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1
Fieldwork Report
Student Name
Institutional Affiliation
Course Name and Number
Instructor’s Name
Date
2
Fieldwork Report
Methods
Quadrate sampling technique was the method used in the field survey. The sampling was
done by placing random quadrates on high and mid tidal zones and checking molluscs
assemblies through quantitative analysis. Data collected was summed up for data analysis by the
following segments; species abundance, the type of species found and in what quadrate or zone
they were found.
The supporting data included using a randomly placed quadrate sampling technique. A
total of 12 molluscs species were recorded and found in two Habitats: emergent and Rock-pool.
The supporting data includes the two years of sampling data that is 2016 and 2017.
For the first hypotheses:
1). Gastropod abundance vs. species and height on the shore
The data to be analyzed was the species type, species abundance and the shore tidal
height. The analysis that was performed on this set of data is simple linear regression. Data
cleaning had to be done on the data to remove missing files and rows of data. The data was
coded since it had categorical variables such as shore height with two codes and species with
three codes. The data is undergoing linear regression; hence plots of the relationship between
variables and outcome variable were plotted, and then a linear model was done with its
summary. We checked for the mean of residuals and the homoscedasticity of residual variances
through the after plots.
2) Species composition in Rock-pool vs. emergent habitats, and among sampling years
3
The data to be analyzed was the 12 species types, the habitats and the year of study. The
habitats and year variables were coded since they are not continuous. The tests done on this data
s...