Low Density of Top Predators (Seabirds and Marine Mammals)‎ in the High Arctic Pack Ice

المؤلفون المشاركون

Joiris, Claude R.
Boos, Karin
D’Hert, Diederik
Nachtsheim, Dominik A.

المصدر

Scientifica

العدد

المجلد 2016، العدد 2016 (31 ديسمبر/كانون الأول 2016)، ص ص. 1-14، 14ص.

الناشر

Hindawi Publishing Corporation

تاريخ النشر

2016-09-29

دولة النشر

مصر

عدد الصفحات

14

التخصصات الرئيسية

الأمراض

الملخص EN

The at-sea distribution of top predators, seabirds and marine mammals, was determined in the high Arctic pack ice on board the icebreaker RV Polarstern in July to September 2014.

In total, 1,620 transect counts were realised, lasting 30 min each.

The five most numerous seabird species represented 74% of the total of 15,150 individuals registered: kittiwake Rissa tridactyla, fulmar Fulmarus glacialis, puffin Fratercula arctica, Ross’s gull Rhodostethia rosea, and little auk Alle alle.

Eight cetacean species were tallied for a total of 330 individuals, mainly white-beaked dolphin Lagenorhynchus albirostris and fin whale Balaenoptera physalus.

Five pinniped species were represented by a total of 55 individuals and the polar bear Ursus maritimus was represented by 12 individuals.

Four main geographical zones were identified: from Tromsø to the outer marginal ice zone (OMIZ), the Arctic pack ice (close pack ice, CPI), the end of Lomonosov Ridge off Siberia, and the route off Siberia and northern Norway.

Important differences were detected between zones, both in species composition and in individual abundance.

Low numbers of species and high proportion of individuals for some of them can be considered to reflect very low biodiversity.

Numbers encountered in zones 2 to 4 were very low in comparison with other European Arctic seas.

The observed differences showed strong patterns.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Joiris, Claude R.& Boos, Karin& D’Hert, Diederik& Nachtsheim, Dominik A.. 2016. Low Density of Top Predators (Seabirds and Marine Mammals) in the High Arctic Pack Ice. Scientifica،Vol. 2016, no. 2016, pp.1-14.
https://search.emarefa.net/detail/BIM-1117563

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Joiris, Claude R.…[et al.]. Low Density of Top Predators (Seabirds and Marine Mammals) in the High Arctic Pack Ice. Scientifica No. 2016 (2016), pp.1-14.
https://search.emarefa.net/detail/BIM-1117563

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Joiris, Claude R.& Boos, Karin& D’Hert, Diederik& Nachtsheim, Dominik A.. Low Density of Top Predators (Seabirds and Marine Mammals) in the High Arctic Pack Ice. Scientifica. 2016. Vol. 2016, no. 2016, pp.1-14.
https://search.emarefa.net/detail/BIM-1117563

نوع البيانات

مقالات

لغة النص

الإنجليزية

الملاحظات

Includes bibliographical references

رقم السجل

BIM-1117563