Evidence from seabird populationsAn

Evidence from seabird populations
An ICES working group on seabird ecology (Anonymous 1998) found significant
correlations, in the 1950s to 1990s data, between the NAO index and breeding
numbers of seabirds on the German Wadden Sea coast. The species involved
were fulmar Fulmarus glacialis, herring gull Larus argentatus, lesser black-backed
gull Larus fuscus, common gull Larus canus, kittiwake Rissa tridactyla, blackheaded
gull Larus ridibundus, Sandwich tern Sterna sandvicensis, guillemot Uria aalge,
and razorbill Alca torda. In the light of evidence of increases in phytoplankton,
zooplankton, benthos, and fish in the North Sea during the positive trend of the
NAO, these results may not be surprising. However, the working group drew
attention to another possible reason for the changes. During the 1960s there was
widespread decline of seabird populations in the Wadden Sea as a result of
contamination with organochlorine pesticides and since that time there has been
a slow recovery. More information is needed to distinguish effects of the NAO
from effects of pollutants.

Hasil (Bahasa Indonesia) 2:

Bukti dari populasi burung laut
An ICES kelompok kerja burung laut ekologi (Anonymous 1998) menemukan signifikan
korelasi, pada 1950-an data 1990, antara indeks NAO dan pemuliaan
jumlah burung laut di pantai Jerman Wadden Sea. Spesies yang terlibat
adalah glacialis Fulmarus Fulmar, herring camar Larus argentatus, lebih rendah hitam-didukung
camar Larus fuscus, camar umum Larus canus, Kittiwake Rissa tridactyla, blackheaded
camar Larus ridibundus, Sandwich tern Sterna sandvicensis, Guillemot Uria aalge,
dan Razorbill Alca Torda. Dalam terang bukti peningkatan fitoplankton,
zooplankton, benthos, dan ikan di Laut Utara selama tren positif dari
NAO, hasil ini mungkin tidak mengejutkan. Namun, kelompok kerja menarik
perhatian alasan lain yang mungkin untuk perubahan. Selama tahun 1960 ada
penurunan luas populasi burung laut di Laut Wadden sebagai akibat dari
kontaminasi dengan pestisida organoklorin dan sejak saat itu telah ada
pemulihan yang lambat. Informasi lebih lanjut diperlukan untuk membedakan efek dari NAO
dari efek polutan.