Shared Flashcard Set

Details

Mid term review
environmental change and challenge
14
Geography
Undergraduate 1
10/24/2013

Additional Geography Flashcards

 


 

Cards

Term
What is ecological succession? and what are the 2 types?
Definition
gradual replacement of 1 species by another as conditions change over time. The 2 types are primary & secondary
Term
What is a disturbance?
Definition
an event that alters ecosystem structure and function; often natural part of health ecosystem
Term
What factors determine the climax of an ecosystem?
Definition
climate, constant species, soil
Term
What is secondary succession?
Definition
development of biotic communities on previously disturbed vegetated surfaces; faster than primary and initiated by invading species (weeds)
Term
what occurs with succession and what does the INTERMEDIATE DIVERSITY HYPOTHESIS state?
Definition
NPP decreases, biodiversity increases. moderate disturbance = more biodiversity than high/ low disturbance
Term
Name the effects of human activity on ecological succession
Definition
keep ecosystems in early stages, increase productivity, ^ water/nutrient cycling with greater losses, reduced biodiversity, increase in pioneer species
Term
what is lithification
Definition
components compact, expel fluid, and become rock
Term
The nitrogen cycle is...
Definition
... one of the most important nutrient cycles found in terrestrial ecosystems
Term
What is the law of entropy
Definition
when energy is transformed from one form to another, there is a decrease in the quality of useable energy; energy cannot be recycled; the more energy transformed the more it's dispersed into the atmosphere
Term
Energy is...
Definition
... the capacity to do work
Term
Low-quality energy is...
Definition
... diffused and dispersed, low temperatures (oceans)
Term
High quality energy is...
Definition
... easy to use, disperses quickly (fire, gasoline
Term
Kinetic energy
Definition
energy from an objects motion or mass
Term
potential energy
Definition
stored energy available for later use
Supporting users have an ad free experience!