Zalophus californianus Felis domesticus Dinofilariasis.

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Presentation transcript:

Zalophus californianus

Felis domesticus

Dinofilariasis

BIOTIC RELATIONSHIPS

BIOTIC FACTORS Factors pertaining to or caused by living organisms EX: Amt. of methane gas produced by cow emissions

COMMUNITIES DEF: Several different species living and interacting in the same habitat Note: Focus is only on the biotic relationships (NOT the abiotic factors)

PREDATION Organism consumes another organism to satisfy caloric or nutritional needs.

COMPETITION Organisms require similar biotic or abiotic factors for their survival, causing their populations to fluctuate in response to these shared demands.

INTERSPECIFIC COMPETITION Competition for resources (i.e. food, space, water) that exists between populations of different species

INTRASPECIFIC COMPETITION Competition between members of the same species

INTRA- v. INTER- WHY IS INTRASPECIFIC COMPETITION GENERALLY MORE INTENSE THAN INTERSPECIFIC COMPETITION?

COMPETETIVE EXCLUSION PRINCIPLE When two organisms or populations enter into competition (inter- or intraspecific), attempting to occupy the same niche, only one of the populations will survive and occupy that niche.

SYMBIOSIS Literally translates to ‘shared life’

PARASITISM Parasite benefits from relationship with host while host is negatively impacted

Explain… How does a parasitic relationship differ from a predatory relationship? In both, one organism is negatively impacted…

COMMENSALISM One organism benefits from the relationship while the second organism is not affected positively or negatively

MUTUALISM Both organisms benefit from the relationship. Without each other, neither would survive.

Pfisteria piscicides

Which Biotic Relationship?