Modern pollen from the catchment and surficial sediments of a Scottish sea loch (fjord)

Cundill, Peter; Austin, William E. N.; Davies, Sarah

doi:10.1080/00173130600873919

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…Moss samples are also used extensively in studies of pollen productivity and dispersal (Räsänen et al 2004), such as those published by Broström et al (2004Broström et al ( , 2008. However, few studies have examined the underlying assumptions of the technique or compared the assemblages obtained from moss samples with assemblages from other surface sampling media (Boyd 1986;Cundill 1991;Vermoere et al 2000;Tonkov et al 2001;Räsänen et al 2004;Cundill et al 2006). Of particular interest is the length of time reflected by the pollen assemblage retrieved from moss.…”

Section: Introductionmentioning

confidence: 99%

Comparing pollen spectra from modified Tauber traps and moss samples: examples from a selection of woodlands across Europe

Pardoe

Giesecke

Knaap

et al. 2010

Veget Hist Archaeobot

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This paper compares pollen spectra derived from modified Tauber traps and moss samples from a selection of woodland types from Bulgaria, the Czech Republic, Georgia, Greece, Poland, Switzerland and Wales. The study examines the representation of individual taxa in the two sampling media and aims to ascertain the duration of pollen deposition captured by a moss. The latter aim was pursued through the calculation of dissimilarity indexes to assess how many years of pollen deposited in a pollen trap yield percentage values that are most similar to those obtained from the moss. The results are broadly scattered; the majority of moss samples being most similar to several years of pollen deposition in the adjacent trap. 123Veget Hist Archaeobot (2010) 19:271-283 DOI 10.1007/s00334-010-0258-y 2 years of pollen deposition in the trap also revealed large differences. There is a tendency for bisaccate grains such as Pinus and Picea to have a higher representation in moss than in traps but there is considerable regional variation. The results indicate that pollen proportions from moss samples often represent the pollen deposition of one area over several years. However, bisaccate pollen grains tend to be over-represented in moss samples compared to both pollen traps and, potentially, lake sediments.

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Section: Introductionmentioning

confidence: 99%

Comparing pollen spectra from modified Tauber traps and moss samples: examples from a selection of woodlands across Europe

Pardoe

Giesecke

Knaap

et al. 2010

Veget Hist Archaeobot

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“…Pollen surface samples have also been used to investigate the process of pollen deposition in different sedimentary environments in Europe, including marine sediments (Cundill et al 2006;Naughton et al 2007;Beaudouin et al 2007), coprolites (Carrión 2002), cave sediments (Carrión et al 2006) and comparisons of Tauber trap sampling versus moss polsters (Pardoe et al 2010;Lisitsyna et al 2011). Modern pollen samples have also been exploited to define the percentage levels of pollen that may indicate the regional presence or absence of major European trees (Lisitsyna et al 2012), as well helping to determine sediment provenance in earthquake limnology (Leroy et al 2009).…”

Section: Investigation Of Taphonomic Problemsmentioning

confidence: 99%

The European Modern Pollen Database (EMPD) project

Davis¹,

Zanon²,

Collins³

et al. 2013

Veget Hist Archaeobot

108

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Modern pollen samples provide an invaluable research tool for helping to interpret the quaternary fossil pollen record, allowing investigation of the relationship between pollen as the proxy and the environmental parameters such as vegetation, land-use, and climate that the pollen proxy represents. The European Modern Pollen Database (EMPD) is a new initiative within the European Pollen Database (EPD) to establish a publicly accessible repository of modern (surface sample) pollen data. This new database will complement the EPD, which at present holds only fossil sedimentary pollen data. The EMPD is freely available online to the scientific community and currently has information on almost 5,000 pollen samples from throughout the Euro-Siberian and Mediterranean regions, contributed by over 40 individuals and research groups. Here we describe how the EMPD was constructed, the various tables and their fields, problems and errors, quality controls, and continuing efforts to improve the available data

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“…Reconstructions of vegetation change from marine sedimentary sequences are influenced sorting of grains by size and physical abrasion). The preservation of terrestrial palynomorphs in marine sediments can be variable depending on the original preservation state of the grains, the source, distance and travel mechanisms, and mechanical and chemical attack (Holmes, 1994;Mildenhall, 2003;Cundill et al, 2006). This may distort the "environmental signal" from marine cores compared to traditional terrestrial representivity studies (e.g.…”

Section: Pollen Taphonomy and Residence Pathways Of Terrestrial Polle...mentioning

confidence: 99%

Late Quaternary vegetation and climate history reconstructed from palynology of marine cores off southwestern New Zealand

Ryan¹

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<p>Little is known about how mid-latitude Southern Hemisphere terrestrial vegetation responded during glacial terminations and the warmer phases of the Late Quaternary, especially beyond the last glacial cycle where records are commonly fragmentary and poorly-dated. The timing, magnitude and sequence of environmental changes are investigated here for terminations (T) I, II and V and their subsequent warm interglacials of MIS 1, 5e and 11 by direct correlation of terrestrial palynomorphs (pollen and spores) and marine climate indicators in marine piston cores MD06-2990/2991 recovered from the East Tasman Sea, west of South Island, New Zealand. The climate there is strongly influenced by the prevailing mid-latitude westerly wind belt that generates significant amounts of orographic rainfall and the proximity of the ocean which moderates temperature variability. Chronological constraint for the cores is provided by δ¹⁸O stratigraphy, radiocarbon chronology and the identification of two widespread silicic tephra horizons (25.6 ka Kawakawa/Oruanui Tephra (KOT); ~345 ka Rangitawa Tephra (RtT)) sourced from the central North Island. Similar vegetation changes over the last two glacial cycles at MD06-2991 and in the adjacent nearby on land record of vegetation-climate change from Okarito Bog permit transfer of the well resolved Marine Isotope Stage (MIS) chronology to Okarito for the pre radiocarbon dated interval (~139-28 ka). Placing both sequences on a common age scale nonetheless assumes there is minimal lag between pollen production and final deposition on the seafloor. However, the timing of Late Pleistocene palynomorph events and KOT between independently dated marine and terrestrial sedimentary sequences are found in this study to be indistinguishable, which supports the direct transfer of terrestrially derived ages to the marine realm and vice versa. Vegetation change in southwestern New Zealand is of similar structure during T-I and T-II, despite different amplitudes of forcing (i.e., insolation rise, CO₂ concentrations). In a climate amelioration scenario, shrubland-grassland gave rise to dominantly podocarp-broadleaf forest taxa, with accompanying rises in mean annual air temperature (MAAT) estimated from Okarito pollen typically synchronous with nearby ocean temperatures. The T-II amelioration commenced after ~139 ka in response to increasing boreal summer insolation intensity, with prominent ocean-atmosphere warming over the period from ~133-130 ka. In contrast, northern mid-high latitude paleoclimate records display cooling over Heinrich Stadial 11 (~135-130 ka), and are prominently warm from ~130-128 ka, while southwestern New Zealand and the adjacent ocean displays cooling. Such millennial-scale climate asynchrony between the hemispheres is most likely a result of a systematic, but non-linear re-organisation of the ocean-atmosphere circulation system in response to orbital forcing. The subsequent MIS 5e climatic optimum in Westland was between ~128-123 ka, with maximum temperatures reconstructed in the ocean and atmosphere of 2.5°C and 1.5°C higher than present. Similarities revealed between land and sea pollen records in southwestern New Zealand over the last ~160 ka offer confidence for assessing vegetation and climate for older intervals, including T-V/MIS 11, for which no adjacent terrestrial equivalents currently exist. Vegetation change over T-V is similar to T-II and T-I, with southern warming antiphased with northern mid-high latitude cooling. Tall trees and the thermophilous shrub Ascarina lucida define interglacial conditions in the study region between ~428-396 ka. East Tasman Sea surface temperatures rose in two phases; 435-426 ka (MIS 12a-MIS 11e) and 417-407 ka (MIS 11c climatic optimum), reaching at least ~1.5-2°C warmer than present over the latter. Similarly, Ascarina lucida dominance over MIS 11c is akin to that displayed during the early Holocene climatic optimum (11.5-9 ka) in west-central North Island, where MAAT average ~3°C higher today. This contrasts markedly with the dominance of the tall tree conifer Dacrydium cupressinum for the Holocene (MIS 1) and last interglacial (MIS 5e) in southwestern New Zealand. Biogeographic barriers are proposed to have inhibited the migration of species from more northerly latitudes better adapted to warmer climatic conditions over MIS 5e and MIS 11.</p>

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Modern pollen from the catchment and surficial sediments of a Scottish sea loch (fjord)

Cited by 8 publications

References 29 publications

Comparing pollen spectra from modified Tauber traps and moss samples: examples from a selection of woodlands across Europe

Comparing pollen spectra from modified Tauber traps and moss samples: examples from a selection of woodlands across Europe

The European Modern Pollen Database (EMPD) project

Late Quaternary vegetation and climate history reconstructed from palynology of marine cores off southwestern New Zealand

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