Pennsylvania Ecosystems Pennsylvania Ecosystems n and factors affect

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Pennsylvania Ecosystems

Pennsylvania Ecosystems

Pennsylvania Ecosystems n ______and _______ factors affect the type and numbers of organisms that

Pennsylvania Ecosystems n ______and _______ factors affect the type and numbers of organisms that will live in a given community.

Limiting Factors n _________ are any biotic or abiotic factor that restricts the existence,

Limiting Factors n _________ are any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms.

Examples of Limiting Factors n n n _____________________ ___________

Examples of Limiting Factors n n n _____________________ ___________

What limiting factors are at work in this ecosystem?

What limiting factors are at work in this ecosystem?

Limiting Factors Continued. . . n A limiting factor in one population will have

Limiting Factors Continued. . . n A limiting factor in one population will have a __________ on other populations in that ecosystem. Lack of rain Less grass seed Reduction in mice population Reduction in hawk population

Limiting Factors in Pennsylvania has two primary forest types n n n _____________________ Each

Limiting Factors in Pennsylvania has two primary forest types n n n _____________________ Each forest type contains tree species which share similar ________. The trees grow in close association with each other.

Limiting Factors in Pennsylvania n __________ n n Rain/snow Average for PA is _______

Limiting Factors in Pennsylvania n __________ n n Rain/snow Average for PA is _______ inches; ___ in western plateau Precipitation _______ through the soil where trees absorb the water and the nutrients dissolved in it Soil moisture depends on how _______ the slope of the land is.

Limiting Factors in Pennsylvania n Precipitation continued. . . n n Steep slopes _______

Limiting Factors in Pennsylvania n Precipitation continued. . . n n Steep slopes _______ Low lands ________ n n ________ prefer upland soil (Dry) ________ prefer low moist soil

Limiting Factors in Pennsylvania n _________ n n n Temperature decreases as you go

Limiting Factors in Pennsylvania n _________ n n n Temperature decreases as you go up in ________________ Cooler temperatures ___________________ Ex. ____ in southern PA are replaced by the ____________ species

Limiting Factors in Pennsylvania n n ________ Varies with a number of factors n

Limiting Factors in Pennsylvania n n ________ Varies with a number of factors n n n __________________ (Greater on south facing)

Tolerance n _______ is the ability of an organism to withstand fluctuations in biotic

Tolerance n _______ is the ability of an organism to withstand fluctuations in biotic and abiotic environmental factors. n Ex. Catfish can survive in warm water with low oxygen. Trout cannot