Harvard Forest Data Archive

HF134

Tree Canopy Leaf Area Index in CRUI Land Use Project at Harvard Forest 1997

Related Publications

Data

• hf134-01: leaf area index (preview)

Overview

• Lead: Timothy Sipe, Richard Bowden, Charles McClaugherty
• Investigators: Dax Bennett, Heather Frankland, Melissa Kibler, Amanda Lodge
• Contact: Information Manager
• Start date: 1997
• End date: 1997
• Status: completed
• Location: Prospect Hill Tract (Harvard Forest)
• Latitude: +42.53 to +42.55
• Longitude: -72.20 to -72.17
• Elevation: 335 to 357 meter
• Taxa:
• Release date: 2009
• Revisions:
• EML file: knb-lter-hfr.134.10
• DOI: digital object identifier
• EDI: data package
• DataONE: data package
• Related links:
• Litterfall, Biomass and Productivity in CRUI Land Use Project at Harvard Forest 1996-1997
• Canopy Sky Factors in CRUI Land Use Project at Harvard Forest 1998
• Herbaceous Species in CRUI Land Use Project at Harvard Forest 1996
• Mapped Trees in CRUI Land Use Project at Harvard Forest 1996-2006
• Microclimate in CRUI Land Use Project at Harvard Forest 1997
• Photosynthetic Light Response Curves in CRUI Land Use Project at Harvard Forest 1998
• Herbaceous Stratum Sunfleck Regimes in CRUI Land Use Project at Harvard Forest 1998
• Tree Seedlings in CRUI Land Use Project at Harvard Forest 1996
• Herbaceous Community Composition in CRUI Land Use Project at Harvard Forest 1996
• Soil Properties in CRUI Land Use Project at Harvard Forest 1995-1998
• Soil Respiration in CRUI Land Use Project at Harvard Forest 1997
• Study type: short-term measurement
• Research topic: historical and retrospective studies; large experiments and permanent plot studies; physiological ecology, population dynamics and species interactions
• LTER core area: primary production, disturbance
• Keywords: canopy cover, land use, leaf area index
• Abstract:

  Numerous variables related to land use disturbance and recovery processes can influence forest composition and structure. We’ve measured differences in forest communities in six sites that were formerly plowed, pastured, or continuously forested woodlots in Prospect Hill. None of the sites had noticeable canopy gap disturbance at the time of the measurements. Leaf area index (LAI) was measured with an LAI-2000 plant canopy analyzer (Li-Cor, Inc., Lincoln, NE) at all 77 edge and interior intersection points in the 30 m x 50 m permanent plot (7 columns x 11 rows) in 5 of our 6 land use sites. Under-canopy measurements were made in each site over 25-30 minutes during midday hours (11:00-2:30 EST) on overcast days near solstice (June 13, 18). The under-canopy readings were contrasted with an open-sky measurement taken in an open field near the Harvard Forest headquarters just before beginning data collection in each site.

  LAI averaged 3.98 and ranged from 2.28 to 5.93 across all sites. W1 had the highest site-level mean (4.62) and maximum (5.93) LAI while S2 had the lowest values (mean = 3.41, max = 4.55). The woodlot also showed the greatest spatial variation as measured by C.V., while plow #1 showed the least variation.

• Methods:

  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 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.

• Citation:

  Sipe T, Bowden R, McClaugherty C. 2009. Tree Canopy Leaf Area Index in CRUI Land Use Project at Harvard Forest 1997. Harvard Forest Data Archive: HF134 (v.10). Environmental Data Initiative: https://doi.org/10.6073/pasta/3cb647633e53670d409161d35a6f81cf.

Detailed Metadata

hf134-01: leaf area index

1. location: individual grid stakes where LAI measurements were made (1-77)
2. plow.1: LAI for Plow 1 (unit: dimensionless / missing value: NA)
3. plow.2: LAI for Plow 2 (unit: dimensionless / missing value: NA)
4. past.1: LAI for Pasture 1 (unit: dimensionless / missing value: NA)
5. past.2: LAI for Pasture 2 (unit: dimensionless / missing value: NA)
6. wood.1: LAI for Woodlot 1 (unit: dimensionless / missing value: NA)