ECS 111 Lecture Notes - Lecture 2: Demographic Transition, Antibiotics, Exponential Growth

• School: University of Miami
• Department: Ecosystem Science and Policy
• Course: ECS 111
• Professor: Sealey Kathleen

Document Summary

Population is increasing faster than people are dying. Caribbean region: 36 political jurisdictions, haiti. Government lacks capacity to create/execute a stable system. Over 1 mill were displaced by hurricane. Reasons for patterns of growth: biotic potential exceeds environmental resistance, 60 mill are added to earth each year, 9000 every hour. Doubling time- how many years its going to take for population to double. Explosion: causes of diseases recognized, improvement in nutrition, antibiotics, medicine. Demographic transitions: stage 1- expanding, stage 2- expanding, stage 3- stationary, stage 4- contracting. Demographic transition- typical pattern of falling death rates and birth rates due to new tech. and improvements in medicine- can lead to stable population size. Exponential growth curve dn/dt= rn: r=rate of natural increase, t=time. 1. 275 billion people who earn less than . 25 a day. 2/3 of them live in five populous middle income countries: india, china, Ipat equation: describes the multiplicative contribution of (p, affluence (a, technology (t, environmental impact (i, i=pat.