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

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

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Environmental Science
A food web is

The tropic (feeding) levels that can be observed in an ecosystem
A set of interconnected food chains, illustrating the tropic relationships among species
Like a food chain
The set of prey species that are consumed by animals in an ecosystem

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