Environmental Science
The order of succession in a lithosere or xerosere is

Crustose lichen stage->Foilose lichen stage->moss stage-> ->shrub stage-> herb stage->forest stage (climax community)
Moss stage ->Foilose lichen stage-> Crustose lichen stage ->herb stage->shrub stage->forest stage (climax community)
Foliose lichen stage->Crustose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)
Crustose lichen stage->Foilose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)

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Environmental Science
Low clouds retard surface cooling at night better than clear skies because:

The clouds start convection currents between them
The clouds are better conductors of heat than is the clear night air
The water droplets in the clouds reflect infrared energy back to earth
The formation of the clouds releases latent heat energy
The clouds absorb and radiate infrared energy back to earth

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