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Biology 101
Chapter 34-38
78
Biology
Undergraduate 2
11/24/2012

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Cards

Term
Describe the chemical and physical factors that affect the biosphere
Definition
1
Term
role of abiotic and biotic factors in the survival of an organism is what?
Definition
Term
describe the characteristics of aquatic biomes
Definition
Term

 

 

Explain the factors contributing to the characteristics of terrestrial biomes

Definition
Term

 

 

Describe the eight major terrestrial biomes

Definition
Term

 

 

Ecology

Definition

 

 

the study of the interactions of organisms with their environments

Term

 

 

Biosphere

Definition
all regions of the earth that inhibits life; includes biotic and abiotic environments; divided into biomes
Term
who is rachel carson?
Definition

 

 

One of the first to perceive the global dangers of pesticide abuse

Term
level of organization and interaction are...
Definition
Organism, population, community, ecosystem, biome, biosphere
Term
  biotic means?
Definition
living
Term
abiotic means?
Definition
non living
Term
abiotic components include:
Definition
atomospheric gases, nutrients, energy, water
Term
habitat
Definition
specific enviornment where an organism lives
Term
Ocean currents
Definition

have a profound effect on regional climates by warming or cooling coastal areas; they are created by winds, planet rotation, unequal heating of surface water, and location and shapes of continents.

 

Term
Aquatic biomes cover what percent of the world?
Definition
75%
Term
Types of aquatic ecosystems
Definition
ocean, estuary, wetlands, freshwater
Term
what are biomes distinguesed primarily on what?
Definition
predominant vegetation
Term
what are key climatic factors?
Definition
temperature and rainfall
Term
biomes are characterized by types of _______.
Definition
communities
Term
population ecology
Definition
changes in population size; factors that regulate populations over time
Term
population
Definition

 

 

A group of individuals of a single species that occupy the same general area

Term
population dynamics
Definition

 

 

Interactions between biotic and abiotic factors

Term
population density
Definition

 

 

number of individuals of a species per unit area or volume

Term
dispersion pattern
Definition

 

 

the way individuals are spaced within their area; can be clumped, random, uniform

Term
clumped, uniformed, and random are types of what?
Definition
dispersion patterns
Term
life tables
Definition

 

 

track survivorship over the life span of individuals in a population

Term
survivorship curves
Definition

 

 

plot the proportion of individuals alive at each age; type I, type II and type III

Term
exponential growth model
Definition

 

 

The rate of population increases under ideal conditions;

Calculated using the equation

G = rN

 

Term
logistic growth model
Definition
takes into account limiting factors, or enviornmental factors that restricts population growth
Term
limiting factors
Definition
environmental factors that restrict population growth
Term
Density independent factors
Definition
typically abiotic factors; fire, flood, etc
Term
life history
Definition
series of events from life to death; traits include age at first reproduction, number of offspring, frequency of reproduction
Term
r/k selection
Definition

r - selective traits

k- selective traits

Term
R selection
Definition
small plants and animals; short lived, quick development, high number of offspring, etc
Term
K selection
Definition
Large plants and animals, long lived, slow development, low level of offspring but high parental care
Term
maximum sustained yeild
Definition

 

 

How much you can take out of a population without causing population decline

Term
Population momentum
Definition

 

 

Human population is expected to continue increasing for several decades

Term
community
Definition

 

 

An assemblage of populations living close enough together for potential interaction

Term
Population ecology
Definition
studies intraspecific interactions, interactions within a population
Term
intraspecific interactions
Definition
interaction within a population
Term
interspecific interactions
Definition
interactions between species
Term
Trophic structure
Definition

 

 

A pattern of feeding relationships consisting of several different levels

Term
food chain
Definition

 

 

Sequence of food transfer up the trophic levels

Term
food web
Definition

 

 

A network of interconnecting food chains ; true food chains are not as neat as a straight line; instead they are more complex. 

Term
species diverisity is define by what two components?
Definition
species richness (how many species are there) and relative abundance (proportional representation of each species)
Term
keystone species
Definition

 

 

A species whose impact on its community is larger than its biomass or abundance indicates; occupies a niche that hold the rest of the community in place

Term
Disturbances
Definition
events that damage biological communities; storms, fires, floods, droughts,
Term
all disturbances are bad?
Definition
no. some small disturbances often have a positive effect. Allows for colonization
Term
ecological succession
Definition
colonization by a variety of species; a success of change gradually replaces other species
Term
primary secession
Definition
begins in a virtually lifeless area with no soil
Term
secondary succession
Definition
when a disturbance distroyed an existing community but left the soil intact
Term
Primary production
Definition

 

 

 

 

is the amount of solar energy converted to chemical energy by an ecosystem’s producers for a given area and during a given time period

Term
biomass
Definition

 

 

 

 

 

 

NET

primary production is the amount of biomass minus the amount used by the producers for their own cellular respiration.

the amount of living organic material in an ecosystem.

Term
ecosystem
Definition
all organisms in a community plus abiotic factors
Term
energy flow
Definition
moves through the components of an ecosystem
Term
chemcial cycling
Definition
transfer of materials within the ecosystem
Term
biogeographical cycles
Definition
biotic, abiotic, and abiotic reserviors; can be local or global
Term
abiotic reserviors
Definition

 

 

where a chemical accumulates or is stockpiled outside of living organisms.

Term
Conservation Biology
Definition
seeks to counter the biodiversity crisis; can protect many species at once by preserving habitats and ecosystems,
Term
Biodiversity has three levels...
Definition
Genetic Diversity (within & btwn species) , species diversity (variety of species in an ecosystem) , ecosysytem diversity ( variety of types of ecosystems)
Term
Ozone Layer
Definition
protects earth from UV radiation
Term
Biological magnification
Definition
Term
Global Warming
Definition
likely to be number one cause of biodiversity loss
Term
pollution
Definition
major threat to biodiversity
Term
Endangered Species
Definition

 

 

One that is "in danger of extinction throughout all or a significant portion of its range"

Term
threaten species
Definition

 

 

Those likely to become endangered in the foreseeable future

Term
extirpation
Definition

 

 

loss of a single population of a species.

Term
Phenotypic plasticity
Definition

 

 

Altering phenotype in response to environmental conditions

Term
Landscape Ecology
Definition

 

 

Application of ecological principles to the study of the structure and dynamics of a collection of ecosystems

Term
Movement Corridors
Definition

 

 

"overpasses" and underpasses that allow movement of animals

Term
Biodiversity hotspot
Definition

 

 

Have a large number of endangered and threatened species; endemic species

Term
endemic species
Definition
species found nowhere else
Term
Zoned reserve
Definition

 

 

Extensive region of land with one or more areas undisturbed by humans

Term

 

 

 

sustainable development

Definition

zone reserve contributes to this;

 

 

 

 

Long-term prosperity of human societies and the ecosystems

Term
Restoration Ecology
Definition

 

 

Uses ecological principles to restore environments

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