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Variation of morphological and chemical traits in sexes of the dioecious perennial grass Poa ligularis in relation to shrub cover and aridity in Patagonian ecosystems
(Springer Tokyo, 2016-01)
Sexes of dioecious species may have dimorphic responses to environmental variation due to differences in resource requirements and reproductive costs. We analyzed the effect of aridity/relative shrub cover, and vicinity ...
Land degradation affects shrub growth responses to precipitation in a semiarid rangeland of north-eastern Patagonia (Argentina)
(Wiley Blackwell Publishing, Inc, 2018-05)
Arid land degradation diminishes the proportion of precipitation conducted to infiltration and increases the proportion lost to run-off and evaporation. Consequently, we expect that the effects of annual precipitation on ...
Effects of forest preservation, livestock exclusion and use of shrubs as potential nurses on planting success of an endangered tree
(Wiley Blackwell Publishing, Inc, 2021-05-27)
Domestic livestock are widespread in seasonally dry forests, likely causing forest degradation and limiting tree seedling establishment. Shrubs can play an important role in facilitating tree regeneration, by protecting ...
Growth and reproductive post-fire responses of two shrubs in semiarid Patagonian grasslands
(Csiro Publishing, 2015-05)
Variation in fire intensity affects the post-fire survival and growth of shrubs. We examined effects of maximum fire temperature (a proxy for fire intensity) on the survival, growth and reproductive performance of the ...
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 ...
Grazing-induced morphological and growth rate changes in Anarthrophyllum rigidum, a Patagonian leguminous shrub
(Elsevier, 2013-04)
Grazing influences the morphology and growth rate of shrubs, and consequently, their population dynamics. It has been shown that grazing directly affects the growth of shrubs. On the other hand, the reduction of grass ...
Galler-induced reduction of shoot growth and fruit production in the shrub Colliguaja integerrima (Euphorbiaceae)
(2005)
We evaluated experimentally the effect of a gall-maker insect on vegetative and reproductive traits of the
shrub Colliguaja integerrima (Euphorbiaceae). We performed two experiments: (1) a chemical (insecticide)
exclusion ...
Resource partitioning and interactions enable coexistence in a grass-shrub steppe
(Academic Press Ltd - Elsevier Science Ltd, 2010-10)
We revisited a growth-form removal experiment after 12 years with the aim to compare the long-term population responses of three shrub species. Specifically, we were interested to know if the resource partitioning and plant ...
Livestock Grazing Impacts on Herbage and Shrub Dynamics in a Mediterranean Natural Park
(2013-03)
Shrub encroachment can be explained by the abandonment of extensive livestock farming and changes to land use, and it is a common problem in the Mediterranean mountain pastures of Europe, with direct effects on biodiversity ...
Bottom-up effects of nutrient availability on flower production, pollinator visitation, and seed output in a high-Andean shrub
(SPRINGER, 2005-03)
Soil nutrient availability directly enhances vegetative growth, flowering, and fruiting in alpine ecosystems. However, the impacts of nutrient addition on pollinator visitation, which could affect seed output indirectly, ...