Sentences with phrase «by ecological conditions»

This in turn supports the idea that, in birds, tool use for foraging is facilitated by ecological conditions typical of islands, such as reduced competition for embedded prey and low predation risk.

Most scientists thought that a bird's preference for a certain number of companions had to be determined at least in part by life experience or by ecological conditions such as food abundance or the threat of predators.

Not exact matches

USDA regulations require that organic farms be «managed in accordance with the Act and regulations in this part to respond to site - specific conditions by integrating cultural, biological, and mechanical practices that foster cycling of resources, promote ecological balance, and conserve biodiversity» (USDA Agricultural Marketing Service, 2000).

An ecological climax — as represented by the biological communities of Africa — embodies the maximum energy - flux possible in a given set of physical and climatic conditions.

«Microbiologists have rarely taken into account fluid flow as an ecological parameter, whereas physicists have just recently started to pay attention to microbes,» he says, adding: «The ability to directly watch microbes under the controlled flow conditions afforded by microfluidic technology — which is only about 15 years old — has made all the difference in allowing us to discover and understand this effect of flow on microbes.»

Eagles and hawks / kites are present, but the assemblage is dominated by parrots and the peafowl Pavo, an ecological indicator of wooded conditions.

«Correctly identifying an invasive species as either native or non-native is important for developing sound policy, management and scientific research programs, because effective responses depend on knowing whether the species» dominance is caused by ecological or evolutionary novelty, changes in environmental conditions that facilitate it or both,» Taylor said.

Dr Cameron Petrie, director of the ERC - funded project and co-author on the study, commented, «We are investigating the nature of human adaptation to the ecological conditions created by the winter and summer rainfall systems of India.

The responsibility of each citizen and community to ensure meaningful decision - making that is based on the twin principles of ecological integrity and socio - economic equity, conditioned in the interim by a «common but differentiated responsibility» in which those currently rich within the country take on a greater role and / or are incentivised or forced to to give up their excessively consumptive lifestyles in order for the poor to have adequate levels of human security.

You will begin this ecological excursion by travelling to Yal Ku Lagoon in air - conditioned comfort.

The prime goal was a fresh assessment of ice, ocean and ecological conditions on the stretch of Antarctic coast south of Australia and New Zealand a century after an arduous expedition led by Sir Douglas Mawson did the same.