Phytoplankton distribution and productivity in a highly turbid, tropical coastal system (Bach Dang Estuary, Vietnam).

Abstract:

:Phytoplankton diversity, primary and bacterial production, nutrients and metallic contaminants were measured during the wet season (July) and dry season (March) in the Bach Dang Estuary, a sub-estuary of the Red River system, Northern Vietnam. Using canonical correspondence analysis we show that phytoplankton community structure is potentially influenced by both organometallic species (Hg and Sn) and inorganic metal (Hg) concentrations. During March, dissolved methylmercury and inorganic mercury were important factors for determining phytoplankton community composition at most of the stations. In contrast, during July, low salinity phytoplankton community composition was associated with particulate methylmercury concentrations, whereas phytoplankton community composition in the higher salinity stations was more related to dissolved inorganic mercury and dissolved mono and tributyltin concentrations. These results highlight the importance of taking into account factors other than light and nutrients, such as eco-toxic heavy metals, in understanding phytoplankton diversity and activity in estuarine ecosystems.

journal_name

Mar Pollut Bull

authors

Rochelle-Newall EJ,Chu VT,Pringault O,Amouroux D,Arfi R,Bettarel Y,Bouvier T,Bouvier C,Got P,Nguyen TM,Mari X,Navarro P,Duong TN,Cao TT,Pham TT,Ouillon S,Torréton JP

doi

10.1016/j.marpolbul.2011.08.044

subject

Has Abstract

pub_date

2011-11-01 00:00:00

pages

2317-29

issue

11

eissn

0025-326X

issn

1879-3363

pii

S0025-326X(11)00468-1

journal_volume

62

pub_type

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