Temporal and spatial distribution of phytoplankton functional groups and role of environment factors in a deep subtropical reservoir
- 109 Downloads
Phytoplankton and environment factors were investigated in 2015 and phytoplankton functional groups were used to understand their temporal and spatial distribution and their driving factors in Wanfeng Reservoir. Seventeen functional groups (B, D, E, F, G, J, Lo, MP, P, S1, T, W1, W2, X1, X2, Xph, Y) were identified based on 34 species. The dominant groups were: J/B/P/D in dry season, X1/J/Xph/G/T in normal season and J in flood season. Phytoplankton abundance ranged from 5.33×104 cells/L to 3.65×107 cells/L, with the highest value occurring in flood season and lowest in dry season. The vertical profile of dominant groups showed little differentiation except for P, which dominated surface layers over 20 m as a result of mixing water masses and higher transparency during dry season. However, the surface waters presented higher values of phytoplankton abundance than other layers, possibly because of greater irradiance. The significant explaining variables and their ability to describe the spatial distribution of the phytoplankton community in RDA differed seasonally as follows: dry season, NH4-N, NO3-N, NO2-N, TN:TP ratio and transparency (SD); normal season, temperature (WT), water depth, TN, NH4-N and NO3-N; flood season, WT, water depth, NO3-N and NO2-N. Furthermore, nitrogen, water temperature, SD and water depth were significant variables explaining the variance of phytoplankton communities when datasets included all samples. The results indicated that water physical conditions and hydrology were important in phytoplankton community dynamics, and nitrogen was more important than phosphorus in modifying phytoplankton communities. Seasonal differences in the relationship between the environment and phytoplankton community should be considered in water quality management.
Keywordphytoplankton functional groups temporal and spatial distribution growth strategy driving factors Wanfeng Reservoir
Unable to display preview. Download preview PDF.
We thank professor LI for funding support. We also thank our colleagues for assisting with fieldwork and laboratory experiments.
- Borics G, Várbiró G, Grigorszky I, Krasznai E, Szabo S, Kiss K T. 2007. A new evaluation technique of potamoplankton for the assessment of the ecological status of rivers. Large Rivers, 17 (3–4): 466–486.Google Scholar
- Chen L L, Li Q H, Teng M D, Liu S P, Zhang M S. 2011. Cyanobacteria composition and microcystins distribution of Wanfeng Reservoir and Baihua Reservoir on Guizhou Plateau. Ecology and Environmental Sciences, 20 (6-7): 1 068–1 074. (in Chinese with English abstract)Google Scholar
- Hu H J, Wei Y X. 2006. The Freshwater Algae of China: Systematics, Taxonomy and Ecology. Science Press, Beijing. (in Chinese)Google Scholar
- Huang G J, Li Q H, Chen C, Wang A P, Yang M, Zhang L, Ou T. 2015. Phytoplankton functional groups and their spatial and temporal distribution characteristics in Sanbanxi Reservoir, Guizhou Province. Acta Scientiae Circumstantiae, 35 (2): 418–428. (in Chinese with English abstract)Google Scholar
- Jarvie H P, Neal C, Leach D V, Ryland G P, House W A, Robson A J. 1997. Major ion concentrations and the inorganic carbon chemistry of the Humber Rivers. Science of the Total Environment, 194-195: 195–285.Google Scholar
- Kong F X, Gao G. 2005. Hypothesis on cyanobacteria bloomforming mechanism in large shallow eutrophic lakes. Acta Ecologica Sinica, 25 (3): 589–596. (in Chinese with English abstract)Google Scholar
- Li L, Li Q H, Jiao S L, Li Y, Deng L, Sun R G, Gao Y C, Luo L. 2015. Spatial and temporal distribution characteristics of phytoplankton functional groups in aha reservoir and their influencing factors. Acta Scientiae Circumstantiae, 35 (11): 3 604–3 611. (in Chinese with English abstract)Google Scholar
- Li Q H, Shang L H, Li G H, Feng X B, Yan H Y. 2011. Temporal and spatial characteristics of phytoplankton community in Wanfeng Reservoir. Chinese Journal of Ecology, 30 (5): 1 031–1 038. (in Chinese with English abstract)Google Scholar
- Reynolds C S. 1984. The Ecology of Freshwater Phytoplankton. Cambridge University Press, London.Google Scholar
- Reynolds C S. 1997. Vegetation Processes in the Pelagic: A Model for Ecosystem Theory. Ecology Institute, Germany. p.205-289.Google Scholar
- Reynolds C S. 1998. What factors influence the species composition of phytoplankton in lakes of different trophic status? Hydrobiologia, 369: 369–711.Google Scholar
- Reynolds C S. 2006. The Ecology of Phytoplankton. Cambridge University Press, London.Google Scholar
- Wu A Q, Guo N, Qin X B. 2015. Seasonal variation of phytoplankton functional groups and their relationship with environmental factors in a typical cold regions wetland. Acta Scientiae Circumstantiae, 35 (5): 1 341–1 349. (in Chinese with English abstract)Google Scholar