Succession in Ecosystems SOL Bio 9c Human Population SOL BIO 9a

_____________________- a series of _________________ in a __________________ in which new populations of organisms ______________ _______________ existing ones

___________ ________________- colonization of ______ sites by communities of organisms – takes place on _______ ________

_____________ ______________- New ______________ rock comes from _____ sources: 1. ____________________ lava flow cools and forms rock

______________ ______________- New _____________ rock comes from 2 sources: 2. _________________ retreat and __________ rock

______________ ______________- the first organisms to colonize a new site Ex: __________ are the __________ to colonize lava rocks

______________ ______________- Rock

_______________ _____________- a stable, mature community that undergoes _______________ or _______ succession

_______________ _____________- Ex: In most of _______________, the climax community would be a _________ ___________–_______________forest                                                                                                                                 

______________ ______________-

_______________ _____________- sequence of community ____________ that takes place when a community is __________________ by natural disaster or _______________ actions – takes place on ________________ soil

______________ ______________- Ex: A _____________ levels portions of a forest

________________ ____________- Ex: A farmer plows his field

______________ ______________-

Pond Succession

Population Growth SOL BIO 9a

Factors That _________ Future Population Growth ____________ + + - Population ________ ______ - ___________

Other factors that affect population growth _______________ ______________- any ___________ or __________ factor that restricts the existence of organisms in a specific environment. EX.- Amount of ________ Amount of ___________ __________________

Other factors that affect population growth ______________ _____________- the _____________ population size that can be supported by the available resources There can only be as ________ organisms as ________________ resources can support Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

_______________ ________________ Nu m b e r J-shaped curve (exponential growth) Carrying Capacity (k) S-shaped curve (logistic growth) Ok so Time

2 Life History Patterns 1.__ ___________ __________ life span ________ body size Reproduce ________ have many young Little __________ care Ex: cockroaches, weeds, bacteria

2 Life History Patterns 2.__ _________ _______ life span ______ body size Reproduce ______ have few young _________ parental care Ex: humans, elephants

Human Population Growth