Grazing increases below-ground biomass and net primary production in a temperate grassland. López-Mársico, L., Altesor, A., Oyarzabal, M., Baldassini, P., & Paruelo, J., M. Plant and Soil, 392(1-2):155-162, Springer International Publishing, 2015.
Website abstract bibtex Background and aims
Grazing can affect the stock and flow of C between above and below-ground vegetation layers. Components of below-ground stratum are one of the less studied. The goals of this research were: 1) to characterize and estimate the vertical distribution of below-ground biomass in grazed and ungrazed areas during a growing season, and 2) to evaluate grazing effects on below-ground net primary production (BNPP).
Methods
Below-ground biomass was cored four times to 100 cm depth during a growing season on three paired grazed-ungrazed areas in South-central Uruguayan grasslands. BNPP was estimated using both field data and CENTURY model.
Results
On average, below-ground biomass was higher in grazed (1417 gm−2) than in ungrazed areas (945 gm−2) and showed a marked reduction in relation with soil depth. Turnover rates were 0.40 and 0.37 years−1 in grazed and ungrazed areas respectively. Field data and CENTURY simulation showed higher BNPP in grazed areas (1.86; 0.77 gm−2days−1 respectively) than in ungrazed areas (1.07; 0.67 gm−2days−1 respectively).
Conclusions
Grazed areas showed higher below-ground biomass, BNPP and turnover that ungrazed areas. Grazing has an important role in regulating both stock and dynamics of C in grassland ecosystems.
Keywords
@article{
title = {Grazing increases below-ground biomass and net primary production in a temperate grassland},
type = {article},
year = {2015},
identifiers = {[object Object]},
keywords = {crn3095},
pages = {155-162},
volume = {392},
websites = {http://dx.doi.org/10.1007/s11104-015-2452-2,citeulike-article-id:14167744},
publisher = {Springer International Publishing},
editors = {[object Object]},
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abstract = {Background and aims
Grazing can affect the stock and flow of C between above and below-ground vegetation layers. Components of below-ground stratum are one of the less studied. The goals of this research were: 1) to characterize and estimate the vertical distribution of below-ground biomass in grazed and ungrazed areas during a growing season, and 2) to evaluate grazing effects on below-ground net primary production (BNPP).
Methods
Below-ground biomass was cored four times to 100 cm depth during a growing season on three paired grazed-ungrazed areas in South-central Uruguayan grasslands. BNPP was estimated using both field data and CENTURY model.
Results
On average, below-ground biomass was higher in grazed (1417 gm−2) than in ungrazed areas (945 gm−2) and showed a marked reduction in relation with soil depth. Turnover rates were 0.40 and 0.37 years−1 in grazed and ungrazed areas respectively. Field data and CENTURY simulation showed higher BNPP in grazed areas (1.86; 0.77 gm−2days−1 respectively) than in ungrazed areas (1.07; 0.67 gm−2days−1 respectively).
Conclusions
Grazed areas showed higher below-ground biomass, BNPP and turnover that ungrazed areas. Grazing has an important role in regulating both stock and dynamics of C in grassland ecosystems.
Keywords},
bibtype = {article},
author = {López-Mársico, L and Altesor, A and Oyarzabal, M and Baldassini, P and Paruelo, J M},
journal = {Plant and Soil},
number = {1-2}
}
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Field data and CENTURY simulation showed higher BNPP in grazed areas (1.86; 0.77 gm−2days−1 respectively) than in ungrazed areas (1.07; 0.67 gm−2days−1 respectively).\n \n Conclusions\n \n Grazed areas showed higher below-ground biomass, BNPP and turnover that ungrazed areas. 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