Habitat Selection by Ijima's Willow Warbler Phylloscopus ijimae on Miyake-jima, Japan
Habitat Selection by Ijima's Willow Warbler Phylloscopus ijimae on Miyake-jima, Japan
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日本三宅岛井岛柳莺 ijimae 的栖息地选择
DOI：
10.3838/jjo.49.113
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
H. Higuchi
中科院分区：
文献类型：
--
作者：
M. Takagi;H. Higuchi
在西太平洋伊豆群岛的三宅岛研究了伊岛柳莺（Phylloscopus ijimae）的生境选择。为了探讨林莺的密度与景观的关系，我们在不同的景观中选择了3个研究点，比较了它们的密度。森林类型对林莺密度没有影响。在被农田严重分割的地点，莺的密度最低。在50 m × 50 m样方的精细尺度上对林莺生境进行了分析，并采用逐步多元回归分析了林莺密度与植被特征的关系。分析采用高树盖度、森林边缘长度和森林类型3个因子作为解释变量。在小尺度上，发育良好的连续月桂林对伊岛柳莺的承载密度最大。本研究结果表明，Ijima的柳莺特别与发达的连续森林有关，月桂林比落叶林更适合它们的栖息地。
Habitat selection by Ijima's Willow Warblers Phylloscopus ijimae was studied on Miyake-jima (Miyake Island) in the Izu Islands, in the western Pacific Ocean. In order to investigate the relationship between the density of warblers and landscape, we selected three study sites in different landscapes, and compared the density of warblers among them. Forest type did not influence warbler density. The lowest density of warblers was recorded at the site that was heavily fragmented by agricultural fields. Warbler habitat was analysed at a fine scale (50 m x 50 m quadrats), and a stepwise multiple regression analysis was employed to analyse the relationship between warbler density and the vegetation characters. Three factors, tall tree cover, forest edge length, and forest type were adopted as explanatory variables by the analysis. At the fine scale, well-developed continuous laurel forests have the greatest carrying capacity density of for Ijima's Willow Warblers. The results of this study show that Ijima's Willow Warblers are particularly associated with welldeveloped continuous forests, and that laurel forest provides more suitable habitat for them than does deciduous forest.