Pop dynamics handout 2

Pop dynamics handout 2 - Population Dynamics handout 2 I...

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

View Full Document Right Arrow Icon
Population Dynamics handout 2 I. Abundance is the density of individuals or total population size II. Spacing patterns reflect resource distribution and interactions A. Clumped distribution B. Uniform distribution C. Random distribution III. Populations are heterogeneous A. Age structure can be represented in pyramids 1. A population growing rapidly will have many youngsters and will have a broad-based pyramid 2. A population growing slowly will have a flat-sided ‘pyramid’ 3. A population that is decreasing because of a low birth rate will have a pinched bottom IV. Survival and mortality are distributed in schedules A. Mortality and survival rates are probabilities of dying or living per unit time B. These probabilities can vary with age: they have schedules C. Survivorship 1. Survivorship at age x (l x ) is the probability of surviving until age x = 1 – M x COHORT TABLE Age (years) # alive at start of year Proportion alive at start of year Number of deaths during year Age specific death
Background image of page 1

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

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

{[ snackBarMessage ]}

Page1 / 2

Pop dynamics handout 2 - Population Dynamics handout 2 I...

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