Climate change and phenological responses of two seabird species breeding in the high-Arctic - Moe, Børge; Stempniewicz, Lech; Jakubas, Dariusz; Angelier, Frédéric; Chastel, Olivier; Dinessen, Frode; Gabrielsen, Geir Wing; Hanssen, Frank; Karnovsky, Nina; Rønning, Bernt; Welcker, Jorg; Wojczulanis-Jakubas, Katarzyna; et al. (Inter-Research, 2009)