Appraising the cohesion of palaeoenvironmental reconstructions in north-west Spain since the mid-Holocene from a high temporal resolution multi-proxy peat record
Restricted accessResearch articleFirst published online May, 2018
Appraising the cohesion of palaeoenvironmental reconstructions in north-west Spain since the mid-Holocene from a high temporal resolution multi-proxy peat record
Investigation of abrupt palaeohydrological regime change remains challenging due to site-specific noise ratios and the limitations of dating control and spatial resolution of multi-proxy records. Some of these issues are addressed through a well dated and highly resolved record from an ombrotrophic peatland in Galicia, north-west Spain. The site is in an ideal location to record marine influences and test models of past palaeoclimatic boundaries and ocean-atmosphere linkages through multi-proxy records of macrofossils, microfossils, charcoal, peat humification and loss-on-ignition data. In conjunction with many regional proxy records of terrestrial and marine origin, the data suggest spatial coherence between 5300 and ca. 3300 cal. BP and continue to link to marine responses afterwards. After ca. 2000 cal. BP, episodes of spatially consistent palaeohydrological change persist but become more short-lived, local and sporadic in north-west Iberia. These indicate an increase in the complexity of drivers of palaeoenvironmental change in recent millennia. Fire history inferred from microscopic charcoal and apparent upland erosion indicated by the loss-on-ignition profile relate to anthropogenic pressure and appear to be linked to local deforestation phases in the Xistral uplands.
AabyBTauberH (1975) Rates of peat formation in relation to degree of humification and local environment, as shown by studies of a raised bog in Denmark. Boreas4: 1–14.
2.
ÁlvarezMCFloresJASierroFJet al. (2005) Millennial surface water dynamics in the Ría de Vigo during the last 3000 years as revealed by coccoliths and molecular biomarkers. Palaeogeography, Palaeoclimatology, Palaeoecology218: 1–13.
3.
AmesburyMJBarberKEHughesPDM (2012) The relationship of fine-resolution, multi-proxy palaeoclimate records to meteorological data at Fagelmossen, Varmland, Sweden and the implications for the debate on climate drivers of the peat-based record. Quaternary International268: 77–86.
4.
AndradeARubioBReyDet al. (2011) Palaeoclimatic changes in the NW Iberian Peninsula during the last 3000 years inferred from diagenetic proxies in the Ría de Muros sedimentary record. Climate Research48: 247–259.
5.
BarberKELangdonP (2001) Testing the palaeoclimatic signal from peat bogs – temperature or precipitation forcing? In: Abstracts, PAGES-PEPIII/ESF-HOLIVAR International Conference: Past Climate Variability through Europe and Africa. Aix-en-Provence: ECRC/CEREGE, pp. 58–59.
6.
BarberKELangdonPG (2007) What drives the peat-based palaeoclimate record? A critical test using multi-proxy climate records from northern Britain. Quaternary Science Reviews26: 3318–3327.
7.
BenitoGThorndycraftVRRicoMet al. (2008) Palaeoflood and floodplain records from Spain: Evidence for long-term climate variability and environmental changes. Geomorphology101: 68–77.
8.
BernárdezPGonzález-ÁlvarezRFrancésGet al. (2008) Late Holocene history of the rainfall in the NW Iberian peninsula – Evidence from a marine record. Journal of Marine Systems72: 366–382.
9.
BeugHJ (2004) Leitfaden der Pollenbestimmung für Mitteleuropa und angrenzende Gebiete. München: Dr. Friedrich Pfeil.
10.
BlaauwM (2012) Out of tune: The dangers of aligning proxy archives. Quaternary Science Reviews36: 38–49.
11.
BlaauwMChristenJA (2011) Flexible paleoclimate age-depth models using an autoregressive gamma process. Bayesian Analysis6: 457–474.
12.
BlackfordJJChambersFM (1993) Determining the degree of peat decomposition for peat-based palaeoclimatic studies. International Peat Journal5: 7–24.
13.
BlundellABarberK (2005) A 2800-year palaeoclimatic record from Tore Hill Moss, Strathspey, Scotland: The need for a multi-proxy approach to peat-based climate reconstructions. Quaternary Science Reviews24: 1261–1277.
14.
BondGKromerBBeerJet al. (2001) Persistent solar influence on north Atlantic climate during the Holocene. Science294: 2130–2136.
15.
BoothRK (2010) Testing the climate sensitivity of peat-based paleoclimate reconstructions in mid-continental North America. Quaternary Science Reviews29: 720–731.
16.
BoothRKLamentowiczMCharmanDJ (2010) Preparation and analysis of testate amoebae in peatland paleoenvironmental studies. Mires and Peat7: 2.
17.
CaseldineCJBakerACharmanDJet al. (2000) A comparative study of optical properties of NaOH peat extracts: Implications for humification studies. The Holocene10: 649–658.
18.
CastroDSoutoMGarcia-RodejaEet al. (2015) Climate change records between the mid- and late Holocene in a peat bog from Serra do Xistral (SW Europe) using plant macrofossils and peat humification analyses. Palaeogeography, Palaeoclimatology, Palaeoecology420: 82–95.
19.
ChambersFACharmanDJ (2004) Holocene environmental change: Contributions from the peatland archive. The Holocene14: 1–6.
20.
ChambersFMBeilmanDWYuZ (2011) Methods for determining peat humification and for quantifying peat bulk density, organic matter and carbon content for palaeostudies of climate and peatland carbon dynamics. Mires and Peat7: 7.
21.
ChambersFMBoothRKDe VleeschouwerFet al. (2012) Development and refinement of proxy-climate indicators from peats. Quaternary International268: 21–33.
22.
CharmanDJ (2007) Summer water deficit variability controls on peatland water-table changes: Implications for Holocene palaeoclimate reconstructions. The Holocene17: 217–227.
23.
CharmanDJ (2010) Centennial climate variability in the British Isles during the mid-late Holocene. Quaternary Science Reviews29: 1539–1554.
24.
CharmanDJBarberKEBlaauwMet al. (2009) Climate drivers for peatland palaeoclimate records. Quaternary Science Reviews28: 1811–1819.
CharmanDJBrownADHendonDet al. (2004) Testing the relationship between Holocene peatland palaeoclimate reconstructions and instrumental data at two European sites. Quaternary Science Reviews23: 137–143.
27.
CharmanDJHohlVBlundellAet al. (2012) A 1000-year reconstruction of summer precipitation from Ireland: Calibration of a peat-based palaeoclimate record. Quaternary International268: 87–97.
28.
CorcoranJP (2007) Impact of Climate Change on Fire Regime in North-west Spain. Dublin: Centre for the Environment, Trinity College Dublin.
29.
DanielsREEddyA (1990) Handbook of European Sphagna. London: HMSO.
30.
DizPFrancesGPelejeroCet al. (2002) The last 3000 years in the Ria de Vigo (NW Iberian Margin): Climatic and hydrographic signals. The Holocene12: 459–468.
31.
DupontLM (1986) Temperature and rainfall variation in the holocene based on comparative palaeoecology and isotope geology of a hummock and a hollow (Bourtangerveen, The Netherlands). Review of Palaeobotany and Palynology48: 71–88.
32.
Fábregas ValcarceRMartínez-CortizasABlanco ChaoRet al. (2003) Environmental change and social dynamics in the second-third millennium BC in NW Iberia. Journal of Archaeological Science30: 859–871.
33.
FaegriKIversenJ (1989) Textbook of Pollen Analysis. Chichester: Wiley.
34.
FletcherWJZielhoferC (2013) Fragility of Western Mediterranean landscapes during Holocene Rapid Climate Changes. Catena103: 16–29.
35.
FlynnWW (1968) Determination of low levels of polonium-210 in environmental materials. Analytica Chemica Acta43: 221–227.
36.
Fraga VilaIRomeroDSahuquilloE (2005) Patterns of vegetation in relation to environmental conditions in Northwestern Spanish mires. In: IMCG Mires and Peatlands Field Symposium, Tierra del Fuego, 21 November–1 December 2005. Greifswald: International Mire Conservation Group, pp. 35–36.
37.
GemieS (2006) Galicia: A Concise History. Cardiff: University of Wales Press.
38.
González-ÁlvarezRBernárdezPPenaLDet al. (2005) Paleoclimatic evolution of the Galician continental shelf (NW of Spain)during the last 3000 years: From a storm regime to present conditions. Journal of Marine Systems54: 245–260.
39.
GrayLJBeerJGellerMet al. (2010) Solar influences on climate. Reviews of Geophysics48: RG4001.
40.
GrimmEC (1987) CONISS: A FORTRAN 77 program for stratigraphically constrained cluster analysis by the method of incremental sum of squares. Computers & Geosciences13: 13–35.
41.
GrimmEC (2011) Tilia 1.7.14. Springfield, IL: Illinois State Museum.
42.
GrimshawHM (1989) Analysis of soils. In: AllenSE (ed.) Chemical Analysis of Ecological Materials. 2nd edition.Oxford: Blackwell Scientific, p. 416.
43.
Guitián RiveraL (2001) La destrucción histórica del bosque en Galicia. Semata: Ciencias Sociais E Humanidades13: 105–166.
44.
HillmanALAbbottMBValero-GarcésBet al. (2017) Lead pollution resulting from Roman gold extraction in northwestern Spain. The Holocene27: 1465–1474.
45.
JohnsenSJDahl-JensenDGundestrupNet al. (2001) Oxygen isotope and palaeotemperature records from six Greenland ice-core stations: Camp Century, Dye-3, GRIP, GISP2, Renland and NorthGRIP. Journal of Quaternary Science16: 299–307.
46.
JowseyPC (1966) An improved peat sampler. New Phytologist65: 245–249.
47.
KaalJCarrión MarcoYAsoutiEet al. (2011) Long-term deforestation in NW Spain: Linking the Holocene fire history to vegetation change and human activities. Quaternary Science Reviews30: 161–175.
48.
KruskalJBWishM (1978) Multidimensional Scaling, Sage University Paper Series on Quantitative Application in the Social Sciences. Beverly Hills, CA; London: SAGE.
49.
LangdonPGBarberKEHughesPDM (2003) A 7500-year peat-based palaeoclimatic reconstruction and evidence for an 1100-year cyclicity in bog surface wetness from Temple Hill Moss, Pentland Hills, southeast Scotland. Quaternary Science Reviews22: 259–274.
50.
LebreiroSFrancésGAbrantesFet al. (2006) Climate change and coastal hydrographic response along the Atlantic Iberian margin (Tagus Prodelta and Muros Ría) during the last two millennia. The Holocene16: 1003–1015.
51.
López-MerinoLMartínez-CortizasAReherGSet al. (2014) Reconstructing the impact of human activities in a NW Iberian Roman mining landscape for the last 2500 years. Journal of Archaeological Science50: 208–218.
52.
McCluneBGraceJBUrbanDL (2002) Analysis of Ecological Communities. Gleneden Beach, OR: MjM Software Design.
53.
MacklinMGBenitoGGregoryKJet al. (2006) Past hydrological events reflected in the Holocene fluvial record of Europe. Catena66: 145–154.
54.
MagnyMCombourieu-NeboutNde BeaulieuJLet al. (2013) North-south palaeohydrological contrasts in the central Mediterranean during the Holocene: Tentative synthesis and working hypotheses. Climate of the past9: 2043–2071.
55.
MannMEZhangZRutherfordSet al. (2009) Global signatures and dynamical origins of the Little Ice Age and Medieval Climate Anomaly. Science326: 1256–1260.
56.
MartinACBarkleyWD (1961) Seed Identification Manual. Berkeley CA; Los Angeles, CA: University of California Press.
57.
Martínez-CortizasABiesterHMighallTM (2007) Climate-driven enrichment of pollutants in peatlands. Biogeosciences4: 905–911.
58.
Martínez-CortizasACosta-CasaisMLópez-SáezJA (2009) Environmental change in NW Iberia between 7000 and 500 cal BC. Quaternary International200: 77–89.
59.
Martínez-CortizasACastillo RodríguezFPérez AlbertiAet al. (2000) Atlas climático de Galicia. Santiago de Compostela: Santiago de Compostela Consellaría de Medio Ambiente, Xunta de Galicia.
60.
Martínez-CortizasAGarcia-RodejaEPontevedra-PombalXet al. (2002) Atmospheric Pb deposition in Spain during the last 4600 years recorded by two ombrotrophic peat bogs and implications for the use of peat as archive. Science of the Total Environment292: 33–44.
61.
Martínez-CortizasALopez-MerinoLBindlerRet al. (2013) Atmospheric Pb pollution in N Iberia during the late Iron Age/Roman times reconstructed using the high-resolution record of La Molina mire (Asturias, Spain). Journal of Paleolimnology50: 71–86.
62.
Martínez-CortizasAMighallTPontevedra-PombalXet al. (2005) Linking changes in atmospheric dust deposition, vegetation change and human activities in northwest Spain during the last 5300 years. The Holocene15: 698–706.
63.
Martínez-CortizasAPontevedra-PombalXGarcia-RodejaEet al. (1999) Mercury in a Spanish peat bog: Archive of climate change and atmospheric metal deposition. Science284: 939–942.
64.
MartinsVJouanneauJMWeberOet al. (2006) Tracing the late Holocene evolution of the NW Iberian upwelling system. Marine Micropaleontology59: 35–55.
65.
MartinsVRochaFGomesCet al. (2005) Geochemical, textural, mineralogical and micropaleontological data used for climatic reconstruction during the Holocene in the Galician sector of the Iberian continental margin. Ciencias Marinas31: 293–308.
66.
MauquoyDHughesPDMvan GeelB (2010) A protocol for plant macrofossil analysis of peat deposits. Mires and Peat7: 6.
MighallTMCortizasAMBiesterHet al. (2006) Proxy climate and vegetation changes during the last five millennia in NW Iberia: Pollen and non-pollen palynomorph data from two ombrotrophic peat bogs in the North Western Iberian Peninsula. Review of Palaeobotany and Palynology141: 203–223.
69.
MookWGStreurmanHJ (1983) Physical and chemical aspects of radiocarbon dating. In: MookWGWaterbolkHT (eds) Proceedings of the 1st International Symposium 14C and Archaeology (Volume 8 of PACT). Strasbourg: Council of Europe, pp. 31–55.
70.
MooneySDBlackM (2003) A simple and fast method for calculating the area of macroscopic charcoal isolated from sediments. Quaternary Australasia21: 18–21.
71.
MooneySDRadfordK (2001) A simple and fast method for the quantification of microscopic charcoal in sediments. Quaternary Australasia19: 43–46.
MorenoAGonzález-SampérizPMorellónMet al. (2012a) Northern Iberian abrupt climate change dynamics during the last glacial cycle: A view from lacustrine sediments. Quaternary Science Reviews36: 139–153.
74.
MorenoAPérezAFrigolaJet al. (2012b) The Medieval Climate Anomaly in the Iberian Peninsula reconstructed from marine and lake records. Quaternary Science Reviews43: 16–32.
75.
OrmeLCCharmanDJReinhardtLet al. (2017) Past changes in the North Atlantic storm track driven by insolation and sea-ice forcing. Geology45: 335–338.
76.
OrtizJEGallegoJLRTorresTet al. (2010) Palaeoenvironmental reconstruction of Northern Spain during the last 8000 cal yr BP based on the biomarker content of the Roñanzas peat bog (Asturias). Organic Geochemistry41: 454–466.
77.
PenaLDFrancésGDizPet al. (2010) Climate fluctuations during the Holocene in NW Iberia: High and low latitude linkages. Continental Shelf Research30: 1487–1496.
78.
PiotrowskaNBlaauwMMauquoyDet al. (2011) Constructing deposition chronologies for peat deposits using radiocarbon dating. Mires and Peat7: 10.
79.
Pontevedra-PombalXMighallTMNóvoa-MuñozJCet al. (2013) Five thousand years of atmospheric Ni, Zn, As, and Cd deposition recorded in bogs from NW Iberia: Prehistoric and historic anthropogenic contributions. Journal of Archaeological Science40: 764–777.
80.
Pontevedra-PombalXNovoa MunfozJCGarcia RodejaEet al. (2006) Mountain mires from Galicia (NW Spain). In: MartiniIPMartínez CortizasAChesworthW (eds) Peatlands: Evolution and Records of Environmental and Climate Changes. Amsterdam: Elsevier, pp. 85–109.
81.
ReimerPJBardEBaylissAet al. (2013) IntCal13 and Marine13 radiocarbon age calibration curves 0–50,000 years cal BP. Radiocarbon55: 1869–1887.
82.
Rivas-MartínezS (1990) Bioclimatic belts of west Europe (relations between bioclimate and plant ecosystems). In: DuplessyJCPonsAFantechiR (eds) Environment and Quality of Life: Climate and Global Change (Proceedings European School Climate Natural Hazards Course). Luxembourg: Commission of the European Communities, pp. 225–246.
83.
RobbinsJA (1978) Geochemical and geophysical applications of radioactive lead. In: NriaguJO (ed.) The Biogeochemistry of Lead in the Environment. Part A. Amsterdam: Elsevier, pp. 285–293.
84.
RolandTPCaseldineCJCharmanDJet al. (2014) Was there a ‘4.2 ka event’ in Great Britain and Ireland? Evidence from the peatland record. Quaternary Science Reviews83: 11–27.
85.
SaavedraP (1985) Economia, Política y Sociedad en Galicia: La Provincia de Mondoñedo. Santiago de Compostela: Xunta De Galicia.
86.
SchellekensJBuurmanPFragaIet al. (2011) Holocene vegetation and hydrologic changes inferred from molecular vegetation markers in peat, Penido Vello (Galicia, Spain). Palaeogeography, Palaeoclimatology, Palaeoecology299: 56–69.
87.
Silva-SánchezNCortizasAMLópez-MerinoL (2014) Linking forest cover, soil erosion and mire hydrology to late-Holocene human activity and climate in NW Spain. The Holocene24: 714–725.
88.
SmithAJE (2004) The Moss Flora of Britain and Ireland. Cambridge: Cambridge University Press.
89.
StefaniniB (2008) A Comparison of Climate and Vegetation Dynamics in Central Ireland and NW Spain since the Mid-Holocene. Dublin: Trinity College Dublin.
90.
StockmarrJ (1971) Tablets with spores used in absolute pollen analysis. Pollen et Spores13: 615–621.
91.
SwindlesGTLawsonITMatthewsIPet al. (2013) Centennial-scale climate change in Ireland during the Holocene. Earth-Science Reviews126: 300–320.
92.
ThorndycraftVRBenitoG (2006) The Holocene fluvial chronology of Spain: Evidence from a newly compiled radiocarbon database. Quaternary Science Reviews25: 223–234.
93.
van GeelB (1978) A palaeoecological study of Holocene peat bog sections in Germany and The Netherlands, based on the analysis of pollen, spores and macro- and microscopic remains of fungi, algae, cormophytes and animals. Review of Palaeobotany and Palynology25: 1–120.
94.
van GeelB (1986) Application of fungal and algal remains and other microfossils in palynological analyses. In: BerglundBE (ed.) Handbook of Holocene Palaeoecology and Palaeohydrology. Chichester: John Wiley & Sons, pp. 497–505.
95.
van GeelB (2001) Non-pollen palynomorphs. In: SmolJPBirksJBLastWM (eds) Tracking Environmental Change Using Lake Sediments. Volume 3: Terrestrial, Algal and Silicaceous Indicators. Dordrecht: Kluwer, pp. 99–119.
96.
van GeelBAptrootA (2006) Fossil ascomycetes in Quaternary deposits. Nova Hedwigia82: 313–329.
97.
van GeelBGrenfellHR (1996) Spores of Zygnemataceae. In: JansoniusJMcGregorDC (eds) Palynology: Principles and Applications. Dallas, TX: American Association of Stratigraphic Palynologists Foundation, pp. 173–179.
98.
WannerHBeerJBütikoferJet al. (2008) Mid- to Late-Holocene climate change: An overview. Quaternary Science Reviews27: 1791–1828.
99.
WardenaarECP (1987) A new hand tool for cutting peat profiles. Canadian Journal of Botany65: 1772–1773.
100.
YeloffDMauquoyD (2006) The influence of vegetation composition on peat humification: Implications for palaeoclimatic studies. Boreas35: 662–673.
