Short-Term Effects on Vegetation in Soil Warming Plus Nitrogen Addition Experiment at Harvard Forest 2006

doi:10.6073/pasta/0a4973594937b0e7e7a3cbe8e3f43087 Short-Term Effects on Vegetation in Soil Warming Plus Nitrogen Addition Experiment at Harvard Forest 2006 Sydne Record https://orcid.org/0000-0001-7293-2155 Serita Frey https://orcid.org/0000-0002-9221-5919 Aaron Ellison https://orcid.org/0000-0003-4151-6081 2023 English

The purpose of this experiment is to examine the interactive affects of warming and N additions on plant diversity. The experiment consists of four treatments (control, heated +N, heated -N, +N only) with six replicates per treatment in a completely randomized design. Average soil temperature in the heated plots will be elevated 5 deg C above ambient by the use of buried heating cables placed at 10 cm depth in the soil and spaced 20 cm apart. The heating cables will be controlled by a data logger that monitors thermistors (5 per plot) every 10 min. Plots will automatically turn on and off to maintain a 5 deg C temperature difference between the heated and control plots. The N addition plots (heated +N, +N only) will be fertilized following the protocol of the Chronic Nitrogen Addition Study. An aqueous solution of NH4NO3 will be applied at a rate equivalent to the low N plots at the chronic N study (5 g m-2 yr-1). Fertilizer will be applied in equal monthly doses during the growing season (Apr-Oct). The control plots and unfertilized, heated plots (heated -N) will receive water only.

diversity nitrogen soil warming LTER controlled vocabulary inorganic nutrients disturbance 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=hf163 Prospect Hill Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.18 -72.18 +42.54 +42.54 365 365 meter 2006 2006 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

To sample plants, we counted all stems of every plant in each 3m x 3m plot. Species codes: Acepen: Acer pennsylvanicum Acerub: Acer rubrum Acerubs: Acer rubrum seedling Aranud: Aralia nudicaulis Betale: Betula alleghaniensis Betlen: Betula lenta Betspp: Betula sp. (seedling) Carpen: Carex pensylvanica Casden: Castanea dentata Clibor: Clintonia borealis Craspp: Craetagus species (seedling) Coptri: Coptis trifolia Denobs: Dendrolycopodium obscurum Denpun: Dennstaedtia punctilobula Dipcom: Diphasiastrum complanatum Dryspp:Dryopteris species Faggra: Fagus grandifolia Gaupro: Gaultheria procumbens Goopub: Goodyera pubescens Hupluc: Huperzia lucidula Lyolig: Lyonia ligustrina Maican: Maianthemum canadense Medvir: Medeola virginiana Mitrep: Mitchella repens Monuni: Monotropa uniflora Pinstr: Pinus strobus Pruser: Prunus serotina Quealb: Quercus alba Querub: Quercus rubra Smirac: Smilacina racemosa Tribor: Trientalis borealis Tsucan: Tsuga canadensis Uvuses: Uvularia sessilifolia Unkspp: Unknown species (seedling with cotyledons only) Vaccor: Vaccinium corymbosum Vacang: Vaccinium angustifolium Vacvac: Vaccinium vacillans Vibace: Viburnum acerifolium Vibden: Viburnum dentatum Viblen: Viburnum lentago

Harvard Forest Long-Term Ecological Research 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. hf163-01-N-plants.csv N plants hf163-01-N-plants.csv 19544 e80381a3ad82479a349289af794db69b 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p16/hf163/hf163-01-N-plants.csv year year of the experiment 2006 YYYY plot plot number (1-24) plot number (1-24) treatment treatment 1 Control 2 Warm 3 Nitrogen 4 Warm Nitrogen species species code, see methods species code, see methods stems number of stems number 1 whole NA missing value 984