Hundreds of sea gulls scavenge for food as bulldozers bury rubbish at the now-closed Wake County Landfill in North Raleigh in this file photo. A study by Duke University researchers concludes that gulls feeding on trash can be a significant course of nitrogen and phosphorus at nearby lakes. TRAVIS LONG TRAVIS LONG
Sea gulls can be a significant source of nitrogen and phosphorus at nearby lakes.
( z1 possible :ARG1 ( z2 source :ARG0 ( z3 gull :mod ( z4 sea ) ) :ARG1 ( z5 and :op ( z6 nitrate ) :op ( z7 phosphorus ) ) :ARG1-of ( z8 significant ) :location ( z9 lake :mod ( z10 nearby ) ) ) )