气候变化领域集成服务门户(CCPortal): Rainfall interception and redistribution by a common North American understory and pasture forb; Eupatorium capillifolium (Lam. dogfennel)

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DOI	10.5194/hess-24-4587-2020
	Rainfall interception and redistribution by a common North American understory and pasture forb; Eupatorium capillifolium (Lam. dogfennel)
	Gordon D.A.R.; Coenders-Gerrits M.; Sellers B.A.; Sadeghi S.M.M.; Van Stan J.T.
发表日期	2020
ISSN	1027-5606
起始页码	4587
结束页码	4599
卷号	24 期号:9
英文摘要	In vegetated landscapes, rain must pass through plant canopies and litter to enter soils. As a result, some rainwater is returned to the atmosphere (i.e., interception, I ) and the remainder is partitioned into a canopy (and gap) drip flux (i.e., throughfall) or drained down the stem (i.e., stemflow). Current theoretical and numerical modeling frameworks for this process are almost exclusively based on data from woody overstory plants. However, herbaceous plants often populate the understory and are the primary cover for important ecosystems (e.g., grasslands and croplands). This study investigates how overstory throughfall (PT;o) is partitioned into understory I , throughfall (PT) and stemflow (PS) by a dominant forb in disturbed urban forests (as well as grasslands and pasturelands), Eupatorium capillifolium (Lam., dogfennel). Dogfennel density at the site was 56 770 stems ha1, enabling water storage capacities for leaves and stems of 0:90-0:04 and 0:43-0:02 mm, respectively. As direct measurement of PT;o (using methods such as tipping buckets or bottles) would remove PT;o or disturb the understory partitioning of PT;o, overstory throughfall was modeled (P0 T;o) using on-site observations of PT;o from a previous field campaign. Relying on modeled P0 T;o, rather than on observations of PT;o directly above individual plants means that significant uncertainty remains with respect to (i) small-scale relative values of PT and PS and (ii) factors driving PS variability among individual dogfennel plants. Indeed, PS data from individual plants were highly skewed, where the mean PS V P0 T;o per plant was 36.8 %, but the median was 7.6% (2.8%-27.2% interquartile range) and the total over the study period was 7.9 %. PS variability (n D 30 plants) was high (CV200 %) and may hypothetically be explained by finescale spatiotemporal patterns in actual overstory throughfall (as no plant structural factors explained the variability). The total PT V P0 T;o was 71% (median PT V P0 T;o per gauge was 72 %, with a 59 %-91% interquartile range). Occult precipitation (mixed dew and light rain events) occurred during the study period, revealing that dogfennel can capture and drain dew to their stem base as PS. Dew-induced PS may help explain dogfennel's improved invasion efficacy during droughts (as it tends to be one of the most problematic weeds in the improved grazing systems in the southeastern US). Overall, dogfennel's precipitation partitioning differed markedly from the site's overstory trees (Pinus palustris), and a discussion of the limited literature suggests that these differences may exist across vegetated ecosystems. Thus, more research on herbaceous plant canopy interactions with precipitation is merited. © Author(s) 2020.
语种	英语
scopus关键词	Digital storage; Ecosystems; Rain; Inter quartile ranges; On-site observations; Rainfall interception; Spatiotemporal patterns; Theoretical and numerical modeling; Vegetated ecosystems; Vegetated landscapes; Water storage capacity; Plants (botany); herb; interception; pasture; rainfall; understory; North America; Eupatorium capillifolium; Pinus palustris
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/159302
作者单位	Gordon, D.A.R., Geology and Geography, Georgia Southern University, Statesboro, GA, United States; Coenders-Gerrits, M., Water Resources Section, Delft University of Technology, Delft, Netherlands; Sellers, B.A., Agronomy Department, University of Florida, Gainesville, FL, United States, Range Cattle Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, United States; Sadeghi, S.M.M., Department of Forestry and Forest Economics, University of Tehran, Karaj, Iran; Van Stan, J.T., Applied Coastal Research Lab, Georgia Southern University, Savannah, GA, United States
推荐引用方式 GB/T 7714	Gordon D.A.R.,Coenders-Gerrits M.,Sellers B.A.,et al. Rainfall interception and redistribution by a common North American understory and pasture forb; Eupatorium capillifolium (Lam. dogfennel)[J],2020,24(9).
APA	Gordon D.A.R.,Coenders-Gerrits M.,Sellers B.A.,Sadeghi S.M.M.,&Van Stan J.T..(2020).Rainfall interception and redistribution by a common North American understory and pasture forb; Eupatorium capillifolium (Lam. dogfennel).Hydrology and Earth System Sciences,24(9).
MLA	Gordon D.A.R.,et al."Rainfall interception and redistribution by a common North American understory and pasture forb; Eupatorium capillifolium (Lam. dogfennel)".Hydrology and Earth System Sciences 24.9(2020).