RNR 1001 Chapter : RNR 1001 Sept 17
Document Summary
K-selected species are lost and r-selected species do fine. Reduced biodiversity is also caused by: climate change effects on other systems such as fire, flooding, droughts, invasive species are also important to biodiversity. Invasion by alien species (nutria, fire ant, silver carp, rats, longhorn beetle) they take away much of what nature produces. Documented losses in biodiversity have led to identification of biodiversity hotspots of particular conservation concern (most areas of high biodiversity are in the tropics) As pop increases, they need more resources, so the biodiversity declines. Endemic: peculiar to a particular locality or region, evolved there and is found nowhere else. Habitat changes and loss of biodiversity can alter ecosystem processes and the services they produce. Photosynthesis, carbon sequestration, greatest in tropical rainforest and wetlands. Habitat and biodiversity changes can also affect trophic structure, i. e. , nutrient cycling, energy flow, and organism abundance.
