...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Variation in the response of intertidal infaunal invertebrates to nutrient additions: field manipulations at two sites within Port Phillip Bay, Australia
【24h】

Variation in the response of intertidal infaunal invertebrates to nutrient additions: field manipulations at two sites within Port Phillip Bay, Australia

机译：潮间带无脊椎动物对养分添加的响应变化：澳大利亚菲利普港湾两个地点的田间操作

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Nutrient addition experiments are one way of testing the importance of nutrients in ecological systems and can be undertaken relatively easily in soft sediments. We added nutrients (Osmo-cote~(~R)) at 2 sites in Port Phillip Bay, Australia, which differed in proximity to sources of nutrient loading. Changes in faunal assemblages were assessed over an 18 wk experimental period in 1998. At the Sand Island site, nitrate levels were elevated in the high dose treatments and 3 taxa showed responses to nutrient additions, with differences in densities between control and dosed plots of between 50 and 600%. Assemblage-level measures of total abundance and diversity were approximately 20 to 80% greater in dosed plots relative to controls at the end of the experimental period. In contrast, at the more enriched Western Treatment Plant site, 3 of the 10 most dominant taxa were affected by the nutrient additions, with changes of between 50 and 200% observed during the course of the experiment. At this site none of the assemblage level measures of abundance, biomass and diversity reflected an effect of the dose treatments. These results are broadly consistent with other studies that suggest that in areas of low ambient nutrient availability diversity is likely to increase, while in areas with high background nutrient loadings there is likely to be a decrease. At Sand Island, changing the nutrient status of the area is liable to result in rapid changes in several deposit-feeding populations. At the Western Treatment Plant, the same absolute change in N may have less impact on the invertebrate fauna.
机译：营养添加实验是测试养分在生态系统中的重要性的一种方法，可以相对容易地在软质沉积物中进行。我们在澳大利亚菲利普港湾的2个地点添加了养分（Osmo-cote〜（〜R）），这些养分在养分装载来源上的距离有所不同。在1998年的18周实验期内，评估了动物群落的变化。在沙岛地区，高剂量处理的硝酸盐含量升高，而3个分类单元显示出对营养添加的响应，而对照和剂量田间的密度差异很大。 50和600％。在实验期结束时，相对于对照，在剂量图中，总水平的总丰度和多样性的组合水平度量要高出大约20％至80％。相反，在更丰富的Western Treatment Plant站点上，最主要的10个分类单元中有3个受到营养添加的影响，在实验过程中观察到50％至200％的变化。在这个站点上，没有任何有关丰度，生物量和多样性的组合水平度量反映剂量处理的效果。这些结果与其他研究大致吻合，其他研究表明，在环境养分利用率较低的地区，多样性可能会增加，而在背景养分含量较高的地区，多样性可能会下降。在沙岛，改变该地区的养分状况很容易导致一些以存款为食的种群迅速变化。在西方处理厂，相同的氮绝对变化对无脊椎动物区系的影响可能较小。

著录项

相似文献

  • 外文文献
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