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How human infrastructure threatens biodiversity by squeezing sandy coasts.

Curr Biol
Lansu EM, Fischman HS, Angelini C, Hijner N, Geelen L, Groenendijk D, Höfer S, Kooijman AM, Rietkerk M, Tonkens S, de Vries S, Wassen M, van Weerlee E, Wille D, Reijers V, van der Heide T.   +15 more
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Tempo and drivers of 3D eye size evolution in temperate butterflies. [PDF]

Evol Lett
Halali S, Hall SA, Pettersson LB, Carrié R, Caplat P, Baird E, Wahlberg N.   +6 more
europepmc   +1 more source

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Line Transect Methods for Plant Surveys

Biometrics, 2007
SummaryInterest in surveys for monitoring plant abundance is increasing, due in part to the need to quantify the rate of loss of biodiversity. Line transect sampling offers an efficient way to monitor many species. However, the method does not work well in some circumstances, for example on small survey plots, when the plant species has a strongly ...
Buckland, S. T., Borchers, D. L., Johnston, A., Henrys, P. A., Marques, T. A.   +4 more
openaire   +5 more sources

Adaptive Line Transect Sampling

Biometrics, 2002
Adaptive line transect sampling offers the potential of improved population density estimation efficiency over conventional line transect sampling when populations are spatially clustered. In adaptive sampling, survey effort is increased when areas of high animal density are located, thereby increasing the number of observations.
J H, Pollard, D, Palka, S T, Buckland
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Incorporating Covariates into Standard Line Transect Analyses

Biometrics, 2003
Summary. An implicit assumption of standard line transect methodology is that detection probabilities depend solely on the perpendicular distance of detected objects to the transect line. Heterogeneity in detection probabilities is commonly minimized using stratification, but this may be precluded by small sample sizes. We develop a general methodology
Marques, Fernanda F. C., Buckland, Stephen T.   +1 more
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Line Transect Sampling in Small and Large Regions

Biometrics, 2005
SummaryMelville and Welsh(2001,Biometrics57,1130–1137) consider an approach to line transect sampling using a separate calibration study to estimate the detection functiong. They present a simulation study contrasting their results with poor results from a traditional estimator, labeled the “Buckland” estimator and referenced toBuckland et al.(1993 ...
Rachel M, Fewster, Jeffrey L, Laake, Stephen T, Buckland   +2 more
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Sequential Estimation in Line Transect Surveys

Biometrics, 2002
This article considers using sequential procedures to determine the amount of survey effort required in a line transect survey in order to achieve a certain precision level in estimating the abundance of a biological population. Sequential procedures are constructed for both parametric and nonparametric animal abundance estimators.
Yip, PSF, Zhou, Y, Chen, SX
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On the Line Transect Sampling Method

Biometrics, 1974
Theory has been developed in the present paper for estimating wildlife density and its standard error by the line transect method of sampling using both right angle and radial distances and based on different assumptions than those made by Gates et al. [1968]. It is shown that relatively better fits are realized when the assumptions are tested with the
Sen, A. R., Tourigny, J., Smith, G. E. J.   +2 more
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Size Bias in Line Transect Sampling

Biometrics, 1987
Line transect sampling is used to estimate the number of individuals in a study area. It is usually assumed that the detections of individuals constitute independent events, and that the probability of detecting an item is a function of its perpendicular distance from the transect.
Drummer, Thomas D., McDonald, Lyman L.
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Line transects

2001
Abstract The purpose of this chapter is to illustrate the application of the theory of Chapter 3 to line transect data, and to present the strategies for analysis outlined in Section 2.5. In general, the parameter f (0) in a line transect analysis does not have a closed form estimator. That is, for most models f(0) cannot be expressed as
S T Buckland, D R Anderson, K P Burnham, J L Laake, D L Borchers, L Thomas   +5 more
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