Grassland biomass dynamics along an altitudinal gradient in the Pampa

Above and below-ground biomass and necromass dynamics were assessed for 3 grassland sites located at 550, 850, and 1,025 m elevation in Sierra de la Ventana range (38 degrees 1'S 62 degrees 2'W) in Argentina. The objective was to determine if differences existed in dry matter structure, my...

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Autores principales: Pérez, Carolina Alejandra, Frangi, Jorge Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2000
Materias:
Ciencias Agrarias
Aboveground
Belowground
Litter
Phytomass
Productivity
Roots
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127899
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127899
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Aboveground
Belowground
Litter
Phytomass
Productivity
Roots
spellingShingle Ciencias Agrarias
Aboveground
Belowground
Litter
Phytomass
Productivity
Roots
Pérez, Carolina Alejandra
Frangi, Jorge Luis
Grassland biomass dynamics along an altitudinal gradient in the Pampa
topic_facet Ciencias Agrarias
Aboveground
Belowground
Litter
Phytomass
Productivity
Roots
description Above and below-ground biomass and necromass dynamics were assessed for 3 grassland sites located at 550, 850, and 1,025 m elevation in Sierra de la Ventana range (38 degrees 1'S 62 degrees 2'W) in Argentina. The objective was to determine if differences existed in dry matter structure, mycorrhizae infection, net primary productivity (NPP) partitioning to aboveground and belowground tissues, senescence and litter fall, and seasonal patterns of dry matter fluxes with altitude. Soil properties, water budgets and temperature at the sites were also assessed. Biomass plus necromass (without litter) was 1,184 +/- 41, 1,208 +/- 70, and 1,507 +/- 63 gDM m-2 for the lower, intermediate and upper sites, respectively. The below:aboveground biomass ratio increased with elevation. Total NPP was 1,131, 1,280, and 1,157 gDM m-2 year-1, respectively, for the 3 grassland sites. belowground allocation of net productivity increased with altitude. Both mass and proportion of thin roots increased with elevation, and so did mycorrhizae infection. The aboveground and belowground turnover rates decreased with altitude, but rates were faster for aboveground tissues. We found different temporal patterns in productivity, senescence and disappearance among grassland sites despite similar total NPP. Water holding capacity of soils and temperature were important factors related to several of the observed trends in structure and function. Differences in grassland structure and fluxes are discussed as related to soils and local climate at each site.
format Articulo
Articulo
author Pérez, Carolina Alejandra
Frangi, Jorge Luis
author_facet Pérez, Carolina Alejandra
Frangi, Jorge Luis
author_sort Pérez, Carolina Alejandra
title Grassland biomass dynamics along an altitudinal gradient in the Pampa
title_short Grassland biomass dynamics along an altitudinal gradient in the Pampa
title_full Grassland biomass dynamics along an altitudinal gradient in the Pampa
title_fullStr Grassland biomass dynamics along an altitudinal gradient in the Pampa
title_full_unstemmed Grassland biomass dynamics along an altitudinal gradient in the Pampa
title_sort grassland biomass dynamics along an altitudinal gradient in the pampa
publishDate 2000
url http://sedici.unlp.edu.ar/handle/10915/127899
work_keys_str_mv AT perezcarolinaalejandra grasslandbiomassdynamicsalonganaltitudinalgradientinthepampa
AT frangijorgeluis grasslandbiomassdynamicsalonganaltitudinalgradientinthepampa
bdutipo_str Repositorios
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