Abstract
Variability in biomass allocation and growth rate of submersed macrophytes along water depth gradients may lead to different carbon (C), nitrogen (N) and phosphorus (P) stoichiometric characteristics. We conducted a field investigation to evaluate long-term effects of water depth on C, N and P stoichiometry of three submersed macrophytes, Potamogeton maackianus, Myriophyllum spicatum and Ceratophyllum demersum. The results indicated that shoot C:N, C:P and N:P of the plants tended to increase with elevated water depths, and patterns of biomass allocation along water depth gradients were more important than biological dilution of increased growth rates in affecting shoot C:N:P stoichiometric characteristics of the plants. Partial correlation analysis using shoot height and biomass as covariates revealed that water depth significantly affected C:P ratios in shoots of P. maackianus and M. spicatum and C:N ratio in shoots of M. spicatum, but did not affect N:P ratios of all the plants. Shoot stoichiometry of M. spicatum was most sensitive in response to water depth, followed by P. maackianus, and that of C. demersum was really unchanged with elevated water depths. Our results suggested that strategies in biomass allocation in organs, which depend largely on the species identity, rather than growth rates of the plants, contributed mainly to variation in the observed element stoichiometry along the water depth gradients.
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Bai X, Chen KN, Chen XM (2013) Short-time response in growth and sediment properties of Zizania latifolia to water depth. Environ Earth Sci 70:2847–2854
Cao T, Ni L, Xie P, Xu J, Zhang M (2011) Effects of moderate ammonium enrichment on three submersed macrophytes under contrasting light availability. Freshw Biol 56:1620–1629
Chambers PA, Kalff J (1987) Light and nutrients in the control of aquatic plant community structure. I. In situ experiments. J Ecol 75:611–619
Christia C, Papastergiadou E, Papatheodorou G, Geraga M, Papadakis E (2014) Seasonal and spatial variations of water quality, substrate and aquatic macrophytes based on side scan sonar, in an eastern Mediterranean lagoon (Kaiafas, Ionian Sea). Environ Earth Sci 71:3543–3558
Cronin G, Lodge DM (2003) Effects of light and nutrient availability on the growth, allocation, carbon/nitrogen balance, phenolic chemistry, and resistance to herbivory of two freshwater macrophytes. Oecologia 137:32–41
Duarte CM (1992) Nutrient concentrations of aquatic plants: patterns across species. Limnol Oceanogr 37:882–889
Fu H, Yuan G, Cao T, Ni L, Zhang M, Wang S (2012) An alternative mechanism for shade adaptation: implication of allometric responses of three submersed macrophytes to water depth. Ecol Res 27:1087–1094
Güsewell S (2004) N:P ratios in terrestrial plants: variation and functional significance. New Phytol 164:243–266
He J, Wang L, Flynn DFB, Wang X, Ma W, Fang J (2008) Leaf nitrogen: phosphorus stoichiometry across Chinese grassland biomes. Oecologia 155:301–310
He L, Zhu TS, Cao T, Li W, Zhang M, Zhang XL, Ni LY, Xie P (2015) Characteristics of early eutrophication encoded in submerged vegetation beyond water quality: a case study in Lake Erhai. Environ Earth Sci, China. doi:10.1007/s12665-015-4202-4
Huang X (2000) Survey, observation and analysis of lake ecology. Standards Press of China, Beijing (In Chinese)
Krause-Jensen D, Sand-Jensen K (1998) Light attenuation and photosynthesis of aquatic plant communities. Limnol Oceanogr 43:396–407
Kuo S (1996) Phosphorus. In: methods of soil analysis. Part 3: chemical methods. Soil Science Society of America, Wisconsin
Li W, Cao T, Ni L, Zhang XL, Zhu GR, Xie P (2013) Effects of water depth on carbon, nitrogen and phosphorus stoichiometry of five submersed macrophytes in an in situ experiment. Ecol Eng 61:358–365
Ni LY (2001) Effects of water column nutrient enrichment on the growth of Potamogeton maackianus A. Been. J Aquat Plant Manage 39:83–87
Rattray MR, Howard-Williams C, Brown JMA (1991) Sediment and water as sources of nitrogen and phosphorus for submerged rooted aquatic macrophytes. Aquat Bot 40:225–237
Scheffer M, Redelijkheid MR, Noppert F (1992) Distribution and dynamics of submerged vegetation in a chain of shallow eutrophic lakes. Aquat Bot 42:199–216
Song Y, Huang J, Qin B (2010) Effects of epiphyte on the rapid light curves of two submerged macrophytes in Lake Taihu. J Lake Sci 22:935–940 (in Chinese)
Sterner RW, Elser JJ (2002) Ecological stoichiometry: the biology of elements from molecules to the biosphere. Princeton University Press, Princeton
Strand JA, Weisner SEB (2001) Morphological plastic responses to water depth and wave exposure in an aquatic plant (Myriophyllum spicatum). J Ecol 89:166–175
Wang SM, Dou HS (1998) A Directory of Lakes in China. Science Press, Beijing (in Chinese)
Warton DI, Wright IJ, Falster DS, Westoby M (2006) A review of bivariate line-fitting methods for allometry. Biol Rev 81:259–291
Yan X, Yu D, Li YK (2006) The effects of elevated CO2 on clonal growth and nutrient content of submerge plant Vallisneria spinulosa. Chemosphere 62:595–601
Yu Q, Elser JJ, He N, Wu H, Chen Q, Zhang G, Han X (2011) Stoichiometric homeostasis of vascular plants in the Inner Mongolia grassland. Oecologia 166:1–10
Yuan GX, Cao T, Fu H, Ni LY, Zhang XL, Li W, Song X, Xie P, Jeppesen E (2013) Linking carbon and nitrogen metabolism to depth distribution of submersed macrophytes using high ammonium dosing tests and a lake survey. Freshw Biol 58:2532–2540
Zhang M, Cao T, Ni LY, Xie P, Zhu GR, Zhong AW, Xu J, Fu H (2011) Light-dependent phosphate uptake of a submersed macrophyte Myriophyllum spicatum. Aquat Bot 94:151–157
Zhu GR, Li W, Zhang M, Ni LY, Wang SR (2012) Adaptation of submerged macrophytes to both water depth and flood intensity as revealed by their mechanical resistance. Hydrobiologia 696:77–93
Acknowledgments
We appreciate the constructive review comments provided by three anonymous reviewers. This study was supported by the National Science Foundation of China (Grant No. 41230853, 31270508), the National High Technology Research and Development Program of China (Grant No. 2012ZX07105-004) and a project of State Key Laboratory for Freshwater Ecology and Biotechnology (Grant No. 2014FBZ02).
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Li, W., Cao, T., Ni, L. et al. Size-dependent C, N and P stoichiometry of three submersed macrophytes along water depth gradients. Environ Earth Sci 74, 3733–3738 (2015). https://doi.org/10.1007/s12665-015-4295-9
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DOI: https://doi.org/10.1007/s12665-015-4295-9