the scientific study of the interactions betweenorganisms and the environment.
the long-term, prevailing weather conditions in a given area.
patterns n the global, regional and landscape level.
very fine, localized patterns such as those encountered by the community of organismsthat live in teh microhabitat beneath a follen log.
nonliving factors, the chiemical and physical attributes that influence the distribution and abundace of organisms.
living factors, similarly influence the distribution and anbundace of life on Earth.
major life zomes characterized by vegetation typeor by the physical environment.
a plot of the annual mean temperature and precipitaion oin a particular region.
the area of intergradation.
the low-tree layer,the shrub understory, the ground layer of herbaceous plants, the forest floor and the root layer.
an event such as a storm,fire ro human activityu that changes a community, removing organisms from it and altering resource availability.
A narrow stratum of rapid temperature change in the ocean and in many temperate-zone lakes
the mixing of waters as a result of changing water-temperature profiles in a lake
the movement of individuals away from their area of origin or from centers of high population density
of or relating to the region of the sea over the continental shelf which is less than 200 meters deep
the wide part of a river where it nears the sea
the region of the shore of a lake or sea or ocean
nutrient-poor and generally oxygen rich
a vast, level, treeless plain in the arctic regions. The ground beneath the surface of the tundras is frozen even in summeril
collection of all the organisms that live in a particular place, together with their nonliving environment
(ecology) a group of interdependent organisms inhabiting the same region and interacting with each other
a group of individuals of the same species living in an area.
regions between 23.5° N latitude and 23.5° S latitude; warmest temperature zones on Earth
precipitation such as rain, sleet, hail, and snow that contains a high amount of acid
an organism that makes its own food
organisms that cannot make their own food and must feed on other organisms for energy and nutrients
any animal that feeds on flesh
any animal that feeds chiefly on grass and other plants
an animal that feeds on both animal and vegetable substances
the diversity of plant and animal life in a particular habitat (or in the world as a whole)
a major biotic community characterized by the dominant forms of plant life and the prevailing climate
largest number of individuals of a population that a environment can support
The process of stripping the land of its trees.
coming into existence
first species to populate an area during primary succession
succession that occurs on surfaces where no soil exists
Organism that feeds only on primary consumers. Compare detritivore, omnivore, primary consumer.
a scavenger, such as an earthworm, that feeds on dead plant and animal matter
an organism that makes its own food
An herbivore; an organism in the trophic level of an ecosystem that eats plants or algae
step in the movement of energy through an ecosystem; an organism's feeding status in an ecosystem.
(ecology) a community of organisms where there are several interrelated food chains
(ecology) a community of organisms where each member is eaten in turn by another member
the technology of preparing recombinant DNA in vitro by cutting up DNA molecules and splicing together fragments from more than one organism
practice of classifying plants and animals according to their presumed natural relationships
a classification grouping that contains similar, closely related organisms
one of seven biological categories: Monera or Protoctista or Plantae or Fungi or Animalia
the total mass of living matter in a given unit area
The process by which a new species evolves from a prior species, the most basic process in macroevolution.
the relation between two different species of organisms that are interdependent