Biodiversity
Name the three types of Biodiversity.
Species Diversity
Genetic Diversity
Ecosystem Diversity
Name the three key characteristics of a population.
Size, density, and dispersion.
Define ecological succession.
A series of events by which life comes back.
If you have more individuals in an area of an ecosystem, that ecosystem is said to have a high ________.
density
Name the two types of ecological succession.
1. Primary succession
2. Secondary succession
What does it mean when a species is endangered?
A species is considered endangered when its numbers become so low that extinction is possible.
What are the four ways that you could measure a population size?
1. Direct Observation
2. Indirect Observation
3. Sampling
4. Mark and Recapture
Define dispersion.
The spacing of organisms relative to one another (clumped, uniform, random).
True or False: Fluctuation around the carrying capacity is a sign of a healthy population.
True
Which species is the first to arrive during primary succession, since they do not need soil to survive.
Lichens/ Grass/ Moss
Name 3 examples of disturbances to an ecosystem.
Could include: Climate change, natural disasters, habitat loss, pollution, introduced (invasive) species, and overharvesting.
What are the four factors that could affect a growth rate? (Two increasing and two decreasing).
Birth, immigration, death, emigration
Define Carrying Capacity.
The number of individuals the environment can support in a given area.
What is the difference between density independent and density dependent factors?
Density independent factors are abiotic and do not depend on population size.
Density dependent factors are biotic and do depend on population size.
When plants die, they add more ______ to the soil.
Nutrients
Name two examples of how biodiversity is important to humans.
Could include: food from harvesting plants and animals, crop production through crossbreeding plants, raw materials needed for clothes, furniture, buildings, and pharmacy products.
What is the difference between immigration and emigration?
Immigration = entering, going into
Emigration = exiting, leaving
Define density.
The amount of different species and number of those species living in the ecosystem. # of individuals per area of an ecosystem.
What are the main reasons that a population might grow exponentially?
1. Birth rates and death rates are constant.
2. Immigration = Emigration
3. There are more births than deaths.
What is a climax community?
A stable group of plants and animals is the end result of the succession process.
What is a keystone species?
A species whose presence is crucial in maintaining the integrity of its ecosystem through species diversity and organization.
Name and describe the three types of growth rates.
Positive growth rate- incline, goes up.
Negative growth rate- decline, goes down.
Zero growth rate- flat line, stays constant.
Define habitat loss.
When land is cleared in an effort to create areas such as farm lands, cities, etc.
How do R strategists and K strategists differ?
R strategists: short life span, small body, reproduce quickly, have many young, little parental care.
K strategists: long life span, large body, reproduce slowly, have few young, provide parental care.
Which occurs faster, Primary or Secondary succession?
Secondary succession