@article{oai:nipr.repo.nii.ac.jp:00010201,
 author = {Mehlum, Fridtjof and Mehlum, Fridtjof},
 issue = {1},
 journal = {Polar science, Polar science},
 month = {Apr},
 note = {The breeding performance of high-arctic bird populations shows large inter-annual variation that may be attributed to environmental variability, such as the timing of snow melt and break-up of the landfast sea ice that surrounds breeding colonies on islands and along coasts. In the Kongsfjorden area (79°N) on Svalbard, the number of breeding pairs and the average egg clutch size vary considerably among years. In this study, data on breeding performance are presented from 15 years in the period 1981–2000. The results showed that early break-up of sea ice in Kongsfjorden resulted in larger numbers of nests and larger average clutch sizes than late break-up. Also, individual islands with early break-up of sea ice in a particular year had more nests and larger clutch sizes compared to other islands surrounded by sea ice during a longer period in spring. Thus, the inter-annual variation in the break-up of sea ice in the fjord has considerable implications for the inter-annual variability of recruitment to the population. The results indicate that the effects of global warming on changes in the sea ice melting regime in coastal regions are important for the reproductive output of island-nesting eiders., 高緯度北極における海鳥個体群の繁殖行動は海岸や島嶼における繁殖コロニーを取り巻く定着氷域の崩壊や融雪時期の環境変化が原因となって大きな年変動を示した。1981年から2000年までの約15年間に集積されたコングスフィヨルド（79°N）におけるホンケワタガモの繁殖行動データの解析により、営巣数と抱卵サイズは後期の海氷融解よりも初期の融解の方がより大きかった。また、初期に海氷融解を起こした島嶼の営巣数と抱卵サイズは春に長い間、海氷に取り巻かれていた他の島嶼と比較するとより大きかった。フィヨルドの海氷融解に見られるような地球規模での温暖化は陸上で営巣するワタガモの繁殖に影響を及ぼすことが示された。},
 pages = {143--153},
 title = {Effects of sea ice on breeding numbers and clutch size of a high arctic population of the common eider Somateria mollissima},
 volume = {6},
 year = {2012}
}