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biomass(16)
conservation(10)
vegetation(9)
carbon(8)
degradation(7)
grasslands(7)
surface water(7)
density(6)
organic matter(6)
lakes(5)
nitrogen(5)
population(5)
coral reefs(4)
erosion(4)
fisheries(4)
forests(4)
invasive species(4)
sustainability(4)
carbon dioxide(3)
isotopes(3)
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