Arid
DOI10.3389/fpls.2018.00248
Mini-Review: Stemflow as a Resource Limitation to Near-Stem Soils
Van Stan, John T.; Gordon, Dennis A.
通讯作者Van Stan, John T.
来源期刊FRONTIERS IN PLANT SCIENCE
ISSN1664-462X
出版年2018
卷号9
英文摘要

Stemflow, a precipitation and solute supply to soils near tree stems, can play a wide array of roles in ecosystem functioning. However, stemflow’s ecohydrological functions have been primarily studied in forests with voluminous stemflow because resource subsidy is currently considered stemflow’s only impact on near-stem soils. This common assumption ignores controls that stemflow generation may exert via resource limitation (when stemflow < open rainfall and near-stem throughfall is negligible). We reviewed selected literature across numerous forests to evaluate the predominance of stemflow as a potential resource limitation to near-stem soils and characterized the concentrated, but meager, solute flux from low stemflow generators. Global observations of stemflow were highly skewed (skewness = 4.6) and leptokurtic (kurtosis = 28.8), where 69% of observations were <= 2% of rainfall. Stemflow <= 2% of rainfall is 10-100 times more chemically enriched than open rainfall, yet low volumes result in negligible solute fluxes (under 1 g m(-2) y(-1)). Reduced stemflow may be the global and regional norm, creating persistently dry near-stem soils that receive infrequent, salty, and paltry precipitation flux if throughfall is also low. Ignoring stemflow because it results in scarcity likely limits our understanding of ecosystem functioning as resource limitations alter the fate of soil nutrients, energy flows, and spatial patterning of biogeochemical processes.


英文关键词ecohydrology stemflow forest ecology plant-soil interactions arid environment
类型Review
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000426171500001
WOS关键词SPRUCE PICEA-ABIES ; SPATIAL-PATTERNS ; NUTRIENT FLUXES ; ATMOSPHERIC DEPOSITION ; DESICCATION-TOLERANCE ; SOLUTION CHEMISTRY ; PREFERENTIAL FLOW ; INTERCEPTION LOSS ; ORGANIC-MATTER ; DESERT SHRUBS
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209465
作者单位Georgia Southern Univ, Geol & Geog, Statesboro, GA 30460 USA
推荐引用方式
GB/T 7714
Van Stan, John T.,Gordon, Dennis A.. Mini-Review: Stemflow as a Resource Limitation to Near-Stem Soils[J],2018,9.
APA Van Stan, John T.,&Gordon, Dennis A..(2018).Mini-Review: Stemflow as a Resource Limitation to Near-Stem Soils.FRONTIERS IN PLANT SCIENCE,9.
MLA Van Stan, John T.,et al."Mini-Review: Stemflow as a Resource Limitation to Near-Stem Soils".FRONTIERS IN PLANT SCIENCE 9(2018).
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