Foliar nutrient resorption patterns of four functional plants along a precipitation gradient on the Tibetan Changtang Plateau
Zhao, GS; Shi, PL; Wu, JS; Xiong, DP; Zong, N; Zhang, XZ
2017
Source PublicationECOLOGY AND EVOLUTION
ISSN2045-7758
Volume7Issue:18Pages:7201-7212
AbstractNutrient resorption from senesced leaves as a nutrient conservation strategy is important for plants to adapt to nutrient deficiency, particularly in alpine and arid environment. However, the leaf nutrient resorption patterns of different functional plants across environmental gradient remain unclear. In this study, we conducted a transect survey of 12 communities to address foliar nitrogen (N) and phosphorus (P) resorption strategies of four functional groups along an eastward increasing precipitation gradient in northern Tibetan Changtang Plateau. Soil nutrient availability, leaf nutrient concentration, and N:P ratio in green leaves ([N:P](g)) were linearly correlated with precipitation. Nitrogen resorption efficiency decreased, whereas phosphorus resorption efficiency except for sedge increased with increasing precipitation, indicating a greater nutrient conservation in nutrient-poor environment. The surveyed alpine plants except for legume had obviously higher N and P resorption efficiencies than the world mean levels. Legumes had higher N concentrations in green and senesced leaves, but lowest resorption efficiency than nonlegumes. Sedge species had much lower P concentration in senesced leaves but highest P resorption efficiency, suggesting highly competitive P conservation. Leaf nutrient resorption efficiencies of N and P were largely controlled by soil and plant nutrient, and indirectly regulated by precipitation. Nutrient resorption efficiencies were more determined by soil nutrient availability, while resorption proficiencies were more controlled by leaf nutrient and N:P of green leaves. Overall, our results suggest strong internal nutrient cycling through foliar nutrient resorption in the alpine nutrient-poor ecosystems on the Plateau. The patterns of soil nutrient availability and resorption also imply a transit from more N limitation in the west to a more P limitation in the east Changtang. Our findings offer insights into understanding nutrient conservation strategy in the precipitation and its derived soil nutrient availability gradient.
SubtypeJournal
Keywordenvironmental controls leaf nutrient resorption N:P nitrogen and phosphorus plant functional group precipitation gradient soil nutrient availability stoichiometry Tibetan Changtang Plateau
Subject AreaEnvironmental Sciences & Ecology ; Evolutionary Biology
WOS Subject ExtendedEcology ; Evolutionary Biology
WOS KeywordSTRUCTURAL EQUATION MODEL ; NITROGEN RESORPTION ; NORTHERN CHINA ; SEMIARID ECOSYSTEMS ; TERRESTRIAL PLANTS ; SENESCING LEAVES ; SOIL-NITROGEN ; DESERT SHRUB ; LEAF-N ; PHOSPHORUS
Indexed BySCI
Language英语
WOS IDWOS:000411341800007
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44009
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zhao, GS,Shi, PL,Wu, JS,et al. Foliar nutrient resorption patterns of four functional plants along a precipitation gradient on the Tibetan Changtang Plateau[J]. ECOLOGY AND EVOLUTION,2017,7(18):7201-7212.
APA Zhao, GS,Shi, PL,Wu, JS,Xiong, DP,Zong, N,&Zhang, XZ.(2017).Foliar nutrient resorption patterns of four functional plants along a precipitation gradient on the Tibetan Changtang Plateau.ECOLOGY AND EVOLUTION,7(18),7201-7212.
MLA Zhao, GS,et al."Foliar nutrient resorption patterns of four functional plants along a precipitation gradient on the Tibetan Changtang Plateau".ECOLOGY AND EVOLUTION 7.18(2017):7201-7212.
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