Home > Search Results: keywords:"biotic homogenization"
Search:
Search Tips :: Advanced Search
Search collections:
Sort by: Display results: Output format:
National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Species traits and ecological conditions linked to bird colonisation of cities
 Grünwald, Jan ; Reif, Jiří (advisor) ; Sedláček, Ondřej (referee)
Human settlements are a novel habitat type and species must respond to its ongoing expansion. For effective conservation of biodiversity, it is important to understand the mechanisms underlying these responses. This thesis focuses on urbanization in birds, from both the individual and community perspectives. The aim of this thesis is to find out if there are any "pre-adaptations" in some bird species to be successful city dwellers or if all birds can potentially exploit the urban environment when local conditions allow. According to the reviewed literature, I conclude that the urbanization in birds is not a universal pattern, but there are some specific traits shared by most of the urban birds. The successful urban species are mostly omnivorous or granivorous, they breed in trees or in cavities and, they are often ecological generalists. They are sometimes represented by non-native species occurring in the cities all over the world.
Detailed record
Homogenization of bird communities
 Krsová, Magdalena ; Reif, Jiří (advisor) ; Sedláček, Ondřej (referee)
Biotic homogenization is characterized as a process by which means species invasions and extinctions increase the genetic, taxonomic or functional similarity among ecological communities and this process is associated with modern biodiversity crisis. The most prominent patterns of recent homogenization of species composition in avian communities are loss of native species and their replacement by non-native species, expanding habitat generalists at the expense of native and more specialized species. As a result, increases in local or alpha-diversity typically occur at the expense of decreased beta-diversity or increased community similarity among regions. These patterns are probably caused by introduction non-native species, urbanization, landscape fragmentation and disturbance. These results suggest that conservation effort should focus on protection of unique habitats where ecologically specialised species occur. Further research in this area could provide better basis for generation of simulation models aimed to predicting changes in community composition.
Detailed record

Interested in being notified about new results for this query?
Subscribe to the RSS feed.
Digital Repository :: Search :: Submit :: Personalize :: Help
Powered by Invenio v1.1.2
Maintained by admin.invenio@techlib.cz
This site is also available in the following languages:
Česky  English