Paleoclimatic implications of the relationship between oxygen isotope ratios of moss cellulose and source water in wetlands of Lake Superior

Zanazzi, Alessandro; Mora, Germán

doi:10.1016/j.chemgeo.2005.08.006

Cited by 43 publications

(29 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the oxygen isotope ratio of cellulose (d 18 O C ) is enriched by c. 27& compared with water at the site of cellulose synthesis (Deniro & Epstein, 1979;Da Silveira et al, 1989;Sternberg et al, 2006), a value that has been confirmed in Sphagnum species (Zanazzi & Mora, 2005). Thus d…”

Section: Introductionmentioning

confidence: 69%

Temporal separation between CO₂ assimilation and growth? Experimental and theoretical evidence from the desiccation‐tolerant moss Syntrichia ruralis

Royles

Ogée²,

Wingate

et al. 2013

New Phytologist

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 69%

Temporal separation between CO₂ assimilation and growth? Experimental and theoretical evidence from the desiccation‐tolerant moss Syntrichia ruralis

Royles

Ogée²,

Wingate

et al. 2013

New Phytologist

View full text Add to dashboard Cite

show abstract

“…Fractionation of δ 18 O Sphagnum between modern mire water and Sphagnum cellulose amounts to 37.0 and 38.2‰ for stems and branches, respectively. This enrichment is considerably larger than the sole biochemical fractionation during cellulose synthesis (Sternberg et al ., 1986) as it probably includes additional enrichment effects through evaporation to be expected on S. fuscum hummocks (Zanazzi and Mora, 2005).…”

Section: Resultsmentioning

confidence: 99%

Climate change during the past 1000 years: a high‐temporal‐resolution multiproxy record from a mire in northern Finland

Finsinger

Schoning

Hicks

et al. 2012

J Quaternary Science

View full text Add to dashboard Cite

We present a record of peatland development in relation to climate changes and human activities from the Palomaa mire, a remote site in northern Finland. We used fine‐resolution and continuous sampling to analyse several proxies including pollen (for vegetation on and around the mire), testate amoebae (TA; for mire‐wetness changes), oxygen and carbon isotopes from Sphagnum cellulose (δ18O and δ13C; for humidity and temperature changes), peat‐accumulation rates and peat‐colour changes. In spite of an excellent accumulation model (30 14C dates and estimated standard deviation of sample ages <1 year in the most recent part), the potential to determine cause–effect (or lead–lag) relationships between environmental changes and biotic responses is limited by proxy‐specific incorporation processes below the actively growing Sphagnum surface. Nevertheless, what emerges is that mire development was closely related to water‐table changes rather than to summer temperature and that water‐table decreases were associated with increasing peat‐accumulation rates and more abundant mire vegetation. A rapid fen‐to‐bog transition occurred within a few years around AD 1960 when the water table decreased beyond the historical minimum, supporting the notion that mires can rapidly shift into bogs in response to allogenic factors. Copyright © 2012 John Wiley & Sons, Ltd.

show abstract

“…The occurrence of Sphagnum section Cuspidata is restricted to wet bog surface conditions since this species is mostly found in wet hollows and shallow pools (Barber and Langdon, 2007) The overall value of the enrichment factor between the oxygen isotope composition of source water and moss cellulose (D cellewater ) from recent bog habitats has been found to be species dependent (Ménot-Combes et al, 2002). Habitat conditions also play a significant role since hollow species, such as Sphagnum section Cuspidata, 18 O water relationship for bog and mire ecosystems generally limit the use of the oxygen isotope composition of Sphagnum cellulose from peat deposits in palaeoclimate reconstruction (Zanazzi and Mora, 2005). Therefore only the pool phases can be interpreted with certitude in terms of changing hydrological conditions inducing shifts in the d…”

Section: Stable Isotope Signaturementioning

confidence: 99%

A millennial record of environmental change in peat deposits from the Misten bog (East Belgium)

Vleeschouwer¹,

Pazdur²,

Luthers³

et al. 2012

Quaternary International

View full text Add to dashboard Cite

a b s t r a c tIn this study, palaeoenvironmental changes recorded in the top metre of a peat profile (Misten bog, East Belgium) were investigated using a multiproxy approach. Proxies include bulk density, Ti and Si content, pollen, macrofossils, d13 C on specific Sphagnum stems, and d 13Ced 18O on Sphagnum leaves. A highresolution chronology was generated using 210 Pb measurements and 22 14 C AMS dates on carefully selected Sphagnum macrofossils. d 13C only records large change in mire surface wetness. This is partly due to the fact that the core was taken from the edge of a hummock, which may make it difficult to track small isotopic changes. The d 13 C signal seems to be dependent upon the Sphagnum species composition.For example, a change between Sphagnum section Cuspidata towards Sphagnum imbricatum causes a significant drop in the d 13 C values. On the whole, the C and O isotopes record two shallow pool phases during the 8the9th and the 13th centuries. Pollen and atmospheric soil dust (ASD) fluxes records increased human occupation in the area. There may be some climatic signals in the ASD flux, but they are difficult to decipher from the increasing human impact (land clearance, agriculture) during the last millennium. The variations in the proxies are not always synchronous, suggesting different triggering factors (temperature, wetness, windiness) for each proxy. This study also emphasizes that, compared to studies dealing with pollution using geochemical proxies, palaeoclimatic inferences from peat bogs need as many proxies as possible, together with highly accurate and precise age-models, in order to better understand climate variability and their consequences during the Holocene.

show abstract

Paleoclimatic implications of the relationship between oxygen isotope ratios of moss cellulose and source water in wetlands of Lake Superior

Cited by 43 publications

References 35 publications

Temporal separation between CO₂ assimilation and growth? Experimental and theoretical evidence from the desiccation‐tolerant moss Syntrichia ruralis

Temporal separation between CO₂ assimilation and growth? Experimental and theoretical evidence from the desiccation‐tolerant moss Syntrichia ruralis

Climate change during the past 1000 years: a high‐temporal‐resolution multiproxy record from a mire in northern Finland

A millennial record of environmental change in peat deposits from the Misten bog (East Belgium)

Contact Info

Product

Resources

About

Paleoclimatic implications of the relationship between oxygen isotope ratios of moss cellulose and source water in wetlands of Lake Superior

Cited by 43 publications

References 35 publications

Temporal separation between CO2 assimilation and growth? Experimental and theoretical evidence from the desiccation‐tolerant moss Syntrichia ruralis

Temporal separation between CO2 assimilation and growth? Experimental and theoretical evidence from the desiccation‐tolerant moss Syntrichia ruralis

Climate change during the past 1000 years: a high‐temporal‐resolution multiproxy record from a mire in northern Finland

A millennial record of environmental change in peat deposits from the Misten bog (East Belgium)

Contact Info

Product

Resources

About

Temporal separation between CO₂ assimilation and growth? Experimental and theoretical evidence from the desiccation‐tolerant moss Syntrichia ruralis

Temporal separation between CO₂ assimilation and growth? Experimental and theoretical evidence from the desiccation‐tolerant moss Syntrichia ruralis