Late Quaternary Pollen Records from Oil Lake and Feniak Lake, Alaska, U.S.A.

The pollen analysis of two sediment cores from Oil Lake, in the eastern foothills of the Brooks Range, and Feniak Lake, in the Noatak River drainage, reveal late Wisconsin and Holocene vegetation changes. These cores exhibit alternative trends in the development of the modern tundra biome. At Oil Lake, a long birch/herb zone with little fluctuation is followed by a rapid rise in sedge, which is then followed by a birch zone and an alder zone. There is a drop in birch pollen at the late glacial/Holocene boundary, with a rise in sedge and Nymphaea, an indication of the increase in moisture at the end of the late glacial. Feniak Lake yields a detailed history of Holocene vegetation change that includes an early Alnus pollen rise during the Birch Zone, indicating local expansion of alder in the Noatak River region.

• Publication year

  1992

• Venue

  Arctic and Alpine Research

• Publication date

  1992-02-01

• Fields of study

  Geology, Environmental Science

• Identifiers
  DOI 10.1080/00040851.1992.12002927
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• Feniak Lake preserves an early alder pollen rise that indicates local alder expansion.

  Confidence 0.93

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• Oil Lake shows a late-glacial drop in birch pollen followed by increased sedge and Nymphaea at the late glacial/Holocene boundary, consistent with wetter conditions.

  Confidence 0.97

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• Oil Lake and Feniak Lake show alternative trajectories in the development of the modern tundra biome.

  Confidence 0.94

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review

• alder pollen

  pollen type

  Pollen produced by alder, identified in the record as Alnus pollen.

  Aliases: Alnus pollen

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• birch pollen

  pollen type

  Pollen produced by birch taxa and used as a vegetation indicator in the cores.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• feniak lake

  lake site

  A lake in the Noatak River drainage that provided the other analyzed sediment core.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• late glacial/holocene boundary

  stratigraphic boundary

  The transition interval between the late glacial and Holocene portions of the sediment records.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• modern tundra biome

  biome

  The present-day tundra vegetation regime reconstructed from the lake pollen sequences.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• nymphaea

  plant taxon

  A water-lily genus whose pollen in the cores marks wetter, more open-water conditions.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• oil lake

  lake site

  A lake in the eastern foothills of the Brooks Range that provided one of the analyzed sediment cores.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review
• sedge

  plant taxon

  Sedge vegetation represented in the pollen record, used as an indicator of tundra or wetland conditions.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewq (76h6bfydm6) reviewAK (4715169a40) review

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