Chapter 37 - Communities and Ecosystems

Chapter 37 - Communities and Ecosystems - Communities and...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon
Communities and Ecosystems Chapter 37
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
Community Assemblage populations that live together in a habitat Habitat – type of place where individuals of a species typically live
Background image of page 2
Characteristics of a Community Species diversity: variety of different kinds of organisms Species richness Relative abundance Dominant species
Background image of page 3

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

View Full Document Right Arrow Icon
Characteristics of a Community Response to disturbances Trophic structure: feeding relationships among species
Background image of page 4
Species Interactions Neutral - have no effect on either species Commensalism – helps one species and has no effect on the other Mutualism – helps both species
Background image of page 5

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

View Full Document Right Arrow Icon
Species Interactions Competition – has a negative effect on both species Predation and parasitism – both benefit one species at a cost to another
Background image of page 6
Competition may occur when a shared resource is limited Interspecific - between species Intraspecific - between members of the same species Intraspecific competition is most intense
Background image of page 7

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

View Full Document Right Arrow Icon
Symbiosis Living together for at least some part of the life cycle Commensalism, mutualism, and parasitism are forms of symbiosis
Background image of page 8
Principle of Competitive Exclusion “Two species cannot coexist in a community if their niches are identical” Niche : Species' total use of biotic and abiotic resources
Background image of page 9

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

View Full Document Right Arrow Icon
Possible results of Competition Less competitive species driven to local extinction Resource partitioning may evolve
Background image of page 10
Resource Partitioning LE 37-2a Chthamalus Balanus High tide Chthamalus realized niche Balanus realized niche Low tide Ocean Figure 37.2A
Background image of page 11

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

View Full Document Right Arrow Icon
Resource Partitioning bristly foxtail roots Indian mallow roots smartweed roots
Background image of page 12
Predation leads to diverse adaptations in both predator and prey Predation - interaction between species in which predator kills and eats another prey Adaptations of both tend to be refined through natural selection
Background image of page 13

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

View Full Document Right Arrow Icon
Prey Defenses (Animal) Active defenses – escaping, self-defense Passive defenses hiding alarm calls camouflage and mimicry warning coloration and chemical toxins
Background image of page 14
Spines or thorns and hard to digest plant parts Chemical defenses
Background image of page 15

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

View Full Document Right Arrow Icon
Image of page 16
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 59

Chapter 37 - Communities and Ecosystems - Communities and...

This preview shows document pages 1 - 16. Sign up to view the full document.

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