Nutrient cycles The nitrogen cycle Inputs of nutrients : 1.Precipitation & dry deposition 2.Weathering of bedrock 3.[Artificial supplements]

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Presentation transcript:

Nutrient cycles

The nitrogen cycle

Inputs of nutrients : 1.Precipitation & dry deposition 2.Weathering of bedrock 3.[Artificial supplements]

Three possible stores : 1.Soil 2.Leaf litter 3.Biomass

Outputs of nutrients : 1.Runoff 2.Leaching 3.[Human removal]

Where are the nutrients stored in an ecosystem? the answer varies from one ecosystem to another dependent on : –temperature –precipitation –vegetation type

Gersmehl diagrams how do the inter-relationships between nutrient stores and flows differ between biomes? a big question! best answered with DIAGRAMS…

Temperate deciduous forest balance between stores moderate transfers between stores

Boreal forest (taiga) litter is main store (needles) little transfer between stores

Tropical rain forest biomass is main store rapid transfer between stores and environment

Nutrient cycles Inputs of nutrients : 1.Precipitation & dry deposition 2.Weathering of bedrock 3.[Artificial supplements] Three possible stores : 1.Soil 2.Leaf litter 3.Biomass Outputs of nutrients : 1.Runoff 2.Leaching 3.[Human removal] Where are the nutrients stored in an ecosystem? the answer varies from one ecosystem to another dependent on : –temperature –precipitation –vegetation type Gersmehl diagrams how do the inter- relationships between nutrient stores and flows differ between biomes? a big question! best answered with DIAGRAMS…