Bird population changes for the years 1977–78

Changes in a Prairie Bird Population From 1940 to 1989

Descriptive Study of Population Changes in Hamedan Province During Five Years Period 1390-1395

Population changes have undoubtedly impact on policymaking for governmental and private organizations. According to census 1395, North Khorasan province and Hamedan province have experienced a negative population growth rate. Hamedan province with population growth rate -0.23% annually has the lowest rate among all provinces in Iran. Population growth as consequences of several components is c...

The establishment of an urban bird population.

1. Despite the accelerating global spread of urbanized habitats and its associated implications for wildlife and humans, surprisingly little is known about the biology of urban ecosystems. 2. Using data from a 60-year study period, this paper provides a detailed description of how the northern goshawk Accipiter gentilis L.--generally considered a shy forest species--colonized the city of Hambur...

Changes in Bird Communities in Boreal Mixedwood Forest: Harvest and Wildfire Effects over 30 Years

A current paradigm in conservation biology is that forest harvest practices that better approximate natural disturbance processes are more likely to conserve biodiversity. We contrasted bird communities in three replicate stands in each of 1, 13–15, and 22–28 yr old forests following wildfire and harvest in north-central Alberta, Canada. Stands were chosen from old (.120 yr) boreal mixedwood fo...

Ten years of fighting bird flu.

News Ten years of fighting bird flu This year marks a decade since the first human outbreak of H5N1 avian influenza in Hong Kong. Since then, US $1.9 billion has been pledged to fight avian influenza and a global effort is under way to prevent and be prepared for a pandemic. In May 1997 a three-year-old boy died of respiratory failure in a Hong Kong hospital. The cause was given as viral pneumo...