Handout_4_Population Ecology

Handout_4_Population Ecology - Study Guide # 4 J.W. Via...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Study Guide # 4 J.W. Via General Biology 1006 Population Ecology I. Population Characteristics 1) Birth Rates 2) Death Rates 3) Immigration (coming into an area) 4) Emigration (leaving an area) 5) Populations evolve (Change with time). Know the following formula : P = BR + IR - DR –ER Where P is equal to the population size). Density = number of individual per unit of area Dispersion = distribution patterns of individuals within a population. (See text) 1) Random = individuals distributed by chance, rarely found because it implies uniformity of the habitat. 2) Clumped = Found in such social species as Baboons, humans. This results because a) environment is rarely uniform b) reproduction of social species is favored for clumped populations. c) Other behavioral traits are favored by clumping (predator avoidance). 3) Even = Found in territorial animals within a uniform habitat. II. How fast do populations reproduce? r = rate of population growth if r > 0, the population is growing; if r < 0, the population is declining , if r = 0, then the population growth is stable (ZPG = Zero Population Growth). r o = Intrinsic Rate of Increase of a Population = the maximum reproductive rate for any particular species. This is usually measured at the exponential phase of population growth. Another name for r o = Biotic Potential Logistic Growth
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Handout_4_Population Ecology - Study Guide # 4 J.W. Via...

This preview shows document pages 1 - 2. Sign up to view the full document.

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