Lipids as pigments in plants and bird feathers.

Birds acquire the pigments that color their feathers red or yellow by eating plant materials that contain carotenoid pigments, such as canthaxanthin and zeaxanthin.

The differences in pigmentation between male and female birds are the result of differences in intestinal uptake and processing of carotenoids.

TLS Online TPP Program

#Id: 8665

#Unit 10. Ecological Principles

Lack of environmental constraints hypothesis suggests preadaptation of some invaders to existing environmental conditions.

With few limitations to many abiotic environments, these invaders can grow quickly and outcompete native species

TLS Online TPP Program

#Id: 9104

#Unit 10. Ecological Principles

An interaction in which one organism, the predator, eats all or part of the body of another organism, the prey.

TLS Online TPP Program

#Id: 9105

#Unit 10. Ecological Principles

Introduced species A species that is introduced to a region of the world where it has not historically existed. Also known as Exotic species or Non-native species

TLS Online TPP Program

#Id: 9106

#Unit 10. Ecological Principles

Invasive species An introduced species that spreads rapidly and has negative effects on other species, human recreation, or human economies. 

TLS Online TPP Program

#Id: 9107

#Unit 10. Ecological Principles

Two levels of predators often exist in ecological communities:

Mesopredators Relatively small carnivores that consume herbivores. 

Top predators Predators that typically consume both herbivores and mesopredators. 

TLS Online TPP Program

#Id: 9108

#Unit 10. Ecological Principles

Antipredator Adaptations