27 terms

B6 - Biodiversity

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biodiversity
the variety of living organisms present in an area.
deforestation
the permanent removal of large areas of forest
eutrophication
when an increase of one plant causes another plant/s to die
conservation
protecting a natural environment to ensure that habitats are not lost
captive breading
breading animals in human-controlled environments such as zoos or aquariums
conservation agreement
agreements made to conserve biodiversity, as local and international co-operation is required to preserve habitats and individual species
Ecotourism
when money from tourists is used to maintain biodiversity enabling people to visit without damaging the habitat
Ecosystem
all of the living organisms and physical conditions present in one area
Community
all the living organisms in one area
Population
the number of organisms of one species living in one area
Prey
an animal that is hunted and killed by another for food
Biotic
relating to or resulting from living organisms
Abiotic
physical rather than biological; not derived from living organisms
Mutualism
a relationship in which both organisms benefit
Parasitism
a relationship in which the parasite gains and the host in harmed
Predation
relationship between a predator and prey, predator depends on the prey - normally for food
Competition
Two or more organisms contesting for a resource
primary consumer
an animal on the second trophic level who feeds on producers
secondary consumer
an animal on the third trophic level, who predate on the primary consumers
herbivore
an animal that only feeds on plants
carnivore
an animal that only feeds on other animals
biomass
all the material an organism is made from
sampling
making observations of a smaller area which would be representative of a larger area
abundance
the size of the population in an area ( the number of plants/animals of a particular species)
distribution
where organisms are found in the habitat
how to estimate total population from a sample
total population in area = number of organisms per m2 x total area of habitat
how to calculate the efficiency of biomass transfer
efficiency % =biomass available after the transfer/biomass available before the transfer x100