...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Sediment load and timing of sedimentation affect spore establishment in Macrocystis pyrifera and Undaria pinnatifida
【24h】

Sediment load and timing of sedimentation affect spore establishment in Macrocystis pyrifera and Undaria pinnatifida

机译：沉积物负荷和沉积时机影响着斑节菜和裙带菜的孢子形成

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

Although the frequency and magnitude of sedimentation often varies across coastal landscapes creating patches with different mean sediment loads, duration of sedimentation and rates of sediment resuspension, few studies have documented the emergent effects of spatiotemporal variability in sedimentation. Here, we conducted two laboratory experiments to evaluate such effects on the establishment of Macrocystis pyrifera and Undaria pinnatifida spores. In the first experiment, spore establishment was significantly affected by sediment load (the effective dose required for a 40 % reduction in establishment ranged between 16 and 60 mg sediment 1~(-1)) and sediment regime (relative sedimentation occurring before spore settlement, ~3 times more sediment was required for 20 % reduction in spore establishment when sedimentation occurred after spore settlement). The second experiment demonstrated that the effects of sediment depended on sediment load (spore establishment was 2-4 times greater when sediment load was 200 mg l~(-1) relative to 400 mg l~(-1)), variability in sedimentation (spore establishment was 1.36 times greater with variable than fixed sediment loads), repeated pulses of sedimentation (pulsed sedimentation decreased spore establishment by 59-91 % relative to a single sedimentation event) and timing of sedimentation relative to spore settlement (sedimentation before spore settlement decreased establishment by 51-95 % relative to sedimentation after spore settlement). These results have important implications for ecologists and resource managers attempting to predict the consequences of sedimentation, suggesting that it is not only important to consider sediment load, but also fine-scale temporal variability in sedimentation relative to key life-history events of the impacted organisms.
机译：尽管沿海地区的沉积频率和幅度经常变化，从而形成具有不同平均沉积物负荷，沉积持续时间和沉积物重悬浮速率不同的斑块，但很少有研究记录时空变化对沉积的影响。在这里，我们进行了两个实验室实验，以评估这种效应对斑节对虾和裙带菜孢子的建立的影响。在第一个实验中，孢子的形成受到沉积物负荷（沉积物减少40％所需的有效剂量介于16至60 mg沉积物1〜（-1）之间）和沉积物状态（相对沉降发生在孢子沉降之前，当孢子沉降后发生沉降时，要使孢子形成减少20％，需要的沉积物要多出约3倍）。第二个实验表明，泥沙的影响取决于泥沙负荷（当泥沙负荷为200 mg l〜（-1）时，相对于400 mg l〜（-1），孢子的形成要大2-4倍），沉积的变化性（孢子的建立是可变的，比固定的泥沙负荷大1.36倍），重复的沉淀脉冲（脉冲沉淀使孢子的建立相对于单个沉淀事件减少了59-91％）和沉淀相对于孢子沉降的时间（孢子沉降之前的沉淀减少了）相对于孢子沉降后的沉淀而言，其固含量为51-95％）。这些结果对试图预测沉积后果的生态学家和资源管理者具有重要意义，表明不仅要考虑沉积物负荷，而且相对于受影响生物的关键生命历史事件而言，沉积中的精细时间变异性也很重要。 。

著录项

  • 来源
    《Marine biology》 |2014年第7期|1583-1592|共10页
  • 作者

    Shane W. Geange; Abigail Powell; Katie Clemens-Seely; Cesar A. Cardenas;

  • 作者单位

    School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand,Department of Conservation, PO Box 10-420, Wellington, New Zealand;

    School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand;

    School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand,Department of Conservation, PO Box 10-420, Wellington, New Zealand;

    School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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