Pastoralism increased vulnerability of a subalpine catchment to flood hazard through changing soil properties

Bajard, Manon; Poulenard, Jérôme; Sabatier, Pierre; Bertrand, Yann; Crouzet, Christian; Ficetola, Gentile Francesco; Blanchet, Claire; Messager, Erwan; Giguet-Covex, Charline; Gielly, Ludovic; Rioux, Delphine; Chen, Wentao; Malet, Emmanuel; Develle, Anne‐Lise; Arnaud, Fabien

doi:10.1016/j.palaeo.2019.109462

Cited by 22 publications

(17 citation statements)

References 56 publications

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“…The frequency of positive PCRs and the detection probability of domestic mammals was significantly higher with the Amicons (AmTaberlet2012 method), confirming their usefulness. Several recent studies used this approach on lake sediments and were able to successfully track 1) the presence of species, otherwise supported by other proxies (e.g., spore of coprophilous fungi; [35]) and 2) the relationships between the species distribution and environmental changes across time (e.g., [35,51,58,59]. A higher detection probability means that we are more confident of the presence-absence of species.…”

Section: Methodsmentioning

confidence: 99%

“…The metabarcoding approach applied to a high-altitude lake sediment record in the Alps revealed the first history of livestock compositional dynamics, including Bos (cow), Ovis (sheep), and Equus (horse/donkey) [31]. Other studies of lakes in the northwestern Alps have similarly provided new detailed insights into the temporal patterns of pastoral ac-tivities and changes in livestock species composition, especially during the Medieval Period [58][59][60][61]. Even in the very remote site of Kerguelen Island, an ongoing rabbit invasion could be successfully traced using sedaDNA, elucidating the impact that the invasion had on plant community and landscape erosion [35].…”

Section: Sedadna To Detect Human and Animal Presence In The Lake Catcmentioning

confidence: 99%

“…Because it is near-impossible to avoid modern human contamination, universal primers have to be combined with a human-blocking probe to inhibit the exponential amplification of human DNA templates (such as in [235]). In lake sedaDNA studies, a new universal primer, MamP007, leading to the amplification of a fragment of the mitochondrial 16S rRNA gene, was proposed and has been applied successfully [31,35,39,51,59,60]. Because of the low number of differences between this mammalian primer and the binding sites for avian species and clitellates worms, as well as the generally low mammal sedaDNA template content in lake sediments, MamP007 was also able to amplify these non-target groups of taxa [64], along with fish taxa and amphibians [179,236].…”

Section: Dna Markers and Reference Databases Used In Current Sedadna mentioning

confidence: 99%

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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: Methodsmentioning

confidence: 99%

Section: Sedadna To Detect Human and Animal Presence In The Lake Catcmentioning

confidence: 99%

Section: Dna Markers and Reference Databases Used In Current Sedadna mentioning

confidence: 99%

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

et al. 2021

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“…Floods might have been driven by increases in soil erodibility associated with land-cover changes due to the advent of grazing pressure (e.g. Giguet-Covex et al, 2011;Vanni ere et al, 2013;Bajard et al, 2020) and/or climate oscillations around the 8.2 cal BP event (see part 5.2.5; Pross et al, 2009;Daley et al, 2011;Kouli et al, 2012;Dean et al, 2015). Indeed, the first thick flood layer of the record follows the reappearance of the dung fungal spores and their longlasting presence in the record.…”

Section: Sclerophyllous Woodland and Neolithic Slash And Burn (8500-6100 Cal Bp)mentioning

confidence: 99%

Olive groves around the lake. A ten-thousand-year history of a Cretan landscape (Greece) reveals the dominant role of humans in making this Mediterranean ecosystem

Jouffroy‐Bapicot

Pedrotta

Debret

et al. 2021

Quaternary Science Reviews

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“…Hinderer et al, 2013 and references therein), only a few studies have produced a quantitative assessment of erosion rates through time (e.g. Bajard et al, 2020), but none on the quantitative impact of the various factors. The "source-to-sink" approach (e.g.…”

Section: Introductionmentioning

confidence: 99%

Quantitative evaluation of human and climate forcing on erosion in the alpine Critical Zone over the last 2000 years

Rapuc

Bouchez

Sabatier

et al. 2021

Quaternary Science Reviews

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Soil erosion is one of the main environmental threats affecting the Critical Zone (CZ) and thus ecosystem services and human societies. Through time, physical erosion is linked to both climate variations and the landscape evolution under long-term human pressures. In mountainous areas where erosion is highest a combination of large spatial and temporal approaches allows to assess the effect of these forcing factors on erosion rates. Here, we apply a retrospective approach based on lake sediments to reconstruct the long-term evolution of erosion in alpine landscapes. Lake Iseo in the Italian Alps acts as a natural sink for all the erosion products from a large catchment (1777 km²). This catchment is representative of the southern Italian Alps, where Holocene human activity and climate fluctuations are well known. The approach combines a source-to-sink method, using isotopic geochemistry (εNd, 87 Sr/ 86 Sr) associated to a multiproxy study of a lacustrine sediment section covering the last 2000 years. The applied method allows us to disentangle the role of climate and land use as erosion forcing factors through their differential impact on the various rock types present in the catchment. Indeed, the high-altitude part of the Iseo catchment, where glacier advances and retreats drive the erosion, presents isotopic signature different from those of the sedimentary rocks located in the lower part of the catchment, where both human activities and precipitations impacted erosion through time. A chronicle of glacial erosion over the last 2000 years was produced. Once the climatic trend was highlighted, the signal of erosion of sedimentary rocks was investigated to understand the influence of humans. From the Roman Period to the Industrial Age several periods of deforestation and increased human pressure were documented. The past sediment yield inferred for sedimentary rocks exhibits the highest values (> 80 t.km -2 .yr -1 ) at periods of intense human practices. Hence, since the late Roman Period, human activities seem to be the dominant forcing factor of the physical erosion in mountainous environment of northern Italy. This study presents the first reconstruction through time of sediment yield derived from lake sediments associated with sediment sources identification and quantitative evaluation of the CZ erosion drivers.

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Pastoralism increased vulnerability of a subalpine catchment to flood hazard through changing soil properties

Cited by 22 publications

References 56 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

Olive groves around the lake. A ten-thousand-year history of a Cretan landscape (Greece) reveals the dominant role of humans in making this Mediterranean ecosystem

Quantitative evaluation of human and climate forcing on erosion in the alpine Critical Zone over the last 2000 years

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