TOPIC 10 Flashcards
(21 cards)
define Community
population of all different species of organisms living in a habitat at one time
define Habitat
place where organism lives
Define Ecosystem
life supporting environment including all living organisms which interact together
Define biosphere
all the areas of the surface of the earth where living organisms survive
the major ecosystems of the world are called ____________ .
the major ecosystems of the world are called Biomes
Define succession
process by which communities of organisms colonising an area change overtime
Define Climax Community
Self sustaining community with relatively constant biodiversity and species range. It is the most productive group of organisms that a given environment can support long term.
Term for a climax community that is at least part the result of human intervention.
Plagioclimax
What is a climatic climax community
the only climax community possible in a given climate
difference between secondary and primary succession
in secondary the soil is already existing with its vegetation
Term describing the loss of minerals from the soil as water passes through rapidly
Leaching
Abiotic factor and effect- Light
Plants dependant on light for photosynthesis
Animals are indirectly affected due to distribution of food
seasonal light also affects reproductive patterns of animals and circadiam rhythms therefore determining behaviour
Abiotic factor and effect-Temperature
Reproduction affected by certain range
enzyme controlled reactiong in plants
Abiotic factor and effect- Wind and water currents
wind increases water loss from body and cooling
Habitats and communities destroyed
Abiotic factor and effect- Water availability
water is vital for living animals
sudden increase in populations- e.g. seeds suddenly germinating
Abiotic factors and effect- edaphic
edaphic factors- soil structure and mineral content
define leaching
the loss of minerals from soil as water passes through rapidly
difference between interspecific and intraspecific competition
Interspecific- competition between different species within a community for the same resources
Intraspecific-Competition between members of the same species for a limited resource
Density Independent Factors are those where the effect is the __________ regardless of ___________ size. These factors limit ___________ of individuals and therefore ___________.
Density Independent Factors are those where the effect is the same regardless of population size. These factors limit distribution of individuals and therefore species
Density dependant factors are factors that have an effect based on ___________ size. These limit the ____________ of species.
Density dependant factors are factors that have an effect based on population size. These limit the abundance of species.
