quadrat sampling

quadrat sampling

(in statistics) a method of examining the distribution of organisms by taking samples within squares of known size, normally 1 m2. Such squares are selected at random and marked usually with wire outlines. A series of quadrats is usually sampled so that comparisons are possible between, say, the distribution of a given plant in two different areas. The mean number in each series of quadrats can be compared. see SIGNIFICANCE.
References in periodicals archive ?
A comparison of the effectiveness of timed searches vs quadrat sampling in mussel surveys.
In April 2014 to March 2015, quadrat sampling by divers, experimental fishing surveys, and retrieval of clams detached from the fishing gear were conducted monthly.
To estimate the density and dispersion patterns of Inflated Heelsplitters and other unionid mussels in the Amite River, we used quantitative quadrat sampling modified after Strayer and Smith (2003).
This quantitative survey employed a quadrat sampling technique with multiple random starts.
The methods of estimating grasshopper numbers vary from state to state and include quadrat sampling, ring estimations, binomial sampling, pan trapping, roadside counts, and transect or visual estimation (Legg et al.
Thus, the quadrat sampling method produced adequate estimates of the actual seed density oc curring at each point.
Samples of 45 colonies each from the NKB, SKB, KBO, and HAW populations were collected following a nested quadrat sampling design modified from Greig Smith (1979).
Different techniques have been used to assess diversity and abundance of stream and spring salamanders, including dip netting (Nowakowski and Maerz, 2009), quadrat sampling (Jung et al.
This quantitative survey employed two types of quadrat sampling techniques.