Biology 2483A Lecture Notes - Lecture 22: Baiji, Gorongosa National Park, Grand Banks Of Newfoundland

• School: Western University
• Department: Biology
• Course: Biology 2483A
• Professor: Hugh Henry

Document Summary

Unit 6: ecosystems lesson 22: conservation biology (nov. 28th 2017) Biodiversity is declining globally: estimates of current extinction rates rely on, the species area relationship, changes in the threat status of species (e. g. , shift from endangered to critically endangered, rates of population decline or range contraction of common species. Primary threats to biodiversity include habitat loss, invasive species, overexploitation, pollution, disease, and climate change: over 1,197 mammal species are currently threatened with extinction, habitat loss biggest one for terrestrial mammals. If the forests disappear they cannot lay eggs: american marten, the fisher. Invasive species: huge network of logging roads that bring in invasive species. Invasive species are non-native, introduced species that sustain growing populations and have large effects on communities: of particular concern are invasive species that impact native endangered species. Invasive zebra mussels have had negative impacts on the freshwater mussels in the order unionoida.