CRUI Land Use Project - Soil Respiration

Data

• hf144-01: carbon dioxide
• hf144-02: soil respiration

Overview

• Lead: Richard Bowden, Charles McClaugherty, Timothy Sipe
• Investigators:
• Contact: Richard Bowden
• Start date: 1997-05-01
• End date: 1997-10-31
• Location: Prospect Hill Tract (Harvard Forest)
• Latitude: +42.53 to +42.55
• Longitude: -72.20 to -72.17
• Elevation: 335 to 357 meters
• Taxa:
• Research topic: historical, plot, soil
• Study type: short-term measurement
• LTER core area: inorganic nutrients, disturbance
• Keywords: CO2 concentration, land use, soil, soil respiration
• Release date: 2009
• EML version: knb-lter-hfr.144.3
• Revisions:
• Related links:
• CRUI Land Use Project - Litterfall, Biomass and Productivity
• CRUI Land Use Project - Tree Canopy Leaf Area Index
• CRUI Land Use Project - Canopy Sky Factors
• CRUI Land Use Project - Herbaceous Species
• CRUI Land Use Project - Mapped Trees
• CRUI Land Use Project - Microclimate
• CRUI Land Use Project - Photosynthetic Light Response Curves
• CRUI Land Use Project - Herbaceous Stratum Sunfleck Regimes
• CRUI Land Use Project - Tree Seedlings
• CRUI Land Use Project - Herbaceous Community Composition
• CRUI Land Use Project - Soil Properties
• Abstract:

  Soil properties and processes were evaluated on three types of colonial agricultural land-use - plowing, pasturing, and selective tree removal in a woodlot that ceased in the mid to late 1800s. Plowing, the most intensive type of agricultural disturbance, mixes soil to a depth of approximately 15cm, homogenizing the soil resources and likely reducing diversity in microenvironments. Removing trees and replacing them with grasses for pasture decreases the organic matter amount and types of inputs to the system, decreasing resource diversity. Woodlots, altered by selective and chronic tree removal, would have more limited decreases in resources and microenvironments. This study examined soil surface (at 10cm above the soil surface) CO2 concentrations and soil respiration at the land use sites. Soil respiration and surface CO2 concentrations were highest in the woodlot sites and lowest in the formerly plowed sites.

• Methods:

  Intersection points within the 5m x5m grid were used as loci for measurements of soil surface CO2 concentrations and soil respiration. Concentrations and soil respiration were measured weekly from July 1997 through October 1997 using a Li-Cor 6200 gas analyzer and Li-Cor 6250 IRGA chamberhead. Concentrations were determined at 10cm above the soil surface; fluxes were measured using 10cm PVC rings that were inserted 2cm into the forest floor and were left affixed to the soil during the entire measurement period. Soil temperature (upper 5 cm of forest floor) and air temperature (at 10 cm above the soil) were measured concurrently with concentration measurements; soil temperature was measured concurrently with respiration measurements.

  Plot locations: Plow #1 Site: Prospect Hill Tract, Compartment # III, southern end. Plow #2 Site: Prospect Hill Tract, Compartment # III, southern end. Pasture #1 Site: Prospect Hill Tract, Compartment # I, southeastern edge. Pasture #2 Site: Prospect Hill Tract, Compartment # VIII, central edge. Woodlot #1 Site: Prospect Hill Tract, Compartment # VIII, northeastern edge. Woodlot #2 Site: Prospect Hill Tract, Compartment # VII, central.

• Use:

  This dataset is released to the public and may be freely downloaded. Please keep the designated Contact person informed of any plans to use the dataset. Consultation or collaboration with the original investigators is strongly encouraged. Publications and data products that make use of the dataset must include proper acknowledgement. For more information on LTER Network data access and use policies, please see: http://www.lternet.edu/data/netpolicy.html.

• Citation:

  Bowden R, McClaugherty C, Sipe T. 2009. CRUI Land Use Project - Soil Respiration. Harvard Forest Data Archive: HF144.

Detailed Metadata

hf144-01: carbon dioxide

1. Site: site
   • P1: Plow 1
   • P2: Plow 2
   • S1: Pasture 1
   • S2: Pasture 2
   • W1: Woodlot 1
   • W2: Woodlot 2
2. Row: row within site (B-F)
3. Stake: column number within row (1-10)
4. Date: date of CO2 Measurement (YYYY-MM-DD)
5. Hour: hour of CO2 Measurement (HH)
6. Minute: minute of CO2 Measurement (mm)
7. SoilTemp: soil temperature in upper 5cm of soil (celsius )
8. AirTemp: ait temperature at 10cm above ground (celsius )
9. CO2Conc: CO2 concentration (ppm CO2) (dimensionless )

hf144-02: soil respiration

1. Site: site
   • P1: Plow 1
   • P2: Plow 2
   • S1: Pasture 1
   • S2: Pasture 2
   • W1: Woodlot 1
   • W2: Woodlot 2
2. Row: row within site (B-F)
3. Stake: column within row (1-10)
4. Date: date of soil respiration measurement (YYYY-MM-DD)
5. SoilResp: soil respiration rate (milligramsPerMeterSquaredPerHectare )
6. SoilTemp: soil temperature in upper 5cm of soil (celsius )