Fire, hurricane and carbon dioxide effects on net primary production of a subtropical woodland

Fire, hurricane and carbon dioxide : effects on net primary production of a subtropical woodland

© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 200(2013), 3 vom: 31. Nov., Seite 767-777
1. Verfasser: Hungate, Bruce A (VerfasserIn)
Weitere Verfasser: Day, Frank P, Dijkstra, Paul, Duval, Benjamin D, Hinkle, C Ross, Langley, J Adam, Megonigal, J Patrick, Stiling, Peter, Johnson, Dale W, Drake, Bert G
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, U.S. Gov't, Non-P.H.S. disturbance elevated CO2 fire global environmental change hurricane net primary productivity (NPP) nitrogen cycling oak woodland mehr... Soil Carbon Dioxide 142M471B3J Nitrogen N762921K75
Beschreibung
Zusammenfassung:© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.
Disturbance affects most terrestrial ecosystems and has the potential to shape their responses to chronic environmental change. Scrub-oak vegetation regenerating from fire disturbance in subtropical Florida was exposed to experimentally elevated carbon dioxide (CO₂) concentration (+350 μl l(-1)) using open-top chambers for 11 yr, punctuated by hurricane disturbance in year 8. Here, we report the effects of elevated CO₂ on aboveground and belowground net primary productivity (NPP) and nitrogen (N) cycling during this experiment. The stimulation of NPP and N uptake by elevated CO₂ peaked within 2 yr after disturbance by fire and hurricane, when soil nutrient availability was high. The stimulation subsequently declined and disappeared, coincident with low soil nutrient availability and with a CO₂ -induced reduction in the N concentration of oak stems. These findings show that strong growth responses to elevated CO₂ can be transient, are consistent with a progressively limited response to elevated CO₂ interrupted by disturbance, and illustrate the importance of biogeochemical responses to extreme events in modulating ecosystem responses to global environmental change
Beschreibung:Date Completed 29.04.2014
Date Revised 20.04.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.12409