首页> 外文期刊>Marine Pollution Bulletin >Sediment Fluxes in Intertidal Biotopes: BIOTA Ⅱ
【24h】

Sediment Fluxes in Intertidal Biotopes: BIOTA Ⅱ

机译:潮间带生物群落的沉积物通量:BIOTAⅡ

获取原文
获取原文并翻译 | 示例
       

摘要

An overview of the field work research projects under the LOIS Biological Influences On interTidal Areas (BIOTA) programme is presented. The main objective of BIOTA is to characterize and quantify fluxes of sediments and the influence of biological components within the intertidal saltmarsh and mudflat zones of the main LOIS study area. Three studies concerned with sediment dynamics and the biota at a variety of sites and salt marsh types on the east coast are described, and a saltmarsh flux study at a single site in Norfolk is briefly outlined (Fig. 1). Some examples of the preliminary research findings are shown with reference to selected sites in the Humber estuary. Regular monitoring of sediment levels out on the sand and mudflats showed remarkable stability, with the amplitude of variation rarely exceeding 5 cm over the four years of measurement. Some sites (generally the more cohesive sediments) displayed a seasonal pattern of elevation change. Oscillations of surface level changes decreased towards the marsh and damping continued with increasing vegetation cover. As expected net accretion generally decreases landward under reduced submergence times, particularly on the open coast marshes; however different sedimentation profiles were observed. In the Humber estuary, net accretion was generally greatest in the middle to lower marsh, with periods of erosion at the seaward edge. The role of vegetation in accretion is complex and may be site specific, affected by a variety of physical factors. The cord grass, Spartina anglica appears to have little effect on sediment deposition, but is more important as a sediment stabilizer during periods of erosion. The types of models that can be derived from the BIOTA study are briefly outlined.
机译:概述了LOIS生物对潮间带生物影响(BIOTA)计划下的野外工作研究项目。 BIOTA的主要目的是表征和量化LOIS研究区域潮间带盐沼和滩涂区域内的沉积物通量以及生物成分的影响。描述了三项有关东海岸各种地点和盐沼类型的沉积物动力学和生物区系的研究,并简要概述了诺福克地区单个地点的盐沼通量研究(图1)。初步研究结果的一些示例参考了汉伯河口的选定地点。定期监测沙子和泥滩上的沉积物水平显示出显着的稳定性,在四年的测量中变化幅度很少超过5 cm。一些地点(通常是粘性更大的沉积物)显示出海拔变化的季节性模式。随着沼泽植被的增加,地表水平面变化的振荡向沼泽减少,阻尼作用持续。正如预期的那样,在减少的淹没时间下,特别是在沿海湿地,净增生通常会减少向内陆。然而,观察到不同的沉积特征。在亨伯河口,中到下沼泽的净增生通常最大,在沿海边缘有侵蚀期。植被在增生中的作用是复杂的,并且可能是特定地点的,受各种物理因素的影响。草地早熟禾(Spartina anglica)似乎对沉积物的沉积几乎没有影响,但在侵蚀期间作为沉积物稳定剂更为重要。简要概述了可以从BIOTA研究得出的模型类型。

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