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• W3177065462 endingPage "107542" @default.
• W3177065462 startingPage "107542" @default.
• W3177065462 abstract "Edge effect is a strong driver of change in fragmented landscapes. In the last few decades, agricultural land-use intensity at field scale has increased and, consequently, the edges between crops and natural vegetation matrix have sharpened. Interspersed crops produce now negative effects not only by direct habitat destruction, but also by inputs of agrochemicals that may spread their effects on the surroundings. These processes are taking place worryingly in steppe habitats in Iberian Peninsula where the high diversity of bird communities and other taxa they hold is at risk. The aims of this study were to evaluate the edge effect of crops on i) the microhabitat quality of a natural landscape matrix and ii) the space use of a threatened habitat-specialist steppe bird, the Dupont’s lark ( Chersophilus duponti ). We carried out microhabitat sampling and bird surveys within and around crops interspersed in a typical Iberian shrub-steppe matrix during spring and autumn 2016 and spring 2017. Microhabitat quality was measured by sampling vegetation structure and arthropod biomass (as proxy of food availability) within and at increasing distances (1, 10 and 50 m) to seven crops. The intensity of space use by the Dupont’s lark was estimated applying a Kernel density function on the spatial point pattern of the males’ territories. Vegetation structure variables were summarized by Principal Components Analysis. Linear Mixed Models and model averaging were used to test for effects of distance to crop on microhabitat quality and space use by the Dupont’s lark. Distance to crop significantly affected microhabitat quality. A patchy structure of herbaceous and shrub was found outside crops in all sampling dates, with more shrub cover and less herbaceous cover as the distance to crops increased. Biomass of hypogeous arthropods significantly decreased when the distance to crops was lower than 50 m. The intensity of space use by Dupont’s lark varied according to the sampling date, being higher in spring, and as the distance to crops and the biomass of hypogeous arthropods increased. Negative effects of crops on the space use of this bird species might be shaped both by the effect of the crop itself and by its edge effect on hypogeous arthropods. Our results point to an edge effect of crops of 10–50 m on natural vegetation structure, arthropod availability and use of space by the Dupont`s lark, which suggests that the effective area of optimal habitat available for true steppe species could be overestimated. • Microhabitat quality was measured within and at distances of 1,10 and 50 m to crops. • Crops negatively affect vegetation structure and arthropod biomass beyond crop limits. • Hypogeous arthropod biomass is positively related to the space use by Dupont’s lark. • This edge effect affects habitat-use patterns by the Dupont’s lark, an endangered species. • Use of space by the Dupont’s lark was significantly greater at 50 m from the crop edge." @default.
• W3177065462 created "2021-07-05" @default.
• W3177065462 creator A5037953556 @default.
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• W3177065462 creator A5087003380 @default.
• W3177065462 date "2021-10-01" @default.
• W3177065462 modified "2023-09-24" @default.
• W3177065462 title "Crops modify habitat quality beyond their limits" @default.
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• W3177065462 doi "https://doi.org/10.1016/j.agee.2021.107542" @default.
• W3177065462 hasPublicationYear "2021" @default.
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