Term
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Definition
| openings in leaf for gas exchange |
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Term
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Definition
| release O2 , take in CO2, H2O leaves through stomata |
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Term
| factors that might affect stomata density |
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Definition
| heat, relative concentration of plant/air, wind |
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Term
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Definition
| relative locations of individuals to other individuals vs. movement of people from place to place |
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Term
|
Definition
| no real spacing patterns, null hypothesis |
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Term
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Definition
| discrete groups, resource or behavioral influence |
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Term
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Definition
| spaced, maximum distance from one another, competition/agression |
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Term
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Definition
Establish set areas
Count indiv. in each area
Relatively large number of plots (i.e. sample)
Accurate method, also time consuming
Doesn’t work for all species
Compare variance and mean
Modified t-test |
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Term
| Plot Method - Variance Values |
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Definition
s2/X = 1 random
s2/X > 1 clumped
s2/X < 1 regular |
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Term
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Definition
Random points and measure distance to the nearest individual.
Index of Aggregation |
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Term
| Index of Aggregation - Interpreting Values |
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Definition
A= 2 random
A > 2 clumped
A< 2 regular |
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Term
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Definition
| some type of directional current (opposed to lentric systems) |
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Term
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Definition
| lots of current, over rocky substrate, shallow water, high levels of dissolved O2, high diversity of insects |
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Term
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Definition
| less current, greater water depth, substrate varies, lower level dissolved O2, more adapted insects dealing with less O2 |
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Term
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Definition
| large size rocks, pebbles/clinging insects |
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Term
| Substrate - silt/sand/mud |
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Definition
| smaller sized particles/burrowing insects |
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Term
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Definition
| accumulation of debris that falls in from terrestrial environment; major input into aquatic system; own ecosystem with herbivores, fungivores, and predators |
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Term
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Definition
| number system used to describe streams relative to other streams (1 headwaters…12) |
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Term
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Definition
| species are tolerant to flooding, extreme nutrient cycles |
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