76.1k views
4 votes
Design a simple, manipulative experiment to test the hypothesis that plastic debris in the water influences the population density of the marine copepod, Centropages hamatus. Your experiment can have no fewer than two treatments and no more than four. A. State your hypothesis. B. Briefly describe your experiment. Address the following: - Is it a field or lab experiment? - What are the treatments, how are they set up, and what differentiates them? - How many replicates of each treatment will there be? - What are the standardized conditions of your experiment? C. Identify the independent variable, including units, in your experiment. D. Identify the dependent variable, including units, in your experiment. E. Identify at least one control treatment and explain its specific role in the experiment. F. Draw a graph of potential data that would support your hypothesis. The graph must follow all of the guidelines set out at the start of the semester.

User Tskjetne
by
8.1k points

1 Answer

4 votes

Answer:A. Hypothesis:

Hypothesis: Increased plastic debris in the water will lead to a decrease in the population density of the marine copepod, Centropages hamatus.

B. Experiment Description:

This experiment will be conducted in a controlled laboratory setting.

Treatments:

Control Group: Tanks with no plastic debris.

Low Plastic Group: Tanks with a moderate amount of plastic debris (representing a realistic but low plastic pollution scenario).

High Plastic Group: Tanks with a high concentration of plastic debris (representing a more severe plastic pollution scenario).

Replicates: For each treatment, there will be at least three replicates to ensure statistical validity and account for variability.

Standardized Conditions: The tanks will have consistent temperature, salinity, light exposure, and food availability to minimize potential confounding variables.

C. Independent Variable:

The independent variable is the level of plastic debris concentration in the tanks, measured in grams of plastic debris per liter of water (g/L).

D. Dependent Variable:

The dependent variable is the population density of Centropages hamatus, measured as the number of copepods per liter of water (individuals/L).

E. Control Treatment:

The control treatment consists of tanks with no plastic debris. Its role is to provide a baseline population density of Centropages hamatus in the absence of plastic pollution, allowing for a comparison against the other treatments to assess the impact of plastic debris.

F. Graph:

The graph will have the independent variable (plastic debris concentration in g/L) on the x-axis and the dependent variable (population density of Centropages hamatus in individuals/L) on the y-axis.

It will consist of at least three lines or bars, one for each treatment (Control, Low Plastic, High Plastic).

The graph will likely show a trend where the population density decreases as plastic debris concentration increases, supporting the hypothesis. The Control group will have the highest population density, the Low Plastic group will have an intermediate density, and the High Plastic group will have the lowest density.

Please note that this is a simplified hypothetical experiment for illustration purposes. In a real experiment, you would need to determine specific plastic debris concentrations, copepod maintenance protocols, and statistical analysis methods. Additionally, ethical considerations and proper waste disposal methods for plastic debris should be taken into account when conducting such experiments.

User David Oganov
by
8.2k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.