Indirect effects of excessive deer browsing through understory vegetation on stream insect assemblages
Indirect effects of excessive deer browsing through understory vegetation on stream insect assemblages
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过多的鹿浏览林下植被对溪流昆虫群落的间接影响
DOI：
10.1007/s10144-011-0278-1
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发表时间：
2012
影响因子：
1.7
通讯作者：
Makoto Kato
中科院分区：
文献类型：
--
作者：
Masaru Sakai;Yosihiro Natuhara;Ayumi Imanishi;Kensuke Imai;Makoto Kato
在过去的十年里，梅花鹿的数量在日本各地迅速增加。此前的研究表明，鹿的过多会导致森林林下植被的急剧减少，导致过度的土壤侵蚀。然而，还没有研究调查过多的鹿觅食通过底泥径流对水生昆虫群落的影响。这些效应对于了解鹿引起的陆地变化是否会影响水生生态系统很重要。在京都阿修市的一个主要落叶森林集水区，自2006年以来一直设置了鹿隔离围栏。我们比较了2008年5月至2009年4月在鹿舍内外的一级溪流和集水区的森林覆盖率、陆面径流、溪流环境和水生昆虫群落。鹿圈内的地面被郁郁葱葱的林下植被覆盖，而外面几乎是光秃秃的。坡面中部坡面径流量和细颗粒泥沙淤积占优势，河床外高于河床内。在水生昆虫中，对细微沉积物沉积具有耐受性的洞穴昆虫，其外部明显多于内部，而粘性昆虫则表现出相反的模式。以细碎碎屑为食的收集器-采集器在室外明显比在室内丰富。与此同时，内部的过滤器更加丰富。水生昆虫群落的Simpson多样性指数内部高于外部。这些结果表明，由于鹿的过度觅食，林下植被的死亡间接导致了该流域水生昆虫群落的变化，这是通过增加泥沙径流和随后的河床沙质沉积来实现的。
Over the past decade, the abundance of sika deer has rapidly increased around Japan. Previous studies have showed overabundance of deer causes drastic reduction of forest understory vegetation, leading excessive soil erosion. However, no study has investigated the effects of excessive deer browsing on aquatic insect assemblages via sediment runoff. These effects are important to understand whether the terrestrial alteration by deer influences aquatic ecosystems. In a primary deciduous forest catchment in Ashiu, Kyoto, a deer exclusion fence has been in place since 2006. We compared forest floor cover, overland flow, stream environment, and aquatic insect assemblages in first-order streams and catchments inside and outside of the deer-exclosure from May-2008 to April-2009. The floor inside the deer-exclosure catchment was covered by lush understory vegetation, whereas outside was almost bare. The overland flow runoff rate at midslope and the dominancy of fine sediment deposition in the streambed were higher outside than inside. Among aquatic insects, burrowers, which are tolerant against fine sediment deposition, were significantly more abundant outside than inside, whereas clingers exhibited the opposite patterns. Collector-gatherers, which feed on fine detritus, were significantly more abundant outside than inside. Meanwhile, filterers were more abundant inside. The Simpson’s diversity index of the aquatic insect assemblages was higher inside than outside. These results suggest that the demise of understory vegetation due to excessive deer browsing has indirectly caused changes in the aquatic insect assemblages of this catchment via increased sediment runoff and subsequent sandy sedimentation of the streambed.
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影响因子：
1.7
作者：
J. Lyon;C. Sagers
通讯作者：
C. Sagers
利用底栖无脊椎动物对沉积物进行生物监测：对密苏里州 4 条溪流进行的测试
影响因子：
--
作者：
Leanna D. Zweig;C. Rabení
通讯作者：
C. Rabení
森林地面凋落物层数量和土壤侵蚀的季节变化
DOI：
10.4005/jjfs.90.378
发表时间：
2008
期刊：
Journal of The Japanese Forest Society
影响因子：
--
作者：
T. Wakahara;Y. Ishikawa;K. Shiraki;H. Toda;T. Miya;F. Kataoka;Masakazu Suzuki;Y. Uchiyama
通讯作者：
Y. Uchiyama
影响因子：
1.5
作者：
H. Furusawa;H. Miyanishi;Shinji Kaneko;Teruaki Hino;turbinata Blume;Shingo Taniguchi;Hayato Hashizume
通讯作者：
Hayato Hashizume
日本中部河岸落叶林森林地面植被和树木再生对鹿排斥和干扰的反应
影响因子：
1.7
作者：
Haruto Nomiya;W. Suzuki;T. Kanazashi;M. Shibata;Hiroshi Tanaka;T. Nakashizuka
通讯作者：
T. Nakashizuka