Buscar
Mostrando ítems 11-20 de 5371
Local extinctions of obligate frugivores and patch size reduction disrupt the structure of seed dispersal networks
(Wiley-Blackwell, 2018-11-01)
A central problem in ecology is to understand how human impacts affect plant-animal interactions that lead to effective seed dispersal services for plant communities. Seed dispersal services are the outcome of plant-frugivore ...
Patch size and shape and their relationship with tree and shrub species richness
(FUNDACION ROMULO RAGGIO, 2009)
Patch-size and isolation effects in the Fisher-Kolmogorov equation
(Springer, 2008-10-01)
We examine the classical problem of the existence of a threshold size for a patch to allow for survival of a given population in the case where the patch is not completely isolated. The surrounding habitat matrix is ...
Patch choice from a distance and use of habitat information during foraging by the parasitoid Ibalia leucospoides
(2012-06)
1. In environments in which resources are distributed heterogeneously, patch choice and the length of time spent on a patch by foragers are subject to strong selective pressures. This is particularly true for parasitoids ...
Temporal asynchrony in fine-root biomass may contribute to shrub and grass coexistence in mixed patches
(Wiley, 2014-01-15)
We described seasonal changes in fine-root biomass of a grass and a shrub dominant species in a plant community characteristic of the arid Patagonian Monte and then we inferred to want extent the observed differences could ...
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) ...
Diferentes Técnicas para el Alisado de Tensiones 3D
(Centro de Información Tecnológica, 2008)
Otimização dos parâmetros de monopolos planares de microfita para aplicações em sistemas de banda ultra larga
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em Engenharia ElétricaAutomação e Sistemas; Engenharia de Computação; Telecomunicações, 2008-10-21)
This work presents a theoretical and experimental investigation about the properties of microstrip antennas for ultra-wideband systems. Configurations of elliptic monopoles with different eccentricities and circular monopoles ...