Open AccessIssues and recent advances in soil respiration
Author(s) -
Hibbard K. A.,
Law B. E.,
Ryan M. G.,
Takle E. S.
Publication year - 2004
Publication title -
eos, transactions american geophysical union
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.316
H-Index - 86
eISSN - 2324-9250
pISSN - 0096-3941
DOI - 10.1029/2004eo220009
Subject(s) - environmental science , carbon cycle , respiration , soil respiration , biomass (ecology) , photosynthesis , soil water , carbon respiration , autotroph , nutrient , soil carbon , carbon fibers , agronomy , soil science , ecology , carbon dioxide , ecosystem , carbon sequestration , botany , biology , genetics , materials science , bacteria , composite number , negative carbon dioxide emission , composite material
The terrestrial carbon cycle is intrinsically tied to climate, hydrology, nutrient cycles, and the production of biomass through photosynthesis. Over two‐thirds of terrestrial carbon is stored below ground in soils, and a significant amount of atmospheric CO 2 is processed by soils every year.Thus, soil respiration is a key process that underlies our understanding of the carbon cycle. Soil CO 2 fluxes are the sum of root (autotrophic) and microbial (heterotrophic) respiration. Several factors contribute to soil respiration, including photosynthetic supply to roots, substrate quality and availability, temperature, and moisture.