Investigating factors driving phytoplankton growth and grazing loss rates in waters around Peninsular Malaysia

Lim, Joon Hai; Lee, Choon Weng; Bong, Chui Wei

doi:10.1007/s00343-020-9227-1

Cited by 3 publications

(4 citation statements)

References 48 publications

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“…2), our results confirm that dissolved biogeochemical properties in the Singapore Strait are largely controlled by the regional advection of distinct water masses according to the monsoon-driven changes in ocean currents, as previously described for DOC and for CDOM (Martin et al, 2021;Zhou et al, 2021). Our data also provide further support for classifying the Singapore Strait as a mesotrophic environment (Lim et al, 2021) despite the seasonally low concentrations of inorganic nutrients.…”

Section: Tablesupporting

confidence: 89%

“…3): very low values (<0.5 μmol l − 1 DIN) are seen especially during the late NE monsoon and intermonsoon 1, which are similar to reports from the open Sunda Shelf and the South China Sea (Kartadikaria et al, 2015;Liu et al, 2020;Ning et al, 2004). In contrast, nutrient concentrations during the SW monsoon are significantly elevated, and similar to values reported from the Malacca Strait (Lim et al, 2015(Lim et al, , 2021. However, chlorophyll-a concentrations were above 0.4 μg l − 1 in all but two samples, and averaged about 1 μg l − 1 (Fig.…”

Section: Seasonality and Range In Dissolved Nutrient Concentrationssupporting

confidence: 85%

“…4). Grazing, especially by microzooplankton, is probably also a key factor controlling phytoplankton biomass, as noted at other tropical coastal sites (Burford et al, 2008;Furnas et al, 2005;Lim et al, 2021).…”

Section: Composition and Dynamics Of Particulate Organic Mattermentioning

confidence: 75%

“…Across the open waters of the Sunda Shelf, chlorophyll-a concentrations are typically ≤0.2 μg l − 1 (Kartadikaria et al, 2015;Ke et al, 2014), indicative of oligotrophic waters. Closer to shore and within estuaries, significant levels of eutrophication due to nutrient input have been reported, with chlorophyll-a of 5-50 μg l − 1 at some sites (Chai et al, 2021;Damar et al, 2019;Lim et al, 2018Lim et al, , 2021Tomascik et al, 1994). However, very few studies have collected multi-year biogeochemical time series in Southeast Asia (Lim et al, 2015(Lim et al, , 2018.…”

Section: Introductionmentioning

confidence: 99%

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Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: time-series observations in the Singapore Strait

Martin

Moynihan

Chen

et al. 2021

Preprint

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Section: Tablesupporting

confidence: 89%

Section: Seasonality and Range In Dissolved Nutrient Concentrationssupporting

confidence: 85%

Section: Composition and Dynamics Of Particulate Organic Mattermentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: time-series observations in the Singapore Strait

Martin

Moynihan

Chen

et al. 2021

Preprint

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Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: Time-series observations in the Singapore Strait

Martin

Moynihan

Chen

et al. 2022

Estuarine, Coastal and Shelf Science

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Viral dynamics in tropical coastal waters: effects of warming and nutrient enrichment

et al. 2023

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Context We studied the virus component in the microbial food-web in the tropical coastal Sunda Shelf waters. Aims We investigated viral processes, including the lysogenic to lytic shift dynamics with seawater warming and nutrient enrichment. Methods We sampled nearshore and offshore waters of Peninsular Malaysia to provide a natural trophic gradient for correlational analyses. We also conducted laboratory experiments to investigate the changes in virus production rates and lysogeny, when temperature (range: 25–37°C) and nutrient concentrations (range: 0.1–1.0× marine-broth concentration) were manipulated. Key results Observations showed site-dependent differences in dissolved inorganic nutrient concentration, Chl-a (0.21–3.54 μg L−1) and bacterial abundance (4.09 × 105−9.41 × 105 cells mL−1), but not in viral abundance (measured as virus-like particles or VLP) (1.04 × 106−2.39 × 106 VLP mL−1) and virus production rates (0.59 × 105−4.55 × 105 VLP mL−1 h−1). From laboratory experiments, both warming and nutrient enrichment increased virus production (R2 > 0.651), decreased lysogeny (R2 > 0.743), and resulted in an increase of the viral lysis:bacterial production ratio, and a stronger viral control on bacterial production. Conclusions Although both seawater warming and nutrient enrichment increased virus production and reduced lysogeny, nutrient enrichment was a more important factor. Implications The increasing nutrient concentrations in these waters will increase virus production and virus top-down control of bacteria, and drive the ecosystem towards heterotrophy.

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Investigating factors driving phytoplankton growth and grazing loss rates in waters around Peninsular Malaysia

Cited by 3 publications

References 48 publications

Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: time-series observations in the Singapore Strait

Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: time-series observations in the Singapore Strait

Monsoon-driven biogeochemical dynamics in an equatorial shelf sea: Time-series observations in the Singapore Strait

Viral dynamics in tropical coastal waters: effects of warming and nutrient enrichment

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