Details and Metadata
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The methods followed in the creation of the dataset, including description of field, laboratory and processing steps, and quality control procedures
Twenty sugar maple trees used for foliage sampling.
One 75 X 50 m plot used for soil, litter, throughfall and precipitation collections.
Leaf samples collected from north and south sides of tree; from lower, middle and upper canopy. Samples of leaves were collected once in mid-July and once in mid-August to obtain a measure of the maximum nitrogen pool. Foliar nutrient concentrations are most stable in this time frame.
Leaf litter traps collected twice weekly. One litter trap was placed under each tree, positioned so that minimal litter would fall in from surrounding trees. Leaf litter was collected throughout the leaf drop period (September 20-October 22).
Throughfall collections consisted of two funnel collectors under each of five trees, on north and south sides of tree. Plus two collectors in an open area in close proximity to the site to collect rain as a control.
Leaf tissue analysis
After each sampling, leaf tissue was run through a leaf area meter, assigned a thrips damage index number, oven dried at 70 degrees C to a constant weight and ground in a Wiley mill.
Detailed documentation of the fields comprising the dataset, including the type of measurement, units where applicable, and any controlled vocabularies or code lists present in the data
Equipment and software used to collect data, including how that equipment was used.
Dionex Ion Chromatograph Model 2010i was used to analyze nitrate.
Flow injection analysis
Lachat Quick Chem AE flow injection analysis was used to test ammonium colorimetrically.
Leeman Laboratories CHN CE440 Elemental Analyzer was used to determine total nitrogen.
Leaf litter traps, funnel precipitation colle
Leaf litter traps. Funnel precipitation collectors.
Pole pruners, ladders and rope climbing equip
Pole pruners, ladders and rope climbing equipment.
The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection
- Site Description
Stevensville Brook watershed, west slope of Mt. Mansfield, northern hardwood forest.
- Site Description
The site is in the drainage of Nettle Brook, a small tributary to the north branch of Stevensville Brook.