Bromine enrichment in marsh sediments as a marker of environmental changes driven by Grand Solar Minima and anthropogenic activity (Caminha, NW of Portugal)

Moreno, João; Fatela, Francisco; Leorri, Eduardo; Araújo, M. Fátima; Moreno, Filipa; Rosa, J. de la; Freitas, Maria do Carmo Duarte; Valente, Teresa Maria Fernandes; Corbett, D. Reide

doi:10.1016/j.scitotenv.2014.11.062

Cited by 20 publications

(11 citation statements)

References 89 publications

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“…4A, C, D) throughout AD 1654-1725 (similar to the WP1 time frame), in which T. salsa/irregularis dominates (87-52%; mean 66%). This supports an increase in wetness in the studied area during the WP1 period, concomitant with higher contents of bromine and organic matter (OM) in the marsh's soils/sediments, both representative of rainy/colder conditions (Moreno et al 2015(Moreno et al , 2017b. Geochemical data from this marsh also revealed a maximum of terrestrial OM contribution at this time (de la Rosa et al 2012), moreover supporting increased continental runoff, and thus rainfall.…”

Section: Wine Production and Foraminiferal Time Series Variabilitysupporting

confidence: 67%

Climate reconstruction for the Entre‐Douro‐e‐Minho region (NWPortugal) betweenAD1626 andAD1820: synthesis of viticulture data and foraminiferal evidence

Moreno

Fatela

Gonçalves

et al. 2018

Boreas

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This work presents two novel climate-related time series for the northwest of Portugal. The first is an AD 1626-1820 triennial-resolvedwine production series, based on the Benedictine accounts from six monasteries of the Entre-Douroe-Minho (EDM) region. The second, an AD 1654-2010 benthic foraminiferal record from the Caminha salt marsh, located in the lowerestuaryof the MinhoRiver. The serieswereanalysedtogether for the common periodto outlinehow both palaeoclimatic proxies respond to the most likely natural environmental drivers of temporal variability, solar forcing included. Singular spectral analysis revealed a common significant multidecadal periodicity agreeing with recognized long-term changes in solar activity, i.e. the Lower Gleissberg cycle (50-80 years). The application of wavelet analysis allowed the detection of high coherence at this time scale (centred at c. 64 years) between marsh foraminifera and both total solar irradiance and the North Atlantic Oscillation index. This relationship persists throughout the c. AD 1730-1875period. The continuouswavelettransform results for wine productionwereinconclusive. As the timespan analysed is recognized as one of high socio-economic and political distress, the main human-driven impacts on wine production, particularly in the two periods of greatly reduced solar activitythe Maunder and Dalton Minimaare reviewed in the light of the available historical records. In addition to a documented climate-related agricultural crisis in Portugal, damage and losses to wine production may have been triggered by several local and international conflicts in which the country was involved. But to what extent the two influences contributed to the wine production variations observed in the EDM region during both periods remains an open question.

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Section: Wine Production and Foraminiferal Time Series Variabilitysupporting

confidence: 67%

Climate reconstruction for the Entre‐Douro‐e‐Minho region (NWPortugal) betweenAD1626 andAD1820: synthesis of viticulture data and foraminiferal evidence

Moreno

Fatela

Gonçalves

et al. 2018

Boreas

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“…Ombrotrophic peat bogs receive only atmospheric inputs and so provide excellent archives of climatic change. It has been argued that Br concentrations are determined by climate-controlled biogenic processes and are/or not stratigraphically retained (Biester et al, 2004;Moreno et al, 2015). However, Zaccone et al (2008) argue that Br is stably conserved in the humic acid content of peat.…”

Section: Bromine As An Indicator Of Storminessmentioning

confidence: 99%

8000 years of North Atlantic storminess reconstructed from a Scottish peat record: implications for Holocene atmospheric circulation patterns in Western Europe

Stewart

Bradwell

Bullard

et al. 2017

J Quaternary Science

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North Atlantic storminess can affect human settlements, infrastructure and transport links, all of which strongly impact local, national and global economies. An increase in storm frequency and intensity is predicted over the North‐East Atlantic in the 21st century because of a northward shift in storm tracks and a persistently positive North Atlantic Oscillation (NAO), driven by recent atmospheric warming. Although documentary records of North Atlantic storminess exist, these are generally limited to the last c. 1000 years. This paper presents a continuous high‐resolution proxy record of storminess spanning the last 8000 years from a 6 m‐long core taken from a peat bog in northern Scotland. Bromine concentrations in the peat, derived from sea spray, are used to reconstruct storm frequency and storm intensity, and mire surface wetness is used as an indicator of longer‐term climate shifts. The results suggest a relationship between positive phases of the NAO and increased North Atlantic storminess. However, subtle differences between bromine concentrations and mire surface wetness suggest that high‐intensity but perhaps less frequent periods of storminess are not necessarily associated with a wetter climate.

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“…Some low molecularweight PAHs could degrade to 50% within three months (Johnsen and Karlson, 2005), which can release Br in sediment pore water. These anthropogenic sources Br and Cl can serve as geochemical proxies for superior water intrusion (especially for pollutants) into the sediments (Reddy et al, 2000;Moreno et al, 2015). Our results showed that after decades of biogeochemical cycles, the concentrations of TOC, Br and Cl turned out to be main factors affecting the microbial communities in sediments from the degraded stage (Figure 2).…”

Section: Historical Water Quality Can Be Recorded In the Sediment And Reflected By Microbial Communitymentioning

confidence: 70%

Deciphering Historical Water-Quality Changes Recorded in Sediments Using eDNA

Sun

Chen

et al. 2021

Front. Environ. Sci.

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Reservoir sediments harbor abundant bacterial communities that are sensitive to substances transferred from the water column and might record historic water quality in environmental DNA (eDNA). The unique bacterial community along the sediment profile were retrieved based on eDNA in a reservoir to investigate potential links between water quality and the microbial population on a long-time scale. Bacterial communities in sediment samples gathered into three clusters along the depth (depths of 18–38, 8–18, and 1–7 cm). These three sections accumulated during three periods in which water quality was recorded in history (the pristine stage, degraded stage and remediated stage). Sediment samples from the degraded stage had lower microbial community evenness and diversity and higher microgAMBI indices than the other two sections, suggesting that poor water quality during that period was recorded in sedimental eDNA. After decades of biogeochemical cycles, statistical analysis revealed that the main factors affecting the microbial community were bromine, chlorine, and high molecular-weight PAHs in sediments from the degraded stage. The relevant functional groups Dehalococcoidia, Gemmatimonadales, Sva0485, Burkholderiales and Xanthomonadales might be indicators of the historical loading of these pollutants. Amending the microgAMBI index with our functional group of pollution can better illustrate the significant long-term environmental changes caused by historic anthropogenic activities. In sediments from the pristine stage with less pollution input, DIC (dissolved inorganic carbon) from the karst landform was the dominant factor controlling microbial communities. Whereas, the surface sediments, which accumulated during the remediated stage, had more correlation with chemistry, such as sulfate and heavy metals, in the overlying water. Our research revealed that historical changes in the water condition, that can be affected by anthropogenic activities, can be depicted by changes in the bacterial communities stored in the sediment using sedimental eDNA. Assessments of the bacterial communities in the sediments, either by describing their biodiversity or using particular species as indicators, would be potential proxies to describe historical environmental development of microbial communities.

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Bromine enrichment in marsh sediments as a marker of environmental changes driven by Grand Solar Minima and anthropogenic activity (Caminha, NW of Portugal)

Cited by 20 publications

References 89 publications

Climate reconstruction for the Entre‐Douro‐e‐Minho region (NWPortugal) betweenAD1626 andAD1820: synthesis of viticulture data and foraminiferal evidence

Climate reconstruction for the Entre‐Douro‐e‐Minho region (NWPortugal) betweenAD1626 andAD1820: synthesis of viticulture data and foraminiferal evidence

8000 years of North Atlantic storminess reconstructed from a Scottish peat record: implications for Holocene atmospheric circulation patterns in Western Europe

Deciphering Historical Water-Quality Changes Recorded in Sediments Using eDNA

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