Spring Diatom Blooming Phases in a Representative Eutrophic Bay of the Three-Gorges Reservoir, China

Xu, Yaoyang; Cai, Qinghua; Ye, Lin; Zhou, Shurong; Han, Xinqin

doi:10.1080/02705060.2009.9664283

Cited by 24 publications

(15 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phytoplankton spring bloom of Site A was dominated by the diatom (A. formosa and Cyclotella spp.) during the whole study period, as reported by Xu et al (2009b), while the dinoflagellate (Peridiniopsis spp. and Chroomonas spp.)…”

Section: Asynchronous Dynamics Of Phytoplanktonsupporting

confidence: 62%

See 1 more Smart Citation

Asynchrony of spring phytoplankton response to temperature driver within a spatial heterogeneity bay of Three-Gorges Reservoir, China

Cai

et al. 2011

Limnologica

Self Cite

View full text Add to dashboard Cite

a b s t r a c tThe increased air temperature is expected to have important driver on spring phytoplankton dynamics. To test whether spatial heterogeneity modifies the synchronous responses of phytoplankton to regional temperature driver, we evaluate temporal coherences for physical factors (temperature, water stability and non-algal light extinction), nutrients (nitrogen, phosphorus and silicon), and biomass and density of phytoplankton by Pearson correlation analysis and synchrony for phytoplankton community dynamics by Mantel test and nonmetric multi-dimensional scaling (NMS), during spring bloom (February 23-April 28, 2005) within Xiangxi Bay, a high spatial gradient bay of Three-Gorges Reservoir (China). The high level of temporal coherences for surface water temperature (r = 0.946, p < 0.01) and relative water column stability (r = 0.750, p < 0.01) were found between pair sites (A and B), in which the increase trends occurred with increase in regional air temperature during the study period. However, the low synchrony for phytoplankton dynamics were indeed observed between Site A and B, especially for the density of common dominant taxa (Cyclotella spp.: r = 0.155, p = 0.388) and community structure (Mantel test: r = 0.351). Moreover, the local habitat characteristics such as nutrient (nitrogen and phosphorus) and non-algal light extinction showed low levels of temporal coherence. It indicated that local community of phytoplankton varies rather independently within the single lentic bay with high spatial heterogeneity and that dispersal of algal organisms among locations cannot overwhelm out these local dynamics. Contrary to many studies, the present results argued that, in a small geographic area (i.e., a single reservoir bay of approximately 24 km length), spatial gradients also may influence spring phytoplankton response to regional temperature driver.

show abstract

Section: Asynchronous Dynamics Of Phytoplanktonsupporting

confidence: 62%

“…Small centric diatoms (about 10 m diameter, disc-like species), mainly consisting of Cyclotella, were combined as one group (Cyclotella spp.) (Xu et al, 2009b). The concentrations of NO3-N, PO4-P and SiO2-Si were analyzed on a segmented flow analyzer (Skalar SAN++, Netherlands) according to the user manual of the instrument.…”

Section: Laboratory Measurementmentioning

confidence: 99%

Asynchrony of spring phytoplankton response to temperature driver within a spatial heterogeneity bay of Three-Gorges Reservoir, China

Cai

et al. 2011

Limnologica

Self Cite

View full text Add to dashboard Cite

show abstract

“…The studies of phytoplankton in TGR were focusing on comparisons of before and after impoundment (Kuang et al 2005), rainy and dry seasons (Zeng et al 2006), and some were in terms of algal bloom events (Xu et al 2009(Xu et al , 2010Wang et al 2010b). The phytoplankton functional groups approach has not been applied in TGR until now.…”

Section: Introductionmentioning

confidence: 99%

Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay

Wang

Cai

et al. 2010

Aquat Ecol

Self Cite

View full text Add to dashboard Cite

In reservoirs, water level fluctuations strongly influence phytoplankton development. However, studies on the response of phytoplankton in the reservoir-bay to water level fluctuations are very scarce, especially in the highly dynamic reservoir system, for instance, the Three Gorges Reservoir (TGR) on the Yangtze River in China. Therefore, we carried out weekly monitoring in a typical tributary bay-Xiangxi Bay of the TGR from March 2008 to March 2009 analyze the dynamics of phytoplankton functional groups, as well as their response to the water level fluctuations and other environmental conditions. The phytoplankton functional groups G (short, nutrient-rich water columns with high light and without nutrient deficiency), M (dielly mixed layers of small eutrophic, low latitude with high insolation and without flushing and low total light) and Lo (summer epilimnia in mesotrophic lakes with segregated nutrients and without prolonged or deep mixing) were the most important in biomass, mainly represented by Pandorina morum and Eudorina elegans, Microcystis aeruginosa, Peridiniopsis niei and Ceratium hirundinella, respectively. The dominant functional groups had close relationships with the water level fluctuations, light and nutrient, etc. Principal components analysis and redundancy analysis indicated that phytoplankton functional groups in Xiangxi Bay were restricted by the mixing regime and other abiotic variables under the influences of the mixing regime. In Xiangxi Bay, the water level fluctuation showed significant correlations with many physicochemical variables, including the mixing depth (r = 0.97, p \ 0.001) and the relative water column stability (r = -0.80, p \ 0.001). The study implied that water level fluctuations had complex influence on environmental changes and selecting for phytoplankton functional groups in a highly dynamic reservoir-bay. The important characteristics of the dominant phytoplankton functional groups in Xiangxi Bay were also discussed.

show abstract

“…Firstly, the nutrient concentrations of the mainstream and Xiangxi Bay both already exceed the threshold values of the eutrophic state (Xu et al, 2009b;Xu et al, 2010a). The research results of Xu et al (2010a) also showed that nutrients (TN and TP) were not considered as the primary factors limiting primary production in the TGR mainstream.…”

Section: Algal Bloomsmentioning

confidence: 98%

Changes in water types under the regulated mode of water level in Three Gorges Reservoir, China

Zhang

Wang

et al. 2011

Quaternary International

Self Cite

View full text Add to dashboard Cite

Spring Diatom Blooming Phases in a Representative Eutrophic Bay of the Three-Gorges Reservoir, China

Cited by 24 publications

References 21 publications

Asynchrony of spring phytoplankton response to temperature driver within a spatial heterogeneity bay of Three-Gorges Reservoir, China

Asynchrony of spring phytoplankton response to temperature driver within a spatial heterogeneity bay of Three-Gorges Reservoir, China

Weekly dynamics of phytoplankton functional groups under high water level fluctuations in a subtropical reservoir-bay

Changes in water types under the regulated mode of water level in Three Gorges Reservoir, China

Contact Info

Product

Resources

About