chapter 43
three levels of biodiversity
genetic, species, ecosystem
genetic diversity comprimises ___________
genetic variation
endangered
wildlife species facing imminent extirpation or extinction
threatened
wildlife species that is likely to become endangered if nothing is done to reverse the factors leading to its destruction or extinction
exirpated
wildlife species that no longer exists in the wild in canada but exists elsewhere
three main threats to biodiversity
habitat destruction, introduced species, overexploitation
the greatest threat to biodiversity
habitat loss
two main approaches to conservation
the small population approach, the declining population approach
minimum viable population size
the minimum population size at which a species can survive
effective population size
the number of individuals in a population who contribute offspring to the next generation
declining population approach
focuses on threatened and endangered populations that show a downward trend regardless of population size
movement corridor
narrow strip of quality habitat connecting otherwise isolated patches
biodiversity hot spot
a relatively small area with a great concentration of endemic species and many endangered and threatened species
nature reserves are
biodiversity islands
rachel carson
silent spring book addresses biomagnification
ocean acidification
CO2 dissolves in water creating carbonic acid increasing the acidity of the ocean
causes of rising sea levels due to climate change
expansion of water in higher temps, melting of ice
3 principles of MSC sustainable fisheries
no overfishing, maintenance, respect local laws