Biotic Factor Station 1~Fast Running Water Station 2~Slow Running Water Found in:

Biotic Factors Mayfly nymph Caddisfly nymph Alderfly larva Blood worm Water skater Large stream snail & Reservoir snail Animals Common freshwater shrimp & Long- armed shrimp Damselfly nymph

Goby Mosquito fish Guppy Loach Freshwater crab Biotic Factors Plants: Alocasia Water dragon Colocasia esculenta Wild rice Carex

Mayfly nymph Adaptive Features: ~3long tail filament ~lateral abdominal feathery gills Location: Under rock Number:~ Fast water: 10 Slow water:15

Damselfly nymph Location: Under rock Number:~ Fast water: 0 Slow water: 2 Adaptive features: ~carnivore, easy to catch

Location: Under Rock Number:~ Fast water: 15 Slow water:10 Adaptive features: ~live in case made of sand with hooked terminal claspers Caddisfly larve

Alderfly larva Location: Under Rock Number:~ Fast water: 4 Slow water: 7 Adaptive features: ~large biting mandibles ~8 pairs of lateral filaments on abdomen

Blood Worm Location: Under Rock/ in bottomm sediments Number:~ Fast water: 7 Slow water:10 Adaptive features: ~blood gills ~red in colour

Water Skater Location: On water surface Number:~ Fast water: 0 Slow water: 5 Adaptive features: ~long, thin legs ~hair on legs ~thin, flattened body

Large stream snail & Reservoir snail Location: Under Rock Number:~ Fast water: 5 Slow water: 9 Adaptive features: ~have operculum ~get chemical to make operculum

Common freshwater shrimp & Long armed shrimp Location: On bottom Number:~ Fast water: 0 Slow water: 3 Adaptive features: ~white, creamy pink or grey brown in colour ~more than 3 pairs of legs ~flattened body

Freshwater crab Location: On bottom Number:~ Fast water: 0 Slow water: 1 Adaptive features: ~have abdomen greatly reduced ~males have a narrow abdomen with the first pair of appendages modified into a penis ~females have a broad abdomen under which the egg- mass is carried at breeding time

Goby Location: Free swimming Number:~ Fast water: 0 Slow water:4 Adaptive features: ~appearance and size ~mouth is large for attacking

Mosquito fish Location: Free swimming Number:~ Fast water: 12 Slow water: 35 Adaptive features: ~change colour to match surrounding

Guppy Location: Free swimming Number:~ Fast water: 7 Slow water: 13 Adaptive features: ~female is drab olive-brown in colour ~male show a tremendous diversity in colour

Loach Location: On bottom Number:~ Fast water: 8 Slow water: 15 Adaptive features: ~elongated and compressed body ~3 pairs of barbels

Alocasia odora Type: Waterside Number:~ Fast water: 1 Slow water: 0 Adaptive features: ~Leaves oval

Colocasia esculenta Type: Waterside Number:~ Fast water: 12 Slow water: 15 Adaptive features: ~leaves oval to slightly shield-shaped ~20-50cm in diameter

Water Dragon Type: Rooted in stream bed, but with protruding foliage Number:~ Fast water: 3 Slow water: 0 Adaptive features: ~each node bearing a number of white, fleshy, cylindrical, sac-likee devices for respiration and floatation

Wild rice Type: Waterside Number:~ Fast water:15 Slow water:18 Adaptive features: ~rhizome stout, with fibrous roots ~stem erect with adventitious roots

Carex Type: Waterside Number:~ Fast water: 17 Slow water:20 Adaptive features: ~leave narrow and linear ~flower stalks sharply triangular

Thanks to our tutors: ~Mr. Wai ~Mr. Kan and all the technians