@article{fdi:010070064, title = {{C}hanges in soil characteristics and {C} dynamics after mangrove clearing ({V}ietnam)}, author = {{G}rellier, {S}. and {J}aneau, {J}ean-{L}ouis and {N}hon, {D}. {H}. and {C}uc, {N}. {T}. {K}. and {Q}uynh, {L}. {T}. {P}. and {T}hao, {P}. {T}. {T}. and {N}hu-{T}rang, {T}. {T}. and {M}archand, {C}yril}, editor = {}, language = {{ENG}}, abstract = {{O}f the blue carbon sinks, mangroves have one of the highest organic matter ({OM}) storage capacities in their soil due to low mineralization processes resulting from waterlogging. {H}owever, mangroves are disappearing worldwide because of demographic increases. {I}n addition to the loss of {CO}2 fixation, mangrove clearing can strongly affect soil characteristics and {C} storage. {T}he objectives of the present study were to quantify the evolution of soil quality, carbon stocks and carbon fluxes after mangrove clearing. {S}ediment cores to assess physico-chemical properties were collected and in situ {CO}2 fluxes were measured at the soil-air interface in a mangrove of {N}orthern {V}ietnam. {W}e compared a {K}andelia candel mangrove forest with a nearby zone that had been cleared two years before the study. {S}ignificant decrease of clay content and an increase in bulk density for the upper 35 cm in the cleared zone were observed. {S}oil organic carbon ({OC}) content in the upper 35 cm decreased by >65% two years after clearing. {T}he quantity and the quality of the carbon changed, with lower carbon to nitrogen ratios, indicating a more decomposed {OM}, a higher content of dissolved organic carbon, and a higher content of inorganic carbon (three times higher). {T}his highlights the efficiency of mineralization processes following clearing. {D}ue to the rapid decrease in the soil carbon content, {CO}2 fluxes at sediment interface were >50% lower in the cleared zone. {T}aking into account carbonate precipitation after {OC} mineralization, the mangrove soil lost similar to 10 {M}g{OC} ha(-1)yr(-1) mostly as {CO}2 to the atmosphere and possibly as dissolved forms towards adjacent ecosystems. {T}he impacts on the carbon cycle of mangrove clearing as shown by the switch from a {C} sink to a {C} source highlight the importance of maintaining these ecosystems, particularly in a context of climate change.}, keywords = {{S}ediment properties ; {C}arbon stocks ; {S}oil {CO}2 fluxes ; {VIET} {NAM}}, booktitle = {}, journal = {{S}cience of the {T}otal {E}nvironment}, volume = {593}, numero = {}, pages = {654--663}, ISSN = {0048-9697}, year = {2017}, DOI = {10.1016/j.scitotenv2017.03.204}, URL = {https://www.documentation.ird.fr/hor/fdi:010070064}, }