Harvard Forest

Data Archive

HF163

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

Related Publications

Data

• hf163-01: N plants (preview)

Overview

• Lead: Sydne Record, Serita Frey, Aaron Ellison
• Investigators:
• Contact: Information Manager
• Start date: 2006
• End date: 2006
• Status: complete
• Location: Prospect Hill Tract (Harvard Forest)
• Latitude: +42.54 degrees
• Longitude: -72.18 degrees
• Elevation: 365 meter
• Datum: WGS84
• Taxa:
• Release date: 2023
• Language: English
• EML file: knb-lter-hfr.163.12
• DOI: digital object identifier
• EDI: data package
• DataONE: data package
• Related links:
• Soil Warming Plus Nitrogen Addition Experiment at Harvard Forest since 2006
• Study type: short-term measurement
• Research topic: large experiments and permanent plot studies
• LTER core area: mineral cycling, disturbance patterns
• Keywords: diversity, nitrogen, soil warming
• Abstract:

  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.

• Methods:

  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

• Organization: Harvard Forest. 324 North Main Street, Petersham, MA 01366, USA. Phone (978) 724-3302. Fax (978) 724-3595.

• Project: 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. (ROR).

• Funding: National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210.

• Use: 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.

• License: Creative Commons Zero v1.0 Universal (CC0-1.0)

• Citation: Record S, Frey S, Ellison A. 2023. Short-Term Effects on Vegetation in Soil Warming Plus Nitrogen Addition Experiment at Harvard Forest 2006. Harvard Forest Data Archive: HF163 (v.12). Environmental Data Initiative: https://doi.org/10.6073/pasta/0a4973594937b0e7e7a3cbe8e3f43087.

Detailed Metadata

hf163-01: N plants

1. year: year of the experiment 2006
2. plot: plot number (1-24)
3. treatment: treatment
   • 1: Control
   • 2: Warm
   • 3: Nitrogen
   • 4: Warm Nitrogen
4. species: species code, see methods
5. stems: number of stems (unit: number / missing value: NA)