BISC 121Lg Lecture Notes - Lecture 29: Ocean Current, Zebra Mussel, Rachel Carson
Document Summary
Rachel carson- silent spring: caused the banning of ddt. Ecosystem ecology- energy flow and chemical cycling. Abiotic factors- nonliving chemical and physical components. Temperature and salinity- each organism has a range of tolerance. Annual temperature/rainfall are usually pretty distinct between biomes. Global climate is widely determined by sunlight and planetary movements. Local and seasonal climates affect global climate. Microclimate- climate can vary on a small scale. Long term climate change can have a large effect on the biosphere. Biogeography- study of past and present distributions of individual species. Introduced species: often explode to occupy a new area, (cid:862)afri(cid:272)anized honey(cid:271)ees(cid:863) (cid:894)~2000(cid:895) More aggressive, harder to handle: zebra mussel is highly invasive and costly. Biotic factors affect organism distribution: predator/herbivore experiments show how they affect prey and plants. Marine biomes have ~3% salt concentration and cover ~75% of the earth. Urfa(cid:272)e o(cid:272)ean (cid:272)urrents are affe(cid:272)ted (cid:271)y the wind and the earth"s rotation. Photic zone- receives light and photosynthesis can occur.
