Black silhouette of Douglas Fir isolated on white background. Drawing of evergreen coniferous plant, Oregon state tree. Douglas fir illustration, drawing, engraving, ink, line art, vector Illustration ...
As aridity increased, ecosystem-level tree species richness declined on average from four to one species, Douglas-fir site index declined from 30 to 15 m, and ecosystem carbon storage decreased from ...
Vector sketch illustration. Black silhouette of Douglas Fir isolated on white background. Drawing of evergreen coniferous plant, Oregon state tree. Douglas fir illustration, drawing, engraving, ink, ...
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