Exploring Lake Tri An

What is the Trophic State Index (TSI) classification of Lake Tri An?

• Oligotrophic

• Eutrophic

• Hypereutrophic

• Mesotrophic

Which nutrient is considered a limiting factor for algae growth in Lake Tri An?

• Potassium

• Phosphorus

• Iron

• Nitrogen

How many species of green algae are recorded in Lake Tri An?

• 60

• 30

• 15

• 45

What method is used to determine the relationship between environmental factors and algae community structure?

• Multivariate analysis (e.g., Canonical Correspondence Analysis)

• Simple correlation analysis

• Time series analysis

• Linear regression analysis

Which two genera dominate in the green algae community of Lake Tri An?

• Chlorella and Scenedesmus

• Euglena and Chlamydomonas

• Ulva and Volvox

• Spirogyra and Cladophora

What does a higher TSI value indicate about a lake's nutrient status?

• A higher TSI value indicates lower oxygen levels in the lake.

• A higher TSI value indicates a higher nutrient status in the lake.

• A higher TSI value suggests a decrease in fish populations.

• A higher TSI value means the lake is less productive.

How can the ratio of TN to TP help in understanding nutrient limitations?

• The TN to TP ratio is irrelevant to ecosystem health.

• The TN to TP ratio helps identify whether nitrogen or phosphorus is the limiting nutrient in an ecosystem.

• The TN to TP ratio indicates the overall nutrient concentration in water.

• A higher TN to TP ratio always means better water quality.

What role does phosphorus play in the growth of algae?

• Phosphorus inhibits algae growth by reducing nutrient availability.

• Phosphorus has no effect on algae growth whatsoever.

• Phosphorus acts as a vital nutrient that stimulates algae growth.

• Phosphorus is a harmful substance that kills algae.

Why is it important to monitor the nutrient levels in lakes?

• To enhance recreational activities for tourists.

• It is important to monitor nutrient levels in lakes to prevent eutrophication and maintain ecosystem health.

• To reduce water temperature for better swimming conditions.

• To increase fish populations in the lake.

What are the potential consequences of eutrophication in freshwater bodies?

• Enhanced water clarity

• Improved recreational activities

• Increased fish populations

• Consequences of eutrophication include algal blooms, oxygen depletion, harm to aquatic life, production of toxins, reduced biodiversity, and impaired water quality.