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Biology II
Vocab 1
28
Biology
Undergraduate 2
09/12/2015

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Term
ecology
Definition
the study of interactions among living things and their environments
Term
biotic
Definition
a living thing in an ecosystem
Term
abiotic
Definition
any physical or chemical part of an ecosystem that living things NEED to survive!
Term
biome
Definition
A distinct abiotic environment that is found at different places on the planet and is inhabited in each of these locations by ecologically-similar organisms with convergent adaptations.
Term
climate
Definition
the long-term average state of the weather at a given place over a yearly cycle
Term
deciduous tree
Definition
dropped seasonally
Term
soil profile
Definition
a vertical section of soil from the ground surface to the parent rock
Term
topsoil
Definition
The uppermost soil horizon; contains most of the organic matter of soil, but may be depleted of most mineral nutrients by leaching
Term
bedrock
Definition
The soil horizon consisting of the rock that is breaking down to form the soil
Term
coastal
Definition
Fairly shallow, higher dissolved oxygen, nutrient levels.
interface between the land and water
Term
intertidal zone
Definition
The nearshore region of oceans that lies between the level of the high and low tides, so that it is alternately inundated with water and exposed to air
Term
littoral zone
Definition
The nearshore regions of lakes and oceans. In oceans this includes the intertidal zone
-Goes as far as root plants can go
Term
pelagic zone
Definition
The "open water" zone of oceans that lies beyond the continental shelves
Term
photic zone
Definition
The surface zone of lakes or oceans that is penetrated by sunlight
-How far the sunlight can reach
Term
aphotic zone
Definition
The parts of the lakes and oceans below the photic zone, where no sunlight penetrates
Term
benthic zone
Definition
The substrate at the bottom of an occean, lake, stream, or other body of water
-the bottom. From shoreline to other part of lake
Term
limnetic zone
Definition
means lake. Extends from where root plants stop all the way to the deepest part of the lake
-the "open water zone" of freshwater lakes
Term
anoxic
Definition
Absence of oxygen
Term
estuary
Definition
Where ocean water meets freshwater
Term
ecosystem
Definition
Refers to an ecological community and its abiotic environmental context
Term
trophic level
Definition
step in the movement of energy through an ecosystem; an organism's feeding status in an ecosystem
Term
food chain
Definition
a model to show the feeding relationships between a single producer and a chain of consumersk
Term
producer
Definition
also called Autotrophs- organisms that use energy to make their own food
Term
consumer
Definition
organisms that cannot make their own food. Obtains energy from other organisms.
Term
decomposer
Definition
Organism that obtains the energy and materials it needs to survive, grow, and reproduce from the waste products or dead bodies of other organisms
Term
biomass
Definition
weight of dry organic matter per unit of area
Term
Gross Primary Productivity
Definition
the amount of solar energy that plants can convert to chemical energy by photosynthesis
-generally accepted to be 2% of total solar energy. Plant cells use some of the solar energy for respiration
Term
food web
Definition
A diagrammatic representation of which organisms consume which other organisms in and ecological community. You Diagram of trophic relationship
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