Book notes - Chapter 1 1. Communities 2. Communities and...

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

View Full Document Right Arrow Icon
Chapter 1 1. Communities Ecological community: the small fraction of the global collection of species that can be found at any particular place Community ecology: will include the study of patterns and processes involving at least two species at a particular location. Population ecology: includes predator-prey interactions and interspecific competition Guild: a collection of species that use similar resources in similar ways Taxocene: a set of taxonomically related species within a community Trophic levels: provide a way to recognize subsets of species within communities that acquire energy in similar ways (primary producers, herbivores, primary carnivores, and decomposers) Food chains/food webs: describe patterns of material and energy flow in communities Ecosystems: one or more communities, together with their abiotic surroundings, ignore details of population dynamics 2. Communities and their members Physically defined communities: assemblages of species found in a particular place or habitat Biomes: basic categories of communities that differ in their physical environments and in the lifestyles of their dominant organisms Taxonomically defined communities: recognized by the presence of one or more conspicuous species that either dominate through biomass or contribute importantly to the physical attributes Statistically defined communities: sets of species whose abundances are significantly correlated over space or time Interactively defined communities: subsets of species in a place or habitat whose interactions significantly influence their abundances 3. Community properties Species richness: a number that characterizes a biological
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.

This note was uploaded on 04/25/2008 for the course BIOL_SCI 349 taught by Professor Zorn-arnold during the Spring '08 term at Northwestern.

Page1 / 3

Book notes - Chapter 1 1. Communities 2. Communities and...

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