THE REGENERATION OF PIONEER TREE SPECIES UNDER BROWSING PRESSURE OF SIKA-DEER IN AN EVERGREEN OAK FOREST
THE REGENERATION OF PIONEER TREE SPECIES UNDER BROWSING PRESSURE OF SIKA-DEER IN AN EVERGREEN OAK FOREST
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DOI：
10.1007/bf02347245
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发表时间：
1994-04-01
影响因子：
2
通讯作者：
YODA, K
中科院分区：
文献类型：
--
作者：
SHIMODA, K;KIMURA, K;YODA, K
以奈良春日山暖温带万年青橡树林为研究对象，研究了西卡鹿（Cervus nippon）取食对先锋种更新的影响。选择了四个研究地点，三个在林冠间隙，一个在封闭的林冠下，每个地点分为围栏和非围栏地块。在封闭的树冠下，所有的先锋物种的幼苗死亡，无论浏览压力。而在林隙中，先锋树种的幼苗能够很好地建立和生长。林隙内围栏样地的幼苗萌发后1年的成活率> 60%。然而，在未围栏的地块中，只有< 20%的幼苗存活1年，并且在发芽后3年内全部死亡。因此，先锋树在这片森林的更新强烈抑制鹿浏览。在过去的90年里，即使在两次大的风干扰之后，仍然有几年成功地更新了先锋植物，即花椒。 这可能是由于鹿的浏览压力较小。
The effects of Sika deer (Cervus nippon) browsing on the regeneration of pioneer species were studied in relation to canopy gaps in a warm temperate evergreen oak forest in Kasugayama, Nara City. Four study sites, three in canopy gaps and one under a closed canopy, were selected and each divided into fenced and unfenced plots. Under the dosed canopy, seedlings of all the pioneer species died irrespective of browsing pressure. However, in the canopy gap sites, seedlings of the pioneer species could establish and grow well. The seedling survival ratio in the fenced plots in the canopy gaps was > 60% 1 year after germination. However, in the unfenced plots, only < 20% of the seedlings survived 1 year, with all dying within 3 years after germination. Thus, the regeneration of pioneer trees in this forest was strongly inhibited by deer browsing. Successful regeneration of a pioneer, Zanthoxylum ailanthoides, occurred for several years even after two major wind disturbances during the past 90 years. This may be due to less browsing pressure from the deer.