E6 - Factors Affecting Diversity

This is when humans alter a habitat so much that native species can no longer survive there EX: to collect bottom-dwelling fish can destroy coral reefs

fragmentation of habitats

The habitat is now a patchwork of different smaller habitats Look at view of farmland which used to be deciduous forest in Canada!

When we deplete or use a resource faster that it can be replaced Common example is overfishing EX: Cod overfishing in Atlantic Canada Overuse of Water EX: Drying up of the Aral Sea

Is any substance added to the environment that produces a condition that is harmful to organisms Solid waste: Cannot be recycled, which is isolated from contaminated ecosystems in landfills

One of the one of most concern is carbon dioxide gas which is key in climate change

Very easy to pollute. Can enter water from a specific source or indirectly through rain or snow

bioaccumulate and biomagnify

Emissions from human activity can combine with water in the atmosphere to make acids which makes acid rain

Damage the waxy protective coating on leaves Burns the skin of earthworms when in the soil Can effect the way plants absorb nutrients

Increased by international travel and trade And invasive species is a non-native species that causes harm to the ecosystem in which it has been introduced Tend to outcompete the native species, have no competitor or can reproduce faster than native species

Global warming: The increase of the earth’s annual temperature Climate change: significant long term change in expected climate patterns

Range Shifts Ex: Dengue fever carrying mosquitoes have returned to Key West Florida in 2009 This disease was absent of more than 75 years! The return is blamed on warming-induced insect migration.