BLG 144 Chapter Notes - Chapter 50: Northern Hemisphere, Photic Zone, Permafrost

• School: Ryerson University
• Department: Biology
• Course: BLG 144
• Professor: Maria Arts

Document Summary

E(cid:272)olog(cid:455)"s goal is to e(cid:454)plai(cid:374) the distri(cid:271)utio(cid:374) a(cid:374)d a(cid:271)u(cid:374)da(cid:374)(cid:272)e of orga(cid:374)is(cid:373)s. it is the (cid:271)ra(cid:374)(cid:272)h of (cid:271)iolog(cid:455) that pro(cid:448)ides a scientific foundation for conservation efforts. Physical structure particularly water depth is the primary factor that limits the distribution and abundance of aquatic species. Climate varies with latitude, elevation, and other factors such as proximity to oceans and mountains. A spe(cid:272)ies" distri(cid:271)utio(cid:374) is (cid:272)o(cid:374)strai(cid:374)ed (cid:271)(cid:455) histori(cid:272)al a(cid:374)d (cid:271)ioti(cid:272) fa(cid:272)tors, as (cid:449)ell as (cid:271)(cid:455) a(cid:271)ioti(cid:272) fa(cid:272)tors su(cid:272)h as ph(cid:455)sical structure and climate. Population a group of individuals that lives in the same area at the same time. When biologists study population ecology, they focus on how the numbers of individuals in a population change over time. Community consists of how species interact with each other within a particular area. Community ecologists ask questions about the nature of the interactions between species and the consequences of those interactions. Ecosystem all organisms in a particular region along with nonliving components.