...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Macrobenthic community structure and influence on denitrification capacity in soft sediments (Mobile Bay, Alabama, USA)
【24h】

Macrobenthic community structure and influence on denitrification capacity in soft sediments (Mobile Bay, Alabama, USA)

机译：大型底栖动物群落结构及其对软沉积物中反硝化能力的影响（美国阿拉巴马州莫比尔湾）

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

Benthic macrofauna play important roles in coastal ecosystems through their impact on nutrient cycling and by serving as an important trophic link. This study investigated the influence of environmental stressors on macrofaunal community abundance, biomass and diversity and evaluated impacts of those benthic organisms on nutrient fluxes and denitrification capacity in Mobile Bay, a shallow subtropical estuary in the northern Gulf of Mexico. Between January and May 2016, 22 stations in the lower bay were sampled, and the distance from the sea and sediment characteristics were identified as the principal constraints for macrofaunal distribution and taxonomic composition. Higher diversity of macrofauna was found near the mouth of the bay, likely due to hydrological characteristics of the bay, in addition to distance from anthropogenic disturbances near coasts. Sediments comprised of 60-80% sand showed higher abundances, biomass and diversity compared to muddier or sandier sediments, potentially because these sediments were more stable. Although macrofaunal abundance, biomass and diversity differed across stations in the bay, we did not find a relationship between macrofaunal abundances or biomass and denitrification capacity. Both abundance and biomass of infauna were low in Mobile Bay (4000 ind. m(-2) and 5 g DW m(-2) at most sites) compared to those in previous studies which showed a positive relationship between macrofaunal abundances and denitrification. The lack of the relation between macrofauna and denitrification suggests that a threshold of abundance, biomass and/or burrowing activity is necessary to increase bioturbation or irrigation to sufficient levels to affect denitrification.
机译：底栖大型动物通过影响养分循环并作为重要的营养纽带，在沿海生态系统中发挥重要作用。这项研究调查了环境压力因素对大型动物群落丰度，生物量和多样性的影响，并评估了这些底栖生物对墨西哥湾北部亚热带浅河口莫比尔湾的营养通量和反硝化能力的影响。在2016年1月至2016年5月之间，对下湾的22个站进行了采样，并且确定了距海洋的距离和沉积物特征是大型动物分布和生物分类组成的主要限制因素。在海湾口附近发现了大型动物区系，除了距海岸附近的人为干扰有一定距离外，这还可能是由于海湾的水文特征所致。与泥质或沙质沉积物相比，由60％至80％的沙子组成的沉积物显示出更高的丰度，生物量和多样性，这可能是因为这些沉积物更稳定。尽管海湾中各个站点的大型动物丰度，生物量和多样性都不同，但我们并未发现大型动物丰度或生物量与反硝化能力之间的关系。与以前的研究相比，莫比尔湾的动植物丰度和生物量均较低（大多数站点<4000 ind。m（-2）和<5 g DW m（-2）），这表明大型动物丰度和生物量之间存在正相关关系。反硝化。大型动物区系与反硝化之间缺乏联系，这表明必须有一个丰度，生物量和/或穴居活动的阈值，才能使生物扰动或灌溉增加到足以影响反硝化的水平。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 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