...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aquatic Invasions >Food web positioning of a recent coloniser: the North American Harris mud crab Rhithropanopeus harrisii (Gould, 1841) in the northern Baltic Sea
【24h】

Food web positioning of a recent coloniser: the North American Harris mud crab Rhithropanopeus harrisii (Gould, 1841) in the northern Baltic Sea

机译：最近的殖民者的食物网定位：波罗的海北部的北美哈里斯泥蟹 Rhithropanopeus harrisii （古尔德，1841年）

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Identifying resource use and functional traits of non-indigenous species are promising means to increase the ability to predict ecological consequences of invasions. One of the most widely spread brachyuran crab species, and a recent invader in the northern Baltic Sea, is the North American Harris mud crab, Rhithropanopeus harrisii (Gould, 1841). Although spread, establishment, and population structure have been studied for this species, little is known about its role and impact in a new environment. We investigated the position and role of R. harrisii in the coastal food web by combining spatial and temporal estimates of trophic position using stable isotopes with short-term food- and habitat-choice experiments. We observed a stable pattern in the trophic position between two environmentally different locations in the Archipelago Sea over the production season. The identification of a natural breakpoint in carbon stable isotopes at the size of 12 mm carapace width suggested a presence of an ontogenetic diet shift, which was confirmed by isotope signatures positioning large R. harrisii among secondary consumers and small individuals with primary consumers. The generalist consumer nature of R. harrisii and preference for structured habitat was supported by an active habitat and food choice, revealing no preference for prey species (polychaetes versus amphipod), but selection of brown algae over bare mud. To broaden the understanding of the functional role of R. harrisii , we combined our findings with other known biological and ecological traits of the species and qualitatively compared these to characteristics of other benthic organisms in the northern Baltic Sea, suggesting a general similarity in traits.
机译：识别非土著物种的资源利用和功能特性是提高预测入侵生态后果的能力的有前途的手段。北美哈里斯泥蟹（Rhithropanopeus harrisii，古尔德，1841年）是分布最广的短臂蟹物种之一，也是波罗的海北部最近的入侵者。尽管已经对该物种的传播，建立和种群结构进行了研究，但对其在新环境中的作用和影响知之甚少。我们研究了 R的位置和作用。通过将使用稳定同位素的营养位置的时空估计与短期食物和栖息地选择实验相结合，来研究沿海食物网中的哈里斯氏菌。在生产季节中，我们在群岛海中两个环境不同的位置之间的营养位置观察到了稳定的模式。碳稳定同位素的自然断裂点在12毫米甲壳宽度处的鉴定表明存在个体发育的饮食变化，这通过定位大R的同位素特征得以证实。二级消费者和具有初级消费者的小个体之间的哈里斯氏症。 R的一般消费者性质。活跃的栖息地和食物选择支持了哈里斯氏菌和对结构化栖息地的偏爱，表明没有偏食物种（多毛versus对两栖动物），而是选择褐藻而不是裸泥。拓宽对R的功能作用的理解。 harrisii，我们将发现与该物种的其他已知生物学和生态特征相结合，并定性地将其与波罗的海北部其他底栖生物的特征进行了比较，表明这些特征在总体上具有相似性。

著录项

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号