Conbio 2 Flashcards
(14 cards)
Two processes of habitat loss
Habitat alteration
Habitat loss
Habitat loss
Most impacts have been bad for animals.
Habitat degration
Roads fences and buildings.
2% of the world. But effects 20%
Ways of degration
Soil erosion
Suppressed fire
Water use
Dams
Process of fragmentation
Dissection
Perforation
Fragmentation
Attrition
Over exploitation
Worse today than ever. Especially for aquatic species.
Types of exploitation
Commercial exploitation Subsistence exploitation Recreational exploitation Incidental exploitation Indirect exploitation
Who started global warming
Margaret Thatcher who was the prime minister in the uk from 1979-1990
Global warming in last 20 years
Temp has not changed in 18 years so it’s due to natural causes like wind patterns.
Exotic species
Any species living outside its native range without human interference. Most exotic species are NOT invasive.
How do invasive species get introduces
Trade
Military
Recreation
Tens rule
About 1-10 species escape to the wild
Only 1-10 of those become established
Only 1-10 of those become invasive
What is the mid evil warm period
It was a time long ago that was warmer than it is now. They found high carbon levels deep in ice burgs.
Intermediate disturbance hypothesis
A moderate level of disturbance = more diversity and more species
