key terms Flashcards
about ecosystems e.g.biodiversity, niches, inter/intraspecific competition
biodiversity is
the variety of species present in an ecosystem
an ecosystem consists of
all the organisms(community) living in a particular place(habitat) and the non-living components
a population is
total no. of organisms of the same species in a particular habitat
interactions of species with other species in a community include
competition and predation
producers are
green plants that produce their own food by photosynthesis
consumers are
organisms that obtain energy by eating other organisms
herbivores eat
plants
carnivores eat
animals only
omnivores eat
animals and plants
predators are
organisms that hunt and kill prey organisms
prey are
organisms that are hunted by predator organisms
a niche is
the role an organism plays within its community
a niche is related to
the resources an organism requires in its ecosystem, eg. light/nutrient availability and its interactions with other organisms in the community
a niche involves
competition and predation and the abiotic factors it can tolerate
a food chain diagram represents
how energy flows from 1 organism to another during feeding
food chains are linked together as
food webs
competition in ecosystems occur when
resources are in short supply and organisms struggle for the same resources
interspecific competition occurs among
individuals of different species for 1 or a few resources they require
intraspecific competition occurs among
individuals of the same species for all resources they require
………… competition is more intense than …………competition
intraspecific competition is more intense than interspecific competition
a species is
a group of organisms that can interbreed to produce fertile offspring
a habitat is
the place an organism lives
