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Stonefly Nymph Abundance Essay

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Candidate name, number and centre number
Calculation of abundance of Stonefly Nymphs in relation to riffles and poles in rivers. Spelling!
Problem: How do temperature, depth and velocity of water in Rifles and Poles affect the abundance of Stonefly Nymphs? Link to course and why did you choose this topic?
Background
The point of this analysis is to compare the abundance of Stonefly Nymphs in rifles vs. Poles. EXPLAIN
The Plecoptera are an order of insects, commonly known as stoneflies. There are around 3,500 species worldwide, with new species still being discovered. Plecoptera are found in both the Southern and Northern Hemispheres and the populations are quite distinct. All species of Plecoptera are intolerant of water pollution and their presence in a stream or still water is usually an indicator of good or excellent water quality. Stoneflies are …show more content…

Null Hypothesis: There is no statistically significant difference in the abundance of Stonefly Nymph between Pools and Riffles.

Stonefly Nymphs live in highly oxygenated, cool, clean and flowing waters, some preferring streams with a significant current on rocky, stony, or gravel substrate. Some even live in sandy areas. Rifles and poles are both strong in certain distinct abiotic factors presented which could mean that one would be likely to present favourable conditions for Stonefly Nymphs than the other. The following analysis will put that theory in to test to see if there is in fact a statistically significant difference in between the two or if there is not.

Independent Variables: Abundance of Stonefly Nymphs
Dependant Variables: Temperature (°C); Velocity (Ms); Depth (Cm)

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