GSTDTAP  > 气候变化
DOI10.1016/j.foreco.2017.11.002
Competition for water in a xeric forest ecosystem - Effects of understory removal on soil micro-climate, growth and physiology of dominant Scots pine trees
Giuggiola, Arnaud1,2; Zweifel, Roman1; Feichtinger, Linda M.1; Vollenweider, Pierre1; Bugmann, Harald2; Haeni, Matthias1; Rigling, Andreas1,2
2018-02-01
发表期刊FOREST ECOLOGY AND MANAGEMENT
ISSN0378-1127
EISSN1872-7042
出版年2018
卷号409页码:241-249
文章类型Article
语种英语
国家Switzerland
英文摘要

In many Central European areas, forests have been altered by century-long management practices, including grazing with domestic ungulates and litter harvesting. During the last century, most of these agro-forestry practices have been abandoned in many regions of Switzerland. As a consequence, stand density has increased, leading to higher competition for resources among trees, and particularly between overstory trees and understory vegetation. Only few studies investigated the effects of understory on the growth and physiology of overstory trees.


We conducted an understory removal experiment at a xeric Scots pine (Pinus sylvestris L.) forest in an inner Alpine valley of Switzerland over a period of 5 years and compared data of soil temperature and water content, needle and shoot length, and radial growth and sap flow.


The removal of the understory increased soil temperature as well as soil water content at 5 to 60 cm soil depth, and led to a 4.6-fold higher mean annual radial growth and significantly longer needles and shoots. The removal of the understory further decreased tree water deficit and increased sap flow.


We conclude that reduced competition for soil water after removal of the understory vegetation was the primary cause of the increased performance of the overstory trees since light was not a limiting factor already before the understory removal. Thus, increases in understory density due to altered forest management may have exacerbated observed drought-induced decline processes. Therefore, our study demonstrates the need for a careful disentangling of climate and land-use change processes as they may evolve in parallel and potentially intensify their impact on the ecosystems. In contrast, the findings suggest decreasing understory density as a suitable management practice to increase overstory tree growth and vigour, and hence reduce mortality risk for a species like Scots pine in a drought-prone environment.


英文关键词Competition Drought stress Forest management Land-use change Predawn water potential Sap flow Stem growth Tree physiology
领域气候变化
收录类别SCI-E
WOS记录号WOS:000425578000024
WOS关键词LAND-USE CHANGE ; NORWAY SPRUCE ; DROUGHT STRESS ; VEGETATION ; MORTALITY ; RESPONSES ; PONDEROSA ; STAND ; TRANSPIRATION ; MICROCLIMATE
WOS类目Forestry
WOS研究方向Forestry
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/24022
专题气候变化
作者单位1.Swiss Fed Res Inst Forest Snow & Landscape WSL, Forest Dynam, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland;
2.Swiss Fed Inst Technol, Inst Terr Ecosyst, Univ Str 16, CH-8092 Zurich, Switzerland
推荐引用方式
GB/T 7714
Giuggiola, Arnaud,Zweifel, Roman,Feichtinger, Linda M.,et al. Competition for water in a xeric forest ecosystem - Effects of understory removal on soil micro-climate, growth and physiology of dominant Scots pine trees[J]. FOREST ECOLOGY AND MANAGEMENT,2018,409:241-249.
APA Giuggiola, Arnaud.,Zweifel, Roman.,Feichtinger, Linda M..,Vollenweider, Pierre.,Bugmann, Harald.,...&Rigling, Andreas.(2018).Competition for water in a xeric forest ecosystem - Effects of understory removal on soil micro-climate, growth and physiology of dominant Scots pine trees.FOREST ECOLOGY AND MANAGEMENT,409,241-249.
MLA Giuggiola, Arnaud,et al."Competition for water in a xeric forest ecosystem - Effects of understory removal on soil micro-climate, growth and physiology of dominant Scots pine trees".FOREST ECOLOGY AND MANAGEMENT 409(2018):241-249.
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