@article{fdi:010077491, title = {{S}low rate of secondary forest carbon accumulation in the {G}uianas compared with the rest of the {N}eotropics}, author = {{C}have, {J}. and {P}iponiot, {C}. and {M}ar{\'e}chaux, {I}. and {F}oresta, {H}ubert de and {L}arpin, {D}. and {F}ischer, {F}. {J}. and {D}erroire, {G}. and {V}incent, {G}r{\'e}goire and {H}{\'e}rault, {B}.}, editor = {}, language = {{ENG}}, abstract = {{S}econdary forests are a prominent component of tropical landscapes, and they constitute a major atmospheric carbon sink. {R}ates of carbon accumulation are usually inferred from chronosequence studies, but direct estimates of carbon accumulation based on long-term monitoring of stands are rarely reported. {R}ecent compilations on secondary forest carbon accumulation in the {N}eotropics are heavily biased geographically as they do not include estimates from the {G}uiana {S}hield. {W}e analysed the temporal trajectory of aboveground carbon accumulation and floristic composition at one 25-ha secondary forest site in {F}rench {G}uiana. {T}he site was clear-cut in 1976, abandoned thereafter, and one large plot (6.25 ha) has been monitored continuously since. {W}e used {B}ayesian modeling to assimilate inventory data and simulate the long-term carbon accumulation trajectory. {C}anopy change was monitored using two aerial lidar surveys conducted in 2009 and 2017. {W}e compared the dynamics of this site with that of a surrounding old-growth forest. {F}inally, we compared our results with that from secondary forests in {C}osta {R}ica, which is one of the rare long-term monitoring programs reaching a duration comparable to our study. {T}wenty years after abandonment, aboveground carbon stock was 64.2 (95% credibility interval 46.4, 89.0) {M}g {C}/ha, and this stock increased to 101.3 (78.7, 128.5) {M}g {C}/ha 20 yr later. {T}he time to accumulate one-half of the mean aboveground carbon stored in the nearby old-growth forest (185.6 [155.9, 200.2] {M}g {C}/ha) was estimated at 35.0 [20.9, 55.9] yr. {D}uring the first 40 yr, the contribution of the long-lived pioneer species {X}ylopia nitida, {G}oupia glabra, and {L}aetia procera to the aboveground carbon stock increased continuously. {S}econdary forest mean-canopy height measured by lidar increased by 1.14 m in 8 yr, a canopy-height increase consistent with an aboveground carbon accumulation of 7.1 {M}g {C}/ha (or 0.89 {M}g {C} center dot ha(-1)center dot yr(-1)) during this period. {L}ong-term {AGC} accumulation rate in {C}osta {R}ica was almost twice as fast as at our site in {F}rench {G}uiana. {T}his may reflect higher fertility of {C}entral {A}merican forest communities or a better adaptation of the forest tree community to intense and frequent disturbances. {T}his finding may have important consequences for scaling-up carbon uptake estimates to continental scales.}, keywords = {biomass ; carbon ; forest ; {F}rench {G}uiana ; regeneration ; secondary forests ; tropics ; {GUYANE} {FRANCAISE} ; {ZONE} {TROPICALE}}, booktitle = {}, journal = {{E}cological {A}pplications}, volume = {30}, numero = {1}, pages = {e02004 [13 ]}, ISSN = {1051-0761}, year = {2020}, DOI = {10.1002/eap.2004}, URL = {https://www.documentation.ird.fr/hor/fdi:010077491}, }