Abstract
The paper presents micropaleontological information and observations of the North Pacific diatom species Neodenticula (N.) seminae (Simonsen and Kanaya) Akiba and Yanagisawa in the surface and Holocene sediments from the North Atlantic, Nordic, and Arctic Seas. The compilation of previously published data and new findings of this study on N. seminae in the surface sediments shows its broad occurrence as a usual element of the modern diatom microflora in the Nordic, Labrador, and Irminger Seas. The recent migration of N. seminae from its native area, the Subarctic Pacific, reflects the oceanographic shift in the late 1990s as greater transport of the warmer surface Pacific water to the Arctic causes Arctic sea-ice reduction. Micropaleontological studies of the Holocene sediments document the multiple events of N. seminae appearance in the Arctic during the latest Pleistocene and Holocene warming intervals. These observations can suggest the events of the increased influence of the North Pacific water on the Arctic environments in the past, not just during the recent warm climate amplification.
Highlights
The Arctic Ocean and Subarctic North Atlantic areas have distinctive phytoplankton communities as a part of their marine ecosystems, which are experiencing substantial change related to recent climate warming [1]
One of the examples of marine biological invasions in the Arctic, Nordic, and Labrador Seas is a recent occurrence of the native North Pacific diatom species Neodenticula (N.) seminae (Simonsen and Kanaya) Akiba and Yanagisawa [7,8,9]
Micropaleontological studies have exhibited the events of interactions between the North Pacific and North Atlantic during the Pleistocene, e.g., based on radiolarian data [10,11]
Summary
The Arctic Ocean and Subarctic North Atlantic areas have distinctive phytoplankton communities as a part of their marine ecosystems, which are experiencing substantial change related to recent climate warming [1]. We compiled data on N. seminae distribution in various sampling material and geographical areas: (1) marine plankton from the Northwestern North Atlantic [7,8,14] and Western Arctic Ocean between We compiled data on N. seminae distribution in various sampling material and geographical the Bering Strait and point of 85◦ N in the Arctic Ocean Basin [15]; (2) sediment trap on Station NAP, areas: (1) marine plankton from the Northwestern North Atlantic [7,8,14] and Western Arctic Ocean the Southern Northwind Abyssal Plain in the Western Arctic Ocean [16]; and (3) the Late Pleistocene between the Bering Strait and point of 85°N in the Arctic Ocean Basin [15]; (2) sediment trap on and Holocene sediments from the Arctic Ocean and Nordic and Arctic Seas [17,18,19,20,21,22,23].
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