Assessing above-ground woody debris dynamics along a gradient of elevation in Amazonian cloud forests in Peru: balancing above-ground inputs and respiration outputs
(2014) In Plant Ecology & Diversity 7(1-2). p.143-160- Abstract
- Background: Dead biomass, including woody debris (WD), is an important component of the carbon cycle in tropical forests. Aims: This study analyses WD (>2 cm) and other above-ground fluxes in mature tropical forest plots along an elevational gradient (210-3025 m above sea level) in southern Peru. Methods: This work was based on inventories of fine and coarse WD (FWD and CWD, respectively), above-ground biomass, and field-based and experimental respiration measurements. Results: Total WD stocks ranged from 6.26 Mg C ha(-1) at 3025 m to 11.48 Mg C ha(-1) at 2720 m. WD respiration was significantly correlated with moisture content (P < 0.001; R-2 = 0.25), temperature (P < 0.001; R-2 = 0.12) and wood density (P < 0.001; R-2 =... (More)
- Background: Dead biomass, including woody debris (WD), is an important component of the carbon cycle in tropical forests. Aims: This study analyses WD (>2 cm) and other above-ground fluxes in mature tropical forest plots along an elevational gradient (210-3025 m above sea level) in southern Peru. Methods: This work was based on inventories of fine and coarse WD (FWD and CWD, respectively), above-ground biomass, and field-based and experimental respiration measurements. Results: Total WD stocks ranged from 6.26 Mg C ha(-1) at 3025 m to 11.48 Mg C ha(-1) at 2720 m. WD respiration was significantly correlated with moisture content (P < 0.001; R-2 = 0.25), temperature (P < 0.001; R-2 = 0.12) and wood density (P < 0.001; R-2 = 0.16). Controlled experiments showed that both water content and temperature increased respiration rates of individual WD samples. The full breadth of the temperature sensitivity coefficient, or Q(10), estimates, ranging from 1.14-2.13, was low compared to other studies. In addition, temperature sensitivity of WD respiration was greater for higher elevations. Conclusions: Carbon stocks, mortality and turnover of above-ground biomass varied widely and were not significantly related with elevation or slope. This study demonstrates that some forests may be a carbon source due to legacies of disturbance and increasing temperatures, which may cause additional, short-term carbon efflux from WD. Predictions of tropical forest carbon cycles under future climate should incorporate WD dynamics and related feedback. (Less)
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https://lup.lub.lu.se/record/4643841
- author
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Amazon Basin, Andes, carbon balance, cloud forest, montane forest, necromass, respiration, temperature sensitivity, tropical forest, turnover
- in
- Plant Ecology & Diversity
- volume
- 7
- issue
- 1-2
- pages
- 143 - 160
- publisher
- Taylor & Francis
- external identifiers
-
- wos:000336082900010
- scopus:84893215827
- ISSN
- 1755-0874
- DOI
- 10.1080/17550874.2013.818073
- language
- English
- LU publication?
- no
- id
- 541941f2-c2fb-4c36-8778-3a81e80b5a7b (old id 4643841)
- date added to LUP
- 2016-04-01 09:57:01
- date last changed
- 2022-04-27 17:06:43
@article{541941f2-c2fb-4c36-8778-3a81e80b5a7b,
abstract = {{Background: Dead biomass, including woody debris (WD), is an important component of the carbon cycle in tropical forests. Aims: This study analyses WD (>2 cm) and other above-ground fluxes in mature tropical forest plots along an elevational gradient (210-3025 m above sea level) in southern Peru. Methods: This work was based on inventories of fine and coarse WD (FWD and CWD, respectively), above-ground biomass, and field-based and experimental respiration measurements. Results: Total WD stocks ranged from 6.26 Mg C ha(-1) at 3025 m to 11.48 Mg C ha(-1) at 2720 m. WD respiration was significantly correlated with moisture content (P < 0.001; R-2 = 0.25), temperature (P < 0.001; R-2 = 0.12) and wood density (P < 0.001; R-2 = 0.16). Controlled experiments showed that both water content and temperature increased respiration rates of individual WD samples. The full breadth of the temperature sensitivity coefficient, or Q(10), estimates, ranging from 1.14-2.13, was low compared to other studies. In addition, temperature sensitivity of WD respiration was greater for higher elevations. Conclusions: Carbon stocks, mortality and turnover of above-ground biomass varied widely and were not significantly related with elevation or slope. This study demonstrates that some forests may be a carbon source due to legacies of disturbance and increasing temperatures, which may cause additional, short-term carbon efflux from WD. Predictions of tropical forest carbon cycles under future climate should incorporate WD dynamics and related feedback.}},
author = {{Gurdak, Daniel J. and Aragao, Luiz E. O. C. and Rozas-Davila, Angela and Huasco, Walter H. and Cabrera, Karina G. and Doughty, Chris E. and Farfan-Rios, William and Silva-Espejo, Javier E. and Metcalfe, Dan and Silman, Miles R. and Malhi, Yadvinder}},
issn = {{1755-0874}},
keywords = {{Amazon Basin; Andes; carbon balance; cloud forest; montane forest; necromass; respiration; temperature sensitivity; tropical forest; turnover}},
language = {{eng}},
number = {{1-2}},
pages = {{143--160}},
publisher = {{Taylor & Francis}},
series = {{Plant Ecology & Diversity}},
title = {{Assessing above-ground woody debris dynamics along a gradient of elevation in Amazonian cloud forests in Peru: balancing above-ground inputs and respiration outputs}},
url = {{http://dx.doi.org/10.1080/17550874.2013.818073}},
doi = {{10.1080/17550874.2013.818073}},
volume = {{7}},
year = {{2014}},
}