Aboveground Autotrophic Respiration

2003 ◽  
pp. 48-66 ◽  
Author(s):  
Nelson T. Edwards ◽  
Paul J. Hanson
Keyword(s):  
Autotrophic Respiration

Thawing permafrost increases old soil and autotrophic respiration in tundra: Partitioning ecosystem respiration using δ13C and ∆14C

2012 ◽  
Vol 19 (2) ◽  
pp. 649-661 ◽  
Author(s):  
Caitlin E. Hicks Pries ◽  
Edward A. G. Schuur ◽  
Kathryn G. Crummer
Keyword(s):  
Ecosystem Respiration ◽  
Autotrophic Respiration ◽  
Thawing Permafrost

Global patterns of soil autotrophic respiration and its relation to climate, soil and vegetation characteristics

Geoderma ◽  
2020 ◽  
Vol 369 ◽  
pp. 114339
Author(s):  
Xiaolu Tang ◽  
Xiangjun Pei ◽  
Ningfei Lei ◽  
Xinrui Luo ◽  
Liang Liu ◽  
...  
Keyword(s):  
Autotrophic Respiration ◽  
Global Patterns ◽  
Vegetation Characteristics

scholarly journals Effects of rising temperatures and [CO 2 ] on the physiology of tropical forest trees

2008 ◽  
Vol 363 (1498) ◽  
pp. 1811-1817 ◽  
Author(s):  
Jon Lloyd ◽  
Graham D Farquhar
Keyword(s):  
Tropical Forests ◽  
Direct Evidence ◽  
Climate Model ◽  
Direct Effects ◽  
Optimum Temperature ◽  
Autotrophic Respiration ◽  
Respiration Rates ◽  
Photosynthetic Productivity ◽  
Leaf Level ◽  
Stimulation Of

Using a mixture of observations and climate model outputs and a simple parametrization of leaf-level photosynthesis incorporating known temperature sensitivities, we find no evidence for tropical forests currently existing ‘dangerously close’ to their optimum temperature range. Our model suggests that although reductions in photosynthetic rate at leaf temperatures ( T L ) above 30°C may occur, these are almost entirely accountable for in terms of reductions in stomatal conductance in response to higher leaf-to-air vapour pressure deficits D . This is as opposed to direct effects of T L on photosynthetic metabolism. We also find that increases in photosynthetic rates associated with increases in ambient [CO 2 ] over forthcoming decades should more than offset any decline in photosynthetic productivity due to higher D or T L or increased autotrophic respiration rates as a consequence of higher tissue temperatures. We also find little direct evidence that tropical forests should not be able to respond to increases in [CO 2 ] and argue that the magnitude and pattern of increases in forest dynamics across Amazonia observed over the last few decades are consistent with a [CO 2 ]-induced stimulation of tree growth.

Estimating autotrophic respiration in streams using daily metabolism data

2013 ◽  
Vol 32 (2) ◽  
pp. 507-516 ◽  
Author(s):  
Robert O. Hall ◽  
Jake J. Beaulieu
Keyword(s):  
Autotrophic Respiration

Contrasting responses of heterotrophic and autotrophic respiration to experimental warming in a winter annual-dominated prairie

2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
Dejun Li ◽  
Xuhui Zhou ◽  
Liyou Wu ◽  
Jizhong Zhou ◽  
Yiqi Luo
Keyword(s):  
Experimental Warming ◽  
Autotrophic Respiration ◽  
Winter Annual

Phosphorus addition increased carbon partitioning to autotrophic respiration but not to biomass production in an experiment with Zea mays

2020 ◽  
Vol 43 (9) ◽  
pp. 2054-2065
Author(s):  
Arne Ven ◽  
Melanie S. Verlinden ◽  
Erik Fransen ◽  
Pål Axel Olsson ◽  
Erik Verbruggen ◽  
...  
Keyword(s):  
Zea Mays ◽  
Biomass Production ◽  
Carbon Partitioning ◽  
Autotrophic Respiration ◽  
Phosphorus Addition

Spatial variability of carbon allocation to soil autotrophic respiration in global forest ecosystems

2021 ◽  
Author(s):  
Xiaolu Tang ◽  
Yuehong Shi ◽  
Xinrui Luo ◽  
Liang Liu ◽  
Jinshi Jian ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Carbon Cycling ◽  
Forest Ecosystems ◽  
Environmental Changes ◽  
Carbon Allocation ◽  
Forest Carbon ◽  
Autotrophic Respiration ◽  
Biogeochemical Models ◽  
Temporal And Spatial ◽  
Spatio Temporal

<p>Belowground or ‘soil’ autotrophic respiration (RAsoil) depends on carbohydrates from photosynthesis flowing to roots and rhizospheres, and is one of the most important but uncertain components in forest carbon cycling. Carbon allocation plays an important role in forest carbon cycling and reflects forest adaptation to changing environmental conditions. However, carbon allocation to RAsoil is rarely measured directly and has not been fully examined at the global scale. To fill this knowledge gap, the spatio-temporal patterns of RAsoil with a spatial resolution of half degree from 1981 to 2017 were predicted by Random Forest (RF) algorithm using the most updated Global Soil Respiration Database (v5) with global environmental variables; carbon allocation from photosynthesis to RAsoil (CAsoil), was calculated as the ratio of RAsoil to gross primary production (GPP); and its temporal and spatial patterns were assessed in global forest ecosystems. We found strong temporal and spatial variabilities of RAsoil with an increasing trend from boreal forests to tropical forests. Globally, mean RAsoil from forests was 8.9 ± 0.08 Pg C yr<sup>-1</sup> (mean ± standard deviation) from 1981 to 2017 increasing at a rate of 0.0059 Pg C yr<sup>-2</sup>, paralleling broader soil respiration changes and indicating an increasing carbon loss respired by roots. Mean CAsoil was 0.243 ± 0.016 and showed a decreasing trend over time, although there were interannual variabilities, indicating that CAsoil was sensitive to environmental changes. The temporal trend of CAsoil varied greatly in space, reflecting uneven responses of CAsoil to environmental changes. The spatio-temporal variability of carbon allocation should be considered in global biogeochemical models to accurately predict belowground carbon cycling in an era of ongoing climate change. </p>

Sign in / Sign up

Export Citation Format

Share Document