Large-scale impacts of bottom trawling on shelf primary productivity
Large-scale impacts of bottom trawling on shelf primary productivity
复制标题
DOI：
10.1016/j.csr.2007.05.006
复制
发表时间：
2007-10-01
影响因子：
2.3
通讯作者：
Eleftheriou, Anastasios
中科院分区：
文献类型：
--
作者：
Dounas, Costas;Davies, Ian;Eleftheriou, Anastasios
底拖网捕捞造成的海底扰动影响生态系统进程，例如营养物再生的速度和幅度。如果能够获得关于营养盐通量影响的可靠数据，就可以模拟浮游生物群落对这种影响的潜在反应。在北大西洋外大陆架和上斜坡渔场（赫拉克利翁湾，克里特岛，东地中海），我们采用了一种新的现场仪器，它可以模拟通过拖网拖网垂悬物在海底和直接季节性测量的溶解和颗粒营养释放率造成的海底扰动。然后将这些观测数据整合到3D生态系统模型中。结果显示，除了自然季节性周期的脉冲外，底拖网捕捞还可能引发相当大的生产力脉冲。(c)2007爱思唯尔有限公司保留所有权利。
Disturbance of the seabed resulting from bottom trawling affects ecosystem processes, such as the rate and magnitude of nutrient regeneration. The potential responses of the plankton community arising from such effects can be modelled, provided that reliable data on the effects on nutrient fluxes are available. In a north Cretan outer continental shelf and upper slope fishing ground (Heraklion Bay, Crete, Eastern Mediterranean) we applied a new field instrument which can simulate the passage of trawl groundropes across the sea floor and made direct seasonal measurements of the rate of dissolved and particulate nutrient releases resulting from seabed disturbance. These observational data were then integrated in a 3D ecosystem model. Results revealed that bottom trawling may trigger off considerable productivity pulses, in addition to pulses from the natural seasonal cycle. (c) 2007 Elsevier Ltd. All rights reserved.