Occurrence of Eurasian Skylark Alauda arvensis territories in relation to urban area and heterogeneous farmland

Figures & data

Figure 1. Map of the study area in close vicinity to the city of Vienna (CORINE 2012). All 12 sampling plots were located within agricultural areas.

Table 1. Effects of z-transformed predictor variables on the occurrence of territorial Skylarks based on 100 m buffer circles around each presence/absence point. Non-back-transformed model-averaged coefficients (full-model averaging) with adjusted standard errors (se) and relative importance (RI) of the best models (93 out of 32768 models within ΔAICc < 6) are shown.

	Estimate	se	RI
Intercept	0.18	0.14	–
Autocovariate	3.08	0.19	1
Woody area	−0.93	0.17	1
Urbanized area	−0.57	0.12	1
Cereals	0.45	0.09	1
Distance to next track	0.44	0.07	1
Distance to next road	0.22	0.07	1
Julian day	−0.17	0.07	0.98
Legum	0.17	0.07	0.97
Cultivated 3	−0.16	0.08	0.92
Distance to next building	0.14	0.07	0.92
Grass	0.10	0.08	0.76
Rapeseed	0.07	0.07	0.64
Cultivated 1	−0.08	0.08	0.63
Habitat heterogeneity	−0.08	0.09	0.59
Cultivated 2	−0.01	0.04	0.27
Maize	0.002	0.03	0.23

CORINE Land Cover Classification. 2012. Umweltbundesamt GmbH, data.umweltbundesamt.at.

 Google Scholar