transect


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transect

(trăn-sĕkt′)
tr.v. tran·sected, tran·secting, tran·sects
To divide by cutting transversely.
n.
A usually straight line along which measurements or observations are made at regular intervals, as for purposes of ecological study.

tran·sec′tion n.

transect

[transekt′]
Etymology: L, trans + secare, to cut
to sever or cut across, as in preparing a cross section of tissue. See also transsect, transsection.

transect

a line across a habitat or habitats along which organisms are sampled in order to study changes that may occur along that line. Transects are most frequently used in studying changes in vegetation (often a particular species) across a physically changing habitat such as blanket bog or sand dunes. A belt transect may be considered as a widening of a line transect or as a continuous line of QUADRATS, and all plants within the belt are recorded, as opposed to only those t ouching the line in the case of the line transect. Recording in a belt transect is much more time-consuming but gives more accurate results. Association transects are very long and usually only dominant species or ASSOCIATIONS are recorded.
References in periodicals archive ?
The double-observer method was used in conjunction with the line-transect survey to test the assumption that detection was 100% on or near the transect centerline, or at the minimum available sighting distance (Buckland et al.
sti] denotes the ith scallop count in transect t within survey s, where t and s are considered random factor levels with replications, with t nested within s.
For assessment of extralimital effects of harvesting based on transect sampling, categories were treatment (samples collected in cultured plots and reference plots vs.
We found support, based on our transect survey method, for scrub-jays as habitat generalists, which is consistent with previous scrub-jay research in this area (Burt, 1996).
8220;The Missouri Transect provides groundbreaking biotechnology tools for improving crop climate resilience and educating a workforce that understands the effects of climate change on plant adaptation,” said Kelvin Chu, program director at the NSF.
Recorded sighting data included date, time, vessel latitude and longitude, vessel true heading, distance of animal from the vessel, sighting angle, 0, from the transect line, determined with an angle board (zero at bow, negative to port, positive to starboard), sighting number, species, group-size estimate (best, high, low), presence of calves, general behavior of animals, photographs (if taken), and comments pertaining to the sighting.
Linear regression analysis was used to examine whether the transect counts and hide digestion counts were correlated.
Sampling was performed in August 1995 and 1996 on 10 transects located around the whole coastline of the Gulf of Riga (Fig.
Strip transect sampling and analysis for avian habitat studies.
Across the chronosequence we observed an increase in the number of native species both per transect (Fig.