Supplement 4. Pollen counts for the past 3000 years for Raven, Uchugrak, Poktovik, and Little Isac lakes.

File List LI07_pollenCounts.csv PO07_pollenCounts.csv RA07_pollenCounts.csv UC07_pollenCounts.csv Description File names reference site codes, where "XX" is a place holder for the site codes for Raven (RA), Uchugrak (UC), Poktovik (PO) and Little Isac (LI) lakes, all collected in 2007. Each file contains information on sample depth, sample age, tracers added, tracer concentration, and tracers counted (for calculating pollen accumulation rates). Rows = samples. Columns = sample identification OR taxon, as follows, with all units as counts, unless otherwise indicated below: finalTopCm[cm] calYrBP[cal. yr BP] sedVol[cm3] tracersAdded[count] meanTracer[count] Mean number of tracers per tablet. stdTracer[count] Standard deviation for mean number of tracers per table. tracersCounted[count] Number of tracers counted in sample. AlnusIncana AlnusViridis Alnus Betula Picea Populus Salix Apiaceae Artemsia Brassicaceae Caryophyllaceae Chenopodiaceae Cyperaceae Drosera Epilobium Ericaceae Fabaceae Liguliflorae Lilliaceae Poaceae Polemoniaceae Polygonaceae Ranunulaccea Rosaceae Saussurea Saxifragaceae Scriohaleriaceae Tubuliflorae Urticaceae Calitriche Equisetum Isoetes Myriophyllum Nymphaea Pediastrum Potomogetan Sparganium Typha Sphagnum Lycopodium Botryococcus MonoleteSpore TrileteSpore Degraded Aquatic Sum[count] Total aquatic grains counted. Terrestrial Sum[count] Total terrestrial grains counted. Missing values: none. Checksum values: LI07_pollenCounts.csv: 9 rows (with headers), 53 columns Column 1 (final depth top (cm)): 259.25 Column 2 (cal BP): 13896.17 Column 7 (TRACERS): 469 Column 10 (Alnus): 534 Column 20 (Cyperaceae): 510 Column 30 (Ranunculaceae): 10 Column 40 (Myriophyllum): 11 Column 50 (trilete spore): 9 PO07_pollenCounts.csv: 10 rows (with headers), 53 columns Column 1 (final depth top (cm)): 282.84 Column 2 (cal BP): 11462.43 Column 7 (TRACERS): 531 Column 10 (Alnus): 866 Column 20 (Cyperaceae): 569 Column 30 (Ranunculaceae): 3 Column 40 (Myriophyllum): 14 Column 50 (trilete spore): 7 RA07_pollenCounts.csv: 10 rows (with headers), 53 columns Column 1 (final depth top (cm)): 405.91 Column 2 (cal BP): 14434.45 Column 7 (TRACERS): 1199 Column 10 (Alnus): 757 Column 20 (Cyperaceae): 624 Column 30 (Ranunculaceae): 12 Column 40 (Myriophyllum): 10 Column 50 (trilete spore): 22 UC07_pollenCounts.csv: 16 rows (with headers), 53 columns Column 1 (final depth top (cm)): 890.5 Column 2 (cal BP): 23349.75 Column 7 (TRACERS): 551 Column 10 (Alnus): 1484 Column 20 (Cyperaceae): 1116 Column 30 (Ranunculaceae): 8 Column 40 (Myriophyllum): 17 Column 50 (trilete spore): 57