Nutrient Resorption from Leaves of Wetland Plants in a Constructed Wetland Depends on Green Leaf Nutrient Content and Li
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CONSTRUCTED WETLANDS
Nutrient Resorption from Leaves of Wetland Plants in a Constructed Wetland Depends on Green Leaf Nutrient Content and Life Form Xu Pan 1,2,3 & Yunmei Ping 1,2,3 & Lijuan Cui 1,2,3 & Xiaodong Zhang 1,2,3 & Wei Li 1,2,3 & Yukun Hu 1,2,3 & Johannes H. C. Cornelissen 4 Received: 24 September 2019 / Accepted: 26 November 2019 # Society of Wetland Scientists 2019
Abstract Leaf nutrient resorption is a fundamental process, which prevails in nutrient-poor ecosystems. However, few studies have focused on this process in nutrient-rich ecosystems, especially in eutrophic constructed wetland (CWs). Thus, insight into the nutrient resorption processes of different species in CWs might have important implications for wetland restoration and water purification. Here, we assessed the leaf nitrogen and phosphorus resorption efficiencies and proficiencies of 11 plant species (4 floating and 7 emergent plants) from a CW, and related them to both plant functional traits and environmental variables to develop better predictive power of resorption processes across species. Our results showed that emergent and floating plants, respectively, resorbed 37.4% vs. 8.6% N and 50.1% vs. 23.3% P during nutrient resorption in such a nutrient-rich CW. Green leaf nutrient was the best predictor for the nutrient resorption efficiencies and proficiencies in this CW. Interspecific variation in nutrient resorption defines an important strategy for plant nutrient recycling in nutrient-rich wetland ecosystems, and provide a tool for optimizing the efficiency and timing of nutrient capture via foliage harvesting. This link between wetland plant functions and wetland ecosystem services will thus be beneficial for the nutrient management of CWs in future. Keywords Constructed wetlands . Ecosystem services . Nutritional status . Nutrient conservation strategy . Plant functional traits . Wetland plants
Introduction Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13157-019-01256-6) contains supplementary material, which is available to authorized users. * Lijuan Cui [email protected] 1
Present address: Beijing Key Laboratory of Wetland Services and Restoration, Institute of Wetland Research, Chinese Academy of Forestry, No. 1 Dongxiaofu, Xiangshan Road, Haidian District, Beijing 100091, China
2
Beijing Key Laboratory of Wetland Services and Restoration, Beijing 100091, China
3
Beijing Hanshiqiao National Wetland Ecosystem Research Station, Beijing 100091, China
4
Systems Ecology, Department of Ecological Science, Faculty of Science, Vrije Universiteit, 1081 HV Amsterdam, The Netherlands
Nutrient resorption has been considered as one of the most important strategies used by plants to conserve nutrients (Chapin and Kedrowski 1983; Shaver and Melillo 1984; Cote et al. 2002; Rejmánková 2005). It is also an important pathway of internal nutrient cycling within plants, as on average about 50% of maximum foliar N and P content gets recycled internally across a wide range of perennial lif
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