Midterm Review Flashcards
(21 cards)
environmental science
the study of the impact of humans on the environment
Explain how ES is an interrelated subject
ES deals with politics, ethics, technology, social issues, and chemistry
Overview of Env. Ethics
- ethics are what actions are right and are wrong
- cultural realism is what is right in one’s mind may be viewed differently
- laws should match ethical commitment of those living there
- sometimes what is good for the people may conflict with the environment
Compare biotic and abiotic factors
- biotic : LIVING things that affect the environment,
- abiotic : NON-LIVING factors that arent living that effect the environment
Populations
groups of individuals of the same species in the same area community- interacting groups of different species
biosphere
a global sum of all ecosystems ,
ecosystem
a group of interacting species along with their physical environment,
species
a group of organisms that can interbreed and produce offspring capable of reproduction
food chain
the series of organisms involved in the passage of energy from one trophic level to the next
food web
intersecting and overlapping food chains
Parasitism
one species, the parasite, benefits at the expense of the other, the host
commensalism
an association between two organisms in which one benefits and the other derives neither benefit nor harm.
mutualism
beneficial to both organisms involved.
keystone species
a species that play as critical role is maintaining a specific ecosystem, the loss of this species has a made negative effect on the rest of the ecosystem
jcurve
exponential growth…it is when population size increases at constant rate because everyone has access to abundant food (ideal conditions of living)
scurve
logistic growth … it is when the rate of the population slows down as it reaches the carrying capacity (when the environment cant longer handle the number of species)
Density-Dependent Factors
A limiting factor that depends on population size • competition • predation • parasitism • disease
Density-independent
factors affect all populations in similar ways, regardless of the population size
• unusual weather
• natural disasters
• seasonal cycles
• certain human activities—such as damming rivers and clear-cutting forests
growth rate equation
(Present) - (Past)
______________
(Past)
population density equation
number of organisms
_______________
area
Geology
the study of earths physical features process and history
