Drought stress and tree size determine stem CO2 efflux in a tropical forest

- CO₂ efflux from stems (CO₂_stem) accounts for a substantial fraction of tropical forest gross primary productivity, but the climate sensitivity of this flux remains poorly understood. - We present a study of tropical forest CO₂_stem from 215 trees across wet and dry seasons, at the world's lo...

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Detalles Bibliográficos
Autores: Rowland, Lucy|||0000-0002-0774-3216, da Costa, Antonio C. L., Oliveira, Alex A. R., Oliveira, Rafael S.|||0000-0002-6392-2526, Bittencourt, Paulo L.|||0000-0003-0883-4870, Costa, Patricia B., Giles, Andre L.|||0000-0002-1973-400X, Sosa, Azul I., Coughlin, Ingrid, Godlee, John L., Vasconcelos, Steel S., Junior, João A. S., Ferreira, Leandro V., Mencuccini, Maurizio|||0000-0003-0840-1477, Meir, Patrick|||0000-0002-2362-0398
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:195160
Acceso en línea:https://ddd.uab.cat/record/195160
https://dx.doi.org/urn:doi:10.1111/nph.15024
Access Level:acceso abierto
Palabra clave:Drought
Growth respiration
Maintenance respiration
Stem CO2 efflux
Tropical rainforests
Woody tissue respiration
Descripción
Sumario:- CO₂ efflux from stems (CO₂_stem) accounts for a substantial fraction of tropical forest gross primary productivity, but the climate sensitivity of this flux remains poorly understood. - We present a study of tropical forest CO₂_stem from 215 trees across wet and dry seasons, at the world's longest running tropical forest drought experiment site. - We show a 27% increase in wet season CO₂_stem in the droughted forest relative to a control forest. This was driven by increasing CO₂_stem in trees 10-40 cm diameter. Furthermore, we show that drought increases the proportion of maintenance to growth respiration in trees.

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