...
首页> 外文期刊>Forest Ecology and Management >Windthrow and recruitment of large woody debris in riparian stands
【24h】

Windthrow and recruitment of large woody debris in riparian stands

机译:向河岸看台扔草并回收大块木屑

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

To document the impacts of windthrow in riparian leave strips and identify the components needed for small stream large woody debris (LWD) recruitment modeling, we monitored nine small streams at a temperate rainforest site in coastal British Columbia. This study was a component of a larger integrated study of forest management impacts on small streams. A series of small clearcuts were harvested in 1998 in a 70-year-old second growth stand that had regenerated naturally following logging and wildfire. Three cutblocks each were assigned to 10m and 30m buffer width treatments and three areas were assigned as unharvested controls. Seven years after the 1998 logging, all logs greater than 10cm diameter that spanned at least part of stream channel width were measured. A total of 179 logs were recorded. Post-harvest windthrow was higher in the 10m buffer treatment, while competition-related standing tree mortality was higher in the controls. The major windthrow events had occurred in the first and second years after logging of adjacent stands. There was no significant difference in the number of spanning and in-stream logs in the 10m, 30m buffer and control treatments. More than 90% of the LWD was in the 10-30cm diameter classes. The majority of logs were oriented perpendicular to the stream channel. At the time of measurement, the majority of these trees were still suspended above the stream channel, indicating that the recruitment of logs into the stream channel is a long-term process. Time to recruitment into the channel is dependent on log and valley geometry, log size, species, and log condition prior to toppling. Log height above stream was negatively correlated with log decay class and valley width. Log length was negatively correlated with state of decay, and many windthrown logs were in an advanced state of decay before they entered the stream.
机译:为了记录风吹对河岸带的影响,并确定小溪大木屑碎片(LWD)募集模型所需的组件,我们在不列颠哥伦比亚省沿海的温带雨林站点中监测了9条小溪。这项研究是森林管理对小溪流影响的综合研究的一部分。 1998年,在具有70年历史的第二个生长林中收获了一系列小型伐木,该林分在伐木和野火后自然再生。将三个切块分别分配给10m和30m缓冲区宽度处理,将三个区域分配为未收获的对照。在1998年测井的七年后,测量了所有直径至少10cm且至少横跨部分河道宽度的测井。总共记录了179条日志。在10m缓冲液处理中,收获后的扔风较高,而在对照组中,与竞争相关的站立树木死亡率更高。重大风灾事件发生在相邻林分采伐后的第一年和第二年。在10m,30m缓冲液和对照处理中,跨度和流内测井的数量没有显着差异。超过90%的随钻测井属于10至30厘米直径等级。大多数原木垂直于流道定向。在测量时,这些树木中的大多数仍悬吊在河道上方,这表明将原木招募到河道是一个长期的过程。募集到河道的时间取决于倾倒之前的测井和谷底几何形状,测井大小,种类和测井条件。河流上方的原木高度与原木的衰减等级和谷底宽度呈负相关。测井长度与衰减状态呈负相关,许多被风抛弃的测井在进入河流之前处于先进的衰减状态。

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