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11. Two reasons why nature preserves may need active management by paid staff as well as volunteers include...........
a) removal of alien species (both weeds and introduced animals (ex.- removal of feral pigs from nature preserves in Hawaii or removal of yellow star thistle (stickery weed) from preserves in Oregon.
b) protection of species illegally harvested for food, medicines, or animal derivitives.
c) protection of habitat from off-road vehicles.
d) restore degraded areas by removing weeds and planting native vegetation.
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