Bioindicators and Mayfly Characteristics

The video tutorial explains bioindicator species, organisms used to monitor ecosystem health. It highlights their ability to indicate environmental changes and pollutant effects. Characteristics of bioindicator species include known classification, wide distribution, and cost-effectiveness. The mayfly is a key bioindicator for water quality, sensitive to pollution, and beneficial for fishing and tourism. The tutorial also provides tips for differentiating mayfly nymphs from similar species.

What is the primary function of bioindicator species?

• To provide food for predators

• To monitor environmental health

• To control pest populations

• To increase biodiversity

Which of the following is NOT a characteristic of a good bioindicator species?

• Limited geographical range

• Early warning capability

• Cost efficiency

• Well-known classification

What is the scientific classification of mayflies?

• Kingdom Animalia, Phylum Mollusca

• Kingdom Fungi, Phylum Insecta

• Kingdom Animalia, Phylum Arthropoda

• Kingdom Plantae, Phylum Arthropoda

How can you differentiate a mayfly nymph from a stonefly nymph?

• Mayfly nymphs have three long filaments

• Stonefly nymphs have three long filaments

• Mayfly nymphs have two long filaments

• Stonefly nymphs have no filaments

Why are mayflies considered good bioindicators?

• They are resistant to pollution

• They are rare and hard to find

• They are sensitive to pollution

• They are found in polluted waters

Which group do mayflies belong to in terms of pollution sensitivity?

• Group 2: Moderately intolerant

• Group 1: Pollution-sensitive

• Group 4: Pollution-tolerant

• Group 3: Fairly intolerant

What do mayflies require in their habitat to thrive?

• Low dissolved oxygen

• Warm water and low nutrients

• Cold water and high dissolved oxygen

• High levels of pollution

How do mayflies contribute economically to their habitats?

• By reducing pollution

• By attracting tourists for fishing

• By increasing water temperature

• By providing food for birds

What is a sign of a healthy ecosystem in relation to mayflies?

• Presence of few mayflies

• Presence of dead mayflies

• Absence of mayflies

• Presence of many mayflies

Why might people tolerate mayflies in their environment?

• They are harmful to fish

• They are a sign of a healthy ecosystem

• They indicate poor water quality

• They are a nuisance