Sentences with phrase «winter food availability»
Not exact matches
Some white storks have stopped migrating from Europe to sub-Saharan Africa in the winter, because of the availability of food in landfills.
https://www.scientificamerican.com/
«Our data indicate that it is primarily food availability, and not changes in winter temperatures and hunting pressure, that determines where the geese stay in winter,» says Kevin K. Clausen.
Harsh winters meant limited food availability for the birds, and the population crashed several times.
The mild winter weather, the availability of protected waters and nearby farmlands which provide habitat and an abundant food supply all contribute to the year round abundance of bird watching opportunities in the Comox Valley.
The effects on health statistics, can also be from other mechanisms say from volcanics where both extremal temps can prevail ie hot summers and cold winters such as laki where the airborne pollution was also a significant factor in both decreasing the availability of food (PAR) and respiratory ailments.
The model suggests that there might have been a switch in the relative importance of these two effects in recent years, with spring food availability becoming a more important determinant than winter temperature of population size.