Unit Two Test Flashcards
Ecosystem Diversity
The number of different habitats available in a given area
Species Diversity
The number of different species in an ecosystem and the balance of the population
Genetic Diversity
How different the genes are of individuals within population
Richness
Total number of different species found in an ecosystem
Evenness
Measure of how all the individual organisms in an ecosystem are balanced between different species
Bottleneck Event
Disutrbance/Disaster that drastically reduces population, size, and skills of organisms
What is inbreeding depression?
When organisms mate with closely related family members
Ecosystem Resillience
An ecosystem returns to it’s original conditions after a major disturbance
Ecological Range of Tolerance
Range of conditions that an organism can endure before injury or death
What is optimal range?
When an organisms survive, grow, and reproduce
Zone of physiological stress
Organisms survive but with stressors like infertility, lack of growth, and decreased activity levels
Zone of intolerance
Organisms will die
What are limiting factors?
Soil, freshwater lakes and rivers, bays and estuaries
Specialists
smaller range of tolerance or narrower ecological niche makes them more prone to extinction
What are examples of specialists?
specific food requirements and decreased ability to adapt to new conditions
Generalists
larger range of tolerance, borader nniche makes them less prone to extinction and more likely to be invasive
What are examples of generalists?
broader food requirements and higher adaptability
Quality
k-selected species
Quantity
r-selected species
Examples of k-selected species
fewer offspring, reproduce multiple times, long lifespan, change of invasives
Examples of r-selected species
many offspring, may reproduce, shorter life span, more likely to be invasive, rapidly changing
Survivorship Curve
line that shows survival rate of cohort in a population from birth to dead
Type 1 is mostly
k selected species
Type 2 is mostly
in between r and k
Type 3 is mostly
r selected