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Explain how phytopthora ramorum, which causes sudden oak death, could be considered a keystone species in...

Explain how phytopthora ramorum, which causes sudden oak death, could be considered a keystone species in the forest and Savanna’s of California and western unites states
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Phytopthora ramorum is very famous keystone species in the forest and Savannah's of California and western unites states due to favorable atomospheric and whether condition of that area. Phytophthora ramorum is an oomycete plant pathogen classified in the kingdom Stramenopila. P. ramorum is the causal agent of sudden oak death on coast live oak and tanoak as well as ramorum blight on woody ornamental and forest understorey plants. It causes stem cankers on trees, and leaf blight or stem dieback on ornamentals and understorey forest species. This pathogen is managed in the USA and Europe by eradication where feasible, by containment elsewhere and by quarantine in many parts of the world.

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