GSTDTAP  > 气候变化
DOI10.3354/cr01431
Feedback effects of clonal groups and tree clusters on site conditions at the treeline: implications for treeline dynamics
Holtmeier, Friedrich-Karl1; Broll, Gabriele2
2017
发表期刊CLIMATE RESEARCH
ISSN0936-577X
EISSN1616-1572
出版年2017
卷号73
文章类型Article
语种英语
国家Germany
英文摘要

The article examines interactions between closely spaced clonal tree groups (spruce, fir, mountain birch) and dense tree clusters and their environment with special regard to Northern Europe, the Alps, and the Rocky Mountains. Modification of wind velocity and direction, trapping blowing snow and eolian dust, ground-shading and the release of sensible heat to the immediate vicinity ('black-body effect') are the main direct feedback effects of grouped trees on site conditions. Under long-lived clonal groups, soil physical and chemical properties gradually change. Clonal groups also leave their marks in geomorphic micro-structures. Compact groups may facilitate establishment of tree seedlings by providing shelter. Under global warming, the existing clonal groups above the forest limit may act as 'new' sources of viable seed that facilitate infilling of gaps in the treeline ecotone and the establishment of new tree populations above the present tree limit. On the other hand, increased deposition of snow as a result of the presence of tree groups may affect seedling establishment, and thereby overrule the positive effects of climate warming. If climate warming continues, current spatial structures, surface roughness, albedo, and snow distribution pattern, along with the resulting effects of these factors, will change across the entire ecotone. The feedback effects of closely spaced clonal groups will spatially overlap. Thus, it will be hard to distinguish between the effects of the single groups when new trees become established within the existing gaps. The northward shift of the polar treeline ecotone might contribute to heating of the lower atmosphere. On steep high-mountain slopes, however, no similar effects can be expected because of the limited size of the lower alpine area that has the potential to become covered with new forest and tree stands.


英文关键词Clonal groups Spruce Fir Mountain birch Black-body effect Wind Snowpack Treeline pattern
领域气候变化
收录类别SCI-E
WOS记录号WOS:000408250000009
WOS关键词MOUNTAIN BIRCH SEEDLINGS ; GLACIER NATIONAL-PARK ; ALPINE TUNDRA ECOTONE ; FRONT RANGE ; PICEA-ENGELMANNII ; SNOW REDISTRIBUTION ; POSITIVE FEEDBACK ; ABIES-LASIOCARPA ; ROCKY-MOUNTAINS ; SPATIAL-PATTERN
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
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/38614
专题气候变化
作者单位1.Westfalische Wilhelms Univ, Inst Landscape Ecol, Heisenbergstr 2, D-48149 Munster, Germany;
2.Univ Osnabruck, Inst Geog, Seminarstr 19 A-B, D-49074 Osnabruck, Germany
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Holtmeier, Friedrich-Karl,Broll, Gabriele. Feedback effects of clonal groups and tree clusters on site conditions at the treeline: implications for treeline dynamics[J]. CLIMATE RESEARCH,2017,73.
APA Holtmeier, Friedrich-Karl,&Broll, Gabriele.(2017).Feedback effects of clonal groups and tree clusters on site conditions at the treeline: implications for treeline dynamics.CLIMATE RESEARCH,73.
MLA Holtmeier, Friedrich-Karl,et al."Feedback effects of clonal groups and tree clusters on site conditions at the treeline: implications for treeline dynamics".CLIMATE RESEARCH 73(2017).
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