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Hydrobiologia

, Volume 787, Issue 1, pp 205–215 | Cite as

Effects of sediment-borne nutrient and litter quality on macrophyte decomposition and nutrient release

  • Miao Wang
  • Tao Hao
  • Xuwei Deng
  • Zhengxiang Wang
  • Zhaohui Cai
  • Zhongqiang Li
Primary Research Paper

Abstract

Macrophyte decomposition is a critical process that affects carbon and nutrient cycling, and energy flow, although the majority of the details involved in the process remain unclear. For the present study, a litter bag experiment was conducted to investigate the effects of sediment-borne nutrient and litter quality on the decomposition rates and nutrient release of four macrophyte life forms (emergent macrophyte: Phragmites australis, free-floating macrophyte: Hydrocharis dubia, floating-leaved macrophyte: Nymphoides peltata, submerged macrophyte: Ceratophyllum demersum), and a species mixture. Our results indicated that litter quality significantly influenced macrophyte decomposition and nutrient release. High-quality litter species (high initial nitrogen and phosphorus contents, as well as low C:N, C:P, and N:P ratios) decomposed more rapidly than low-quality litter species, and the initial C:N and C:P ratios, rather than the initial N and P contents, were effective indicators of the decomposition rate of macrophytes. Sediment-borne nutrients had little effect on the decomposition rate, yet a strong effect on the release of N and P, although the interactions between litter quality and sediment-borne nutrients significantly affected the decomposition rate. Three-way ANOVA analysis revealed that the litter quality imparted a more potent effect on the macrophyte decomposition rate and release of N and P than sediment-borne nutrients. These results implied that litter quality interacts with sediment-borne nutrients and may control macrophyte decomposition in shallow lakes.

Keywords

Decomposition N and P release Sediment-borne nutrient Litter quality Macrophytes 

Notes

Acknowledgments

This study was supported by the National Natural Science Foundation of China (31270261) and (31570366).

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Province Key Laboratory of Regional Development and Environmental Response, Faculty of Resources and EnvironmentHubei UniversityWuhanChina
  2. 2.Wildlife Conservation Chief Station of Hubei ProvinceWuhanChina
  3. 3.School of Nuclear Technology and Chemistry & BiologyHubei University of Science and TechnologyXianningChina

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