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The use of kernel estimators to determine the distribution of groundwater level

100%

Michalski A.

Meteorology Hydrology and Water Management. Research and Operational Applications

2016

tom 04

nr 1

In this paper the problem of non-parametric estimation of the probability density function for hydrological data is considered. For a given random sample X1, X2, ..., Xn we define an estimator fˆn of the density function ƒ based on a function K of a real variable – the so-called kernel of a distribution – and a properly chosen number sequence {hn} from the interval (0, ∞). This estimator of density function of a random variable X under more general assumptions is known in the statistical literature as the Parzen-Rosenblatt estimator or the kernel estimator. The method of kernel estimation presented in the paper has been applied to determine the probability distribution of the groundwater level based on long-term measurements made in the melioration research carried out at the foothill object Długopole.

Interannual fidelity to roosting habitat and flight paths by female western barbastelle bats

58%

Hillen J., Kiefer A., Veith M.

Acta Chiropterologica

2010

tom 12

nr 1

The roost area selection of reproductive female western barbastelles was examined throughout four study seasons (2004–2007) via radio-tracking and automated acoustic monitoring. We specifically analysed the spatial structure of the roosting habitat and roost fidelity including a flight path connecting the roosts. We radio-tracked 13 colony members to 46 natural roosts, mainly dead oaks with large pieces of loose bark. Simultaneous tracking of four pairs of females revealed the existence of subgroups and fission-fusion-behaviour in Barbastella barbastellus. The colony displayed fidelity to the roost area rather than to single roost trees, although some trees were reused in two or three study seasons. Bimodal activity patterns obtained from acoustic monitoring indicated that the flight path connecting two core roosting areas functioned as a commuting corridor.

Ograniczanie wyników

1 Acta Chiropterologica

1 Meteorology Hydrology and Water Management. Research and Operational Applications

1 Hillen J.

1 Kiefer A.

1 Michalski A.

1 Veith M.

1 2016

1 2010

Wyniki wyszukiwania

The use of kernel estimators to determine the distribution of groundwater level

Interannual fidelity to roosting habitat and flight paths by female western barbastelle bats