Field Methods Exam 2

ANOVA Test

A statistical method used to compare the means of three or more groups to determine if there are any statistically significant differences between them.

T-Test

A statistical test used to compare the means of two groups to assess whether their means are significantly different from each other.

Chlorophyll Method

Filter paper must be folded in half once and then completely submerged in acetone

Li et al. 2018

A study on the effects of environmental factors on chlorophyll concentration

Nutrient Analysis

A process used to determine concentration of nutrients in a sample using flow injection analysis.

What does TMDL stand for?

Total Maximum Daily Load

Main source of nitrogen to coastal water?

Wastewater, fertilizer, atmosphere

How does nitrogen contribute to hypoxia?

Nitrogen promotes excessive algal growth, which depletes oxygen levels in the water as the algae die and decompose

Formula for chlorophyll

(absorbance * volume of extract)/volume filtered

How to plot standard curve

Absorbance is y; get equation and solve for x. Use the curve whose r squared value is closest to 1

Hypothesis 1

Water quality is impacted by turbidity and mixing leading to increased water column enterococcus

What parameters are used for hypothesis 1?

Turbidity, tides, enterococcus

Hypothesis 2

Water quality is impacted by coastal acidification as evidenced by low pH and high BOD

What parameters are used for hypothesis 2?

pH, BOD, DO

Hypothesis 3

Water quality is impacted by CSOs and will vary with rainfall

What parameters are used for hypothesis 3?

Enterococcus and rainfall

Hypothesis 4

Water quality parameters differ with distance to shore

What parameters are used for hypothesis 4?

DO, salinity, pH, enterococcus, BOD, turbidity

Total maximum daily loads

Calculation of the max amount of a pollutant allowed to enter a waterbody so that the water quality standards are met