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100
what type of succession begins where an ecosystem has been disturbed, removed, or destroyed?
primary succession
100
each population in an ecosystem has an _________ _______ (two words) to changes in its physical and chemical environment
range of tolerance
100
products obtained from nature that humans can use such as lumber, medicines and food crops are
provisions
100
the aesthetic value of an ecosystem provides...
a cultural service
100
an island with fewer resources may also have ____ species
fewer
200
Lightning strikes a forest and burns all the low lying plants. What happens next?
secondary succession
200
too much or too little of any physical or chemical factor can prevent the growth of a population. What is this called?
limiting factor
200
Human waste is often dumped in the ocean. Microbial organisms in marine ecosystems can break down organic waste into less harmful components. This is an example of
a regulating service
200
which island would have more species richness: island closest or mainland or furthest from mainland
closest
200
a decline in species diversity is associated with a(n) ______ in the functions an ecosystem provides
decline
300
what is the main difference between primary and secondary succession?
primary- no soil
secondary- soil
300
what is the order of succession shown in this image?
C, D, A, B
300
small populations are more vulnerable to unpredictable events leading to this
extinction
300
what do species need to have in order to overcome environmental stressors?
more genetic diversity
300
when a spruce tree is harvested so the wood can be used to build a house, the tree is providing
a provision
400
late successional plants are largely unaffected by plants at earlier stages of success because they are not in direct competition for resources. What is this called?
tolerance
400
What is the result of the appearance of pioneer species in Primary Succession?
To rebuild soil
400
what is the specific term for a species not natural to the environment
invasive species
400
what is the name for certain plants or animals that exert more of an influence on the ecosystem as a whole than others do
keystone species
400
which type of ecosystem service is biogeochemical cycles
regulating
500
the ability of a living system to survive moderate disturbances is called _____
inertia
500
What is the name given to lichen or algae after primary succession?
pioneer species
500
Two savanna communities both contain 15 plant species. In community A, each of the 15 species is represented by 20 individuals. In community B, 10 of the species are each represented by 12 individuals; the remaining 5 species are each represented by 3 individuals. Which community exhibits higher species evenness?
community A has higher species evenness
500
what is it called when and ecosystem remains unchanged when being subjected to disturbance
resistance
500
this is how animals are able to adapt to natural disruptions in their environment
incremental changes at the genetic level