• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >Do Sulphuric Acid And The Brown Alga Desmarestia Viridis Support Community Structure In Arctic Kelp Patches By Altering Grazing Impact, Distribution Patterns, And Behaviour Of Sea Urchins?
【24h】

Do Sulphuric Acid And The Brown Alga Desmarestia Viridis Support Community Structure In Arctic Kelp Patches By Altering Grazing Impact, Distribution Patterns, And Behaviour Of Sea Urchins?

机译：硫酸和褐藻绿藻是否通过改变放牧影响，分布方式和海胆行为来支持北极海带斑块中的群落结构？

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

Macrobenthic community structure and the distribution of the green sea urchin (Strongylocentrotus droebachiensis) were recorded inside and outside (=barrens) of kelp patches {Alaria esculenta) at Kongsfjordneset, Svalbard between August 2002 and October 2006. In manipulative field experiments, conducted at Kongsfjordneset, Svalbard in August 2002, the effect of the presence of the brown seaweed Desmarestia viridis on sea urchin distribution and kelp grazing was determined. Additionally, we studied the effect of sulphuric acid, which is produced and stored by D. viridis, on sea urchin movements in the laboratory at Ny-Alesund, Svalbard, in May 2006. Sea urchin densities were two- to threefold lower in kelp patches than on barrens. The macrobenthic community inside kelp patches hosted 39% more species and was of different species composition than on barrens. Anchored pieces of the kelp A. esculenta were less consumed when surrounded by D. viridis than non-surrounded conspecifics. Changes in pH affected the behaviour of sea urchins. Exposing sea urchins to 500 μl seawater at pH 7.5 caused them to stop, while the exposure of as little as 25 μl at pH 1 caused sea urchins to move in the opposite direction. Acid-mediated escape responses in sea urchin behaviour suggest chemical protection by D. viridis as an additional mechanism to mechanical protection in the generation of kelp refuges. These results improve our understanding of how isolated kelp beds can persist over a wide range of environmental conditions, like wave-sheltered sites, and suggest that changes in community structure may be in part attributable to altered trophic interactions.
机译：在2002年8月至2006年10月期间，在斯瓦尔巴特群岛的Kongsfjordneset的海带斑块（Alaria esculenta）的内部和外部（=贫瘠）记录了大型底栖动物群落结构和绿海胆（Strongylocentrotus droebachiensis）的分布。在Kongsfjordneset进行的操纵性野外实验中在2002年8月的斯瓦尔巴特群岛，我们确定了棕色海藻Desmarestia viridis的存在对海胆分布和海带放牧的影响。此外，我们于2006年5月在斯瓦尔巴特群岛Ny-Alesund的实验室中研究了D. viridis生产和储存的硫酸对海胆运动的影响。海带斑块中海胆密度降低了2到3倍比贫瘠的海带斑块内的大型底栖动物群落比贫瘠的种群多容纳39％的物种，并且具有不同的物种组成。当被D. viridis包围时，海带A. esculenta的锚定块比未包围的同种菌群的食用量少。 pH值的变化影响了海胆的行为。将海胆暴露于pH 7.5的500μl海水中使其停止，而暴露于pH 1的25μl则导致海胆向相反方向移动。海胆行为中酸介导的逃逸反应表明，D。viridis进行化学保护是海带避难所中机械保护的另一种机制。这些结果使我们对孤立的海藻床如何在各种环境条件下（如避浪站点）能够持续存在的理解有所提高，并表明群落结构的变化可能部分归因于营养相互作用的改变。

著录项

相似文献

  • 外文文献
  • 中文文献
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