Flashcards
AS-Level Biodiversity Under Threat Glossary
Cards in this deck (28)
- 1Alien SpeciesA species introduced into an area which can act as a threat to endemic populations, e.g. quinine tree in Galapagos
- 2AnaerobicLacking oxygen (soils in which mangroves grow)
- 3AquacultureFarming of freshwater and seawater organisms, e.g. Shrimp farming in Indonisia
- 4Carbon SequestrationStorage of carbon, soils are a huge store of CO2
- 5BiodiversityThe variation of life forms within a given ecosystem, biome or for the entire Earth
- 6Biodiversity HotspotAn area with over 1500 vascular endemic plants which has lost 70% of its original landmass
- 7BiomassAll living material, measured in kg/m2/year
- 8BiomeA large global ecosystem characterised by the dominant vegetation type, e.g. TRF
- 9Coral BeachingLoss of colour in the coral, usually linked to global warming. Algae which provides colour dies due to stresses such as sea level rise
- 10Eco-RegionA large area of land or water with geographically distinct natural communities
- 11EcosystemCommunity of plants and animals together with the environment in which they live
- 12Ecosystem DiversityA measure of the diversity of the total ecosystem
- 13EndemicNative to a particular region or country, e.g. Kangaroo is endemic to Australia
- 14EutrophicationIncrease in the nutrients within an ecosystem, usually in water, which increases the NPP. Over time this leads to a growth in algae and a lack of oxygen and a reduction in water quality and fish populations
- 15Genetic DiversityVariations between individuals of the same species - the "Gene Pool"
- 16Gersmehl's Nutrient CyclesThe transfer of nutrients between the three main stores, biomass, litter, and soil. Stores are representative of the size, e.g. Biomass is the largest store in the TRF
- 17HabitatThe environment in which a species lives
- 18LeachingThe loss of nutrients from the soil due to heavy rain. Nutrients are washed out
- 19Millenium Development GoalsEight development goals agreed by 192 UN member states, include reducing extreme poverty and ensuring environmental stability
- 20Millennium Ecosystem AssesmentA research programme which focuses on ecosystem changes over time, intending to record and protect levels of degradation
- 21NPPNet primary production. The amount of new growth measured in g/m2yr
- 22PermafrostSoil which has been below freezing point for two or more years
- 23PneumatophoresSpecial adaptation of roots to grow upwardsto survive anaerobic conditions, linked to mangroves
- 24Ramsar SitesA treaty for the conservation and protection of wetlands
- 25Species DiversityThe variety of species within a given region or ecosystem
- 26Sustainable YieldThe maximum that can be extracted from an ecosystem without taking from the base level and leading to declining in resources
- 27TrophicA level in the food chain
- 28ZonationSpecies grow in distinct areas depending on tolerance, e.g. Red, Black and Grey mangroves show zonation depending on their tolerance to salinity and waterlogged soils
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- Flashcards of all the key terms for AS-Level Biodiversity under Threat
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- Kieran C
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