Rectangular frame used to demarcate a part of the substrate for detailed analysis
For other uses, see Quadrat (disambiguation).
A quadrat used to measure the percentage cover of certain species.
A quadrat is a frame used in ecology, geography, and biology to isolate a standard unit of area for study of the distribution of an item over a large area. Quadrats are traditionally square, but modern quadrats can be rectangular, circular, or irregular.[1][2] A quadrat is suitable for sampling or observing plants, slow-moving animals, and some aquatic organisms.
A photo-quadrat is a photographic record of the area framed by a quadrat. It may use a physical frame to indicate the area, or may rely on fixed camera distance and lens field of view to automatically cover the specified area of substrate.[3] Parallel laser pointers mounted on the camera can also be used as scale indicators. The photo is taken perpendicular to the surface, or as close as possible to perpendicular for uneven surfaces.
^Wheater, C. Philip; et al. (2011). Practical Field Ecology: Project Guide. John Wiley and Sons.
^Littler, M. M.; Littler, D. S. (1985). "Nondestructive sampling". Handbook of Phycological Methods. Vol. 4. Ecological Field Methods: Macroalgae. Cambridge, UK: Cambridge University Press. pp. 161–175. ISBN 9780521249157.
item over a large area. Quadrats are traditionally square, but modern quadrats can be rectangular, circular, or irregular. A quadrat is suitable for sampling...
power-line communication network. The city's tourism slogan is "Leben im Quadrat" ("Life in the Square"). A brick kiln excavated in 1929 in the Seckenheim...
such as in Germany. Unusually shaped fruits and vegetables Melonen nun im Quadrat, Arbeiter-Zeitung, 1978-08-21, p. 5 (Austrian Newspaper, German) Molding...
placing quadrats over the line, starting the quadrat at the first marked point of the line. Any consistent measurement size for the quadrat and length...
Cire (cover of the France Gall song Poupée de cire, poupée de son) - 2:27 Quadrat im Kreis (square in the circle) - 3:27 Cruising - 2:16 Anrufbeantworter...
"Cleopatra"; A filling stroke is a character indicating the end of a quadrat that would otherwise be incomplete. Some signs are the contraction of several...
Germany Country of origin Germany Owner Matthias Seidel Axel Springer SE e-quadrat Created by Matthias Seidel Founder(s) Matthias Seidel CEO Matthias Seidel...
Allgemeine Lehrsätze in Beziehung auf die im verkehrten Verhältnis des Quadrats der Entfernung wirkenden Anziehungs- und Abstoßungskräfte (Original book:...
in Morgan, Paul (2002). "The Use of the Long 's' in Britain: a Note". Quadrat (15): 23–28. Archived from the original on 28 May 2023. Retrieved 28 May...
Quadrat Elahi Rahman Shafique (1 November 1962 – 25 February 2009) was a Colonel in the Bangladesh Army who died in the 2009 Bangladesh Rifles mutiny...
Waltham, Massachusetts. Gibbes Museum of Art, Charleston, South Carolina. Quadrat Museum, Bottrop, West Germany. Mississippi Museum of Art, Jackson, Mississippi...
used for building on Burial plot, a piece of land a person is buried in Quadrat, a defined area of land used for an ecological study Robert Plot (1640–1696)...
the results were as follows: Main Post Office, constructed 1921-1923 The Quadrat is a museum housing permanent exhibitis on local history and displaying...
are to be installed in a pedestrian zone. UNESCO Berlin Art Europa zum Quadrat Tagesspiegel Berlin's vision of global unity Deutsche Welle Official Website...
Retrieved 21 June 2019. "FC Luzern – Trainerhistorie" (in German). e-quadrat communications gmbh. Archived from the original on 4 March 2016. Retrieved...
which are sampling areas or volumes of any size or shape. For example, a quadrat could be a 0.25 × 0.25-meter square plot for counting small plants, a 0...
Quadrilateral, in geometry Quad poster, a common UK size of film poster Quadrat, in ecology, a small study area or a frame used to define it Quadrupel...
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