Nutrient resorption of coexistence species in alpine meadow of the Qinghai-Tibetan Plateau explains plant adaptation to nutrient-poor environment

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	Nutrient resorption of coexistence species in alpine meadow of the Qinghai-Tibetan Plateau explains plant adaptation to nutrient-poor environment
	Jiang, Chunming 1,2; Yu, Guirui 2; Li, Yingnian 3; Cao, Guangmin 3; Yang, ZhaoPing 4; Sheng, Wenping 2; Yu, Wantai 1
	2012-07-01
发表期刊	ECOLOGICAL ENGINEERING
ISSN	0925-8574
卷号	44 页码:1-9
文章类型	Article
摘要	Nitrogen (N) and phosphorus (P) resorption from senescing organs are important plant nutrient conservation mechanisms. However, whether nutrient resorption can indicate plant adaptation to nutrient-poor environment remains a controversy. We quantified nutrient resorption efficiency of major species in an alpine meadow of the Qinghai-Tibetan Plateau. N and P resorption for these species averaged 65.2% and 67.4%, respectively, which was at the high end of the values of global scale. Among three life forms, sedges contained least N and P and had highest resorption efficiency, indicating sedges had a competitive advantage over grasses and forbs in this nutrient-poor environment. This result was consistent with the fact that sedge was the typically dominant plant functional group in Qinghai-Tibetan Plateau. By fitting the allometric equations ([ nutrient](senescent) = A([nutrient](live))(B)) separately for N and P, we found much smaller B (N) than B (P), which suggested that relative to the resorption from senescent leaves, the cost of N uptake from soils increased more quickly than that of P as resource availability decreased. This phenomenon was contrary to the corresponding N and P acquisition pattern of the tropical ecosystem, which matched the large geographical gradients of N vs. P limitation (N for alpine ecosystem, while P for tropical ecosystem). This study suggests that surveying leaf nutrient concentration and resorption could provide indicative information about plant adaptation to nutrient-poor soil within and across ecosystems. Our finding offers insights to nutrient management and ecosystem restoration in nutrient-poor environment and delivers information for upcoming meta-studies and model simulation of global leaf nutrient resorption. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.; Nitrogen (N) and phosphorus (P) resorption from senescing organs are important plant nutrient conservation mechanisms. However, whether nutrient resorption can indicate plant adaptation to nutrient-poor environment remains a controversy. We quantified nutrient resorption efficiency of major species in an alpine meadow of the Qinghai-Tibetan Plateau. N and P resorption for these species averaged 65.2% and 67.4%, respectively, which was at the high end of the values of global scale. Among three life forms, sedges contained least N and P and had highest resorption efficiency, indicating sedges had a competitive advantage over grasses and forbs in this nutrient-poor environment. This result was consistent with the fact that sedge was the typically dominant plant functional group in Qinghai-Tibetan Plateau. By fitting the allometric equations ([ nutrient](senescent) = A([nutrient](live))(B)) separately for N and P, we found much smaller B (N) than B (P), which suggested that relative to the resorption from senescent leaves, the cost of N uptake from soils increased more quickly than that of P as resource availability decreased. This phenomenon was contrary to the corresponding N and P acquisition pattern of the tropical ecosystem, which matched the large geographical gradients of N vs. P limitation (N for alpine ecosystem, while P for tropical ecosystem). This study suggests that surveying leaf nutrient concentration and resorption could provide indicative information about plant adaptation to nutrient-poor soil within and across ecosystems. Our finding offers insights to nutrient management and ecosystem restoration in nutrient-poor environment and delivers information for upcoming meta-studies and model simulation of global leaf nutrient resorption. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
关键词	Leaf Nutrient Concentration Nutrient Resorption Allometric Equations Alpine Meadow Qinghai-tibetan Plateau
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Technology
关键词[WOS]	ORGANIC NITROGEN ; PHOSPHORUS STOICHIOMETRY ; LEAF NITROGEN ; FUNCTIONAL-SIGNIFICANCE ; TERRESTRIAL ECOSYSTEMS ; MINERAL-NUTRITION ; GRASSLAND BIOMES ; SCALE PATTERNS ; ARCTIC PLANTS ; WILD PLANTS
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Engineering
WOS类目	Ecology ; Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000305443100001
引用统计	被引频次：54[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/3648
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Synth Res Ctr Chinese Ecosyst Res Network, Beijing 100101, Peoples R China 3.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810008, Peoples R China 4.Minist Environm Protect, Nanjing Inst Environm Sci, Nanjing 210042, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Chunming,Yu, Guirui,Li, Yingnian,et al. Nutrient resorption of coexistence species in alpine meadow of the Qinghai-Tibetan Plateau explains plant adaptation to nutrient-poor environment[J]. ECOLOGICAL ENGINEERING,2012,44:1-9.
APA	Jiang, Chunming.,Yu, Guirui.,Li, Yingnian.,Cao, Guangmin.,Yang, ZhaoPing.,...&Yu, Wantai.(2012).Nutrient resorption of coexistence species in alpine meadow of the Qinghai-Tibetan Plateau explains plant adaptation to nutrient-poor environment.ECOLOGICAL ENGINEERING,44,1-9.
MLA	Jiang, Chunming,et al."Nutrient resorption of coexistence species in alpine meadow of the Qinghai-Tibetan Plateau explains plant adaptation to nutrient-poor environment".ECOLOGICAL ENGINEERING 44(2012):1-9.

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