现代土地利用的变化推动了波罗的海沿岸地区营养循环和硅藻群的变化:瑞典东海岸 Gamlebyviken 案例研究的千年视角

IF 3.2 1区 地球科学 Q1 GEOGRAPHY, PHYSICAL
Elinor Andrén , Olena Vinogradova , Mikael Lönn , Simon Belle , Martin Dahl , Veronica Palm , Christos Katrantsiotis , Anne Birgitte Nielsen , Martin Jakobsson , Johan Rönnby , Thomas Andrén
{"title":"现代土地利用的变化推动了波罗的海沿岸地区营养循环和硅藻群的变化:瑞典东海岸 Gamlebyviken 案例研究的千年视角","authors":"Elinor Andrén ,&nbsp;Olena Vinogradova ,&nbsp;Mikael Lönn ,&nbsp;Simon Belle ,&nbsp;Martin Dahl ,&nbsp;Veronica Palm ,&nbsp;Christos Katrantsiotis ,&nbsp;Anne Birgitte Nielsen ,&nbsp;Martin Jakobsson ,&nbsp;Johan Rönnby ,&nbsp;Thomas Andrén","doi":"10.1016/j.quascirev.2024.109058","DOIUrl":null,"url":null,"abstract":"<div><div>This study aims to investigate and disentangle the impact of land use and climate variability on the Baltic Sea coastal zone from a millennial perspective. To assess the environmental status of the coastal zone we make use of siliceous microfossils (mainly diatoms), stable nitrogen and carbon isotopes, organic carbon accumulation rates, and lithological changes analyzed in a sediment core collected in Gamlebyviken, Swedish east coast, dated to cover the last 3000 years. Changes in land use and vegetation cover are modelled using pollen stratigraphical data to obtain the percentage coverage of coniferous woodland (<em>Pinus</em> and <em>Picea</em>), deciduous woodland, wetland (Cyperaceae), grassland (including <em>Juniperus</em>) and cropland (cereals) while changes in climatic conditions are assessed through well-documented climatic periods that have occurred in the Baltic Sea region.</div><div>The reconstructed regional vegetation cover shows that already 3000 years ago, humans used the landscape for both animal husbandry (grasslands) and farming (cropland), but the impact on the Baltic coastal waters was minor. The diatom accumulation rates were quite high (∼3100–2600 cal yr BP) containing taxa indicative of high nutrient conditions/upwelling, and stable carbon isotopes show that the carbon was produced in the basin but did not result in elevated organic carbon accumulation rates. A gradual change to less marine conditions in Gamlebyviken from about 2500 to 1400 cal yr BP can be attributed to the ongoing land uplift which resulted in a more enclosed embayment with only a narrow inlet area today.</div><div>The Medieval Climate Anomaly (1000–700 cal yr BP/950–1250 CE) is a time where extensive eutrophication is registered in the open Baltic Sea, but afforestation is recorded between 1000 and 500 cal yr BP and attributed to the expansion of spruce favored by land-use reorganization with a transition from a one-course rotation system to the three-course rotation system fully established in southern Sweden in the 13th century, and only minor environmental change is recorded in the coastal zone.</div><div>The Little Ice Age is documented in our data between 400 and 250 cal yr BP/1550–1700 CE as a decrease in regional cropland (cereals) cover, possibly indicating years of poor crop harvest, and changes in the Baltic coastal zone are evidenced as low carbon and diatom accumulation rates, increase in benthic diatom taxa (low turbidity), and high abundance in diatom taxa associated with sea ice indicating a cold climate.</div><div>The most significant changes occurred from about 100 cal yr BP/1850 CE up to present, with a maximum regional cover of grassland and cropland (ca. 35%) at the expense of deciduous woodland, and major changes indicative of a highly eutrophic environment recorded in the coastal zone. Organic carbon accumulation rates peaked in 1968 CE at approximately 134 g C m<sup>2</sup> yr<sup>−1</sup> before subsequently declining to present-day values of 53 g C m<sup>2</sup> yr<sup>−1</sup>, mirroring a similar trend observed in diatom accumulation rates. The high organic carbon accumulation rate shows that deep unvegetated accumulation bottoms in the coastal Baltic Sea serve as carbon sinks and are worth exploring for their potential in mitigating climate change.</div><div>Variation partitioning shows that 26% of the variance in the diatom assemblages is associated with land use changes. The variables grassland, cropland, and stable nitrogen isotopes are accordingly strong predictors of environmental change in the Baltic coastal zone as reflected by the diatom assemblages.</div></div>","PeriodicalId":20926,"journal":{"name":"Quaternary Science Reviews","volume":"346 ","pages":"Article 109058"},"PeriodicalIF":3.2000,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Modern land use changes drive shifts in nutrient cycling and diatom assemblages in the Baltic Sea coastal zone: A millennial perspective with a case study from Gamlebyviken, Swedish east coast\",\"authors\":\"Elinor Andrén ,&nbsp;Olena Vinogradova ,&nbsp;Mikael Lönn ,&nbsp;Simon Belle ,&nbsp;Martin Dahl ,&nbsp;Veronica Palm ,&nbsp;Christos Katrantsiotis ,&nbsp;Anne Birgitte Nielsen ,&nbsp;Martin Jakobsson ,&nbsp;Johan Rönnby ,&nbsp;Thomas Andrén\",\"doi\":\"10.1016/j.quascirev.2024.109058\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study aims to investigate and disentangle the impact of land use and climate variability on the Baltic Sea coastal zone from a millennial perspective. To assess the environmental status of the coastal zone we make use of siliceous microfossils (mainly diatoms), stable nitrogen and carbon isotopes, organic carbon accumulation rates, and lithological changes analyzed in a sediment core collected in Gamlebyviken, Swedish east coast, dated to cover the last 3000 years. Changes in land use and vegetation cover are modelled using pollen stratigraphical data to obtain the percentage coverage of coniferous woodland (<em>Pinus</em> and <em>Picea</em>), deciduous woodland, wetland (Cyperaceae), grassland (including <em>Juniperus</em>) and cropland (cereals) while changes in climatic conditions are assessed through well-documented climatic periods that have occurred in the Baltic Sea region.</div><div>The reconstructed regional vegetation cover shows that already 3000 years ago, humans used the landscape for both animal husbandry (grasslands) and farming (cropland), but the impact on the Baltic coastal waters was minor. The diatom accumulation rates were quite high (∼3100–2600 cal yr BP) containing taxa indicative of high nutrient conditions/upwelling, and stable carbon isotopes show that the carbon was produced in the basin but did not result in elevated organic carbon accumulation rates. A gradual change to less marine conditions in Gamlebyviken from about 2500 to 1400 cal yr BP can be attributed to the ongoing land uplift which resulted in a more enclosed embayment with only a narrow inlet area today.</div><div>The Medieval Climate Anomaly (1000–700 cal yr BP/950–1250 CE) is a time where extensive eutrophication is registered in the open Baltic Sea, but afforestation is recorded between 1000 and 500 cal yr BP and attributed to the expansion of spruce favored by land-use reorganization with a transition from a one-course rotation system to the three-course rotation system fully established in southern Sweden in the 13th century, and only minor environmental change is recorded in the coastal zone.</div><div>The Little Ice Age is documented in our data between 400 and 250 cal yr BP/1550–1700 CE as a decrease in regional cropland (cereals) cover, possibly indicating years of poor crop harvest, and changes in the Baltic coastal zone are evidenced as low carbon and diatom accumulation rates, increase in benthic diatom taxa (low turbidity), and high abundance in diatom taxa associated with sea ice indicating a cold climate.</div><div>The most significant changes occurred from about 100 cal yr BP/1850 CE up to present, with a maximum regional cover of grassland and cropland (ca. 35%) at the expense of deciduous woodland, and major changes indicative of a highly eutrophic environment recorded in the coastal zone. Organic carbon accumulation rates peaked in 1968 CE at approximately 134 g C m<sup>2</sup> yr<sup>−1</sup> before subsequently declining to present-day values of 53 g C m<sup>2</sup> yr<sup>−1</sup>, mirroring a similar trend observed in diatom accumulation rates. The high organic carbon accumulation rate shows that deep unvegetated accumulation bottoms in the coastal Baltic Sea serve as carbon sinks and are worth exploring for their potential in mitigating climate change.</div><div>Variation partitioning shows that 26% of the variance in the diatom assemblages is associated with land use changes. The variables grassland, cropland, and stable nitrogen isotopes are accordingly strong predictors of environmental change in the Baltic coastal zone as reflected by the diatom assemblages.</div></div>\",\"PeriodicalId\":20926,\"journal\":{\"name\":\"Quaternary Science Reviews\",\"volume\":\"346 \",\"pages\":\"Article 109058\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2024-11-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Quaternary Science Reviews\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0277379124005602\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOGRAPHY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Quaternary Science Reviews","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0277379124005602","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}
引用次数: 0

摘要

这项研究旨在从千年的角度调查和厘清土地利用和气候变异对波罗的海沿岸带的影响。为了评估海岸带的环境状况,我们利用硅质微化石(主要是硅藻)、稳定的氮和碳同位素、有机碳累积率,以及在瑞典东海岸 Gamlebyviken 采集的沉积物岩芯中分析的岩性变化,其年代涵盖了过去 3000 年。利用花粉地层数据对土地利用和植被覆盖的变化进行建模,以获得针叶林地(松树和杉树)、落叶林地、湿地(桧柏科)、草地(包括桧柏)和耕地(谷物)的覆盖率,同时通过波罗的海地区有据可查的气候时期对气候条件的变化进行评估。重建的区域植被覆盖显示,早在 3000 年前,人类就已经将这片土地用于畜牧业(草原)和农业(耕地),但对波罗的海沿岸水域的影响很小。硅藻的积累率相当高(3100-2600 卡年 BP),其中含有表明高营养条件/上涌的类群,稳定碳同位素表明碳是在盆地中产生的,但并没有导致有机碳积累率的升高。大约公元前 2500 年至公元前 1400 年期间,甘勒比维肯的海洋条件逐渐减弱,这可能是由于持续的陆地隆起造成了一个更加封闭的海湾,如今只有一个狭窄的入口区。中世纪气候异常时期(公元前 1000-700 卡/公元前 950-1250 年),波罗的海开阔海域出现了大面积富营养化,但公元前 1000-500 卡之间有植树造林的记录,这归因于土地利用重组带来的云杉扩张,瑞典南部从 13 世纪开始全面推行一轮耕制向三轮耕制过渡,沿海地区的环境变化很小。波罗的海沿岸带的变化表现为碳和硅藻的低积累率、底栖硅藻类群的增加(低浊度)以及与海冰有关的硅藻类群的高丰度,表明气候寒冷。最重要的变化发生在大约公元前 100 年/公元前 1850 年至今,草地和耕地的区域覆盖率最高(约 35%),落叶林地的覆盖率下降,沿海地区发生了重大变化,表明环境高度富营养化。有机碳累积率在西元 1968 年达到峰值,约为 134 克 C m2 yr-1,随后下降到目前的 53 克 C m2 yr-1,与硅藻累积率的变化趋势相似。高有机碳积累率表明,波罗的海沿岸未植被的深层积底是碳汇,值得探索其在减缓气候变化方面的潜力。因此,草地、耕地和稳定氮同位素等变量是硅藻群所反映的波罗的海沿岸地区环境变化的有力预测因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modern land use changes drive shifts in nutrient cycling and diatom assemblages in the Baltic Sea coastal zone: A millennial perspective with a case study from Gamlebyviken, Swedish east coast
This study aims to investigate and disentangle the impact of land use and climate variability on the Baltic Sea coastal zone from a millennial perspective. To assess the environmental status of the coastal zone we make use of siliceous microfossils (mainly diatoms), stable nitrogen and carbon isotopes, organic carbon accumulation rates, and lithological changes analyzed in a sediment core collected in Gamlebyviken, Swedish east coast, dated to cover the last 3000 years. Changes in land use and vegetation cover are modelled using pollen stratigraphical data to obtain the percentage coverage of coniferous woodland (Pinus and Picea), deciduous woodland, wetland (Cyperaceae), grassland (including Juniperus) and cropland (cereals) while changes in climatic conditions are assessed through well-documented climatic periods that have occurred in the Baltic Sea region.
The reconstructed regional vegetation cover shows that already 3000 years ago, humans used the landscape for both animal husbandry (grasslands) and farming (cropland), but the impact on the Baltic coastal waters was minor. The diatom accumulation rates were quite high (∼3100–2600 cal yr BP) containing taxa indicative of high nutrient conditions/upwelling, and stable carbon isotopes show that the carbon was produced in the basin but did not result in elevated organic carbon accumulation rates. A gradual change to less marine conditions in Gamlebyviken from about 2500 to 1400 cal yr BP can be attributed to the ongoing land uplift which resulted in a more enclosed embayment with only a narrow inlet area today.
The Medieval Climate Anomaly (1000–700 cal yr BP/950–1250 CE) is a time where extensive eutrophication is registered in the open Baltic Sea, but afforestation is recorded between 1000 and 500 cal yr BP and attributed to the expansion of spruce favored by land-use reorganization with a transition from a one-course rotation system to the three-course rotation system fully established in southern Sweden in the 13th century, and only minor environmental change is recorded in the coastal zone.
The Little Ice Age is documented in our data between 400 and 250 cal yr BP/1550–1700 CE as a decrease in regional cropland (cereals) cover, possibly indicating years of poor crop harvest, and changes in the Baltic coastal zone are evidenced as low carbon and diatom accumulation rates, increase in benthic diatom taxa (low turbidity), and high abundance in diatom taxa associated with sea ice indicating a cold climate.
The most significant changes occurred from about 100 cal yr BP/1850 CE up to present, with a maximum regional cover of grassland and cropland (ca. 35%) at the expense of deciduous woodland, and major changes indicative of a highly eutrophic environment recorded in the coastal zone. Organic carbon accumulation rates peaked in 1968 CE at approximately 134 g C m2 yr−1 before subsequently declining to present-day values of 53 g C m2 yr−1, mirroring a similar trend observed in diatom accumulation rates. The high organic carbon accumulation rate shows that deep unvegetated accumulation bottoms in the coastal Baltic Sea serve as carbon sinks and are worth exploring for their potential in mitigating climate change.
Variation partitioning shows that 26% of the variance in the diatom assemblages is associated with land use changes. The variables grassland, cropland, and stable nitrogen isotopes are accordingly strong predictors of environmental change in the Baltic coastal zone as reflected by the diatom assemblages.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Quaternary Science Reviews
Quaternary Science Reviews 地学-地球科学综合
CiteScore
7.50
自引率
15.00%
发文量
388
审稿时长
3 months
期刊介绍: Quaternary Science Reviews caters for all aspects of Quaternary science, and includes, for example, geology, geomorphology, geography, archaeology, soil science, palaeobotany, palaeontology, palaeoclimatology and the full range of applicable dating methods. The dividing line between what constitutes the review paper and one which contains new original data is not easy to establish, so QSR also publishes papers with new data especially if these perform a review function. All the Quaternary sciences are changing rapidly and subject to re-evaluation as the pace of discovery quickens; thus the diverse but comprehensive role of Quaternary Science Reviews keeps readers abreast of the wider issues relating to new developments in the field.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信