Holt McDougal Biology Chapters 13 & 14 Vocab
Vocabulary for Holt McDougal Biology chapters 13, 14
Terms in this set (38)
A group of organisms so similar to one another that they can breed and produce fertile offspring.
All of the organisms of a species living in the same area.
All of the populations that live in an area.
Community + abiotic factors in an area.
The role and position of an organism in a community.
An organism that receives energy from abiotic sources; an autotroph
An organism that receives energy by eating other organisms; a heterotroph.
Organism that breaks organic matter down into simpler compounds, returning nutrients to an ecosystem Ex: Bacteria
Ecological relationship in which two organisms attempt to obtain the same resource.
nonliving parts of an organism's environment: temperature, moisture, light and soil are examples
portion of Earth that supports life; extends from high in the atmosphere to the bottom of the oceans
A type of symbolic relationships in which one organism benefits and the other organism is not affected.
all the living parts of an organisms environment
scientific study of interactions among organisms and between organisms and their environment
the place where an organism lives out its life
symbiotic relationship in which both species benefit from the relationship (Ex. Acacia tree + ants)
symbiotic relationship in which one organism benefits at the expense of another, usually another species (Ex. Tick + dog)
permanent, close association between two or more organisms of different species (3 types: mutualism, parasitism + commensalism)
organisms that make their own food usually by photosynthesis, some by chemosynthesis
simple model that shows how matter and energy move through an ecosystem Ex: Grass --> Mouse ---> Hawk
model that shows all the possible feeding relationships at each trophic level in a community (All the combined food chains in the community)
organisms that cannot make their own food and must feed on other organisms for energy and nutrients; "other feeder"
feeding step in a food chain (Ex: 1st order heterotroph)
any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms. (Ex- predator or hurricane)
group of ecosystems that have the same climate and dominant communities
the maximum number of organisms of one species; maximum population size, which an environment is able to support indefinitely
limiting factors that are worse with greater population density such as disease, parasites or food availability that affect growth of a population; - (Worse with bigger populations)
density - independent factor
limiting factor such as temperature, storms, floods, drought, or habitat disruption that affects all populations regardless of their population density
population growth pattern where a population grows faster as it increases in size --> J shaped curve graph
variety of life in an area; usually measured as the number of species that live in an area
a species in which the number of individuals falls so low that extinction is possible
the disappearance of a species when the last of its members dies
damage to a habitat by air, water, and land pollution
the separation of wilderness areas from other wilderness areas. (Ex. Building a highway does this)
orderly, natural changes, and species replacements that take place in ecosystem communities over time. (Types: Primary - from bare rock) (Secondary - starting with soil)
an organism that colonizes a new uninhabited area; this species starts an ecological cycle in which many other species become established
succession that begins in an area that previously did not support life - (Ex: After lava eruption)
the process by which one community replaces another community that has been partially destroyed (Ex: After bulldozing)