To breed or not to breed: Territory occupancy is predicted by reproductive performance and habitat heterogeneity DOI Creative Commons
Andrés López‐Peinado, Navinder J. Singh, Vicente Uríos

et al.

Ecological Applications, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 10, 2024

Abstract Species life history and anthropogenic influence are important drivers of population performance viability in human‐dominated ecosystems. How these factors affect habitat selection occupancy long‐lived species is an topic for their conservation. Long‐term datasets needed establishing the underlying this process. In 22 year‐long study, we conducted annual surveys Bonelli's eagle east Iberian Peninsula. During period, 42.8% known territories remained unoccupied. Territories with a higher likelihood raising two chicks over time were stable, evidenced by lower coefficient variation productivity, more likely to remain occupied. Moreover, diversity, dominated coniferous forest or agricultural fields, those located further away from coast at altitudes showed rates (i.e., unoccupied >3 consecutive years). To validate associations, monitored space use individuals equipped Global Positioning System/Global System Mobile (GPS/GSM) transmitters, which confirmed that eagles selected open habitats (mainly scrublands transitional woodland‐scrubs) intermixed areas within home ranges. contrast, avoided agricultural, urban, continuous forests breeding line observations territories. Our results highlight interplay between natural factors, also have implications other raptor species. Preservation most productive re‐occupancy along reducing threats preferred fundamental actions should be taken immediately sustain viable populations. Potential management include enhancing prey density through restoration conservation, mitigating mortality risks due power lines, fences, poisoning, maintaining heterogeneity eagles' hunting activities.

Language: Английский

Synergistic effects of habitat composition and weather on reproduction of a sharply declining farmland bird in Central Europe DOI Creative Commons
Miroslav Šálek,

Stephanie S. Mayer,

Dana Rymešová

et al.

Landscape Ecology, Journal Year: 2025, Volume and Issue: 40(5)

Published: April 29, 2025

Language: Английский

Citations

0
A comprehensive analysis of spatial and temporal patterns of anthropogenic adult mortality of Bonelli's eagles in eastern Spain DOI Creative Commons
Andrés López‐Peinado, Vicente Uríos, Pascual López‐López

et al.

Journal of Wildlife Management, Journal Year: 2024, Volume and Issue: 88(8)

Published: Aug. 1, 2024

Abstract In eastern Spain, Bonelli's eagle ( Aquila fasciata ) abundance has declined almost 50% in the last 25 years and, consequently, species is listed as regionally endangered. Therefore, aim of this study to report mortality causes territorial breeding eagles, including spatial and temporal patterns, assess effects on population dynamics. From 2015–2023, we tracked 60 eagles via global positioning system‐global system for mobile communications (GPS‐GSM) telemetry; 33 died (median survival time = 1,519 days). Survival did not differ relation sex, age at capture (subadult vs. adult birds), site (coastland inland territories), or transmitter's model. One‐year probability (95% CI) was 0.716 (0.607–0.845); 2‐year 0.640 (0.524–0.781); 3‐year 0.581 (0.464–0.729). Anthropogenic (66.7% cases) prevailed over natural (27.3%) unknown (6.0%). Causes were intra‐ interspecific predation (24.2% cases), electrocution (18.2%), poisoning (15.1%), collision with power lines (9.1%), shooting drowning other man‐made infrastructure (6.1%), disease (3.0%). Deaths most frequent during early season. Only 2 (6.1%) deaths recorded occurred within a protected area. Natural more away from Mediterranean coast. contrast, anthropogenic near coast, where human density high. We estimated that extirpation our area 17.8% next 50 99.2% 100 years. Nonetheless, small reduction by ≥15% could prevent actions reduce are urgently needed preserve Spain.

Language: Английский

Citations

2
To breed or not to breed: Territory occupancy is predicted by reproductive performance and habitat heterogeneity DOI Creative Commons
Andrés López‐Peinado, Navinder J. Singh, Vicente Uríos

et al.

Ecological Applications, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 10, 2024

Abstract Species life history and anthropogenic influence are important drivers of population performance viability in human‐dominated ecosystems. How these factors affect habitat selection occupancy long‐lived species is an topic for their conservation. Long‐term datasets needed establishing the underlying this process. In 22 year‐long study, we conducted annual surveys Bonelli's eagle east Iberian Peninsula. During period, 42.8% known territories remained unoccupied. Territories with a higher likelihood raising two chicks over time were stable, evidenced by lower coefficient variation productivity, more likely to remain occupied. Moreover, diversity, dominated coniferous forest or agricultural fields, those located further away from coast at altitudes showed rates (i.e., unoccupied >3 consecutive years). To validate associations, monitored space use individuals equipped Global Positioning System/Global System Mobile (GPS/GSM) transmitters, which confirmed that eagles selected open habitats (mainly scrublands transitional woodland‐scrubs) intermixed areas within home ranges. contrast, avoided agricultural, urban, continuous forests breeding line observations territories. Our results highlight interplay between natural factors, also have implications other raptor species. Preservation most productive re‐occupancy along reducing threats preferred fundamental actions should be taken immediately sustain viable populations. Potential management include enhancing prey density through restoration conservation, mitigating mortality risks due power lines, fences, poisoning, maintaining heterogeneity eagles' hunting activities.

Language: Английский

Citations

0