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Endemic tenebrionids (Coleoptera: Tenebrionidae) from the Patagonian steppe: a preliminary identification of areas of micro-endemism and richness hotspots
(Wiley, 2012-02)
Based on data from sixteen museum collections we listed the endemic tenebrionids that inhabit the Patagonian steppe. Then, according to the geographical location of the species, we identified areas of micro-endemism and ...
Grazing pressure interacts with aridity to determine the development and diversity of biological soil crusts in Patagonian rangelands
(John Wiley & Sons Ltd, 2019-10)
Grazing is directly related to land degradation and desertification in global drylands. Grazing impacts on vascular plants, reasonably well-known, depend on its intensity and are modulated by local aridity conditions. ...
Spatial heterogeneity provides organic matter refuges for soil microbial activity in the Patagonian steppe, Argentina
(Pergamon-Elsevier Science Ltd, 2009-06)
In arid and semi-arid ecosystems that are frequently classified as water limited, it is unclear how spatial and temporal variability of vegetation and climate could affect microbially-mediated soil processes. Our objective ...
Long-term impact of domestic ungulates versus the local controls of the litter decomposition process in arid steppes
(Springer, 2021-08)
Aims: Soil processes in arid ecosystems are strongly controlled by resource scarcity. Grazing intensification can induce changes in ecosystem processes through multiple pathways, adding new constraints to those of local ...
Species tree phylogeny, character evolution, and biogeography of the patagonian genus Anarthrophyllum Benth. (Fabaceae)
(Springer Heidelberg, 2018-03)
Geologic events promoting the aridization of southern South America contributed to lineage divergences and species differentiation through geographic (allopatric divergence) and biotic and abiotic factors (ecological ...
Size of precipitation pulses controls nitrogen transformation and losses in an arid Patagonian ecosystem
(Springer, 2010-05)
Arid ecosystems receive precipitation pulses of different sizes that may differentially affect nitrogen (N) losses and N turnover during the growing season. We designed a rainfall manipulation experiment in the Patagonian ...
Phylogeography and palaeodistribution modelling of Nassauvia subgenus Strongyloma (Asteraceae): exploring phylogeographical scenarios in the Patagonian steppe
(Wiley, 2014-11)
The Patagonian steppe is an immense, cold, arid region, yet phylogeographically understudied. Nassauvia subgen. Strongyloma is a characteristic element of the steppe, exhibiting a continuum of morphological variation. This ...
Worlds apart: Location above- or below-ground determines plant litter decomposition in a semi-arid Patagonian steppe
(Wiley Blackwell Publishing, Inc, 2021-08)
While considerable attention has been devoted to how precipitation modulates net primary productivity in arid and semi-arid ecosystems, the emergence of multi-faceted controls on carbon (C) turnover suggests that there is ...
A complex interaction networks controls coexistence and relative abundances in grass-shrub Patagonian steppes
(Wiley, 2014-02)
1. The coexistence of shrubs and grasses has intrigued ecologists for the past century, and the conundrum of shrub-grass coexistence is at the core of debates on the functioning of semi-arid ecosystems. Here, we explored ...
Capacidad competitiva y tolerancia a la defoliación en Stipa clarazii, Stipa tenuis y Stipa ambiguaCompetitive ability and defoliation tolerance in Stipa clarazii, Stipa tenuis y Stipa ambigua
(Fundacion Romulo Raggio, 2006-01)
Mayores valores de tasas de crecimiento, capacidad de proliferación radical, densidad de longitud de raíces y capacidad de absorción de nutrientes se han asociado con un aumento en la adquisición de nutrientes en las ...