Latitudinal Diversity Gradient
Mostrando 1-12 de 14 artigos, teses e dissertações.
-
1. Palm species richness, latitudinal gradients, sampling effort, and deforestation in the Amazon region
ABSTRACT Palms are most diverse in warm and humid regions near the equator. Though palms remain relatively well conserved, they are under increasing pressure from deforestation. Here, we analyze patterns of palm species richness relative to latitudinal gradient, sampling effort, and deforestation in the Amazon, and compare patterns of richness and floristic
Acta Bot. Bras.. Publicado em: 19/03/2018
-
2. Distribution patterns of ferns and lycophytes in the Coastal Region of the state of Rio Grande do Sul, Brazil
ABSTRACT A survey of ferns and lycophytes of the Coastal Region of the state of Rio Grande do Sul (CRRS) was performed based on field work and collections of the main regional herbaria. The following were evaluated for each species: preferential habits (terrestrial, epiphytic or aquatic), geographic distribution patterns and habitats (forest, grassland, and
Acta Bot. Bras.. Publicado em: 19/04/2016
-
3. Large-scale patterns in morphological diversity and species assemblages in Neotropical Triatominae (Heteroptera: Reduviidae)
We analysed the spatial variation in morphological diversity (MDiv) and species richness (SR) for 91 species of Neotropical Triatominae to determine the ecological relationships between SR and MDiv and to explore the roles that climate, productivity, environmental heterogeneity and the presence of biomes and rivers may play in the structuring of species asse
Mem. Inst. Oswaldo Cruz. Publicado em: 06/12/2013
-
4. Macroecologia do zooplâncton continental: padrões latitudinais e componentes locais e regionais na determinação da diversidade global / Macroecology of continental zooplankton: latitudinal patterns and local and regional components in determining global diversity
One of the oldest and best known global biological patterns in ecology is the latitudinal gradient of richness, characterized by a decrease in the number of species from Equator toward the poles. Several hypotheses, even today, attempt to explain the variation that occurs in the pattern of diversity of many animal and plants. Despite the advances that have b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2012
-
5. Padrões de variação da diversidade funcional e de espécies em comunidades arbóreas na Floresta Atlântica do sul do Brasil
In the last years, knowledge about the functionality of tropical forest has grown. Ways of quantifying beta-diversity causes are still under developing and questions about what factors determine diversity variation, especially on a regional scale, have not been answered yet. Our aim was to identify the drivers that are defining variation of functional and sp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
6. Estrutura e aspectos fitogeográficos de remanescentes florestais na Restinga Sulbrasileira / Estrutura e aspectos fitogeográficos de fragmentos florestais na Restinga Sulbrasileira
As restingas constituem um mosaico de ambientes presentes nas planícies costeiras brasileiras. Sua vegetação se desenvolve em areias quartzosas e engloba variadas formações, de comunidades herbáceas de dunas até florestas. A restinga sulbrasileira se estende entre as latitudes 28°30'S, no estado de Santa Catarina, e 33°45'S, no extremo sul do Rio Gr
Publicado em: 2009
-
7. Genetic characterization of broad-snouted caiman (Caiman latirostris) populations by microsatellites markers. / Caracterização genética de populações de jacaré-de-papo-amarelo (Caiman latirostris), utilizando marcadores microssatélites.
A component considered critical for the managment well succeed of wild populations it is the maintenance of genetic variation. In the intention of evaluating the extend and the distribution of the existent genetic variability in populations of Caiman latirostris, nine populations distributed along the latitudinal axis of the distribution of the species in Br
Publicado em: 2004
-
8. Eastern Pacific molluscan provinces and latitudinal diversity gradient: no evidence for "Rapoport's rule".
"Rapoport's rule," which has gained wide acceptance as a potential explanation for latitudinal and other diversity gradients, holds that mean latitudinal range of species decreases toward the equator. We analyzed latitudinal ranges of 2838 eastern Pacific marine molluscan species, a subset of which figured in the original formulation of Rapoport's rule, and
-
9. Ecology Drives the Worldwide Distribution of Human Diseases
Identifying the factors underlying the origin and maintenance of the latitudinal diversity gradient is a central problem in ecology, but no consensus has emerged on which processes might generate this broad pattern. Interestingly, the vast majority of studies exploring the gradient have focused on free-living organisms, ignoring parasitic and infectious dise
Public Library of Science.
-
10. Latitudinal difference in biodiversity caused by higher tropical rate of increase
Tropical diversity has generally exceeded temperate diversity in the present and at points in the past, but whether measured differences have remained relatively constant through time has been unknown. Here we examine tropical vs. temperate diversities from the Neogene to Recent using the within-habitat diversity measure Fisher's alpha of Cenozoic benthic fo
The National Academy of Sciences.
-
11. Evolutionary consequences of changes in species' geographical distributions driven by Milankovitch climate oscillations
We suggest Milankovitch climate oscillations as a common cause for geographical patterns in species diversity, species' range sizes, polyploidy, and the degree of specialization and dispersability of organisms. Periodical changes in the orbit of the Earth cause climatic changes termed Milankovitch oscillations, leading to large changes in the size and locati
The National Academy of Sciences.
-
12. Molecular Analysis of Geographic Patterns of Eukaryotic Diversity in Antarctic Soils
We describe the application of molecular biological techniques to estimate eukaryotic diversity (primarily fungi, algae, and protists) in Antarctic soils across a latitudinal and environmental gradient between approximately 60 and 87°S. The data were used to (i) test the hypothesis that diversity would decrease with increasing southerly latitude and environ
American Society for Microbiology.