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Influence of Soil Water Status on Arbuscular Mycorrhizas in Three Perennial Grasses in Central Argentina
(Finnish Zoological and Botanical Publishing Board, 2008-12)
In this field study, we determined the effects of water stress, rainfed or irrigated conditions on the arbuscular mycorrhizal fungal (AMF) root colonization in the late-seral Stipa clarazii, the earlier-seral S. tenuis and ...
Relationship between plant nitrogen conservation strategies and the dynamics of soil nitrogen in the arid Patagonian Monte, Argentina
(Springer, 2003-08)
During three consecutive years with contrasting precipitation, we analysed the relationship between strategies of N conservation in the dominant plant functional groups (perennial grasses and evergreen shrubs) of the ...
A plurality of causal mechanisms explains the persistence or transience of soil seed banks
(Academic Press Ltd - Elsevier Science Ltd, 2010-02)
Annual forbs form short-term persistent soil seed banks whereas perennial grasses form mostly transient ones in the central Monte desert. A conceptual framework predicts that annual forb seeds will have primary dormancy, ...
Weed effects on the establishment and nutritive value of pastures with different annual/perennial ratio
(Wiley, 2020-12)
Livestock intensification is increasing weed invasion in pastures. We performed an experiment near Buenos Aires, Argentina, to evaluate the impact of weeds on temperate cultivated pastures. We sowed 1,700 viable seeds m–2 ...
Interacting effects of soil degradation and precipitation on plant productivity in NE Patagonia, Argentina
(Taylor, 2016-01)
Our objective was to examine the effects of inter-annual variation of precipitation on productivity of two dominant species (Chuquiraga avellanedae, an evergreen shrub, and Nassella tenuis, a perennial grass) in two ...
Seed rain alteration related to fire and grazing history in a semiarid shrubland
(Academic Press Ltd - Elsevier Science Ltd, 2015-10-02)
In arid environments, vegetation is distributed in patches. Herbivory and fires promote changes and seed rain plays a key role in the soil seed bank and the colonization of new spaces. This study focuses on the effect of ...
Tiller hierarchy and defoliation frequency determine bud viabilityn in the grass Poa ligularis
(Springer Tokyo, 2011-09)
Bud viability after various defoliation frequency treatments was determined in the perennial bunchgrass Poa ligularis under arid field conditions from 2002 to 2005. Bud respiratory activity was examined on various stem ...
Effect of drought on morphological and functional traits of Poa ligularis and Pappostipa speciosa, native perennial grasses with wide distribution in Patagonian rangelands, Argentina
(Csiro Publishing, 2013-07)
Poa ligularis Nees. Ap. Steudel and Pappostipa speciosa (Trin. et Rupr.) Romaschenko are dominant perennial grasses in the arid Patagonian rangelands of Argentina. Both species are exposed to periods of water shortage ...