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Mostrando ítems 1-10 de 11
Latitudinal variation of genecological traits in native grasses of Patagonian rangelands
(Csiro Publishing, 2013-11-01)
Geographical variation in genetically based traits helps to elucidate the effect of distinct ecological and evolutionary processes on widespread plants. Whereas abundant information exists on genetic patterns of woody ...
Morphological and growth responses to water stress of two sub-populations of Bromus pictus from soils with contrasting water availability
(Sociedad de Biología de Chile, 2006)
Phenotypic plasticity as an index of drought tolerance in three Patagonian steppe grasses
(Oxford University Press, 2012-09)
Background and AimsDespite general agreement regarding the adaptive importance of plasticity, evidence for the role of environmental resource availability in plants is scarce. In arid and semi-arid environments, the ...
Testing the role of biotic stress in the stress gradient hypothesis. Processes and patterns in arid rangelands
(Wiley Blackwell Publishing, Inc, 2011-06)
Since many arid ecosystems are overstocked with domestic herbivores, biotic stress could have a stronger influence in modulating the balance of species interactions than expected from the stress gradient hypothesis (SGH). ...
Estudios bioquímicos y moleculares del metabolismo de fructanos en respuesta a estreses ambientales en Gramíneas nativas
(Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires, 1999)
Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off: Grass recruitment and grazing in Patagonia
(Academic Press Ltd - Elsevier Science Ltd, 2021-06)
We explored the effect of N addition and adult canopy competition on the recruitment of lost preferred species in the Patagonian steppe, where a decelerated N cycling scenario (sensu Ritchie et al., 1998) had been previously ...
Grass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-off
(Elsevier, 2021-03-09)
We explored the effect of N addition and adult canopy competition on the recruitment of lost preferred species in the Patagonian steppe, where a decelerated N cycling scenario (sensu Ritchie et al., 1998) had been previously ...
Patchiness of grass mycorrhizal colonization in the Patagonian steppe
(Academic Press Ltd - Elsevier Science Ltd, 2017-02)
In arid and semi-arid ecosystems vegetation is often arranged in high-density patches imbedded in an extensive matrix dominated by bare soil. This study explores the importance of vegetation pattern in the relationship ...
Under pressure from above: Overgrazing decreases mycorrhizal colonization of both preferred and unpreferred grasses in the Patagonian steppe
(Elsevier, 2019-08)
Arbuscular mycorrhizal fungi (AMF) are related to plant community dynamics and ecosystem functioning. Overgrazing can negatively affect plant performance, and consequently unbalance the association with AMF. We studied the ...
Mind the gap among patches in arid plant communities: Rapid root proliferation in response to N addition
(Oxford University Press, 2017-11)
Aims: In arid communities, it has been proposed that individual plants can extend their roots beyond their canopy exploring neighbouring bare ground areas. This becomes relevant in systems where the vegetation is distributed ...