@article {5984,
	title = {Short-term changes in the quality of suspended particulate matter in a human impacted and mangrove dominated tropical estuary (Can Gio, Vietnam)},
	journal = {Continental Shelf Research },
	volume = {178},
	year = {2019},
	month = {01/05/2019},
	pages = {59-67},
	abstract = {<p>Suspended particulate matter (SPM) is a key component of coastal food webs and a key variable of nutrient budgets. Understanding its variability across short time scales in estuaries may help ecologists understand seasonal and diurnal migration of estuarine organisms, and answer how their nutritional requirements are fulfilled. It may also inform biogeochemists regarding the factors that influence import and export of nutrients between terrestrial and coastal ecosystems. This study aimed to link the dynamics of fatty acids, stable isotopes (δ13C and δ15N) and C/N ratios of SPM, revealing organic matter quality, to rapidly varying factors (SPM concentration, salinity and presence of daylight) and comparing this variability to the seasonal variation induced by the alternation of dry and wet seasons in the studied region. Our results revealed that these rapidly varying factors had a strong influence on the bacterial and the phytoplanktonic compartments of SPM. They suggest that tidally resuspended particles are the site of intense heterotrophic activity and that estuarine phytoplankton store lipids during the daytime up to substantially modifying SPM quality. Our study also shows higher freshness of SPM during the wet season. We expect this study to raise the interest of both biologists and biogeochemists to introduce daily variability of SPM in food webs and nutrient budgets modelling.</p>
},
	doi = {10.1016/j.csr.2019.03.011},
	author = {Frank David and Cyril Marchand and Najet Thiney and Tran-thi, N and Tarik Meziane}
}
@article {5465,
	title = {Carbon biogeochemistry and CO2 emissions in a human impacted and mangrove dominated tropical estuary (Can Gio, Vietnam)},
	journal = {Biogeochemistry},
	year = {2018},
	month = {27/04/2018},
	pages = {1-15},
	abstract = {<p class="rtejustify">The quantitative contribution of tropical estuaries to the atmospheric CO2\&nbsp;budget has large uncertainties, both spatially and seasonally. We investigated the seasonal and spatial variations of carbon biogeochemistry downstream of Ho Chi Minh City (Southern Vietnam). We sampled four sites distributed from downstream of a highly urbanised watershed through mangroves to the South China Sea coast during the dry and wet seasons. Measured partial pressure of CO2(pCO2) ranged from 660 to 3000\&nbsp;μatm during the dry season, and from 740 to 5000\&nbsp;μatm during the wet season. High organic load, dissolved oxygen saturation down to 17\%, and pCO2up to 5000\&nbsp;μatm at the freshwater endmember of the estuary reflected the intense human pressure on this ecosystem. We show that releases from mangrove soils affect the water column pCO2\&nbsp;in this large tropical estuary (~600\&nbsp;m wide and 10{\textendash}20\&nbsp;m deep). This study is among the few to report direct measurements of both water pCO2\&nbsp;and CO2\&nbsp;emissions in a Southeast Asian tropical estuary located in a highly urbanised watershed. It shows that the contribution of such estuaries may have been previously underestimated, with CO2\&nbsp;emissions ranging from 74 to 876\&nbsp;mmol\&nbsp;m-2\&nbsp;day-1\&nbsp;at low current velocity (\&lt;\&nbsp;0.2\&nbsp;m\&nbsp;s-1). Corresponding gas transfer velocities k600,\&nbsp;ranging from 1.7 to 11.0\&nbsp;m\&nbsp;day-1,\&nbsp;were about 2 to 4 times of k600\&nbsp;estimated using published literature equations.</p>
},
	doi = {https://doi.org/10.1007/s10533-018-0444-z},
	author = {Frank David and Tarik Meziane and Tran-thi, N and Truong Van, V and Th{\`a}nh-Nho, N and Pierre Taillardat and Cyril Marchand}
}
