Journal ArticleDOI
Effects of soil phosphorus availability, temperature and moisture on soil respiration in Eucalyptus pauciflora forest
TLDR
In this article, the authors investigated the effect of temperature and moisture on soil CO2 efflux in a mature Eucalyptus pauciflora forest in unfertilized and phosphorus-fertilised plots.Abstract:
Rates of soil respiration (CO2 efflux) were measured for a year in a mature Eucalyptus pauciflora forest in unfertilized and phosphorus-fertilized plots. Soil CO2 efflux showed a distinct seasonal trend, and average daily rates ranged from 124 to 574 mg CO2 m−2 hr−1. Temperature and moisture are the main variables that cause variation in soil CO2 efflux; hence their effects were investigated over a year so as to then differentiate the treatment effect of phosphorus (P) nutrition.read more
Citations
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Will changes in soil organic carbon act as a positive or negative feedback on global warming
TL;DR: In this article, a review of evidence from various sources can be used to assess whether NPP or the rate of decomposition has the greater temperature sensitivity, and hence whether warming is likely to lead to an increase or decrease in soil organic carbon.
Journal ArticleDOI
Soil-surface CO2 efflux and its spatial and temporal variations in a young ponderosa pine plantation in northern California
TL;DR: In this article, the authors examined soil surface CO2 efflux and its spatial and temporal variations in an 8-y-old ponderosa pine plantation in the Sierra Nevada Mountains in California from June 1998 to August 1999.
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Annual variation in soil respiration and its components in a coppice oak forest in Central Italy
Ana Rey,Emiliano Pegoraro,Vanessa Tedeschi,Ilaria De Parri,Paul G. Jarvis,Riccardo Valentini +5 more
TL;DR: In this paper, the authors investigated the annual variation of soil respiration and its components in relation to seasonal changes in soil temperature and soil moisture in a Mediterranean mixed oak forest ecosystem, and set up a series of experimental treatments in May 1999 where litter (no litter), roots (no roots, by trenching) or both were excluded from plots of 4 m2.
Journal ArticleDOI
Linking the global carbon cycle to individual metabolism
TL;DR: The model provides a synthetic, mechanistic framework for linking global biogeochemical cycles to cellular-, individual- and community-level processes and supports the hypothesis that the combined effects of body size and temperature on individual metabolic rate impose important constraints on the global C cycle.
Journal ArticleDOI
Ecosystem respiration in two Mediterranean evergreen Holm Oak forests: drought effects and decomposition dynamics
Markus Reichstein,John Tenhunen,Olivier Roupsard,Jean-Marc Ourcival,Serge Rambal,Sabina Dore,Riccardo Valentini +6 more
TL;DR: The regression model analysis revealed that in drier soil, ecosystem respiration was more sensitive to soil moisture than is expressed by the often used hyperbolic model, and the importance of below-ground processes for ecosystem C balances is emphasized.
References
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Book
Analysis of longitudinal data
TL;DR: In this paper, a generalized linear model for longitudinal data and transition models for categorical data are presented. But the model is not suitable for categric data and time dependent covariates are not considered.
Journal ArticleDOI
On the temperature dependence of soil respiration
Jon Lloyd,John Taylor +1 more
TL;DR: An empirical equation is presented which yields an unbiased estimator of respiration rates over a wide range of temperatures and provides representative estimates of the seasonal cycle of net ecosystem productivity and its effects on atmospheric CO 2.
Journal ArticleDOI
The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate
TL;DR: In this article, measured rates of soil respiration from terrestrial and wetland ecosystems were used to define the annual global CO 2 flux from soils, to identify uncertainties in the global flux estimate, and to investigate the influences of temperature, precipitation, and vegetation.