Relations Between Willow Ptarmigan (Lagopus Lagopus) Density and Gyrfalcon (Falco rusticolus ) Breeding Performance in Sweden.

Falkdalen, Ulla

doi:10.4080/gpcw.2011.0217

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Icelandic gyrfalcons exhibit cyclic trends where occupancy lags spring density of ptarmigan by four years (Nielsen 2011). Falkdalen et al (2011) indicated that reproductive rates of gyrfalcons in central Sweden followed a three-year cycle where the count of breeding pairs was related to the count of nestlings produced 3 years earlier, and that the best predictor of reproductive success was the production of willow ptarmigan chicks in the prior year. In Finland (with some nests bordering on Sweden and Norway), Koskimies (2011) indicated that ptarmigan species overwhelmingly dominated the annual diet of gyrfalcons, and that fluctuations in ptarmigan had a marked effect on reproductive success.…”

Section: Temporal Cyclesmentioning

confidence: 99%

Status and trends of circumpolar peregrine falcon and gyrfalcon populations

Franke

Falk²,

Hawkshaw

et al. 2019

Ambio

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The peregrine falcon (Falco peregrinus) and the gyrfalcon (Falco rusticolus) are top avian predators of Arctic ecosystems. Although existing monitoring efforts are well established for both species, collaboration of activities among Arctic scientists actively involved in research of large falcons in the Nearctic and Palearctic has been poorly coordinated. Here we provide the first overview of Arctic falcon monitoring sites, present trends for long-term occupancy and productivity, and summarize information describing abundance, distribution, phenology, and health of the two species. We summarize data for 24 falcon monitoring sites across the Arctic, and identify gaps in coverage for eastern Russia, the Arctic Archipelago of Canada, and East Greenland. Our results indicate that peregrine falcon and gyrfalcon populations are generally stable, and assuming that these patterns hold beyond the temporal and spatial extents of the monitoring sites, it is reasonable to suggest that breeding populations at broader scales are similarly stable. We have highlighted several challenges that preclude direct comparisons of Focal Ecosystem Components (FEC) attributes among monitoring sites, and we acknowledge that methodological problems cannot be corrected retrospectively, but could be accounted for in future monitoring. Despite these drawbacks, ample opportunity exists to establish a coordinated monitoring program for Arctic-nesting raptor species that supports CBMP goals.

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Section: Temporal Cyclesmentioning

confidence: 99%

Status and trends of circumpolar peregrine falcon and gyrfalcon populations

Franke

Falk²,

Hawkshaw

et al. 2019

Ambio

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“…• Better integration within and among studies across trophic levels. For example, gyrfalcon occupancy (Falkdalen et al 2011;Nielsen 2011) and reproductive success (Barichello and Mossop 2011;Koskimies 2011) are known to depend on ptarmigan cycles. • Better integration of factors that underpin changes in phenology, demography, and abundance.…”

Section: Birds: Monitoring Statusmentioning

confidence: 99%

Arctic terrestrial biodiversity status and trends: A synopsis of science supporting the CBMP State of Arctic Terrestrial Biodiversity Report

Taylor

Lawler

Aronsson

et al. 2020

Ambio

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This review provides a synopsis of the main findings of individual papers in the special issue Terrestrial Biodiversity in a Rapidly Changing Arctic. The special issue was developed to inform the State of the Arctic Terrestrial Biodiversity Report developed by the Circumpolar Biodiversity Monitoring Program (CBMP) of the Conservation of Arctic Flora and Fauna (CAFF), Arctic Council working group. Salient points about the status and trends of Arctic biodiversity and biodiversity monitoring are organized by taxonomic groups: (1) vegetation, (2) invertebrates, (3) mammals, and (4) birds. This is followed by a discussion about commonalities across the collection of papers, for example, that heterogeneity was a predominant pattern of change particularly when assessing global trends for Arctic terrestrial biodiversity. Finally, the need for a comprehensive, integrated, ecosystem-based monitoring program, coupled with targeted research projects deciphering causal patterns, is discussed.

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“…Some of the relevant topics for research are dispersal, site fidelity, and predator-prey relationships (e.g., Nielsen andCade 1999, Booms andFuller 2003), especially fluctuations of ptarmigan and how they affect Gyrfalcon nest area occupancy, reproduction, and survival (Barichello and Mossop 2011, Falkdalen et al 2011, Potapov 2011. Monitoring and research of Gyrfalcons in Alaska can contribute to conservation of this raptor and to understanding and responding to the changes coming to high latitude plant and wildlife communities (Booms et al 2011b, Cade 2011, Huntley and Green 2011, Mossop 2011).…”

mentioning

confidence: 99%

Developing Gyrfalcon Surveys and Monitoring for Alaska.

Fuller

Schempf²,

Booms³

2011

Gyrfalcons and Ptarmigan in a Changing World

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ABSTRACT.-We developed methods to monitor the status of Gyrfalcons in Alaska. Results of surveys and monitoring will be informative for resource managers and will be useful for studying potential changes in ecological communities of the high latitudes. We estimated that the probability of detecting a Gyrfalcon at an occupied nest site was between 64% and 87% depending on observer experience and aircraft type (fixed-wing or helicopter). The probability of detection is an important factor for estimating occupancy of nesting areas, and occupancy can be used as a metric for monitoring species' status. We conclude that surveys of nesting habitat to monitor occupancy during the breeding season are practical because of the high probability of seeing a Gyrfalcon from aircraft. Aerial surveys are effective for searching sample plots or index areas in the expanse of the Alaskan terrain. Furthermore, several species of cliff-nesting birds can be surveyed concurrently from aircraft. Occupancy estimation also can be applied using data from other field search methods (e.g., from boats) that have proven useful in Alaska. We believe a coordinated broad-scale, inter-agency, collaborative approach is necessary in Alaska. Monitoring can be facilitated by collating and archiving each set of results in a secure universal repository to allow for statewide meta-analysis.

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Relations Between Willow Ptarmigan (Lagopus Lagopus) Density and Gyrfalcon (Falco rusticolus ) Breeding Performance in Sweden.

Cited by 3 publications

References 4 publications

Status and trends of circumpolar peregrine falcon and gyrfalcon populations

Status and trends of circumpolar peregrine falcon and gyrfalcon populations

Arctic terrestrial biodiversity status and trends: A synopsis of science supporting the CBMP State of Arctic Terrestrial Biodiversity Report

Developing Gyrfalcon Surveys and Monitoring for Alaska.

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