uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/dc68c63764f0c5edf6f09e7a60a0468a Dan Flynn Elizabeth Wolkovich https://orcid.org/0000-0001-7653-893X Cara O’Connor Researcher Jehane Samaha Researcher Timothy Savas Researcher 2025 English

Increasing evidence suggests that species' phenological responses may predict their performance with warming, but this work has generally ignored whether phenology is correlated with other traits known to drive plant performance. This is perhaps surprising given that interest in functional traits has also increased in recent decades, yet within the functional traits literature there has been an equally limited consideration of phenology, perhaps because robustly estimating it is time-intensive, and simple field estimates will show extreme variation across sites of different latitudes and climate regimes. Here we collected a suite of trait data on the same species for which we collected phenological data (see related dataset HF314, Leaf and Flower Phenology of Woody Plant Species at Harvard Forest and Southern Quebec 2015) to help address this gap. We focused on populations of trees in temperate forests in the Northeast face, which face different environmental conditions across their ranges. This project measured functional traits of trees at two to four sites, to provide a foundation for studies on the relationship between range shift, phenology, and functional traits.

carbon diameter at breast height leaf area nitrogen photosynthesis wood LTER controlled vocabulary primary production 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=hf452 Harvard Forest, New Hampshire, Quebec. Coordinates based on WGS84 datum. -74.02 -71.05 +46.00 +42.46 266 505 meter 2015 2015 genus Acer species pensylvanicum striped maple genus Acer species rubrum red maple genus Acer species saccharum sugar maple genus Acer species spicatum mountain maple genus Alnus species incana subsp. rugosa speckled alder genus Amelanchier species canadensis canadian serviceberry genus Amelanchier species laevis smooth serviceberry genus Aronia species melanocarpa black chokecherry genus Betula species alleghaniensis yellow birch genus Betula species lenta cherry birch genus Betula species papyrifera paper birch genus Betula species populifolia gray birch genus Cornus species alternifolia alternate-leaved dogwood genus Corylus species cornuta beaked hazelnut genus Diervilla species lonicera bush honeysuckle genus Fagus species grandifolia beech genus Fraxinus species americana white ash genus Fraxinus species nigra black ash genus Hamamelis species virginiana witch hazel genus Ilex species mucronatus mountain holly genus Kalmia species angustifolia sheep laurel genus Lonicera species canadensis american honeysuckle genus Lyonia species ligustrina maleberry genus Myrica species gale sweetgale genus Nyssa species sylvatica black gum genus Populus species grandidentata bigtooth aspen genus Prunus species pensylvanica pin cherry genus Quercus species alba white oak genus Quercus species rubra red oak genus Quercus species velutina black oak genus Rhamnus species frangula buckthorn genus Rhododendron species prinophyllum early azalea genus Ribes species glandulosum skunk currant genus Sambucus species racemosa red elderberry genus Sorbus species americana american mountain ash genus Spiraea species alba white meadowsweet genus Spiraea species tomentosa steeplebush genus Tilia species americana american linden genus Ulmus species americana american elm genus Vaccinium species myrtilloides velvet-leaved blueberry genus Viburnum species cassinoides witherod genus Viburnum species lantanoides hobblebush complete Information Manager Harvard Forest

324 North Main Street Petersham MA 01366 USA

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

324 North Main Street Petersham MA 01366 USA

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

Study sites were selected at each degree latitude between 42 and 46 degrees: Harvard Forest, White Mountains and Second College Grant in New Hampshire, and, Saint-Hippolyte, Quebec. Species were selected for this study based on their prevalence at least two of the four study sites; 44 species are included in this study. At each site, six or more representative individuals were selected for trait measurement. In the field, we measured diameter at breast height (DBH), number of stems, and height, as well as recording GPS coordinates of the individual. We collected leaf and stem samples to process the same day (leaf area, leaf fresh mass, and stem volume) or at a later date (stem mass, leaf dry mass, leaf percent nitrogen, leaf percent carbon, stomatal density) according to standard methodologies (Pérez-Harguindeguy et al. 2013, Aust J Bot). Leaf carbon and nitrogen were measured at the Torrey Laboratory at Harvard Forest, using a Elementar CHN Analyzer. In total, we sampled 854 individuals.

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. hf452-01-tree-traits.csv tree traits hf452-01-tree-traits.csv 127233 a4bfe80691bb803ce0a0806ba402b01f 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p45/hf452/hf452-01-tree-traits.csv Individual individual identifier identifier Site one of four sites GR Second College Grant HF Harvard Forest SH Saint-Hippolyte, Quebec WM White Mountains Species six letter code for species code Latitude latitude degree 1e-13 real NA missing value Longitude longitude degree 1e-13 real NA missing value Elevation elevation meter 1e-06 real NA missing value LeafArea leaf area centimeterSquared 0.001 real NA missing value FreshMass fresh leaf mass gram 0.01 real NA missing value DryMass dry leaf mass gram 0.001 real NA missing value StemVolume stem volume centimeterCubed 0.001 real NA missing value StemMass stem mass gram 0.001 real NA missing value Height height meter 0.001 real NA missing value Distance distance from tree for measuring height meter 1e-14 real NA missing value BottomAngle bottom angle degree 0.01 real NA missing value TopAngle top angle degree 1 whole NA missing value BottomM bottom meter 0.01 real NA missing value TopM top meter 0.01 real NA missing value DBH Diameter at breast height (1.3m) DBH DBH2 Diameter at breast height (1.3m) of second stem, if applicable DBH DBH3 Diameter at breast height (1.3m) of third stem, if applicable DBH DBH4 Diameter at breast height (1.3m) of fourth stem, if applicable DBH DBH5 Diameter at breast height (1.3m) of fifth stem, if applicable DBH Summer2015Notes notes notes N percent foliar nitrogen dimensionless 1e-15 real NA missing value C percent foliar carbon dimensionless 1e-13 real NA missing value StomatalLength mean of 5 stomates per image view. There were 1-3 views per individual plant micrometer 1e-13 real NA missing value StomatalDensity mean number of stomata per image view dimensionless 1e-13 real NA missing value 854 hf452-02-tree-species.csv tree species hf452-02-tree-species.csv 5177 3790a511bef0a5817cbb8a9bc18ba7e2 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p45/hf452/hf452-02-tree-species.csv Species full species name species name Genus genus name we are using genus name sp species name we are using species name Common common name; usually referenced from gobotany.newenglandwild.org common name Code six letter plant code plant code ID ID in The Plant List (TPL) using Taxonstand package in R identifier TPL_version version of TPL used TPL version TaxonomicStatus taxonomic status as in TPL taxonomic status Family family name extracted from TPL family name NewGenus genus name extracted from TPL genus name NewSpecies species name extracted from TPL species name Authority taxonomic authority extracted from TPL authority 43 biodiversity plot community regional short-term measurement https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf314