Table 1 Estimated total and labile forms of excreted N and P arranged by seabird order

From: Seabird colonies as important global drivers in the nitrogen and phosphorus cycles

Order Breeding birds and chicks (millions) Number of species Total N (Gg N y−1) Labile N (Gg N y−1) Total P (Gg P y−1) Labile P (Gg P y−1)
Charadriiformes 291 127 116 9.8 19 5.1
Pelecaniformes 30 53 51 6.5 9 1.5
Procellariiformes 424 123 117 21.2 20 4.3
Sphenisciformes 59 17 307 35.0 51 10.9
TOTAL 804 320 591 72.5 99 21.8