Search
Now showing items 1-10 of 1040
Vegetation and terrain drivers of infiltration depth along a semiarid hillslope
(Elsevier Science, 2018-12)
An improved understanding of the drivers controlling infiltration patterns in semiarid regions is of key importance, as they have important implications for ecosystem productivity, retention of resources and the restoration ...
Comparative bioavailability study of two 100-mu g daily 17-beta-estradiol transdermal delivery systems: Once-a-week matrix patch and twice-a-week reservoir patch in healthy postmenopausal women
(Excerpta Medica Inc, 1999-03-01)
An open-label, randomized, a-period, crossover study was conducted in healthy postmenopausal women to assess the relative bioavailability of 17-beta-estradiol from a new matrix system versus a standard reservoir transdermal ...
Aboveground vegetation and perennial grass seed bank in arid rangelands disturbed by grazing
(Elsevier, 2015)
Recruitment by seeds can be an important mechanism for recovery of plant communities following disturbance. Our objective was to assess the density and spatial patterning of perennial grass (highly preferred by herbivores) ...
Biological and physical factors affecting the colonization of vegetation-free patches in a SW Atlantic salt marsh
(Inter-Research, 2015-07)
In many Northern Hemisphere salt marshes, recovery of disturbance-generated bare areas usually occurs within a few years. However, in some southwestern Atlantic marshes, bare patches may remain unchanged for several years. ...
Landscape connectivity and the role of small habitat patches as stepping stones: an assessment of the grassland biome in South America
(Springer, 2017-12)
Connectivity losses lead to a reduction of the amount of habitat resources that can be reached and used by species, and hence to a decline in the ranges and abundance of multiple taxa. Despite the recognized important role ...
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 ...
Overland flow from plant patches: coupled effects of preferential infiltration, surface roughness and depression storage at the semiarid Patagonian Monte
(Elsevier Science, 2016-02)
The objective of this study is to characterize and quantify the overland flow generated from the plant patch areas of spotted vegetation towards the immediate surrounding bare ground including the coupled effects of ...
Patches Approach to Investigate the Populational Dynamics in Dengue
(Sociedade Brasileira de Matemática Aplicada e Computacional, 2017-04-01)
ABSTRACT In areas where resources are located in patches or discrete locations, human dispersal is more conveniently modeled, in which the population is divided into discrete patches. In this work we develop a general ...
Structure of vegetation patches in northwestern Patagonia, Argentina
(Springer, 2009-09)
Vegetation of arid and semiarid environments has in general a patchy distribution. Our objective was to (a) determine several qualitative and quantitative analytical characteristics of vegetation patches in an arid zone ...