Losing lemurs: Declining populations and land cover changes over space and time.

Forest loss and degradation due to land cover changes imperil biodiversity worldwide. Subtropical and tropical ecosystems experience high deforestation rates, negatively affecting species like primates. Madagascar's endemic lemurs face exceptionally high risks of population declines and extirpation.

Seasonal differences in extinction and colonization drive occupancy dynamics of an imperilled amphibian.

A detailed understanding of the population dynamics of many amphibian species is lacking despite concerns about declining amphibian biodiversity and abundance. This paper explores temporal patterns of occupancy and underlying extinction and colonization dynamics in a regionally imperiled amphibian species, the Northern leopard frog (Lithobates pipiens) in Alberta. Our study contributes to elucidating regional occupancy dynamics at northern latitudes, where climate extremes likely have a profound effect on seasonal occupancy.

Familial disability patterns in individuals with chronic work-related spine injury/illness.

Study Design: A case control study of familial disability patterns and other potential risk factors identified in a group of individuals with work-related spine injury/illness.

Objectives: The objective of the present study is to provide information on the relationship between a disabled family member and work-related spine injuries or illnesses leading to disability among another family member.

Summary Of Background Data: Extensive studies have been conducted to identify the medical and nonmedical factors associated with prolonged disability after work-related spine injury/illness.