...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Soil Ecology >Effects of rainfall manipulations versus a natural aridity gradient on plant litter arthropods in desert and Mediterranean ecosystems
【24h】

Effects of rainfall manipulations versus a natural aridity gradient on plant litter arthropods in desert and Mediterranean ecosystems

机译：降雨操纵对天然干旱梯度对沙漠及地中海生态系统植物垃圾节肢动物的影响

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

Predicting responses of litter arthropods to future variation in precipitation is critical for understanding decomposition processes under global climate change. A field experiment on litter arthropods extracted from litterbags using Berlese-Tullgren funnels was conducted under simulated drought and increasing precipitation treatments at a semiarid site and a Mediterranean site, and along a natural climatic gradient from arid to mesic Mediterranean ecosystems during three consecutive years. Our objective was to examine the effects of variation in water availability on the abundance of litter arthropods along the aridity gradient. The results demonstrated positive responses of total abundances, including Acari abundance, but negative responses of taxonomic richness to experimentally increased precipitation at the semiarid site and the Mediterranean site. Collembolan abundance responded positively while the Shannon index responded negatively to experimental precipitation at the Mediterranean site only. However, total abundance and collembolan abundance were found to decrease across a mean annual precipitation (MAP) gradient from the arid site to the mesic Mediterranean site. Quantile regression for linear mixed-effects models demonstrated a negative effect of MAP on Acari abundance at the medium level of Acari abundance but weak positive effects of MAP on taxonomic richness and the Shannon index. In conclusion, we found that the distribution of abundance was a poor proxy for predicting the response of the studied litter arthropod assembly to spatial variation in precipitation.
机译：预测垃圾节肢动物对降水未来变化的反应对于了解全球气候变化下的分解过程至关重要。利用Berlese-Tullgrgren Funnels提取的垃圾节肢动物的田野实验是在半干旱地点和地中海网站上的模拟干旱和沉淀治疗，并在连续三年中沿着干旱地区的自然气候梯度进行了自然气候梯度。我们的目的是探讨沿着干旱梯度堆积垃圾节肢动物的水可用性变化的影响。结果表明了总丰富的正反应，包括acari丰富，但分类学丰富性的负面反应在半干旱地点和地中海网站上进行实验增加的降水。 Collembolan丰度积极回应，而Shannon指数仅对地中海网站的实验降水负面反应。然而，发现总丰富和柯氏博兰泛冰和铜泛冰都会减少，从干旱地区到浅点地中海网站的平均年降水量（地图）梯度减少。线性混合效果模型的分量回归在acari丰富的中等水平上展示了acari丰度的阴性效果，但地图对分类学丰富性和香农指数的弱积效。总之，我们发现丰度的分布是预测研究垃圾节肢动物组件对沉淀的空间变化的响应的差的代理。

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