Urbanization influences the food availability and quality for birds in many ways. Although a great amount of is provided incidentally or intentionally urban areas, quantity insect-based can be reduced cities. We studied role one artificial source, insects smashed on front panels cars, Finland, more specifically city Rovaniemi, by conducting questionnaire research, searching data from databases ...

Interference competition is ubiquitous in nature. Yet its effects on resource exploitation remain largely unexplored for species that compete for dynamic resources. Here, I present a model of exploitative and interference competition with explicit resource dynamics. The model incorporates both biotic and abiotic resources. It considers interference competition both in the classical sense (i.e. ...

The availability of high quality resources is an important factor driving community structure and reproductive mode of animals. Parthenogenetic reproduction prevails when resources are available in excess, whereas sexuality correlates with resource shortage. We investigated the effect of resource availability on the community structure of oribatid mites in a laboratory experiment. Availability ...

rangelands renewable resources play a very important role in ecosystem regulating, preserving plant genetic reservoirs, water cycle as well as providing large parts of forage requirements. these resources were considered to be a basis for sustainable development and also a basic platform for various economic activities. during the recent years in iran, these valuable sources were subjected to s...

Rangelands renewable resources play a very important role in ecosystem regulating, preserving plant genetic reservoirs, water cycle as well as providing large parts of forage requirements. These resources were considered to be a basis for sustainable development and also a basic platform for various economic activities. During the recent years in Iran, these valuable sources were subjected to s...

Rangelands are the main sources of forage for livestock feeding by localpeople. Beside forage production, rangeland ecosystems provide many other goods andservices such as medicinal plants, recreation, soil and water conservation, wildlife habitat,fishing, hunting, hiking, etc. Nevertheless, there are no much information about the waythat local communities think about the rangelands goods and s...

The current research is an applied study, which uses field data and avails itself of a descriptive-correlational and causal-correlation design to analyse the relationships between variables. This study was an attempt to identify variables affecting rural participation in cooperatives forest by-products in Ilam. Population of this research is exploiters of forests' by products in Ilam. The numbe...

together with fire and mowing. The team found that native perennials reduced soil moisture, soil nitrogen, and light to lower levels than did exotic annuals. This ability to outcompete the exotic species for these resources means that native perennials should be able to increase in abundance. This suggests that the current rarity of native perennials at the researchers’ site is caused by native...