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Chapter 6: wild species and biodiversity - Coggle Diagram
Chapter 6: wild species and biodiversity
Biological wealth
instrumental value
organisms have value just for themselves
Intrinsic value
provide for us
Food and raw materials
Sources for medicine
Recreational
Wild genes, Banking genes, New food plants, Woods, raw materials
Main reasons for species to decline:
Habitat destruction
Conversion
Fragmentation
Simplification
Intrusion of other species:
other species destroy space
parts of ecosystem removed (logs, etc)
ecosystem becomes into smaller ecosystem (separated by road)
Invasive species
Competition (unnatural level)
Organisms not native to area that causes environmental damage
Pollution
Green frog case study
Suburban lakes mainly female frogs or “intersex” frogs
Chemical
Biological
Physical
Sediments, light, noise, thermal
Pathogens, Parasites
Nutrients (Nitrogen), Pesticides (Endocrine Disrupting Compounds- EDCs), Industrial waste (trace metals)
Overexploitation
overharvesting of particular species faster than they can replenish
Accounts for 23% of recent extinctions
decline of the Passenger Pigeon flocks of passenger pigeons were so large they darkened the sky. The last passenger pigeon died in 1914
Endangered Speices
legislation
Lacey act
Endangered species act
Successes
Grey wolf of yellowstone
Birds of prey and DDT
Kirtland's warbler
Currently endangered
Pine Barrens Tree Frog
Red-cockaded woodpecker
Devils hole pupfish, etc.