Niche Shifts
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Intraspecific food resource partitioning in Brazilian silverside Atherinella brasiliensis (Atheriniformes: Atherinopsidae) in a tropical estuary, Brazil
RESUMO Nós investigamos a partição intraespecífica de recursos alimentares do peixe-rei Atherinella brasiliensis em um estuário tropical. Um total de 1.099 estômagos foi analisado, e a dieta foi constituída principalmente de Gastropoda, Larva de Ceratopogonidae, Larva de Decapoda, Calanoida, Cyclopoida, Hymenoptera e Brachyura. A análise de ordenaç�
Neotrop. ichthyol.. Publicado em: 18/07/2019
-
2. Anticipating the response of the Brazilian giant earthworm (Rhinodrilus alatus) to climate change: implications for its traditional use
Abstract Our understanding of the impacts of ongoing global warming on terrestrial species has increased significantly during the last several years, but how climatic change has affected, and will affect, the distribution of earthworms remains largely unknown. We used climate niche modeling to model the current distribution of the giant earthworm Rhinodrilus
An. Acad. Bras. Ciênc.. Publicado em: 17/12/2018
-
3. Padrões distintos de congruência climática em duas espécies invasoras de prosopis em zonas semi-áridas da América do Sul
Baseados nas informações climáticas e nos registros de ocorrência, modelos de nicho ecológico (MNE) são uma importante oportunidade de identificar áreas sob risco ou vulneráveis à invasão biológica. Estes modelos se apóiam na suposição de que existe congruência entre os climas das regiões nativa e invadida para prever a distribuição potenci
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2012
-
4. Consequences of global climate change for geographic distributions of cerrado tree species
The present study applies a series of new techniques to understand the conservation of Cerrado tree species in the face of climate change. We applied techniques from the emerging field of ecological niche modeling to develop a first-pass assessment of likely effects of climate change on tree species’ distributions in the Cerrado biome by relating known occ
Biota Neotrop.. Publicado em: 2003
-
5. Niche conservatism above the species level
Traits that enable species to persist in ecological environments are often maintained over time, a phenomenon known as niche conservatism. Here we argue that ecological niches function at levels above species, notably at the level of genus for mammals, and that niche conservatism is also evident above the species level. Using the proxy of geographic range si
National Academy of Sciences.
-
6. Birds track their Grinnellian niche through a century of climate change
In the face of environmental change, species can evolve new physiological tolerances to cope with altered climatic conditions or move spatially to maintain existing physiological associations with particular climates that define each species' climatic niche. When environmental change occurs over short temporal and large spatial scales, vagile species are exp
National Academy of Sciences.
-
7. Parallel inactivation of multiple GAL pathway genes and ecological diversification in yeasts
Understanding the evolutionary relationship between genome content and ecological niche is one of the fundamental challenges of biology. The distinct physiologies of yeast species provide a window into how genomes evolve in concert with niche. Although the enzymes of the well studied yeast galactose utilization pathway are present in all domains of life, we
National Academy of Sciences.
-
8. Ecological Consequences of Island Colonization by Southwest Pacific Birds, I. Types of Niche Shifts
The land and fresh-water birds of the southwest Pacific islands derive mainly from New Guinea and offer a favorable situation for studying ecological consequences of island invasions. The reduction of competition on species-poor islands permits some colonizing species to expand their niches spatially, by occupying altitudinal bands, types of habitats, and/or
-
9. Niches, models, and climate change: Assessing the assumptions and uncertainties
As the rate and magnitude of climate change accelerate, understanding the consequences becomes increasingly important. Species distribution models (SDMs) based on current ecological niche constraints are used to project future species distributions. These models contain assumptions that add to the uncertainty in model projections stemming from the structure
National Academy of Sciences.
-
10. Birds on islands in the sky: Origin of the montane avifauna of Northern Melanesia
Biogeographers have long been fascinated by the disjunct distributions of species stranded on mountaintops. This paper analyzes, for the montane bird populations of Northern Melanesian islands, how many such populations there are, why they are restricted to mountains, and how they dispersed to mountains. The number of populations increases with island elevat
-
11. Adaptive plasticity in hatching age: a response to predation risk trade-offs.
The life histories of many animals are characterized by niche shifts, the timing of which can strongly affect fitness. In the tree frog Agalychnis callidryas, which has arboreal eggs, there is a trade-off between predation risks before and after hatching. When eggs are attacked by snakes, tadpoles escape by hatching rapidly and falling into the water below.
-
12. Genetic introgression as a potential to widen a species' niche: Insights from alpine Carex curvula
Understanding what causes the decreasing abundance of species at the margins of their distributions along environmental gradients has drawn considerable interest, especially because of the recent need to predict shifts in species distribution patterns in response to climatic changes. Here, we address the ecological range limit problem by focusing on the sedg
National Academy of Sciences.