Spatial and temporal variations of picoplankton in three contrasting periods in the Pearl River Estuary, South China

Zhang, Xia; Z, Shi; Liu, Qingxia; Ye, Feng; Tian, Lei; Huang, Xiaoping

doi:10.1016/j.csr.2013.01.015

Cited by 25 publications

(21 citation statements)

References 61 publications

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“…This is the first study, to our knowledge, to evaluate the microbial community structure based on flow cytometry characteristics in Daya Bay waters. Heterotrophic prokaryote abundances (14.55, range (3.61-19.56) × 10 5 cells/mL) in Daya Bay are comparable to those reported by Hamasaki et al (1999) for Sagami Bay and lower than those reported by Koepfler et al (1993) for the Chesapeake Bay and Bai et al (2004) for Jiaozhou Bay, while prokaryote abundance measured in the Pearl River Estuary were within the range recorded in several previous studies (Zhou et al, 2011;Yuan et al, 2011;Zhang et al, 2013). Jellett et al (1996) suggested that the percent contribution of HNA cells to the microbial community (%HNA) could be used as an active cell index.…”

Section: Phytoplankton Abundance and Community Compositionsupporting

confidence: 88%

“…It has been indicated that river input may exert a negative effect on Syn distribution Pan et al, 2007;Zhang et al, 2013). In this context, Syn abundance showed an increasing pattern along the salinity gradient in the estuary (Table 1, Fig.…”

Section: Distribution Patterns Of Picophytoplankton Populationsmentioning

confidence: 91%

“…Furthermore, recent work demonstrated that there was a tighter correlation between HNA and larger phytoplankton density (r = 0.58, p < 0.01; Table 1) when compared with the HNA-Syn correlation (r = 0.51, p < 0.05; Table 1). This is a direct indication that the HNA population was more dependent on diatom-mediated DOM, because larger-sized diatoms were always dominant in eutrophic coastal waters (e.g., the Pearl River Estuary and Daya Bay) and pico-sized phytoplankton served as a major contributor to primary production only in open oceans (Zhang et al, 2013).…”

Section: Phytoplankton Abundance and Community Compositionmentioning

confidence: 98%

“…In terms of picoplankton in this estuary, the distribution is becoming increasingly well understood (Qiu et al, 2010;Lin et al, 2010;Zhang et al, 2013). However, few data are available on the abundance and community structure of picoplankton and virioplankton and their connection along the gradient in the Pearl River Estuary.…”

Section: Introductionmentioning

confidence: 99%

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Picoplankton and virioplankton abundance and community structure in Pearl River Estuary and Daya Bay, South China

Huang

Zhang

2015

Journal of Environmental Sciences

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Section: Phytoplankton Abundance and Community Compositionsupporting

confidence: 88%

Section: Distribution Patterns Of Picophytoplankton Populationsmentioning

confidence: 91%

Section: Phytoplankton Abundance and Community Compositionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Picoplankton and virioplankton abundance and community structure in Pearl River Estuary and Daya Bay, South China

Huang

Zhang

2015

Journal of Environmental Sciences

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“…Bacterial abundance in Sidi Salem's reservoir was high, with concentration reaching (5.26 and 3.84 r 10 7 cells.mL x1 ). In our surveys, the Heterotrophic bacteria showed a negative correlation with chlorophyll a, their biomass is a well-known characteristic of the eutrophic system; the same result was obtained by Zhang et al (2013) in the Pearl River Estuary. However, many investigators have observed significant correlations between bacteria and chlorophyll a in various ecosystems, including the Chesapeake Bay (Ducklow et al, 1999), the Mississippi River Plume (Liu et al, 2004), the Danshui Estuary (Tsai et al, 2011), the East China Sea (Pan et al, 2005) and the northern South China Sea (Yuan et al, 2011), indicating that primary production provides most of the carbon needed for heterotrophic bacteria production in these settings.…”

Section: Discussionsupporting

confidence: 72%

Seasonal patterns of viral, microbial and planktonic communities in Sidi Salem: a freshwater reservoir (North of Tunisia)

Romdhane

Bour

Hamza

et al. 2014

Ann. Limnol. - Int. J. Lim.

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-We investigated the distribution and dynamics of viruses, prokaryotes and small eukaryotic phytoplankton in Sidi Salem freshwater reservoir (Northern Tunisia). Samples were collected from the deepest station at different depths throughout the water column for 2 years (February 2009 to January 2011). The reservoir was characterized by seasonal alternations of thermal stratification and homothermy. Among the different microbial communities counted using flow cytometry (FCM), picocyanobacteria constituted an important autotrophic component since they were always present and their highest concentration reached 3.02 and 2.65 r 10 5 cells.mL x1 in March 2009 and June 2010, respectively. The heterotrophic prokaryotic communities (represented mainly by bacteria) were characterized by a clear separation between two subgroups referred to as high-DNA and low-DNA content populations, and the highest concentrations of heterotrophic bacteria (i.e., 3.8 r 10 7 cells.mL x1 ) were recorded in spring 2009. Several viral groups referred to as virus-like particles (VLP) groups 1, 2 and 3 could also be discriminated using FCM. VLP1 and VLP2 displayed a significant correlation with the heterotrophic bacteria (r = 0.80 and 0.78, P < 0.001) but seem to be independent from picocyanobacteria and/or chlorophyll a, suggesting these VLPs were mainly bacteriophages. At last, the virus to prokaryotic ratio could be high, especially in summer (mean = 22, max = 487), suggesting a strong coupling between bacteria and viruses, at least at certain periods of the year.

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Dynamic responses of picophytoplankton to physicochemical variation in the eastern Indian Ocean

Wei

Zhang

et al. 2019

Ecology and Evolution

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Picophytoplankton were investigated during spring 2015 and 2016 extending from near‐shore coastal waters to oligotrophic open waters in the eastern Indian Ocean (EIO). They were typically composed of Prochlorococcus ( Pro ), Synechococcus ( Syn ), and picoeukaryotes ( PEuks ). Pro dominated most regions of the entire EIO and were approximately 1–2 orders of magnitude more abundant than Syn and PEuks . Under the influence of physicochemical conditions induced by annual variations of circulations and water masses, no coherent abundance and horizontal distributions of picophytoplankton were observed between spring 2015 and 2016. Although previous studies reported the limited effects of nutrients and heavy metals around coastal waters or upwelling zones could constrain Pro growth, Pro abundance showed strong positive correlation with nutrients, indicating the increase in nutrient availability particularly in the oligotrophic EIO could appreciably elevate their abundance. The exceptional appearance of picophytoplankton with high abundance along the equator appeared to be associated with the advection processes supported by the Wyrtki jets. For vertical patterns of picophytoplankton, a simple conceptual model was built based upon physicochemical parameters. However, Pro and PEuks simultaneously formed a subsurface maximum, while Syn generally restricted to the upper waters, significantly correlating with the combined effects of temperature, light, and nutrient availability. The average chlorophyll a concentrations (Chl a ) of picophytoplankton accounted for above 49.6% and 44.9% of the total Chl a during both years, respectively, suggesting that picophytoplankton contributed a significant proportion of the phytoplankton community in the whole EIO.

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Spatial and temporal variations of picoplankton in three contrasting periods in the Pearl River Estuary, South China

Cited by 25 publications

References 61 publications

Picoplankton and virioplankton abundance and community structure in Pearl River Estuary and Daya Bay, South China

Picoplankton and virioplankton abundance and community structure in Pearl River Estuary and Daya Bay, South China

Seasonal patterns of viral, microbial and planktonic communities in Sidi Salem: a freshwater reservoir (North of Tunisia)

Dynamic responses of picophytoplankton to physicochemical variation in the eastern Indian Ocean

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