BIO205H5 Lecture Notes - Lecture 14: Santa Catalina Mountains, Ecotone, Medieval Commune
Document Summary
Diversity of a community: incorporates both the number and rela,ve abundance of species. Species diversity: a ected by resources, habitat diversity, keystone species, and disturbances. Communi,es: respond to disturbances with resistance, resilience, or switching among alterna,ve stable states. Community: an assemblage of species living together in an area. Di erent zones: re ect species" di erent tolerance ranges for various environmental condi,ons. Tolerance and compe,,on species are found where they can torleate the abiotic conditions. Communi,es are oken categorized by the dominant organisms or by physical condi,ons that a ect the distribu,on of species. Beech-maple forest communi,es of ontario: sagebrush communi,es of wyoming: Aqua,c systems are oken categorized by physical characteris,cs or by dominant organisms. Ecotone: a boundary created by sharp changes in environmental condi,ons over a rela,vely short distance. Oken accompanied by a major change in the composi,on of species. Some species move between adjacent communi,es most species live in one of the communi,es and spread into the ecotone.
