Robert M Kooyman1, Peter Wilf2, Viviana D Barreda3, Raymond J Carpenter4, Gregory J Jordan5, J M Kale Sniderman6, Andrew Allen7, Timothy J Brodribb5, Darren Crayn8, Taylor S Feild8, Shawn W Laffan9, Christopher H Lusk10, Maurizio Rossetto11, Peter H Weston11. 1. Department of Biological Sciences, Macquarie University, North Ryde 2113, Sydney, Australia National Herbarium of NSW, Royal Botanic Gardens and Domain Trust, Mrs Macquaries Road, Sydney 2000, Australia. 2. Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA. 3. Museo Argentino de Ciencias Naturales, CONICET, División Paleobotánica, Av. Ángel Gallardo 470, C1405DJR Buenos Aires, Argentina. 4. School of Earth and Environmental Sciences, Benham Bldg DX 650 312, University of Adelaide, South Australia, Australia. 5. School of Biological Sciences, University of Tasmania, Private Bag 55 Hobart, 7001 Tasmania, Australia. 6. School of Earth Sciences, University of Melbourne, Melbourne 3010, Australia. 7. Department of Biological Sciences, Macquarie University, North Ryde 2113, Sydney, Australia. 8. Australian Tropical Herbarium, School of Marine and Tropical Biology, James Cook University, Cairns, Australia. 9. Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, University of New South Wales, Kensington 2052, Sydney, Australia. 10. School of Science, University of Waikato, Private Bag 3105, Hamilton, New Zealand. 11. National Herbarium of NSW, Royal Botanic Gardens and Domain Trust, Mrs Macquaries Road, Sydney 2000, Australia.
Abstract
UNLABELLED: • PREMISE OF STUDY: Have Gondwanan rainforest floral associations survived? Where do they occur today? Have they survived continuously in particular locations? How significant is their living floristic signal? We revisit these classic questions in light of significant recent increases in relevant paleobotanical data.• METHODS: We traced the extinction and persistence of lineages and associations through the past across four now separated regions-Australia, New Zealand, Patagonia, and Antarctica-using fossil occurrence data from 63 well-dated Gondwanan rainforest sites and 396 constituent taxa. Fossil sites were allocated to four age groups: Cretaceous, Paleocene-Eocene, Neogene plus Oligocene, and Pleistocene. We compared the modern and ancient distributions of lineages represented in the fossil record to see if dissimilarity increased with time. We quantified similarity-dissimilarity of composition and taxonomic structure among fossil assemblages, and between fossil and modern assemblages.• KEY RESULTS: Strong similarities between ancient Patagonia and Australia confirmed shared Gondwanan rainforest history, but more of the lineages persisted in Australia. Samples of ancient Australia grouped with the extant floras of Australia, New Guinea, New Caledonia, Fiji, and Mt. Kinabalu. Decreasing similarity through time among the regional floras of Antarctica, Patagonia, New Zealand, and southern Australia reflects multiple extinction events.• CONCLUSIONS: Gondwanan rainforest lineages contribute significantly to modern rainforest community assembly and often co-occur in widely separated assemblages far from their early fossil records. Understanding how and where lineages from ancient Gondwanan assemblages co-occur today has implications for the conservation of global rainforest vegetation, including in the Old World tropics.
UNLABELLED: • PREMISE OF STUDY: Have Gondwanan rainforest floral associations survived? Where do they occur today? Have they survived continuously in particular locations? How significant is their living floristic signal? We revisit these classic questions in light of significant recent increases in relevant paleobotanical data.• METHODS: We traced the extinction and persistence of lineages and associations through the past across four now separated regions-Australia, New Zealand, Patagonia, and Antarctica-using fossil occurrence data from 63 well-dated Gondwanan rainforest sites and 396 constituent taxa. Fossil sites were allocated to four age groups: Cretaceous, Paleocene-Eocene, Neogene plus Oligocene, and Pleistocene. We compared the modern and ancient distributions of lineages represented in the fossil record to see if dissimilarity increased with time. We quantified similarity-dissimilarity of composition and taxonomic structure among fossil assemblages, and between fossil and modern assemblages.• KEY RESULTS: Strong similarities between ancient Patagonia and Australia confirmed shared Gondwanan rainforest history, but more of the lineages persisted in Australia. Samples of ancient Australia grouped with the extant floras of Australia, New Guinea, New Caledonia, Fiji, and Mt. Kinabalu. Decreasing similarity through time among the regional floras of Antarctica, Patagonia, New Zealand, and southern Australia reflects multiple extinction events.• CONCLUSIONS: Gondwanan rainforest lineages contribute significantly to modern rainforest community assembly and often co-occur in widely separated assemblages far from their early fossil records. Understanding how and where lineages from ancient Gondwanan assemblages co-occur today has implications for the conservation of global rainforest vegetation, including in the Old World tropics.
Authors: Peter Wilf; Xiaoyu Zou; Michael P Donovan; László Kocsis; Antonino Briguglio; David Shaw; Jw Ferry Slik; Joseph J Lambiase Journal: PeerJ Date: 2022-03-24 Impact factor: 2.984
Authors: Joeri S Strijk; Hoàng Thi Binh; Nguyen Van Ngoc; Joan T Pereira; J W Ferry Slik; Rahayu S Sukri; Yoshihisa Suyama; Shuichiro Tagane; Jan J Wieringa; Tetsukazu Yahara; Damien D Hinsinger Journal: PLoS One Date: 2020-05-22 Impact factor: 3.240
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