Sentence examples for point transect from inspiring English sources

Floating aquatic macrophytes may be surveyed visually from the bank-side of an urban lake in a 10 m radius point transect (Buckland et al., 2001).

Lastly, additional R&D effort is required on improvements to integrated EO/in situ approaches, including uncertainties in upscaling point, transect and area data [46]), stratification schemes for improved precision of AGB change estimates and maximising the use of sample data (e.g., when there are limited or missing samples).

Marques et al. (2011) presented an example of standard point transect sampling, in particular a cue-counting approach, to estimate right whale Eubalaena japonica density in the Bering Sea.

We used detrended correspondence analysis to 1) identify primary patterns of bird communities surveyed from 2006 to 2011 at point transects, 2) estimate ecological scale of change needed to achieve treatment objectives from the relative dissimilarity of survey points to the ordination region delineating sagebrush bird communities, and 3) measure changes in pre- and posttreatment bird communities.

The distance y corresponds to a perpendicular or radial distance depending on whether line or point transects are used.

The methods rely on the random placement of a sufficiently large number of line or point transects over the area of interest.

The fundamental differences between fixed and towed sensors in passive acoustics relates to the geometry of the problem, with fixed sensors akin to point transects, and towed sensors akin to line transects.

Often overlooked, but strictly an assumption, the above formula is only useful because the distribution of animals π y) is assumed to be known: uniform for line transects, and triangular for point transects.

However, for highly mobile animals and in particular for point transects (in which by definition the observer stands still), even random movement can lead to considerable overestimation of density.

For 101 sites established across a disturbance gradient, we conducted 505 point-transect surveys to measure avian community structure, 505 vegetation plots to quantify stand-level structure, and measured deforestation at the landscape-level.

On the US West coast, experiments are being conducted with free-drifting buoy recorders with a vertical hydrophone array for point-transect sampling to estimate cetacean abundance (J. Barlow, personal communication).