Shared Flashcard Set

Details

Ecology
Ecology Definitions
33
Science
10th Grade
01/24/2006

Additional Science Flashcards

 


 

Cards

Term
Ecosystem
Definition
In an area defined by an ecologist, the set of relationships between populations of species and between those populations and the abiotic (non-living) factors in their environment.
Term
Endangered
Definition
A species that is close to extinction.
Term
Food Cahin
Definition
A step-by-step sequence linking organisms that feed on each other starting with a food source, such as a producer or detritus, and continuing with a sequence of consumers.
Term
Producer
Definition
An autotroph; an oranism that uses photosynthesis or another form of chemical synthesis to make food.
Term
Consumer
Definition
A heterotroph; an organism that must eat producers or other comsumers to survive.
Term
Herbivore
Definition
an animal that eats plants
Term
Carnivore
Definition
an animal that feeds on other animals
Term
omnivore
Definition
an animal that eats both plants and animals
Term
detritus
Definition
waste from plants and animals, including their dead remains
Term
decomposer
Definition
an organism that feeds on detritus, in the process releasing nutrients to the soil and water, where they can be used by oher organisms.
Term
extinct
Definition
a species that no longer exists on Earth
Term
extripated
Definition
a species that no longer exists in one part of a range
Term
threatened
Definition
a species that is likely to become endangered if factors that mke it vulnerable are not reversed
Term
causes of extinction
Definition
1. asteroids hitting erath
2.climate changed or pressure of competition
3.human activites
4.global warming
5.expansion of agriculture
Term
biodiversity
Definition
the number of species in an ecosystem, and the variety within those species.
Term
what are the three values of wolves?
Definition
1.the frontier view
2.the stewardship view
3.the ownership view
Term
what is the frontier view?
Definition
man is more important than animals
Term
what is the stewardship view?
Definition
man is more intelligent, we must take care of all species.
Term
what is the ownership view?
Definition
man does not own the animals, leave them be.
Term
pest
Definition
an organism that people consider harmful or inconvinient in a particular situation, such as weeds and some inscets, fungi and rodents
Term
ecology
Definition
the study of the interaction of living things with each other and with abiotic (non- living) factors in their environment
Term
abiotic
Definition
factor in an ecosystem created by non-living agents
ex) wind direction, temp, sunlight
Term
biotic
Definition
a factor in an ecoystem created by the pressence and roles of other living things
Term
population
Definition
all of the members of a species living in an ecosystem or habitat.
Term
community
Definition
the collection of all the populations of all the species in an ecosystem; all of the organisms in an ecosystem
Term
photosynthesis
Definition
the process by which green plants and some other organismsuse sunlight energy, carbon dioxide, and water to produce carbohydrates (sugars and oxygen)
Term
albedo
Definition
a measurement of the percentage of light that an object reflects; the higher the albedo, the greater the objects ability to reflect sunlight
Term
radiation
Definition
the transfer of energy by means of waves that do not require a medium
Term
trophic level
Definition
a way of catergorizing living things according to how they gain their energy; the first trophic level contains autotrophs, and each higher level contains heterotrophs
Term
autotroph
Definition
an organism that uses energy and raw materials to make its ouwn food, whether from photosynthesis or some other form of chemical synthesis; a producer
Term
primary consumer
Definition
in a food chain or food web, an organism that relies on autotrophs directly for its source of energy; organisms at the second trophic level
Term
secondary consumer
Definition
in a food chain of web, and organism that relies on primary consumers for its principal sourse of energy; organisms at the third trophic level
Term
heteroptroph
Definition
an organism that is incapable of making its won food, and so much feed on other organisms to gain energy
Supporting users have an ad free experience!