Extreme late-summer drought causes neutral annual carbon balance in southwestern ponderosa pine forests and grasslands
Bibliographic Data
| ID | 15547802 |
|---|---|
| Authors | Thomas E Kolb (0000-0002-3829-4265, Northern Arizona University, corresponding author), Sabina Dore (0000-0003-2956-5251, University of California, Berkeley), M Montes‐Helu (Northern New Mexico College), Mario Montes-Helu |
| Year | 2013 |
| Volume | 8 |
| Issue | 1 |
| Pages | 015015-015015 |
| Publication date | 2013-02-12 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/8/1/015015 |
| OpenAlex | W2134278153 |
| Language | EN |
| Citations received | 2 |
| References cited | 44 |
We assessed the impacts of extreme late-summer drought on carbon balance in a semi-arid forest region in Arizona. To understand drought impacts over extremes of forest cover, we measured net ecosystem production (NEP), gross primary production (GPP), and total ecosystem respiration (TER) with eddy covariance over five years (2006–10) at an undisturbed ponderosa pine ( Pinus ponderosa ) forest and at a former forest converted to grassland by intense burning. Drought shifted annual NEP from a weak source of carbon to the atmosphere to a neutral carbon balance at the burned site and from a carbon sink to neutral at the undisturbed site. Carbon fluxes were particularly sensitive to drought in August. Drought shifted August NEP at the undisturbed site from sink to source because the reduction of GPP (70%) exceeded the reduction of TER (35%). At the burned site drought shifted August NEP from weak source to neutral because the reduction of TER (40%) exceeded the reduction of GPP (20%). These results show that the lack of forest recovery after burning and the exposure of undisturbed forests to late-summer drought reduce carbon sink strength and illustrate the high vulnerability of forest carbon sink strength in the southwest US to predicted increases in intense burning and precipitation variability
Atmospheric sciences · Carbon cycle · Carbon dioxide · Carbon sequestration · Carbon sink · Ecosystem · Ecosystem respiration · Eddy covariance · Geography · Grassland · Primary production · Sink (geography · Soil respiration · Soil water · Climate variability and models · Environmental Science · Fire effects on ecosystems · Plant Water Relations and Carbon Dynamics · Ecology · Geology · Soil Science
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| Unique citing works | 2 |
|---|---|
| Citations per year | 0,14 |
| Citation span | 2012 - 2015 (4) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 2 |