What determines The Plant and AnimalBiota ?- •Nutrient Content •Depth and light penetration •Acidity
What determines The Plant and AnimalBiota ?-Nutrient Content The level of nutrients in the water underpins the existence of all life, plant and animalThe nutrient content is affected by The geology of the catchment. The topography of the catchment. Intensiveness of agriculture in the surrounding area Size of surrounding human population (sewage)
Nutrients Nutrients and Light = Phytoplankton Algae-Diatoms-CyanoBacteria
Oligotrophic Waters Glacial, Linear Valley Lakes Tarns
What determines The Plant and AnimalBiota ?-Depth and light penetration A high density of phytoplankton quickly absorbs the light and reduces the depth at which the light can penetrate to approx 2m ,below this point nothing can grow and animals cannot live.
What determines The Plant and AnimalBiota ?- Acidity Some species only live in PH 4-6 and some species only exist in slightly alkaline waters pH >7.
An Optimum Aquatic Habitat A good supply of Nutrients supporting a high diversity of Plant and Animal life A balanced level of phytoplankton (PRIMARY PRODUCERS) so that light can penetrate through the water A water body deep enough for plants to grow on the floor utilizing the filtered light We can easily design this optimum Habitat.
EmergentsPhragmites australis – Common ReedUses Edible shoots, roots Insulation Fast growing biomass Basketry Tolerant of Wind
Deep MarginalNymphaea alba-White Water LillyUses Edible roots and seeds Medicinal Shade
OxygenatorsMyriophyllum sp.-Water-mifoilUSES Forage for Fish Providing oxygen Edible roots
FloatersLemna minor- Duckweed USES Forage for Fish Shade the water Edible –great for Chickens The dried plant repels mosquitoes Medicinal properties
Common Carp - Cyprinus carpioUses High Protein food Tolerance of a lack of oxygen Rapid growth Easy to feedInfo•Common carps feed on small plants andzooplankton, molluscs, detritus and deadplants.•The deep water is needed for winterhibernation•Logs and rocks with cavities for young fishto shelter
Toads and FrogsUses Frogs and Toads will keep pest populations low A single adult toad can eat as many as 10,000 insects per summer. Including Mosquitoes Edible Frog Frogs legs , taste a bit like chicken apparently :- Rana esculenta Rana esculenta Water quality control :they need clean water ,if you have them around you can be assured your water is clean. If they start growing extra legs be concerned..Position•The ideal pond for frogs and toads includes plenty of shallows for toadsto rest and breed.•A deep area of at least 1.3 meters for overwintering frogs, and plenty ofvegetation around the edges to hide out in.•Provide shallow, not steep, edges so frogs and toads can easily climb inand out, or add a couple logs partly in and partly out of the water.• Both frogs and toads will also really appreciate some rocks around theedges for sunning themselves