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Title: Genomic reconstruction of 100 000-year grassland history in a forested country: population dynamics of specialist forbs
Authors: Yamaura, Yuichi
Narita, Ayu
Kusumoto, Yoshinobu
Nagano, Atsushi J.
Tezuka, Ayumi
Okamoto, Toru
Takahara, Hikaru
Nakamura, Futoshi
Isagi, Yuji
Lindenmayer, David
Author's alias: 山浦, 悠一
成田, あゆ
楠本, 良延
永野, 惇
手塚, あゆみ
岡本, 透
高原, 光
中村, 太士
井鷺, 裕司
Keywords: Anthropocene
human disturbance
last glacial maximum
site frequencyspectrum
Issue Date: 1-May-2019
Publisher: The Royal Society
Journal title: Biology Letters
Volume: 15
Issue: 5
Thesis number: 20180577
Abstract: Grassland ecosystems worldwide have been extensively converted to other land uses and are globally imperiled. Because many grasslands have been maintained by human activities, understanding their origin and history is fundamentally important to better contemporary management. However, existing methods to reconstruct past vegetation can produce contrasting views on grassland history. Here, we inferred demographic histories of 40 populations of four grassland forb species throughout Japan using high-resolution genome sequences and model-flexible demographic simulation based on the site frequency spectrum. Although two species showed a slight decline in population size between 100 000-10 000 years ago, our results suggest that population sizes of studied species have been maintained within the range of 0.5-2.0 times the most recent estimates for at least 100 000 years across Japan. Our results suggest that greater than 90% declines in Japanese grasslands and subsequent losses of grassland species in the last 100 years are geologically and biologically important and will have substantial consequences for Japanese biota and culture. People have had critical roles in maintaining disturbance-dependent grassland ecosystems and biota in this warm and wet forested country. In these contexts, disturbances associated with forest harvesting and traditional extensive farming have the potential to maintain grassland ecosystems and can provide important opportunities to reconcile resource production and conservation of grassland biodiversity.
Description: 日本で草地が10万年以上維持されてきたことを実証 --近年の草地の激減は地質学的時間スケールで大きな出来事--. 京都大学プレスリリース. 2019-05-30.
Rights: © 2019 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License, which permits unrestricted use, provided the original author and source are credited.
DOI(Published Version): 10.1098/rsbl.2018.0577
PubMed ID: 31138096
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