BIO 1130 Lecture Notes - Lecture 3: Fetus, Green Algae, Archean

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Periods cambrian, ordovician, silurian, devonian, carboniferous, permian. Had little effect on the diversification of land plants (plants are resistant to impact) Most of the diversification is still present entering the carboniferous period. Carboniferous = coal bearing (many coal beds formed) Amphibians were dominant land vertebrates (later would evolve into reptiles) Carboniferous plants still growing at this time; pulled co2 from atmosphere into plant material = co2 atmosphere has declined in earth; less gh gases, and lower temp. Influx of organic material into oceans from land due to plants. Bacterial component of marine ecosystem will break this down and oceans become less saturated with oxygen. Diversification of the early amniotes into ancestral groups of mammals, turtles, reptiles. Due to drier land and continental interior, reptiles dominated. Most animals still there, but they look different. Large tree-like structures that aren"t trees since they do not have vascular structures. Carboniferous coal forests club mosses, giant horsetails, tree ferns.