...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Kelp in hot water: I. Warming seawater temperature induces weakening and loss of kelp tissue
【24h】

Kelp in hot water: I. Warming seawater temperature induces weakening and loss of kelp tissue

机译：热水中的海带：I.海水温度升高会导致海带组织变弱和流失

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

Recent declines and losses of highly productive and diverse kelp beds have been observed worldwide and linked to increases in ocean temperature. We investigated the impacts of 4 temperature treatments (11, 14, 18 and 21 degrees C) on growth, net length change and mortality of the dominant kelp species in Nova Scotia: Saccharina latissima, Laminaria digitata and Agarum clathratum. Growth rates of A. clathratum were reduced at 18 degrees C over 3 wk of exposure, and all species experienced negative net changes in length at this temperature. Exposure to 21 degrees C led to tissue loss at least twice that observed at 11 degrees C and mortality within the first 2 wk of exposure. Exposure to 21 degrees C for 1 wk reduced blade tissue strength (breaking stress) and extensibility (breaking strain) by 40 to 70% in S. latissima and L. digitata, and all 3 species exhibited reduced strength after 3 wk exposure to 18 degrees C. Histological examination of the blade tissue showed temperature-induced damage to the cellular structure of blades of S. latissima and L. digitata. A. clathratum displayed limited tissue damage and was less susceptible to temperature-induced tissue weakening and loss. Our findings provide a mechanism by which rising temperatures could contribute to observed population declines of kelp species.
机译：在世界范围内，近来高产和多样化的海藻床的下降和损失已被观察到，并且与海洋温度的升高有关。我们调查了4种温度处理（11、14、18和21摄氏度）对新斯科舍省主要海藻种类的生长，净长变化和死亡率的影响：Saccharina latissima，Laminaria digitata和Agarum clathratum。在暴露3 wk的条件下，clathratum的生长速率在18摄氏度下降低了，在此温度下所有物种的净长度均出现负变化。暴露于21°C导致组织损失至少是11°C观察到的组织损失的两倍，并且在暴露的前2周内死亡。暴露于21°C 1 wk时，拉丁美沙门氏菌和指状乳杆菌的叶片组织强度（断裂应力）和延展性（断裂应变）降低40％至70％，而3 wk暴露于18度时，所有3种物种的强度均降低C.叶片组织的组织学检查显示温度引起的对S. latissima和L. digitata叶片细胞结构的破坏。 clathratum显示出有限的组织损伤，并且不易受温度引起的组织弱化和损失的影响。我们的发现提供了一种机制，温度升高可通过这种机制促进观察到的海带物种种群减少。

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