INTR 01146 Lecture 3: Evolution_Environment
13 Feb 2017
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Document Summary
Resources, topography, climate, biomes (large ecological areas on the earth"s. Understanding of human impact on the environment (late 1800s/early 1900s) 4 main human cultural developments: scavengers (circa 3 mya, hunter-gathers (circa 1. 5 my, farming (circa 10,000 yrs, industrialization (circa 1800) Definitions of hominids: unilateral mobility, no base camps, communication - sign language, tools ?, opportunistic. Culture transition and accumulation - symbolic language. Increased food supply -> decrease space -> increase population -> increase culturalization -> increase environmental impact. For some, agriculture is the main environmental impact humans have made. Impacts: soil erosion/salination, eradication of native plants loss of biodiversity loss of food varieties, deforestation. Decreased space -> increase and dense populations -> increase resource utilization - > increase production -> exponential increase of environmental impact. 2 main concepts: energy flow and nutrient. Food webs (cid:498)who is eating whom(cid:499) A part of nature, not apart from nature.
