(par 4.2.2.1) Competition – from Wikipedia

From Wikipedia, the free encyclopedia Sea anemones compete for the territory in tide pools Competition is an interaction between organisms or species in which the fitness of one is lowered by the presence of another. Limited supply of at least one resource (such as food, water, and territory) used by both can be a factor.[1] Competition both within and between species is an important topic in ecology, especially community ecology. Competition is one of many interacting biotic and abiotic factors that affect community structure. Competition among […]
(par 4.2.2.1) Habitat and Adaptation

http://wwf.panda.org/about_our_earth/teacher_resources/webfieldtrips/hab_adaptation/ © WWF / Roger LeGuen Every organism has a unique ecosystem within which it lives. This ecosystem is its natural habitat. This is where the basic needs of the organism to survive are met: food, water, shelter from the weather and place to breed its young. All organisms need to adapt to their habitat […]
(par 4.2.2 ) Direct and Indirect Interactions

http://www.nature.com/scitable/knowledge/library/direct-and-indirect-interactions-15650000 By: Daniel C. Moon (Department of Biology, University of North Florida), Jamie Moon (Department of Biology, University of North Florida) & Amy Keagy (Department of Biology, University of North Florida) © 2010 Nature Education Ecological communities are shaped by a complex array of direct and indirect interactions. These interactions are spatially and temporally dynamic […]