Tubulin dimers in which the β-subunit has bound GTP are added preferentially to (+) end of the microtubule.

TLS Online TPP Program

#Id: 5978

#Unit 10. Ecological Principles

Productivity per day ( NPP per ground area per day )  Tropical forest > Temperate forest > Tropical savannas and grass land > Temperate grass land = Mediterranean shrub land >  Crops > Desert = Boreal forest > Arctic tundra 

Mediterranean shrub land = Desert > Arctic tundra >  Temperate grass land > Tropical forest > Tropical savannas and grass land >  Temperate forest > Crops > Boreal forest  

TLS Online TPP Program

#Id: 5979

#Unit 10. Ecological Principles

Decomposition Decomposition is the physical and chemical breakdown of dead plant and animal biomass. Decomposition is increased by High Temperatures, Soil Moisture, and Soil Nutrients.

TLS Online TPP Program

#Id: 5980

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5981

#Unit 10. Ecological Principles

Temperatures are warm in Tropics, Decomposition process are fast and 75% of the litter mass decomposes within 3 months. 

TLS Online TPP Program

#Id: 5982

#Unit 10. Ecological Principles

In the frozen tundra of the Arctic, over 100 years may be needed to decompose 75% of the litter mass. Tree species with high lignin: nitrogen ratios were more resistant to decomposition

TLS Online TPP Program

#Id: 5983

#Unit 10. Ecological Principles