拉姆萨尔湿地的水生大型无脊椎动物群落，在这些地方，生物多样性保护是优先考虑的事，并受到巴西法律的保护。

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  • 来源
    《Ocean & coastal management》 |2013年第1期|26-32|共7页
  • 作者

    Liziane Bertotti Crippa; Cristina Stenert; Leonardo Maltchik;

  • 作者单位

    Laboratory of Ecology and Conservation of Aquatic Ecosystems, UNISIN0S, Av. Unisinos, 950, CEP 93022-000, UNIS1NOS, Sao Leopoldo, RS, Brazil;

    Laboratory of Ecology and Conservation of Aquatic Ecosystems, UNISIN0S, Av. Unisinos, 950, CEP 93022-000, UNIS1NOS, Sao Leopoldo, RS, Brazil;

    Laboratory of Ecology and Conservation of Aquatic Ecosystems, UNISIN0S, Av. Unisinos, 950, CEP 93022-000, UNIS1NOS, Sao Leopoldo, RS, Brazil;

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