Question
Pond Ecosystem Portfolio
Standards:
HS-LS2-6: Evaluate claims, evidence, and reasoning that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem.
HS-LS2-7: Design, evaluate, and refine a solution for reducing the impacts of human activities on the environment and biodiversity.
Objective: Measure the temperature and oxygen content of a pond over the course of a day. Then, go fishing to see what types of fish live in the pond. Many different ponds can be investigated to determine the influence of time, temperature, and farms on oxygen levels.
Introduction:
The fish in a pond are affected by biotic factors such as other fish, aquatic plants, insects, and bacteria. They are also affected by abiotic factors, or nonliving factors such as temperature and the concentration of dissolved oxygen. The main source of dissolved oxygen in pond water comes from plants. Using photosynthesis, aquatic plants use the energy of the sun to produce glucose and release oxygen. Oxygen is a waste gas to plants, but it is the fishes next breath. Dissolved oxygen levels tend to increase as long as the sun is shining, due to photosynthesis. Once the sun sets, the oxygen levels will decrease again because less photosynthesis is occurring.
When water temperature increases, it causes the gas and water molecules to gain more energy which in turn breaks the weak molecular interactions between water and oxygen molecules, causing the oxygen to escape. Also, as water temperature increases, the solubility of oxygen decreases, negatively affecting aquatic habitats and organisms. There is an inverse proportional relationship between water temperature and the amount of oxygen the water can hold. For example, the higher the water temperature, the lower the dissolved oxygen in the water.
Fish cannot breathe in oxygen directly from the atmosphere (air), so they use specialized organs called gills. As a fish opens its mouth, water runs over the gills, and blood in the capillaries picks up oxygen that's dissolved in the water.
The presence of farms also decreases the level of dissolved oxygen. After heavy rainfall, farm runoff travels to nearby ponds. The runoff water contains manure, soil, pesticides, and fertilizers, from farms tend to add a lot of extra nutrients into the water, which help the algae grow quickly. While this increases oxygen levels at first, the algae soon dies and decays. The bacteria that break down the algae use up large amounts of oxygen and cause the oxygen levels in the pond to go down. This process is called eutrophication. Fish need dissolved oxygen to survive. If the amount of dissolved oxygen decreased, the number of fish in the population would decrease.
Directions: Read the Introduction and answer the questions. Each question is worth 1 point.
1. Which of the following is NOT an abiotic factor?
(1 point)
Responses
fish
fish
dissolved oxygen
dissolved oxygen
temperature
temperature
Question 2
2. How does the dissolved oxygen get into the water?(1 point)
Responses
fish
fish
wind
wind
aquatic plants
aquatic plants
sun
sun
Question 3
3. How does the dissolved oxygen get into the fish?(1 point)
Responses
fish surface and breathe air
fish surface and breathe air
fish eat plants
fish eat plants
fish breathe water into their lungs
fish breathe water into their lungs
water passes over the gills and capillaries pick up oxygen
water passes over the gills and capillaries pick up oxygen
Question 4
4. What happens to the dissolved oxygen content when water temperature increases?(1 point)
Responses
dissolved oxygen increases
dissolved oxygen increases
dissolved oxygen decreases
dissolved oxygen decreases
dissolved oxygen stays the same
dissolved oxygen stays the same
none of these
none of these
Question 5
(3 points)
5. The nutrients in the water cause
to grow quickly. This causes an algal bloom. The
breaks down the dead algae tissues and competes with the
for the available dissolved oxygen.
Standards:
HS-LS2-6: Evaluate claims, evidence, and reasoning that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem.
HS-LS2-7: Design, evaluate, and refine a solution for reducing the impacts of human activities on the environment and biodiversity.
Objective: Measure the temperature and oxygen content of a pond over the course of a day. Then, go fishing to see what types of fish live in the pond. Many different ponds can be investigated to determine the influence of time, temperature, and farms on oxygen levels.
Introduction:
The fish in a pond are affected by biotic factors such as other fish, aquatic plants, insects, and bacteria. They are also affected by abiotic factors, or nonliving factors such as temperature and the concentration of dissolved oxygen. The main source of dissolved oxygen in pond water comes from plants. Using photosynthesis, aquatic plants use the energy of the sun to produce glucose and release oxygen. Oxygen is a waste gas to plants, but it is the fishes next breath. Dissolved oxygen levels tend to increase as long as the sun is shining, due to photosynthesis. Once the sun sets, the oxygen levels will decrease again because less photosynthesis is occurring.
When water temperature increases, it causes the gas and water molecules to gain more energy which in turn breaks the weak molecular interactions between water and oxygen molecules, causing the oxygen to escape. Also, as water temperature increases, the solubility of oxygen decreases, negatively affecting aquatic habitats and organisms. There is an inverse proportional relationship between water temperature and the amount of oxygen the water can hold. For example, the higher the water temperature, the lower the dissolved oxygen in the water.
Fish cannot breathe in oxygen directly from the atmosphere (air), so they use specialized organs called gills. As a fish opens its mouth, water runs over the gills, and blood in the capillaries picks up oxygen that's dissolved in the water.
The presence of farms also decreases the level of dissolved oxygen. After heavy rainfall, farm runoff travels to nearby ponds. The runoff water contains manure, soil, pesticides, and fertilizers, from farms tend to add a lot of extra nutrients into the water, which help the algae grow quickly. While this increases oxygen levels at first, the algae soon dies and decays. The bacteria that break down the algae use up large amounts of oxygen and cause the oxygen levels in the pond to go down. This process is called eutrophication. Fish need dissolved oxygen to survive. If the amount of dissolved oxygen decreased, the number of fish in the population would decrease.
Directions: Read the Introduction and answer the questions. Each question is worth 1 point.
1. Which of the following is NOT an abiotic factor?
(1 point)
Responses
fish
fish
dissolved oxygen
dissolved oxygen
temperature
temperature
Question 2
2. How does the dissolved oxygen get into the water?(1 point)
Responses
fish
fish
wind
wind
aquatic plants
aquatic plants
sun
sun
Question 3
3. How does the dissolved oxygen get into the fish?(1 point)
Responses
fish surface and breathe air
fish surface and breathe air
fish eat plants
fish eat plants
fish breathe water into their lungs
fish breathe water into their lungs
water passes over the gills and capillaries pick up oxygen
water passes over the gills and capillaries pick up oxygen
Question 4
4. What happens to the dissolved oxygen content when water temperature increases?(1 point)
Responses
dissolved oxygen increases
dissolved oxygen increases
dissolved oxygen decreases
dissolved oxygen decreases
dissolved oxygen stays the same
dissolved oxygen stays the same
none of these
none of these
Question 5
(3 points)
5. The nutrients in the water cause
to grow quickly. This causes an algal bloom. The
breaks down the dead algae tissues and competes with the
for the available dissolved oxygen.
Answers
GPT-4o mini
### Pond Ecosystem Portfolio Questions
1. **Which of the following is NOT an abiotic factor?**
**Response:** fish
2. **How does the dissolved oxygen get into the water?**
**Response:** aquatic plants
3. **How does the dissolved oxygen get into the fish?**
**Response:** water passes over the gills and capillaries pick up oxygen
4. **What happens to the dissolved oxygen content when water temperature increases?**
**Response:** dissolved oxygen decreases
5. **The nutrients in the water cause** **algae** **to grow quickly. This causes an algal bloom. The** **bacteria** **break down the dead algae tissues and compete with the** **fish** **for the available dissolved oxygen.**
1. **Which of the following is NOT an abiotic factor?**
**Response:** fish
2. **How does the dissolved oxygen get into the water?**
**Response:** aquatic plants
3. **How does the dissolved oxygen get into the fish?**
**Response:** water passes over the gills and capillaries pick up oxygen
4. **What happens to the dissolved oxygen content when water temperature increases?**
**Response:** dissolved oxygen decreases
5. **The nutrients in the water cause** **algae** **to grow quickly. This causes an algal bloom. The** **bacteria** **break down the dead algae tissues and compete with the** **fish** **for the available dissolved oxygen.**