Lecture29_PopBioII - Males Females 80 70 60 50 40 30 20 10...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Population Biology II III. Case studies in population growth, continued Human population growth: projections to 2050 2004 update fertility population ( avg #kids/female) (billions) current ~2.6 high ~2.5 med ~2.0 low ~1.5 Changes in growth rate Punchline: it’s all about • 1965-1970 growth rates peaked, avg %/yr • 1990-1995 average % per year • 2000-2005 average % per year half of this growth is in 6 countries: 95% of growth in developing nations • current estimate is billion
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
IV. Population structure A. Age structure Consider the relative abundance of different aged individuals and importance for growth Interpreting “population pyramids” in humans 1. High survivorship, no growth (fertility constant) Males Females 80 70 60 50 40 30 20 10 0 2. High survivorship, population declining (fertility dropping)
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Males Females 80 70 60 50 40 30 20 10 3. High survivorship, population increasing (fertility increasing) Males Females 80 70 60 50 40 30 20 10 China: 2005 estimate B. Geographic structure in populations Range maps in books Metapopulation = a population of populations e.g. Glanville fritillary Study: find meadows with host plants only have fritillaries 1 larval group in most; but one w/ larvae What are the dynamics of a metapopulation? mark individuals recapture later in summer find in new patch two years later, do census and find Punchlines (take-home messages): 1. Importance of 2. Metapopulations are...
View Full Document

Page1 / 3

Lecture29_PopBioII - Males Females 80 70 60 50 40 30 20 10...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online