Pierre Taillardat


PhD student
Surface and subsurface biogeochemical dynamics in Can Gio Biosphere Reserve, Vietnam

My research describes the key biogeochemical roles mangroves play as a carbon sink and nutrient source. This research is quantifying the dynamics of carbon (C) nitrogen (N), and phosphorus (P) in a tropical mangrove tidal creek located in South Vietnam (Can Gio UNESCO Biosphere Reserve). The study employs a multi-isotope approach (d13CPOC, d15NPON, d13CDIC, d13CDOC, d15NNO3 & 18ONO3) to identify the origins and movement of organic matter and dissolved elemental constituents in the mangrove surface and subsurface environment (including the water column, pore water, sediment). 24 hours time series sampling during the both dry and wet seasons, as well as during neap and spring tide cycles, will provide data to quantify element fluxes and understand complex elemental cycling.

Evaluating the fluxes of carbon and nutrients released into the marine environment is important for understanding the role of mangroves in linking the atmospheric, terrestrial and marine element cycles. Cementing the globally significant role that mangroves play in the carbon cycle will generate strong evidence for developing better coastal management plans and carbon investment projects. This research iis in collaboration with Institut de Recherche pour le Développement (IRD, France/Vietnam) and Université du Québec à Montréal (GEOTOP - UQAM, Canada).

I graduated in Earth Sciences from Université François Rabelais, then moved to Canada for my MSc in Environmental Sciences at UQAM.  I first studied the impact of deforestation on the mercury cycle in Brazilian Amazonia. Then, my MSc research was about carbon fluxes in a mangrove forest at Xuan Thuy National Park, Vietnam.