Biotic and Abiotic Factors Biotic factors Biological influences on organisms within an ecosystem Ex other species competing for food Abiotic Factors Physical or non living factors that effect the ecosystem ID: 371379
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Slide1
What shapes an Ecosystem?Slide2
Biotic and Abiotic Factors
Biotic factors
Biological influences on organisms within an ecosystem
Ex other species competing for food Abiotic FactorsPhysical or non living factors that effect the ecosystemEx temperatureSlide3
The niche
Niche
Full range of physical and biological conditions in which an organism lives and they was it uses those conditions
A niche includes the type of food the organism eats, how it obtains this food and which other species use the organism as food.It also includes how organism reproduce.Slide4
Community Interactions
Community interaction, such as competition, predation and various forms of symbiosis can powerfully affect an ecosystem
Resource
Any necessity of life such as water and foodCompetitive exclusion principle States that no two species can occupy the same niche in the same habitat at the same timeSlide5
Predations
Predations
An interaction in which one organism captures and feeds another organism.PredatorKills and eats other organismSymbiosisAny relationship in which two species live closely together.Slide6
Mutualism
Both species benefit from the relationship
Commensalism
One member of the association benefits from the situation and the other is neither helped or harmedParasitismOne organism lives on or inside another organism and it harms it.Slide7
Ecological Succession
Ecosystems are constantly changing in response to natural and human disturbances
As an ecosystem changes older inhabitants gradually die out and new organisms move in causing further changes in the community
Ecological successionSeries of predictable changes that occurs in a community over timeSlide8
Primary succession
Succession that occurs on the surfaces where no soil exist
Pioneer species
First species to populate an areaSecondary SuccessionCommunity interactions tend to restore the ecosystem to its original conditionHealthy ecosystems usually recover from natural disturbances because of the way components of the system interactSlide9
Succession in a Marine Ecosystem
1. whale carcass sinks to the bottom of the ocean and attracts decomposers
2. within a year most of the whale’s tissue has been eaten
3. heterotrophic bacteria begin to decompose oils inside the whale bone