BIO120H1 Lecture Notes - Lecture 13: Convergence Zone, Southern Ocean, 30Th Parallel North

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: James Thomson

Document Summary

Mou(cid:374)tai(cid:374) phe(cid:374)a(cid:272)o(cid:373)(cid:455)s (cid:894)(cid:271)le(cid:374)der (cid:373)ouse(cid:895); (cid:272)o(cid:374)sider tho(cid:373)so(cid:374)"s (cid:373)ouse a(cid:374)d (cid:271)le(cid:374)der de(cid:373)o. Theodosius dobzhansky: (cid:862)nothi(cid:374)g i(cid:374) (cid:271)iolog(cid:455) (cid:373)akes se(cid:374)se e(cid:454)(cid:272)ept i(cid:374) the light of e(cid:448)olutio(cid:374)(cid:863) Thomson belie(cid:448)es (cid:862)(cid:374)othi(cid:374)g i(cid:374) e(cid:448)olutio(cid:374) (cid:373)akes se(cid:374)se e(cid:454)(cid:272)ept i(cid:374) the light of e(cid:272)olog(cid:455)(cid:863) Global regional habitat microhabitat smaller microhabitat. Habitats and organisms are patchy at all scales (different colours, variations) why? (recurring theme throughout lectures) Resources are exhaustible: nutrients (n2, k), space, etc. Conditions are not exhaustible (experienced the same way): temperature, ph, salinity, etc. Conditions vary across space and time; we envision gradients of conditions (low intensity vs. high intensity) certain levels; at certain portions of a gradient. Species have ranges of tolerance along environmental gradients. Where the orange curve is the highest, the organism will be doing the best/greatest. Lethal zones are where circumstances become stressed (dead zone) Extreme example of a lethal zone: the death zone on mount everest o2 [c] is 1/3 that of sea level; george mallory, 1882-1924 romantic digression.