GROWTH RESPONSES OF PICEA MONGOLICA SAPLINGS TO GOAT BROWSING

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	GROWTH RESPONSES OF PICEA MONGOLICA SAPLINGS TO GOAT BROWSING
	Zou, CJ; Zhang, C; Shimizu, H; Song, Q; Jin, MD; Ma, YL; Xu, WD; Zou, CJ, E China Normal Univ, Shanghai Key Lab Urbanizat & Ecol Restorat, Shanghai 200062, Peoples R China
刊名	ISRAEL JOURNAL OF ECOLOGY & EVOLUTION
	2008
卷号	54 期号:2 页码:193-204
关键词	Picea Mongolica Wd Xu. Goat Browsing Growth Indices Temporal Variation
ISSN号	1565-9801
英文摘要	Picea mongolica W.D. Xu is an endemic and endangered species that is only found in semiarid areas in north China. It has also been Widely used as the forestation tree in China's "Three-North" shelterbelts construction. Although a National Natural Reserve has been Set Up for conserving the rare species, it always suffers from goat browsing, especially during the winter. Dendrochronology analysis is applied to understand the consequences of goat browsing on Picea mongolica's growth. Two sites With different types of trees were chosen side by side to compare the differences between shape, radial growth. height growth. and age of spruce saplings: (1) stunted and heavily browsed spruce Shorter than the browsing limit and (2) escaped spruce that were taller than the browsing limit but still browsed in their lower part. Under repeated and intense browsing, the shape in stunted Spruce was compact and heavily ramified. and the same phenomenon seas shown below the browsing limit in escaped Spruce (1.05 +/- 0.06 m), distinctly different from the shape of escaped spruce above the browsing limit. The results Shoved that the release of browsing pressure, once the tree reached the browsing limit, seas characterized by art abrupt increase in radial growth. Before release, trees showed a growth stagnation characterized by annual rings (0.5 mm per year) and annual height (<5 cm per year) increments. After release. the increments of rings and height were 2 mm and 14 cm each year. respectively. We use this pattern to estimate the release ages and their possible variation over time. Age differences between stunted and escaped Spruce were highly significant and indicate that, despite browsing, most, if not all, trees Will ultimately reach the browsing limit and escape Heavy goat pressure delayed Spruce sapling recruitment by about 10 years. This delay varied in relation to site quality and seemed to have increased over time. Suggesting ail increase in browsing pressure.
学科主题	Ecology ; Evolutionary Biology
语种	英语
WOS记录号	WOS:000262222000005
资助机构	National Nature Science Foundation of China [39900019, 30070129]; Environment Agency of Japan
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54279]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Zou, CJ, E China Normal Univ, Shanghai Key Lab Urbanizat & Ecol Restorat, Shanghai 200062, Peoples R China
推荐引用方式 GB/T 7714	Zou, CJ,Zhang, C,Shimizu, H,et al. GROWTH RESPONSES OF PICEA MONGOLICA SAPLINGS TO GOAT BROWSING[J]. ISRAEL JOURNAL OF ECOLOGY & EVOLUTION,2008,54(2):193-204.
APA	Zou, CJ.,Zhang, C.,Shimizu, H.,Song, Q.,Jin, MD.,...&Zou, CJ, E China Normal Univ, Shanghai Key Lab Urbanizat & Ecol Restorat, Shanghai 200062, Peoples R China.(2008).GROWTH RESPONSES OF PICEA MONGOLICA SAPLINGS TO GOAT BROWSING.ISRAEL JOURNAL OF ECOLOGY & EVOLUTION,54(2),193-204.
MLA	Zou, CJ,et al."GROWTH RESPONSES OF PICEA MONGOLICA SAPLINGS TO GOAT BROWSING".ISRAEL JOURNAL OF ECOLOGY & EVOLUTION 54.2(2008):193-204.