气候变化领域集成服务门户(CCPortal): Neighbourhood and stand structure affect stemflow generation in a heterogeneous deciduous temperate forest

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DOI	10.5194/hess-23-4433-2019
	Neighbourhood and stand structure affect stemflow generation in a heterogeneous deciduous temperate forest
	Metzger J.C.; Schumacher J.; Lange M.; Hildebrandt A.
发表日期	2019
ISSN	1027-5606
起始页码	4433
结束页码	4452
卷号	23 期号:11
英文摘要	Although stemflow oftentimes only represents a small portion of net precipitation in forests, it creates hot spots of water input that can affect subsurface storm-flow dynamics. The distribution of stemflow over different trees is assumed to be temporally stable, yet often unknown. Therefore, it is essential to know the systematic factors driving stemflow patterns. Several drivers have been identified in the past, mainly related to tree traits. However, less attention has been paid to tree neighbourhood interactions impacting stemflow generation and creating stand patches with enhanced or reduced stemflow. We recorded stemflow during 26 precipitation events on 65 trees, growing in 11 subplots (100m2 each), in a temperate mixed beech forest in the Hainich National Park, Germany. We used linear mixed effects models to investigate how traits of individual trees (tree size, tree species, number of neighbouring trees, their basal area and their relative height) affect stemflow and how stemflow is affected by stand properties (stand, biomass and diversity metrics). As expected, stemflow increased with event and tree size. Stemflow was highly variable at both the tree and subplot scale. Especially in large rainfall events (10 mm), the tree/subplot ranking was almost identical between events, probably due to fully developed flow paths bringing out the full stemflow potential of each tree. Neighbourhood and stand structure were increasingly important with event size (15% of fixed effects on the tree scale and ca. 65% on the subplot scale for large events). Subplot-scale stemflow was especially enhanced by a higher proportion of woody surface, expressed by a high number of trees, low leaf area and a large maximum tree size. The Simpson diversity index contributed positively to stemflow yield for large events, probably by allowing more efficient space occupation. Furthermore, our models suggest that the neighbourhood impacts individual tree morphology, which may additionally increase stemflow in dense, species diverse neighbourhoods. Unexpectedly, rain shading within the canopy had little impact on the stemflow spatial variation. Overall, we find a strong cross-scale temporal stability. Tree size and tree density were the main drivers, independently increasing stemflow, creating forest patches with strongly enhanced or reduced stemflow. Our results show that, besides tree metrics, forest structure and tree diversity also affect stemflow patterns and the potentially associated biogeochemical hot spots. © 2019 Author(s).
语种	英语
scopus关键词	Morphology; Rain; Diversity metrics; Fully developed flows; Linear mixed-effects model; Precipitation events; Spatial variations; Subsurface storm flows; Temperate forests; Temporal stability; Forestry; basal area; deciduous forest; deciduous tree; diversity index; neighborhood; precipitation (chemistry); precipitation (climatology); rainfall; stand structure; stemflow; temperate forest; Germany; Hainich National Park; Thuringia; Fagus
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159577
作者单位	Metzger, J.C., Institute of Geoscience, Friedrich Schiller University, Burgweg 11, Jena, 07749, Germany, Max Planck Institute for Biogeochemistry, Hans-Knöll-Straße 10, Jena, 07745, Germany; Schumacher, J., Institute of Mathematics, Friedrich Schiller University, Ernst-Abbe-Platz 2, Jena, 07743, Germany; Lange, M., Max Planck Institute for Biogeochemistry, Hans-Knöll-Straße 10, Jena, 07745, Germany; Hildebrandt, A., Institute of Geoscience, Friedrich Schiller University, Burgweg 11, Jena, 07749, Germany, Max Planck Institute for Biogeochemistry, Hans-Knöll-Straße 10, Jena, 07745, Germany, Helmholtz Centre for Environmental Research-UFZ, Permoserstraße 15, Leipzig, 04318, Germany, German Centre for Integrative Biodiversity Research (IDiv), Deutscher Platz 5e, Leipzig, 04103, Germany
推荐引用方式 GB/T 7714	Metzger J.C.,Schumacher J.,Lange M.,et al. Neighbourhood and stand structure affect stemflow generation in a heterogeneous deciduous temperate forest[J],2019,23(11).
APA	Metzger J.C.,Schumacher J.,Lange M.,&Hildebrandt A..(2019).Neighbourhood and stand structure affect stemflow generation in a heterogeneous deciduous temperate forest.Hydrology and Earth System Sciences,23(11).
MLA	Metzger J.C.,et al."Neighbourhood and stand structure affect stemflow generation in a heterogeneous deciduous temperate forest".Hydrology and Earth System Sciences 23.11(2019).