Smith M.N., Stark S.C., Taylor T.C., Schietti J., de Almeida D.R.A., Aragón S., Torralvo K., Lima A.P., de Oliveira G., de Assis R.L., Leitold V., Pontes-Lopes A., Scoles R., de Sousa Vieira L.C., Resende A.F., Coppola A.I., Brandão D.O., de Athaydes Silva Junior J., Lobato L.F., Freitas W., Almeida D., Souza M.S., Minor D.M., Villegas J.C., Law D.J., Gonçalves N., da Rocha D.G., Guedes M.C., Tonini H., da Silva K.E., van Haren J., Rosa D.M., do Valle D.F., Cordeiro C.L., de Lima N.Z., Shao G., Oliveras Menor Imma, Conti G., Florentino A.P., Montti L., Aragão L.E., McMahon S.M., Parker G.G., Breshears D.D., da Costa A.C.L., Magnusson W.E., Mesquita R., Camargo J.L.C., de Oliveira R.C., de Camargo P.B., Saleska S.R., Walker Nelson B. (2023). Diverse anthropogenic disturbances shift Amazon forests along a structural spectrum. Frontiers in Ecology and the Environment, 21 (1), 24-32. ISSN 1540-9295.
Titre du document
Diverse anthropogenic disturbances shift Amazon forests along a structural spectrum
Année de publication
2023
Auteurs
Smith M.N., Stark S.C., Taylor T.C., Schietti J., de Almeida D.R.A., Aragón S., Torralvo K., Lima A.P., de Oliveira G., de Assis R.L., Leitold V., Pontes-Lopes A., Scoles R., de Sousa Vieira L.C., Resende A.F., Coppola A.I., Brandão D.O., de Athaydes Silva Junior J., Lobato L.F., Freitas W., Almeida D., Souza M.S., Minor D.M., Villegas J.C., Law D.J., Gonçalves N., da Rocha D.G., Guedes M.C., Tonini H., da Silva K.E., van Haren J., Rosa D.M., do Valle D.F., Cordeiro C.L., de Lima N.Z., Shao G., Oliveras Menor Imma, Conti G., Florentino A.P., Montti L., Aragão L.E., McMahon S.M., Parker G.G., Breshears D.D., da Costa A.C.L., Magnusson W.E., Mesquita R., Camargo J.L.C., de Oliveira R.C., de Camargo P.B., Saleska S.R., Walker Nelson B.
Source
Frontiers in Ecology and the Environment, 2023,
21 (1), 24-32 ISSN 1540-9295
Amazon forests are being degraded by myriad anthropogenic disturbances, altering ecosystem and climate function. We analyzed the effects of a range of land-use and climate-change disturbances on fine-scale canopy structure using a large database of profiling canopy lidar collected from disturbed and mature Amazon forest plots. At most of the disturbed sites, surveys were conducted 10-30 years after disturbance,
with many exhibiting signs of recovery. Structural impacts differed in magnitude more than in character among disturbance types, producing a gradient of impacts. Structural changes were highly coordinated in a manner consistent across disturbance types, indicating commonalities in regeneration pathways. At the most severely affected site - burned igapó (seasonally flooded forest) - no signs of canopy regeneration
were observed, indicating a sustained alteration of microclimates and consequently greater vulnerability to transitioning to a more open-canopy, savanna-like state. Notably, disturbances rarely shifted forests beyond the natural background of structural variation within mature plots, highlighting the similarities between anthropogenic and natural disturbance regimes, and indicating a degree of resilience among Amazon
forests. Studying diverse disturbance types within an integrated analytical framework builds capacity to predict the risk of degradation-driven forest transitions.
Plan de classement
Environnement, écologie générale [021ENVECO]
;
Végétation [082VEGET]
;
Végétation / Forêt [126TELAPP08]
Localisation
Fonds IRD [F B010092535]
Identifiant IRD
fdi:010092535
