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Chapter 34 2


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scientific study of the interactions among organisms and between organisms and there enviroment.
Biotic Factor
Any living part of an enviroment
Abiotic Factor
Nonliving physical or chemical condition in an enviroment.
group of individual of the same species living in a paticular area at the same time.
All the orginisms living in the area.
Community of living things plus the nonliving features of the enviroment that support them.
All the parts of the planet that are inhabited by living things sum of all earths ecosystems.
An orginisms specific enviroment with characteristics abiotic and biotic features
Regions beetween 23.5 N latitude and 23.5 S latitude warmest tempature zones on earth.
Polar Zones
The regions north of the artic circle (66.5 N)and south of the antartic circle (66.5 S)that recieve the smallest amount of direct sunlight year-around.
Temperate Zones
Latitude between the tropics and polar regions in each hemisphere.
Riverlike flow pattern within a body of water
Climate in a specific are that varies from the surrounding climate region
Major type of terrestrial ecosystem that covers a large region of earth
Tropical rain forest
type of forest near the equater that recives as much as 250 cm of rainfall yearly
Grass land which is scattered trees found in the tropical regions of Africa, Australia, and South America.
Microscopic algae and cyanbacteria that carry out photosynthises
Aphotic zone
Deep areas of a body of water where light levels are to low to support photosynthsis.
Benthic zone
Bottom of an aquatic ecosytem consists of sand and sediment and supports its own community of oraganisms
Area where fresh water from rivers merges with salty ocean water produntive ecosytem
Pelgic zone
Open water above the ocean floor.
Area of shore between the high-tide and low-tide lines
Neritic zone
Area of the ocean that extends from the low-tide line out to the edge of the continetal shelf
Oceanic zone
Vast open ocean from the edge of the contenental shelf outward.
Microscopic animals that swim or drift near the surface of aquatic enviroments
Hydrothermal vent
Openaing in the ocean floor where hot gases and minerals escape from erths interior.
Land area that recives less that 30 centeniters of rain per year.
Temepreate costal biome dominated by dense evergreen shrubs
Temperate grassland
Biome chracterized by deep nutient-rich soil that supports many grass species
Temperate decidious forest
Forest in a region chracterized by trees that drop their leaves annually
Coniferous forest
Forest populated by cone-bearing evergreen trees mostly found in northern latitudes
Biome in the Artic Circle or on high mountain tops chracterized by bitterly cold tempature and high winds
Permenatly frozen sub-soil

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