A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard

Voldstad, Linn H.; Alsos, Inger Greve; Farnsworth, Wesley R.; Heintzman, Peter D.; Håkansson, Lena; Kjellman, Sofia E.; Rouillard, Alexandra; Schomacker, Anders; Eidesen, Pernille Bronken

doi:10.1016/j.quascirev.2020.106207

Cited by 52 publications

(64 citation statements)

References 68 publications

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“…DNA-based studies of past vegetation have mainly focused on arctic, boreal, and alpine regions because of their high sensitivity to climate change, providing new insights on past vegetation dynamics and species distributions e.g., [16,26,27,[43][44][45][46][47][48][49]. At high-latitude regions, sedaDNA has for example contributed to increased knowledge on the occurrence of insect-pollinated plants, which are typically underestimated in pollen analyses [24,27,50].…”

Section: Sedadna To Study Past Vegetation Changes From Lake Catchmentmentioning

confidence: 99%

Lake Sedimentary DNA Research on Past Terrestrial and Aquatic Biodiversity: Overview and Recommendations

et al. 2021

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The use of lake sedimentary DNA to track the long-term changes in both terrestrial and aquatic biota is a rapidly advancing field in paleoecological research. Although largely applied nowadays, knowledge gaps remain in this field and there is therefore still research to be conducted to ensure the reliability of the sedimentary DNA signal. Building on the most recent literature and seven original case studies, we synthesize the state-of-the-art analytical procedures for effective sampling, extraction, amplification, quantification and/or generation of DNA inventories from sedimentary ancient DNA (sedaDNA) via high-throughput sequencing technologies. We provide recommendations based on current knowledge and best practises.

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Section: Sedadna To Study Past Vegetation Changes From Lake Catchmentmentioning

confidence: 99%

Lake Sedimentary DNA Research on Past Terrestrial and Aquatic Biodiversity: Overview and Recommendations

et al. 2021

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“…Although sedaDNA has been used in addition to pollen or as an independent proxy to investigate past changes in Holocene floristic patterns (Jørgensen et al, 2012;Paus et al, 2015;Zimmermann et al, 2017;Voldstad et al, 2020), comparisons of how these two approaches reflect vegetation and diversity changes along a latitudinal vegetation gradient are still scarce, particularly for Siberia (Jørgensen et al, 2012;Zimmermann et al, 2017). In Siberia, the average July temperature in the mid-Holocene was warmer than today and its anomalies increased with latitude above 65 • N, which have been demonstrated by vegetation modeling (Monserud et al, 1998) and fossil records (e.g., Andreev et al, 2002;Nazarova et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Holocene Vegetation and Plant Diversity Changes in the North-Eastern Siberian Treeline Region From Pollen and Sedimentary Ancient DNA

et al. 2020

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Holocene Vegetation and Plant Diversity Changes through time and is higher than the other sites since around 2.5 ka. Taken together, there is no evidence to suggest that the latitudinal gradients in species diversity changes are present at a millennial scale. Additionally, a weak correlation between the principal component analysis (PCA) site scores of sedaDNA and species richness suggests that climate may not be a direct driver of species turnover within a lake's catchment. Our data suggest that sedaDNA and pollen have different but complementary abilities for reconstructing past vegetation and species diversity along a latitude.

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“…Nannochloropsis could be detected in modern sedimentary DNA data from five north Norwegian localities 51 (Supplementary Table 6). In addition to LGM Andøya 41 , Nannochloropsis has either been previously reported, or unreported, but present based on our re-analysis, in eight sedaDNA records from Greenland 52 , St. Paul Island, Alaska, USA 9,11 , Alberta and British Columbia, Canada 10 , Latvia 53 , Qinghai, China 54 and Svalbard 50,55 (Supplementary Data 7 and Supplementary Fig. 12).…”

Section: Resultsmentioning

confidence: 52%

“…This microalgae has a cosmopolitan distribution [42][43][44][45][46][47][48][49] , with all species known from marine environments, except Nannochloropsis limnetica, which is known from freshwater/brackish habitats and comprises five varieties 45,47,48 . In sediments, Nannochloropsis has not been reported from macrofossil and pollen/spore profiles, and may therefore only be identifiable using sedaDNA 10,41,50 .…”

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confidence: 99%

Environmental palaeogenomic reconstruction of an Ice Age algal population

2021

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Palaeogenomics has greatly increased our knowledge of past evolutionary and ecological change, but has been restricted to the study of species that preserve either as or within fossils. Here we show the potential of shotgun metagenomics to reveal population genomic information for a taxon that does not preserve in the body fossil record, the algae Nannochloropsis. We shotgun sequenced two lake sediment samples dated to the Last Glacial Maximum and reconstructed full chloroplast and mitochondrial genomes to explore within-lake population genomic variation. This revealed two major haplogroups for each organellar genome, which could be assigned to known varieties of N. limnetica, although we show that at least three haplotypes were present using our minimum haplotype diversity estimation method. These approaches demonstrate the utility of lake sedimentary ancient DNA (sedaDNA) for population genomic analysis, thereby opening the door to environmental palaeogenomics, which will unlock the full potential of sedaDNA.

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A complete Holocene lake sediment ancient DNA record reveals long-standing high Arctic plant diversity hotspot in northern Svalbard

Cited by 52 publications

References 68 publications

Lake Sedimentary DNA Research on Past Terrestrial and Aquatic Biodiversity: Overview and Recommendations

Lake Sedimentary DNA Research on Past Terrestrial and Aquatic Biodiversity: Overview and Recommendations

Holocene Vegetation and Plant Diversity Changes in the North-Eastern Siberian Treeline Region From Pollen and Sedimentary Ancient DNA

Environmental palaeogenomic reconstruction of an Ice Age algal population

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