uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/fd58ed97057fbb50531f6921295fd76e Wyatt Oswald https://orcid.org/0000-0001-6217-1831 David Foster https://orcid.org/0000-0003-1171-3762 2023 English

Analyses of a sediment core from Little Pond, located in the town of Bolton, Massachusetts, provide new insights into the history of environmental and ecological changes in southern New England during the late Holocene. Declines in organic content and peaks in the abundance of Isoetes spores indicate reduced water depth at 2900-2600, 2200-1800, and 1200-800 calibrated years before present (cal yr BP), generally consistent with the timing of dry conditions in records from elsewhere in the northeastern United States. The Little Pond pollen record features little change over the last 3000 yr, indicating that the surrounding vegetation was relatively insensitive to these periods of drought. The 1200-800 cal yr BP dry interval, however, coincides with increased abundance of Castanea pollen, suggesting that the expansion of Castanea in southern New England may have been influenced by late-Holocene climatic variability.

climate lakes paleoecology pollen sediments vegetation dynamics LTER controlled vocabulary disturbance populations LTER core area Harvard Forest HFR LTER USA HFR default

This dataset is released to the public under Creative Commons CC0 1.0 (No Rights Reserved). Please keep the dataset creators informed of any plans to use the dataset. Consultation with the original investigators is strongly encouraged. Publications and data products that make use of the dataset should include proper acknowledgement.

Creative Commons Zero v1.0 Universal https://spdx.org/licenses/CC0-1.0.html CC0-1.0 https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf188 Little Pond (Bolton MA). Coordinates based on WGS84 datum. -71.587738 -71.587738 +42.42234 +42.42234 99 99 meter -1000 2010 genus Betula species spp. birch genus Castanea species spp. chestnut genus Fagus species spp. beech genus Picea species spp. spruce genus Pinus species spp. pine genus Quercus species spp. oak genus Tsuga species spp. hemlock complete Information Manager Harvard Forest

324 North Main Street Petersham MA 01366 USA

(978) 724-3302 hf-im@lists.fas.harvard.edu Harvard Forest

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(978) 724-3302 (978) 724-3595 https://harvardforest.fas.harvard.edu

For detailed methods, please see: Oswald, W. W., Foster, D. R. 2011. A record of late-Holocene environmental change from southern New England, USA. Quaternary Research 76: 314-318.

Harvard Forest

324 North Main Street Petersham MA 01366 USA

(978) 724-3302 (978) 724-3595 https://harvardforest.fas.harvard.edu https://ror.org/059cpzx98 pointOfContact The Harvard Forest Long-Term Ecological Research (LTER) program examines ecological dynamics in the New England region resulting from natural disturbances, environmental change, and human impacts. National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210. hf188-01-pollen-LittleBolton.csv pollen hf188-01-pollen-LittleBolton.csv 227327 b28b4037cb6732c442ab303d465d2a7c 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p18/hf188/hf188-01-pollen-LittleBolton.csv cal.age.bp calibrated age before present in years number 0.001 real NA missing value depth depth in sediment column centimeter 0.1 real NA missing value taxa name of taxa name of taxa count number of pollen grains or spores of individual taxa number 0.5 real NA missing value 8640 hf188-02-age-LittleBolton.csv age hf188-02-age-LittleBolton.csv 691 e8f27f006107a8882c3d8d069c986d6f 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p18/hf188/hf188-02-age-LittleBolton.csv depth depth in sediment column centimeter 1 whole NA missing value cal.age.bp calibrated age before present (years; present=1950 AD) number 0.00000001 real NA missing value notes notes and methods of age determination; 210Pb=lead-210 dating; 14C=radiocarbon dating; Euro settlement=determined by rise in abundance of weedy and agricultural taxa notes and methods of age determination; 210Pb=lead-210 dating; 14C=radiocarbon dating; Euro settlement=determined by rise in abundance of weedy and agricultural taxa c14 un-calibrated radiocarbon years number 1 whole NA missing value error analytical error for 14C dates in years number 1 whole NA missing value 18 hf188-03-LOI-LittleBolton.csv LOI hf188-03-LOI-LittleBolton.csv 3435 15c6b771498bbe7cbd2eda86044002bb 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p18/hf188/hf188-03-LOI-LittleBolton.csv depth depth in sediment column centimeter 0.1 real NA missing value loi estimate of organic content via percent weight loss-on-ignition (%) dimensionless 0.00000001 real NA missing value cal.age.bp calibrated age before present (years; present=1950 AD) number 0.001 real NA missing value 134 hf188-04-microchar-LittleBolton.csv microchar hf188-04-microchar-LittleBolton.csv 1083 9db558f0bb317badbd3df4c7bcab8569 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p18/hf188/hf188-04-microchar-LittleBolton.csv depth depth in sediment column centimeter 1 whole NA missing value char.area area of charcoal pieces greater than 10 and less than 180 microns in length squareMillimeters 0.00001 real NA missing value exotic.char number of exotic marker grains encountered during charcoal analysis number 1 real NA missing value pollen.sum number of pollen grains and spores of upland taxa encountered during pollen analysis number 0.5 real NA missing value exotic.pollen number of exotic maker grains encountered during pollen analysis number 1 whole NA missing value exotic.added total number of exotic marker grains added to sample numberPerCentimeterCubed 1 whole NA missing value sed.vol volume of the sediment centimeterCubed 1 whole NA missing value 28 historical paleological numberPerCentimeterCubed