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Pennsylvania Ecosystems
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Pennsylvania Ecosystems
___________and _____________ factors affect the type and numbers of organisms that will live in a given community.
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Limiting Factors _________________ are any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms.
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Examples of Limiting Factors
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What limiting factors are at work in this ecosystem?
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Limiting Factors Continued...
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
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Limiting Factors in Pennsylvania
Pennsylvania has two primary forest types _____________________ Each forest type contains tree species which share similar _______________ ___________. The trees grow in close association with each other.
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Limiting Factors in Pennsylvania
___________________ 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.
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Limiting Factors in Pennsylvania
Precipitation continued... Steep slopes ______________ Low lands ________________ _______________ prefer upland soil (Dry) _______________ prefer low moist soil
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Limiting Factors in Pennsylvania
_________________ Temperature decreases as you go up in ________________________________ Cooler temperatures _______________ ___________________ Ex. ________ in southern PA are replaced by the _______________________ species
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Limiting Factors in Pennsylvania
_______________ Varies with a number of factors __________________ _______________ (Greater on south facing)
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Tolerance ______________ is the ability of an organism to withstand fluctuations in biotic and abiotic environmental factors. Ex. Catfish can survive in warm water with low oxygen. Trout cannot
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