Millimetre‐scale pollen analysis of non‐varved lacustrine sediments from Onepoto maar palaeolake, Auckland, reveals distal vegetation responses and landscape recovery following the ~25.5‐ka Ōruanui supereruption, New Zealand
ABSTRACT The ~25.5‐ka Ōruanui supereruption (Taupō volcano, New Zealand) erupted >1100 km3 of pyroclastic material during the Last Glacial Maximum. The impacts of this event on climate and the New Zealand environment remain unresolved, particularly on ecological timescales. Using sediment cores f...
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| Veröffentlicht in: | Journal of quaternary science 2023-07, Vol.38 (5), p.613-628 |
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| creator | Piva, Stephen B. Barker, Simon J. Newnham, Rewi M. Rees, Andrew B. H. Wilson, Colin J. N. Carter, Lionel Iverson, Nels A. Läuchli, Benjamin Augustinus, Paul C. |
| description | ABSTRACT
The ~25.5‐ka Ōruanui supereruption (Taupō volcano, New Zealand) erupted >1100 km3 of pyroclastic material during the Last Glacial Maximum. The impacts of this event on climate and the New Zealand environment remain unresolved, particularly on ecological timescales. Using sediment cores from Onepoto maar palaeolake, Auckland (~240 km upwind from source), we have analysed pollen assemblages at contiguous 1‐mm intervals, around an intact 3‐cm layer of the Kawakawa‐Ōruanui Tephra to resolve and assess post‐eruption vegetation impacts and landscape recovery. Sediments immediately above the tephra record a decline in the relative abundance of the dominant canopy species of Fuscospora, and concurrent increase in the abundances of grasses, herbs, ferns and shrubs. These changes reflect a brief ( |
| doi_str_mv | 10.1002/jqs.3506 |
| format | Article |
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The ~25.5‐ka Ōruanui supereruption (Taupō volcano, New Zealand) erupted >1100 km3 of pyroclastic material during the Last Glacial Maximum. The impacts of this event on climate and the New Zealand environment remain unresolved, particularly on ecological timescales. Using sediment cores from Onepoto maar palaeolake, Auckland (~240 km upwind from source), we have analysed pollen assemblages at contiguous 1‐mm intervals, around an intact 3‐cm layer of the Kawakawa‐Ōruanui Tephra to resolve and assess post‐eruption vegetation impacts and landscape recovery. Sediments immediately above the tephra record a decline in the relative abundance of the dominant canopy species of Fuscospora, and concurrent increase in the abundances of grasses, herbs, ferns and shrubs. These changes reflect a brief (<10 years) part‐defoliation of canopy trees, permitting more light to penetrate and to encourage sub‐canopy vegetation growth. A short‐lived volcanogenic cooling inferred from Antarctic ice core records may have contributed to the changes but cannot be separated from the immediate and direct ecological impacts of ashfall on vegetation following the eruption. Our results, here applied to the world's most recent supereruption, more generally demonstrate the value of millimetre‐scale stratigraphic pollen analysis from non‐varved lacustrine sediments as a tool for assessing past eruptive impacts on sub‐decadal timescales.</description><identifier>ISSN: 0267-8179</identifier><identifier>EISSN: 1099-1417</identifier><identifier>DOI: 10.1002/jqs.3506</identifier><language>eng</language><publisher>Chichester: Wiley Subscription Services, Inc</publisher><subject>Antarctic ice ; Auckland maar lakes ; Canopies ; Cores ; Defoliation ; Ecological effects ; Eruptions ; Ferns ; Grasses ; Ice cores ; Lacustrine sediments ; Landscape ; Last Glacial Maximum ; Paleolakes ; Pollen ; Pollen analysis ; Recovery ; Relative abundance ; Sediments ; Shrubs ; Stratigraphy ; Vegetation ; vegetation dynamics ; Vegetation growth ; volcanic disturbance ; Volcanoes ; Ōruanui supereruption</subject><ispartof>Journal of quaternary science, 2023-07, Vol.38 (5), p.613-628</ispartof><rights>2023 Victoria University of Wellington. published by John Wiley & Sons Ltd on behalf of Quaternary Research Association.</rights><rights>2023. This article is published under http://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c2886-968fa76044114bf3099e4e5cf5140a0142cbf01d7414d518159963192f87d8c83</cites><orcidid>0000-0002-3090-1403 ; 0000-0002-1391-2151 ; 0000-0002-6044-8945 ; 0000-0003-4026-7765 ; 0000-0002-7502-9452 ; 0000-0002-7110-5040 ; 0000-0001-7565-0743 ; 0000-0003-4346-2048</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fjqs.3506$$EPDF$$P50$$Gwiley$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fjqs.3506$$EHTML$$P50$$Gwiley$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids></links><search><creatorcontrib>Piva, Stephen B.</creatorcontrib><creatorcontrib>Barker, Simon J.</creatorcontrib><creatorcontrib>Newnham, Rewi M.</creatorcontrib><creatorcontrib>Rees, Andrew B. H.</creatorcontrib><creatorcontrib>Wilson, Colin J. N.</creatorcontrib><creatorcontrib>Carter, Lionel</creatorcontrib><creatorcontrib>Iverson, Nels A.</creatorcontrib><creatorcontrib>Läuchli, Benjamin</creatorcontrib><creatorcontrib>Augustinus, Paul C.</creatorcontrib><title>Millimetre‐scale pollen analysis of non‐varved lacustrine sediments from Onepoto maar palaeolake, Auckland, reveals distal vegetation responses and landscape recovery following the ~25.5‐ka Ōruanui supereruption, New Zealand</title><title>Journal of quaternary science</title><description>ABSTRACT
The ~25.5‐ka Ōruanui supereruption (Taupō volcano, New Zealand) erupted >1100 km3 of pyroclastic material during the Last Glacial Maximum. The impacts of this event on climate and the New Zealand environment remain unresolved, particularly on ecological timescales. Using sediment cores from Onepoto maar palaeolake, Auckland (~240 km upwind from source), we have analysed pollen assemblages at contiguous 1‐mm intervals, around an intact 3‐cm layer of the Kawakawa‐Ōruanui Tephra to resolve and assess post‐eruption vegetation impacts and landscape recovery. Sediments immediately above the tephra record a decline in the relative abundance of the dominant canopy species of Fuscospora, and concurrent increase in the abundances of grasses, herbs, ferns and shrubs. These changes reflect a brief (<10 years) part‐defoliation of canopy trees, permitting more light to penetrate and to encourage sub‐canopy vegetation growth. A short‐lived volcanogenic cooling inferred from Antarctic ice core records may have contributed to the changes but cannot be separated from the immediate and direct ecological impacts of ashfall on vegetation following the eruption. Our results, here applied to the world's most recent supereruption, more generally demonstrate the value of millimetre‐scale stratigraphic pollen analysis from non‐varved lacustrine sediments as a tool for assessing past eruptive impacts on sub‐decadal timescales.</description><subject>Antarctic ice</subject><subject>Auckland maar lakes</subject><subject>Canopies</subject><subject>Cores</subject><subject>Defoliation</subject><subject>Ecological effects</subject><subject>Eruptions</subject><subject>Ferns</subject><subject>Grasses</subject><subject>Ice cores</subject><subject>Lacustrine sediments</subject><subject>Landscape</subject><subject>Last Glacial Maximum</subject><subject>Paleolakes</subject><subject>Pollen</subject><subject>Pollen analysis</subject><subject>Recovery</subject><subject>Relative abundance</subject><subject>Sediments</subject><subject>Shrubs</subject><subject>Stratigraphy</subject><subject>Vegetation</subject><subject>vegetation dynamics</subject><subject>Vegetation growth</subject><subject>volcanic disturbance</subject><subject>Volcanoes</subject><subject>Ōruanui supereruption</subject><issn>0267-8179</issn><issn>1099-1417</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><recordid>eNp1UUuO1DAUjBBINAMSR3gSGxadxk6c33I04quBEQI2bKI3yfPgbred8UvS6g3iACy4FBdhwzVwaLasLLnqVZWqkuSxFBspRPZse8ubvBDlnWQlRdOkUsnqbrISWVmltaya-8kD5q0QESvFKvn91lhr9jQG-vXtB3doCQZvLTlAh_bIhsFrcN5FeMYwUw8Wu4nHYBwBUx-P3cigg9_DlaPBjx72iAEGtEje4o7WcD51O4uuX0OgmdAy9IZHtDDTDY04Gu8iwoN3TBydFxPXxzgDxf_OzxSOoGMufzDuBsYvBF-zYlPEUDuEn9_DhG4ywNNAgcI0LIJreEcH-BzdotTD5J6OtvTo33uWfHrx_OPFq_Ty6uXri_PLtMvqukybstZYlUIpKdW1zmNLpKjodCGVQCFV1l1rIftKSdUXspZFrDGXTabrqq-7Oj9Lnpx0h-BvJ-Kx3fopxCa5zeo8q5pcNQvr6YnVBc8cSLdDMHsMx1aKdpmxjTO2y4yRmp6oB2Pp-F9e--b9h7_8P8cEpzc</recordid><startdate>202307</startdate><enddate>202307</enddate><creator>Piva, Stephen B.</creator><creator>Barker, Simon J.</creator><creator>Newnham, Rewi M.</creator><creator>Rees, Andrew B. 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The ~25.5‐ka Ōruanui supereruption (Taupō volcano, New Zealand) erupted >1100 km3 of pyroclastic material during the Last Glacial Maximum. The impacts of this event on climate and the New Zealand environment remain unresolved, particularly on ecological timescales. Using sediment cores from Onepoto maar palaeolake, Auckland (~240 km upwind from source), we have analysed pollen assemblages at contiguous 1‐mm intervals, around an intact 3‐cm layer of the Kawakawa‐Ōruanui Tephra to resolve and assess post‐eruption vegetation impacts and landscape recovery. Sediments immediately above the tephra record a decline in the relative abundance of the dominant canopy species of Fuscospora, and concurrent increase in the abundances of grasses, herbs, ferns and shrubs. These changes reflect a brief (<10 years) part‐defoliation of canopy trees, permitting more light to penetrate and to encourage sub‐canopy vegetation growth. A short‐lived volcanogenic cooling inferred from Antarctic ice core records may have contributed to the changes but cannot be separated from the immediate and direct ecological impacts of ashfall on vegetation following the eruption. Our results, here applied to the world's most recent supereruption, more generally demonstrate the value of millimetre‐scale stratigraphic pollen analysis from non‐varved lacustrine sediments as a tool for assessing past eruptive impacts on sub‐decadal timescales.</abstract><cop>Chichester</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/jqs.3506</doi><tpages>16</tpages><orcidid>https://orcid.org/0000-0002-3090-1403</orcidid><orcidid>https://orcid.org/0000-0002-1391-2151</orcidid><orcidid>https://orcid.org/0000-0002-6044-8945</orcidid><orcidid>https://orcid.org/0000-0003-4026-7765</orcidid><orcidid>https://orcid.org/0000-0002-7502-9452</orcidid><orcidid>https://orcid.org/0000-0002-7110-5040</orcidid><orcidid>https://orcid.org/0000-0001-7565-0743</orcidid><orcidid>https://orcid.org/0000-0003-4346-2048</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Antarctic ice Auckland maar lakes Canopies Cores Defoliation Ecological effects Eruptions Ferns Grasses Ice cores Lacustrine sediments Landscape Last Glacial Maximum Paleolakes Pollen Pollen analysis Recovery Relative abundance Sediments Shrubs Stratigraphy Vegetation vegetation dynamics Vegetation growth volcanic disturbance Volcanoes Ōruanui supereruption |
| title | Millimetre‐scale pollen analysis of non‐varved lacustrine sediments from Onepoto maar palaeolake, Auckland, reveals distal vegetation responses and landscape recovery following the ~25.5‐ka Ōruanui supereruption, New Zealand |
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