• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aquatic Sciences >Microhabitat influences on stream insect emergence
【24h】

Microhabitat influences on stream insect emergence

机译：微生境对溪流昆虫出苗的影响

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

Understanding the factors controlling insect emergence from streams has applications to ecological theory regarding cross-boundary flux, along with practical value for monitoring stream function after restoration projects. We hypothesized that stream microhabitat would have effects on emergence that were independent of those mediated by the local stock of benthic macroinvertebrates. We set 50 emergence traps in a third-order stream in northern Minnesota, USA, during two study periods and used structural equation modeling to examine direct and indirect effects of benthic stock and microhabitat features on emergence. Emergence by biomass showed direct positive relationships to substrates of fines and detritus in the first sampling period, and to shallow depth and wood area in the second period. Emergence by abundance had direct positive relationships with benthic stock, CPOM, and fewer macrophytes in the first period, and with benthic stock and periphyton in the second period. Fine substrates may act to concentrate burrowing larvae, whereas CPOM and particularly wood may intercept drifting pre-emergent insects and provide exiting surfaces. Shallow depths may reduce the extent to which resident insects drift downstream (and leave the sample area) while emerging. Periphyton may be an indicator for patches with greater illumination, which itself attracts emergers. Our results suggest emergence is sensitive to environmental conditions at the microhabitat scale, and that stream restoration activities should consider habitat for emerging insects when designing projects.
机译：了解控制昆虫从溪流中涌出的因素，将其应用于有关跨界通量的生态学理论，以及监测恢复项目后溪流功能的实用价值。我们假设溪流微生境将对出苗的影响独立于底栖大型无脊椎动物本地种群介导的影响。我们在两个研究期间内，在美国明尼苏达州北部的三次流中设置了50个涌现陷阱，并使用结构方程模型研究了底栖种群和微生境特征对涌现的直接和间接影响。在第一个采样期间，生物量的出现与细粉和碎屑的基质直接相关，而在第二个采样期间与浅层深度和木材面积直接相关。丰度的出现与底栖动物，CPOM和第一时期的大型植物较少，而在第二时期与底栖动物和附生植物有直接的正相关关系。精细的底物可以起到集中挖穴幼虫的作用，而CPOM（尤其是木材）则可以拦截漂移的萌芽昆虫并提供出射表面。浅层深度可能会减少昆虫在出苗时向下游漂移（并离开样品区域）的程度。外围浮游生物可能是照明度更高的斑块的指示器，而斑块本身会吸引出芽。我们的结果表明，出苗对微生境规模的环境条件很敏感，溪流恢复活动在设计项目时应考虑到新兴昆虫的生境。

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