scholarly journals Carpinus betulus pollen accumulation rates in Roztocze (SE Poland) in relation to presence of Carpinus in Ferdynandovian pollen diagrams

2017 ◽  
Vol 26 ◽  
pp. 95
Author(s):  
Irena Agnieszka Pidek
Keyword(s):  
Accumulation Rates ◽  
Carpinus Betulus ◽  
Pollen Accumulation Rates ◽  
Se Poland ◽  
Pollen Diagrams

scholarly journals Linking modern pollen accumulation rates to biomass: Quantitative vegetation reconstruction in the western Klamath Mountains, NW California, USA

The Holocene ◽  
2021 ◽  
pp. 095968362098803
Author(s):  
Clarke A Knight ◽  
Mark Baskaran ◽  
M Jane Bunting ◽  
Marie Champagne ◽  
Matthew D Potts ◽  
...  
Keyword(s):  
Mean Squared Error ◽  
Plant Biomass ◽  
Source Area ◽  
Pollen Deposition ◽  
Accumulation Rates ◽  
Klamath Mountains ◽  
Plant Abundance ◽  
Circular Area ◽  
Value Analysis ◽  
Pollen Accumulation Rates

Quantitative reconstructions of vegetation abundance from sediment-derived pollen systems provide unique insights into past ecological conditions. Recently, the use of pollen accumulation rates (PAR, grains cm−2 year−1) has shown promise as a bioproxy for plant abundance. However, successfully reconstructing region-specific vegetation dynamics using PAR requires that accurate assessments of pollen deposition processes be quantitatively linked to spatially-explicit measures of plant abundance. Our study addressed these methodological challenges. Modern PAR and vegetation data were obtained from seven lakes in the western Klamath Mountains, California. To determine how to best calibrate our PAR-biomass model, we first calculated the spatial area of vegetation where vegetation composition and patterning is recorded by changes in the pollen signal using two metrics. These metrics were an assemblage-level relevant source area of pollen (aRSAP) derived from extended R-value analysis ( sensu Sugita, 1993) and a taxon-specific relevant source area of pollen (tRSAP) derived from PAR regression ( sensu Jackson, 1990). To the best of our knowledge, aRSAP and tRSAP have not been directly compared. We found that the tRSAP estimated a smaller area for some taxa (e.g. a circular area with a 225 m radius for Pinus) than the aRSAP (a circular area with a 625 m radius). We fit linear models to relate PAR values from modern lake sediments with empirical, distance-weighted estimates of aboveground live biomass (AGLdw) for both the aRSAP and tRSAP distances. In both cases, we found that the PARs of major tree taxa – Pseudotsuga, Pinus, Notholithocarpus, and TCT (Taxodiaceae, Cupressaceae, and Taxaceae families) – were statistically significant and reasonably precise estimators of contemporary AGLdw. However, predictions weighted by the distance defined by aRSAP tended to be more precise. The relative root-mean squared error for the aRSAP biomass estimates was 9% compared to 12% for tRSAP. Our results demonstrate that calibrated PAR-biomass relationships provide a robust method to infer changes in past plant biomass.

scholarly journals Signals of tree volume and temperature in a high-resolution record of pollen accumulation rates in northern Finland

2012 ◽  
Vol 27 (6) ◽  
pp. 564-574 ◽  
Author(s):  
F. Mazier ◽  
A. B. Nielsen ◽  
A. Broström ◽  
S. Sugita ◽  
S. Hicks
Keyword(s):  
High Resolution ◽  
Accumulation Rates ◽  
Pollen Accumulation Rates

Revisiting pollen accumulation rates from Swedish lake sediments

The Holocene ◽  
2008 ◽  
Vol 18 (2) ◽  
pp. 293-305 ◽  
Author(s):  
Thomas Giesecke ◽  
Sonia L. Fontana
Keyword(s):  
Lake Sediments ◽  
Accumulation Rates ◽  
Pollen Accumulation Rates

Modern pollen accumulation rates at the north-western fringe of the European boreal forest

2008 ◽  
Vol 151 (3-4) ◽  
pp. 90-109 ◽  
Author(s):  
Martina Hättestrand ◽  
Christin Jensen ◽  
Margrét Hallsdóttir ◽  
Karl-Dag Vorren
Keyword(s):  
Boreal Forest ◽  
Accumulation Rates ◽  
The North ◽  
Pollen Accumulation Rates ◽  
Modern Pollen ◽  
North Western

scholarly journals Variation in annual pollen accumulation rates of Fagus along a N–S transect in Europe based on pollen traps

2010 ◽  
Vol 19 (4) ◽  
pp. 259-270 ◽  
Author(s):  
Irena A. Pidek ◽  
Helena Svitavská-Svobodová ◽  
Willem O. van der Knaap ◽  
Agnieszka M. Noryśkiewicz ◽  
Anna Filbrandt-Czaja ◽  
...  
Keyword(s):  
Accumulation Rates ◽  
Pollen Accumulation Rates ◽  
Pollen Traps

scholarly journals Towards quantitative palynology: using pollen accumulation rates and models of pollen dispersal

2010 ◽  
Vol 19 (4) ◽  
pp. 243-245 ◽  
Author(s):  
Thomas Giesecke ◽  
Willem O. van der Knaap ◽  
Felix Bittmann
Keyword(s):  
Pollen Dispersal ◽  
Accumulation Rates ◽  
Pollen Accumulation Rates
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