Glossary of AP BIO Chapter 50

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a major source of food for the benthos (dead organic matter)
The study of the past and present distribution of individual species
those regions that lie between 23.5 N Lat. and 23.5 S. Lat. (more biodiversity)
The uppermost layer of vegetation in a terrestrial biome
oxegenated water from the surface of lakes to teh bottom and nutrient rich water from the bottom to the surface
Littoral zone
The shallow, well lit waters close to shore
an area covered with water that supports aquatic plants
Landscape ecology
array of ecosystems adn how they are arranged in a geographic region
Benthic zone
The bottom of all aquatic biomes
Ecological time
Minutes, months, years
a permanently frozen stratum
Several different ecosystems linked by exchanges of energy, materials, and organisms
Neritic zone
the shallow regions over teh continental shelves
the distribution of individuals within geographic population boundaries
Oceanic pelagic zone
the ocean water lying far from shore constnatly mixed by ocean currents
Evolutionary time
decades, centuries, millenia and longer
Community ecology
The whole array of interacting species in a community
all the species that inhabit a specific area
Oceanic zone
past continental plates reaching very great depths
Limnetic zone
the well lit open surface waters farther from shore
the scientific study of the interactions between organisms and their environments
Intertidal zone
The zone where land meets water
Deep-sea hydrothermal vents
undersea volcanoes
Abiotic components
Nonliving chemical and physical factors
Biotic components
All teh organisms that are part of any individual environment
Mesotrophic lakes
lakes between the extremes of oligotrophic and eutrophic; they have a moderate amount of nutrients and phytoplankton productivity
Ecosystem ecology
Energy flow and the cycling of chemicals among the various biotic and abiotic components
Aphotic zone
The part of the ocean beneath the photic zone, where light does not penetrate sufficiently for photosynthesis to occur
climate varying on a very small scale (i.e. under a rock)
The communities of organisms occupying the benthic zone
Abyssal zone
Very deep benthic communities
Coral reefs
areas dominated by teh structure of coral itself formed by a diverse gruop of cnidarians that secrete hard external skeletons made of calcium carbonate
The global ecosystem--the sum of all the planet's ecosystems
Oligotrophic lakes
lakes that are deep and nutrient poor and the phytoplankton in the limnetic zone are relatively sparse and not very productive
Organismal ecology
morphological, physiological, and behavioral ways in which individual organisms meet the challenges posed by their biotic and abiotic evironments
population ecology
factors that affect how many individuals of a particular species live in the same area
profundal zone
the deep apothic region
Pelagic zone
open water of any depth
a group of individuals of the same species livign in a particular geographic area
precautionary principle
abstaining from making decisions until all teh answers are known
Photic zone
the narrow top slic of the ocean where light permeates sufficiently for photosynthesis to occur
The Tens Rule
The statistical prediction that an average of one out of ten introduced species become estabilshed, and one out of ten established species become common enough to become pests
Eutrophic lakes
shallow lakes and teh nutrient content of their water is high
All teh abiotic factors in addition to teh entire community of species
narrow stratum of rapid temperature change

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