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Population Trend of the World’s Monitored Seabirds, 1950-2010

Fig 3

Population size per seabird family, monitored (i.e., ≥ 5 records) versus unmonitored (i.e., 1–4 records).

Population size was estimated per population as the median between earliest and latest available records, then summed per family.

Fig 3

doi: https://doi.org/10.1371/journal.pone.0129342.g003