What do we mean by refugia?
The term ‘refugia’ was originally used to describe the restricted full-glacial locations of modern mid- and high-latitude taxa, especially trees and shrubs. We discuss the extension of this original use to other situations, including its widening to encompass ‘interglacial refugia’.
What is the refugia theory?
The refugium theory suggests that existing genetic and species diversity is shaped by historical environmental changes and predicts that the long-term persistence of biodiversity is dependent on refugia.
What is refugia in ecology?
In the ecological literature, ‘refugia’ have been defined as habitats that convey spatial and temporal resistance and/or resilience to biotic communities affected by disturbances (Sedell et al., 1990) or as places or times where the negative effects of disturbance are lower than those in the surrounding area (or time).
Why did refugia occur?
In biology, a refugium (plural: refugia) is a location which supports an isolated or relict population of a once more widespread species. This isolation (allopatry) can be due to climatic changes, geography, or human activities such as deforestation and overhunting.
What is climate change refugia?
Climate change refugia are “areas that remain relatively buffered from contemporary climate change over time and enable persistence of valued physical, ecological, and socio-cultural resources” [4]. The key attribute of refugia is their relative persistence, despite changes in the climate in the surrounding landscape.
What is forest refugia?
Climate change refugia are areas relatively buffered from contemporary climate change over time that enable persistence of valued physical, ecological, and socio-cultural resources (Morelli et al. 2016). Across the Northwest, many different types of refugia are being defined, mapped, and evaluated.
What is refugia in the parasite population?
What is refugia? Refugia is the proportion of the total parasite. population that is not selected for antiparasitic drug. treatment—essentially, those parasites that are in. “refuge” from the drug.
Why is assisted migration good?
Assisted migration can help ensure that a species occurs in many redundant locations or across a range of conditions, which helps reduce risk from uncertain climate impacts. Assisted migration can help populations and species move across ecological barriers in fragmented landscapes.
What is the highlands refugia hypothesis and why is it important to North American stream ecosystems?
The refugia hypothesis maintains that the stable coexistence of predator and prey depends on the either spatial refuges, regions in the distribution of prey that are inaccessible to the predators, or age/size refuges, in which the prey have attained sufficient size or strength to resist attack.
Why do some parasites become resistant to antiparasitic drugs?
There is strong evidence that resistance to antimalarial drugs is associated to parasite genetic factors. Simple, double, or quadruple mutations in different genes enable the parasite to resist to the antimalarial drugs.
What controversy is there about assisted migration?
While assisted migration has the potential to allow species that have poor natural dispersal abilities to avoid extinction, it has also sparked intense debate over the possibility of the introduction of invasive species and diseases into previously healthy ecosystems.