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Effects of plant size on the growth of the submersed macrophyteVallisneria spinulosaSZYan at different light intensities: implications for lake restoration
Date
2020-10-01
Author
Yuan, Guixiang
Fu, Hui
Zhang, Meihong
Lou, Qian
Dai, Taotao
Jeppesen, Erik
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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The growth and reproduction of plants are highly size-dependent and markedly affected by light intensity.Vallisneria spinulosaS.Z.Yan is a common submersed macrophyte and is widely used in current lake restoration projects. The size of plants to be used to get optimal restoration results is not known, however, and may vary with water clarity. In this study, the effects of different plant sizes (large, medium and small, i.e. approximately 2.40 g, 1.01 g and 0.27 g per plant) on the growth and reproduction ofV. spinulosawere tested under three light intensities (high, medium, low, i.e. 25%, 6% and 1% of full sunlight, respectively). Both plant size and light intensity were found to be of great significance for plant growth and reproduction. The relative growth rate (RGR) of biomass was higher for small than for large plants at both high and low light, while the absolute growth rate (AGR) of biomass was higher for large-sized plants at medium and high light intensity. Asexual reproduction ofV. spinulosawas positively correlated with plant size and more affected by plant size than by light intensity, while sexual reproduction was most affected by light intensity. RGR and AGR of plant height were highest for medium-sized plants at moderate light intensity. Therefore, the size of submersed macrophytes should be considered when using this species in connection with lake restoration. Verification of our results under field conditions is needed, though, before firm conclusions can be reached about the optimal plant size ofV. spinulosato be used in lake restoration as also other factors like, e.g. periphyton shading and wave actions may play a role.
Subject Keywords
Aquatic Science
,
Pollution
,
General Environmental Science
URI
https://hdl.handle.net/11511/68373
Journal
HYDROBIOLOGIA
DOI
https://doi.org/10.1007/s10750-020-04374-z
Collections
Department of Biology, Article
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G. Yuan, H. Fu, M. Zhang, Q. Lou, T. Dai, and E. Jeppesen, “Effects of plant size on the growth of the submersed macrophyteVallisneria spinulosaSZYan at different light intensities: implications for lake restoration,”
HYDROBIOLOGIA
, pp. 3609–3619, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68373.