Approximate number of California condors in the wild today
Long term solutions to the problem lead toxicosis in condors
get rid of lead shot, acquire more hunting-free zones
Why specialized species including polar bears are particularly at risk from climate change
narrow nitch. Cascade effect of warming in arctic
How being at the top of a food chain results in an animal having to deal with the summation of effects on other trophic orders (polar bear talk)
Why climate change increases the period of fasting in female polar bears
Pregnant females fast for longer. Can’t den on fast ice if it’s melting
How climate change alters the food web so that polar bears may have less to eat.
Decreased sea ice – water interface
Preferred environment of algae
Algae main food of Atlantic Cod
Atlantic Cod Prey for many species
Seals prey on cod
Seals are main prey of polar bears
How climate change alters the access to prey that are there when the bears are hunting on the ice
Seals have more air holes
Reason why GPS tracking does not always work
Substrate in the way of satellite reception
Why studies of the Hudson Bay coastal polar bears may be a good predictor of future conditions
Southern most population
Trends in body condition & body fat over time in polar bears
Bears were returning to land in poorer condition Factor in survival – lose between 0.7 and 0.85 kg/day when fasting, fat loss is 93% of mass change Related to ringed seal numbers change in fish populations and change in bear hunting environment
The major causes of deer overpopulation in the US.
Restricted seasons & game laws – Introductions – Tree planting/forested landscaping – Decline in predators – Moderate climates (Global warming
How global warming influences deer population size.
– Moderate climates – Mild winters Increase deer body mass & winter survival population growth
How overpopulated deer aggravate global CO2 burdens
Some major diseases associated with high deer populations.