KarstWhat is it? Why is it important? Why we should protect it?
Kostivere karst area
What exactly is karst?• Geological formation shaped by the dissolution of a layer or layers of soluble bedrock• Usually carbonate rock (limestone or dolomite)• Has also been documented for weathering resistant rocks, such as quartzite given the right conditions
Why is it important?
Mineralogical ValuesCave pearls - Mineral deposits in karst terrain can be extensive,and come in a variety of formsRecreation – Mineral depositsCreate formations that add toRecreational values (e.g., Cave pearlsstalactites, stalagmites,moon milk, cave pearls, etc.)Mineral resources – Carbonate bedrocks have long been recognizedfor their mineral valuesOil and gas – Karst areas can be favourable environments for oil andgas
HydrologicalValuesKarst hydrological systemscan move large quantitiesof water in a relativelyshort period of time.These rapid transit timesand the limited ability ofsubsurface streams tocleanse and filter meansthat introduced harmfulsubstances have thepotential to seriouslyimpact sensitive karstenvironments, humanwater supplies, andimportant fish-rearingstreams.
Biological Values• Forest productivity – Karst ecosystems are commonly more productive than similar forest sites on non-karst terrain. This increased productivity can be largely attributed to the well- drained soils and nutrient cycling associated with karst.• Plant and animal habitats – Karst ecosystems often support unusual or rare plant and animal species, both on the surface and underground.
Some examples of rare species:• Some ferns and mosses require • Trogloxenes utilize caves. For a limestone substrate on which to example, bats use caves for grow and other fern species have roosting and hibernation. adapted to growing in the cool, moist twilight conditions of cave entrances.• Elk and deer use cave entrances during summer for bedding down because the air from caves is cooler and also during the winter when cave air is generally warmer than surrounding temperatures.
• My name is Andrea Aun. I’m 17 year-old student from Estonia. I go to 10th grade in Viimsi school.• I chose this theme because in Estonia, there are so many magnificent karst areas and we really should protect them.