IAI-Data-CRN_012_Austin_GRASS-DEC: Relative importance of dominant grass species in a water-limited ecosystem in the Patagonian steppe
Entry ID: IAIDIS758

[ Update this Record ]

Summary
Abstract: Changes in biodiversity due to human impact of domestic grazers are
occurring in many parts of the world, and the net effect of this
change could have detrimental effects on ecosystem functioning. The
selective removal of palatable grass species results in localized
species loss from areas subject to heaving grazing, which may have
consequences for carbon and nitrogen cycling. Moreover, in areas where
shrub encroachment is not occurring, the changes due to human impact
within functional groups may be very important. We explored the
relative importance of dominant grass species in a water-limited
ecosystem in the Patagonian steppe of temperate South
America. Dominant grass species from the Patagonian steppe in southern
Argentina were collected and used in a manipulative decomposition
experiment to examine the role of these species, which vary in
palatability, in affecting decomposition and nutrient turnover. All
litter types were decomposed singly and in all possible mixtures (7)
over a three-year period and effects of litter quality as well as
location next to the three grass species were evaluated. These data
were collected as part of the project CRN 012 examining the effects of
biodiversity on ecosystem functioning, led by Dr. Osvaldo Sala.

Parent DIF
This data set description is a member of a collection. The collection is described in
IAIDIS356


Geographic Coverage
 N: 15.0 S: -60.0  E: -30.0  W: -90.0

Data Set Citation
Dataset Originator/Creator: Austin, A.T.
Dataset Title: IAI-Data-CRN_012_Austin_GRASS-DEC
Dataset Series Name: The Role of Biodiversity and Climate in the Functioning of Ecosystems: A Comparative Study or Grasslands, Savannas, and Forests
Dataset Publisher: IAI
Issue Identification: IAI-Data-CRN_012_Austin_GRASS-DEC


Location Keywords
CONTINENT > SOUTH AMERICA > ARGENTINA
CONTINENT > SOUTH AMERICA


Science Keywords
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >DESERTS    [Definition]
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >GRASSLANDS    [Definition]
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >SHRUBLAND/SCRUB    [Definition]
BIOSPHERE >VEGETATION >CARBON    [Definition]
BIOSPHERE >VEGETATION >LITTER CHARACTERISTICS    [Definition]
BIOSPHERE >VEGETATION >NITROGEN    [Definition]
BIOSPHERE >VEGETATION >NUTRIENTS    [Definition]
BIOSPHERE >VEGETATION >VEGETATION SPECIES    [Definition]
BIOSPHERE >ECOLOGICAL DYNAMICS >COMMUNITY DYNAMICS >BIODIVERSITY FUNCTIONS    [Definition]


ISO Topic Category
BIOTA


Project
ESIP >Earth Science Information Partners Program    [Information]
IAI-DIS >Inter-American Institute for Global Change Research    [Information]
CRN >Collaborative Research Network Program (IAI)    [Information]


Keywords
nutrient cycling
nutrients
IAI_Science_CRN
Patagonia


Data Set Progress
COMPLETE


Originating Center


Data Center
Inter-American Institute for Global Change Research, Data and Information System    [Information]
Data Center URL: http://disbr1.iai.int/

Data Center Personnel
Name: LUIS MARCELO ACHITE
Phone: (55-12) 3945-6868
Fax: (55-12) 3941-4410
Email: lmachite at dir.iai.int
Contact Address:
Inter-American Institute for Global Change Research- IAI
Avenida dos Astronautas, 1758, Jardim da Granja
City: Sao Jose dos Campos
Province or State: Sao Paulo
Postal Code: 12227-010
Country: BRAZIL


Personnel
AMY T. AUSTIN
Role: TECHNICAL CONTACT
Phone: +54-11-4524-8070x8105
Email: austin at ifeva.edu.ar



Creation and Review Dates
DIF Creation Date: 2005-02-18
Last DIF Revision Date: 2005-11-09

[ Update this Record ]


Link to Web Site