1 / 11

Characteristics of The Biosphere

Characteristics of The Biosphere. Carrying capacity- largest number of individuals an environment can support and maintain Lag Phase- period of slow growth in a population Exponential Growth Phase- population repeatedly doubles in a specific time

mulan
Download Presentation

Characteristics of The Biosphere

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. Characteristics of The Biosphere

  2. Carrying capacity- largest number of individuals an environment can support and maintain Lag Phase- period of slow growth in a population Exponential Growth Phase- population repeatedly doubles in a specific time Stabilization Phase- deaths are equal to births, no growth Population size: the number of individuals in population Population density- the number of individuals in a given area Biotic potential- number of individuals that each female in a population can produce under the best possible conditions (food, water shelter etc.)

  3. J curve • Shows a population that is still in the exponential growth phase

  4. S- Curve • Population grows slowly at first, then enters rapid growth and finally stabilizes • At that point the carrying capacity of that environment has been achieved

  5. Saw-tooth or Predator/Prey curve • Predation- the feeding of one organism on another • The population of one species directly affects the population of the other species

  6. Density-dependent: Any factor that directly limits the size of the population Examples: Food, water, shelter, space Density-independent: factors that affect all populations in the same way regardless of the population density Example: Climate, fire, flood Limiting Factors

  7. Population Equations • Birth Rate: births/total pop. x 100 • Death Rate: deaths/total pop. X 100 • Population Change: (births + immigrants) – (deaths + emmigrants) = • Growth Rate: pop. change/total pop. x100

  8. The Symbiosis

  9. Mutualism • A relationship in which two species interact closely in a way that benefits both species • Ex: butterfly and flower • Butterfly gets food from flower • Flower disperses pollen via the butterfly

  10. Commensalism • Relationship in which one organism benefits from the interaction, and the other is neither helped nor harmed • Ex: barnacles and whales • Barnacles move from place to place via whale • Whale not affected

  11. Parasitism • Relationship between two organisms in which one species (parasite) harms the other species (host) • Ex: ticks and mammals • Ticks live under the skin of mammals and suck blood and nutrients from mammal -tick will not kill its host because it needs it as a resource -Mammal is severely weakened and harmed but does not die

More Related