quadrat

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Related to quadrats: quadrat sampling

quad·rat

 (kwŏd′rət, -răt′)
n.
1. Printing A piece of type metal lower than the raised typeface, used for filling spaces and blank lines. Also called quad2.
2. Any of a group of small, usually rectangular plots of land used for sampling the occurrence of species or of archaeological artifacts.

[Middle English, a square geometric instrument, rectangular area; see quadrate.]

quadrat

(ˈkwɒdrət)
n
1. (Botany) ecology an area of vegetation, often one square metre, marked out for study of the plants in the surrounding area
2. (Environmental Science) the frame used to mark out such an area
[C14 (meaning "a square"): variant of quadrate]

quad•rat

(ˈkwɒd rət)

n.
2. a square or rectangular plot of land marked off for the study of plants and animals.
[1675–85; variant of quadrate]

quadrat

a plot of land, square or rectangular, marked off or set out for the study of plant or animal life.
See also: Animals
References in periodicals archive ?
In September and October 2012, we sampled sixty-three 200-m2 quadrats across the 6 study sites.
2] quadrats (polyvinyl chloride pipe) were spaced equidistant from each other across the length of the transect.
We measured molt habitat vegetation with 17 quadrats at molting sites for Wood Thrushes.
The introduction is also where the surveys methods are most fully described, with emphasis on the spatially random stratified sample of 500x500m quadrats, begun in the second field season, that occupy a total of about 5 per cent of three strata defined principally by elevation above sea level.
Before the beginning of the field studies, the territory of Daugavpils City was mapped in a regular grid, and quadrats of 500 m x500 m were obtained.
The same quadrats used in 1993 were used in the present study (2010) to examine changes in the peatlands over the past 17 years.
The trays were marked with string to create 12 roughly equal-sized quadrats, a common technique in ecological research, to facilitate data collection.
Based on visual observations of inundation, soil saturation, and watermarks on surrounding vegetation, hydrology between the two sites was similar except in the Fall of 2001, at the start of the investigation, when about one-third of the quadrats in the constructed wetland had no visual signs of inundation, soil saturation, or watermarks on surrounding vegetation.