1 / 23

Autotroph

Autotroph. Heterotroph. Food Web. Energy Flow. Energy Pyramids:. Habitats, Niches, and Community Interactions. 4.2: Pg. 90-93. Biotic and Abiotic Factors. Ecosystems are influenced by a combination of biological and physical factors Biotic Factors : the biological influences on organisms

kapono
Télécharger la présentation

Autotroph

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Autotroph Heterotroph

  2. Food Web

  3. Energy Flow

  4. Energy Pyramids:

  5. Habitats, Niches, and Community Interactions 4.2: Pg. 90-93

  6. Biotic and Abiotic Factors • Ecosystems are influenced by a combination of biological and physical factors • Biotic Factors: the biological influences on organisms • Abiotic Factors: Physical, or nonliving, factors • i.e. temp, precipitation, humidity, wind, nutrient availability, soil, sunlight, etc.

  7. Habitats and Niches • Habitat: the area where an organism lives. Includes both the biotic & abiotic factors • Niche: the full range of physical & biological conditions in which an organism lives & the way in which the organism uses those conditions

  8. Niche includes… • Place in the food web • Range of temp. organism needs to survive • Type of food organism eats • How it obtains food • Who uses the organism for food • Physical conditions required to survive • When & how organism reproduces

  9. Competitive Exclusion Principle • No two species can share a niche in the same habitat!!...example is the Warblers…

  10. Community Interactions • Community interactions, such as competition, predation, and various forms of symbiosis can powerfully affect an ecosystem.

  11. Competition • Competition: occurs when organisms of the same or different species attempt to use a resource at the same place and time. Trees in competition for light

  12. Predation • Predation: one organism captures and feeds on another Lynx and Hare

  13. Symbiosis • Symbiosis: Any relationship in which two species live closely together • Mutualism: both species benefit Clownfish and sea anemone Hummingbird and Flower

  14. Commensalism: one species benefits, other neither harmed nor helped Barnacles on a whale

  15. Parasitism: one organism lives in or in another & harms it A flea or tick feeds on the blood of its host and may also carry disease-causing microorganisms Mistletoe in a tree

  16. Characteristics of Populations5.1 pg. 119-122

  17. Characteristics of Populations are: • Geographic distribution (area inhabited by population) • Density • Growth rate • Age structure

  18. Factors that affect population size are: • Number of births • Number of deaths • Number of individuals that enter or leave population • Immigration – move in • Emigration – move out

  19. If a population has abundant space and food and is protected from predators & disease, then organisms will multiply and the population will increase.

  20. Exponential growth occurs when the individuals of a population reproduce at a constant rate. J-shaped Curve – Exponential growth Occurs under ideal conditions with unlimited resources (Has not reached its carrying capacity)

  21. S-shaped curve – Logistic Growth Populations are limited by space, food, etc. Carrying capacity – largest number of individuals that a given environment can support

More Related