...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Impacts of acute elevated seawater temperature on the feeding preferences of an Antarctic amphipod toward chemically deterrent macroalgae
【24h】

Impacts of acute elevated seawater temperature on the feeding preferences of an Antarctic amphipod toward chemically deterrent macroalgae

机译：急性海水温度升高对南极两栖动物对化学威慑性大藻类的摄食偏好的影响

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

As mean global temperatures continue to rise, regional seawater temperature measurements have revealed that some geographic areas are warming faster than others. One region that is experiencing particularly rapid warming is the western Antarctic Peninsula. Previous studies investigating direct effects of warming on Antarctic marine invertebrates have established that small increases in temperature can have significant impacts on aspects of behavior, physiology, and growth rates in these largely stenothermal organisms. To investigate how wanning may impact feeding preferences of an ecologically important mesograzer on macroalgae of the Antarctic Peninsula, we examined the impacts of exposure to acute elevated temperature on the ecologically important omnivorous amphipod Gondoge-neiea antarctica (Chevreux) at Palmer Station, Antarctica (64°46'S, 64°03'W) in April-May 2011. Amphipods were exposed to 1.5 ℃ (mean monthly upper summer temperature) or 3.5 ℃ (representative of current transient summer temperature peaks and projected mean for 2100) for a 24 h period. These amphipods were then used in choice-feeding assays with artificial food containing chemical extracts from six species of sympatric macroalgae known to produce feeding deterrents. We found that during acute exposure to elevated temperature (+2.0 ℃), amphipods lost their feeding preferences in assays with artificial foods containing lipophilic (one macroalga), hydrophilic (three macroalgae), or combined lipophilic/hydrophilic (one macroalga) extracts. Our findings suggest that increased frequency in transient peaks and longer-term upward trends in ambient summer seawater temperature have the potential to alter feeding preferences in a common mesograzer that could influence macroalgal communities that dominate benthic communities along the western Antarctic Peninsula.
机译：随着全球平均温度持续升高，区域海水温度测量显示某些地理区域的变暖速度比其他区域快。南极半岛西部是一个特别迅速变暖的地区。先前研究变暖对南极海洋无脊椎动物的直接影响的先前研究已经确定，温度的小幅升高可能会对这些主要为热成因的生物体的行为，生理学和增长率产生重大影响。为了研究衰落对南极半岛大型藻类的具有生态重要性的中型食草动物的进食偏好的影响，我们在南极州帕尔默站考察了急性高温暴露对具有生态学意义的杂食性两栖纲食足双翅目南极洲（Chevreux）的影响（64） 2011年4月至5月，温度为46°S，64°03'W。两栖动物暴露于1.5℃（夏季平均每月最高温度）或3.5℃（代表当前瞬时夏季温度峰值和2100的预计平均值）持续24小时。然后将这些两足纲动物用于人工喂养食品的选择喂养试验中，该人工食品含有六种已知可产生摄食威慑物的同胞大型藻类的化学提取物。我们发现，在暴露于高温（+2.0℃）的急性过程中，两栖类动物在使用含有亲脂性（一种大型藻类），亲水性（三种大型藻类）或亲脂性/亲水性（一种大型藻类）提取物的人工食品进行测定时失去了进食的偏好。我们的研究结果表明，瞬态峰值的频率增加和夏季海水温度的长期上升趋势有可能改变普通中型放牧者的摄食偏好，这可能会影响南极半岛西部底栖生物群落的大型藻类群落。

著录项

  • 来源
    《Marine biology》 |2015年第2期|425-433|共9页
  • 作者

    Julie B. Schram; James B. McClintock; Charles D. Amsler; Bill J. Baker;

  • 作者单位

    Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294-1170, USA;

    Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294-1170, USA;

    Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294-1170, USA;

    Department of Chemistry, University of South Florida, Tampa, FL 33620-5250, USA;

  • 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