quadrate

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quadrate

1. one of a pair of bones of the upper jaw of fishes, amphibians, reptiles, and birds that articulates with the lower jaw. In mammals it forms the incus
2. of or relating to this bone
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References in periodicals archive ?
As a result Spearman's rank co- efficient tests were used to correlate both species and functional richness with exotic cover at the alpha (quadrat) scale (n = 508) for all sites combined with a P < 0.05.
The density of each species was recorded as number of individuals per quadrat and the relative density was calculated using the formula
Thus, in spite of changes in supervision and methodology of the project and variation in quadrat numbers, our longer term data parallels the findings of Morgan and Nield (2011) and supports their prediction that stand-level changes in dominance are likely to occur in B.
At each of the 25 sites, a 0.60 [m.sup.2] (0.6 m x 1.0 m) quadrat was placed on the ground in an area where the damage was very consistent with the visual score for the site.
Means are averaged from station means, which are weighted averages of leaf lengths since variable numbers of leaves were measured at a station, depending on whether a given species was present within each quadrat. Species/Year 2012 2014 Halodule wrightii 23.1 [+ or -] 5.6 (49) 19.0 [+ or -] 6.1 (47) Halophila engelmanii 6.8 [+ or -] - (1) 5.1 [+ or -] 1.7 01) Ruppia maritima 6.7(*) [+ or -] - (1) 17.1 [+ or -] 8.1 (11) Species/Year 2015 Halodule wrightii 16.6 [+ or -] 4.8 (37) Halophila engelmanii 3.5 [+ or -] 1.0(2) Ruppia maritima 19.7 [+ or -] 11.0 (30) (*) Leaf length of R.
Appropriate transect lines and sampling quadrats were made based on the total area of the study site for vegetation data collection.
a is the area of the quadrat. n is the mean number of sea cucumber per quadrat.
To estimate the biomass, quantitative samples were collected at each sample coverage (SC) sampling point by scraping the 50 cm X 50 cm quadrat. Biomass in each quadrat was calculated by measuring the fresh weight (FW) of the samples within the quadrat.
All live and dead mussels were collected per quadrat and identified following Howells et al.
The collection of orthopterans was carried out by sweep netting, using 300 sweeps within each quadrat in each meadow.
To determine distribution patterns and densities (abundance per cubic meters) of Atlantic silverside larvae in the field, 4 sampling devices were used: 1) a cylindrical polycarbonate quadrat (with a diameter of 0.5 m to sample the land-water interface); 2) an aquarium net, 19.05x26.03 cm with 500-[micro]m mesh, to collect larval samples in water that was 0.05-0.80 m deep; 3) a plankton net with a diameter of 0.2 m, length of 0.6 m, and 200-[micro]m mesh to collect samples in water 0.15-0.91 m deep, and 4) a second plankton net with a diameter of 0.5 m, length of 1.8 m, and 100-[micro]m mesh to collect samples in water with depths slightly greater than 1 m.