The decline of Cantabrian capercaillie: How much does habitat configuration matter?

Quevedo, Mario; Bañuelos, María José; Obeso, José Ramón

doi:10.1016/j.biocon.2005.07.019

Cited by 46 publications

(61 citation statements)

References 51 publications

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“…Some topographic features also differed among groups: broodless hens were located in summer in more northern and rugged exposures than were cocks. Shifting up the spatial scale of analysis, we found that hens with broods were located in the most suitable areas for the species according to a previous habitat suitability map, mainly characterized by high proportion of forest cover at large spatial scales (Quevedo et al 2006a). Overall, in summer, capercaillie were sighted closer to forest edges than to spring display grounds, as evidenced by the increased importance of open areas in their surroundings.…”

Section: Discussionmentioning

confidence: 85%

“…We used an existing habitat suitability map for capercaillie in the area (Quevedo et al 2006a) to compare the predicted habitat suitability corresponding to sightings of hens with broods, cocks and broodless hens at the landscape scale. This habitat suitability map was developed from a logistic model, using the information of display grounds, so that the characteristics of presence areas (i.e., occupied leks) and absence areas (i.e., abandoned leks) were compared in a grid of 25 ha habitat units.…”

Section: Habitat Suitabilitymentioning

confidence: 99%

“…This habitat suitability map was developed from a logistic model, using the information of display grounds, so that the characteristics of presence areas (i.e., occupied leks) and absence areas (i.e., abandoned leks) were compared in a grid of 25 ha habitat units. See Quevedo et al (2006a) for details on model construction and suitability maps. The model merged both natural and anthropogenic factors as relevant in determining the probability of capercaillie occurrence and identified the spatial scale of their effects.…”

Section: Habitat Suitabilitymentioning

confidence: 99%

“…The Cantabrian capercaillie is no exception to this (Quevedo et al 2006b). A habitat suitability map, aimed as a conservation tool, was developed for this population from data corresponding to occupied and abandoned leks (Quevedo et al 2006a). However, the validity of this map to predict suitable habitat for hens with broods remained to be tested.…”

Section: Introductionmentioning

confidence: 99%

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Habitat partitioning in endangered Cantabrian capercaillie Tetrao urogallus cantabricus

2008

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The endangered Cantabrian capercaillie (Tetrao urogallus cantabricus) lives at the southern edge of tetraonids' distribution range, in entirely deciduous forests. Its conservation planning has been always lek-centred. There is very little information about the specific habitat requirements of hens and broods, even though reproductive success appears to be a limiting factor. We analysed summer surveys from 1997 to 2004, carried out to estimate the reproductive success of the population. We compared the habitat characteristics at different spatial scales of hens with broods, broodless hens, and cocks in summer, with the better known spring habitat in display areas. Summer habitat showed higher proportion of open areas and was associated with more rugged zones at moderate spatial scales (78 ha) than spring habitat at display areas. Cocks and hens showed summer habitat partitioning; hens were associated with higher proportions of open and shrubby habitats. Furthermore, broodless hens preferred areas with higher slope variability than the display and summer areas preferred by cocks. These differences may reflect the sexual dimorphism of the species in reproductive role, energetic demands and conspicuousness. At larger spatial scales a previously developed habitat suitability model performed well to predict good brood-rearing areas. Hens with broods were located in the best-preserved areas in the range, mainly characterized by higher proportion of forest cover at a large (50 km 2 ) scale. We suggest that these characteristics indicate refuge habitats where Cantabrian capercaillie can still breed successfully.

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Section: Discussionmentioning

confidence: 85%

Section: Habitat Suitabilitymentioning

confidence: 99%

Section: Habitat Suitabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Habitat partitioning in endangered Cantabrian capercaillie Tetrao urogallus cantabricus

2008

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“…In order to control for individual factors known to influence ADV epidemiology in wild boar (i.e., sex and age; Vicente et al 2005), we used the individual ADV serostatus of wild boars (n=545; binomial, i.e., seronegative or seropositive) as response variable. Then, bivariate models were performed, retaining the one with the lowest AIC and subsequently we used a forward procedure (see Quevedo et al 2006). We fitted the models with a logit link function and a binomial error.…”

Section: Statistical Analysesmentioning

confidence: 99%

Epidemiological risk factors of Aujeszky’s disease in wild boars (Sus scrofa) and domestic pigs in Spain

et al. 2008

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An Aujeszky's disease (AD) control and eradication campaign started in Spain in 1995, and as a result, AD virus (ADV) seroprevalences have notably diminished in Spanish domestic pig herds, but eradication has not yet been achieved. Since the presence of ADV in Spanish wild boar populations can impede schemes to eradicate ADV in domestic pig, we conducted analyses of risk factors and investigated associations between the patterns of ADV seroprevalence at the municipal level in the wild boar and the domestic pig, respectively, in south-central Spain. There was a clear influence of individual factors on the risk of wild boar to test positive to ADV. Concerning the domestic pig, higher ADV seroprevalences were observed with increasing numbers of pigs per farm. Indoor pig farms showed higher seroprevalences than open-air farms. Our results show that, at least at the study scale, the level of ADV seroprevalence in domestic pig farms is not influenced by the level of ADV seroprevalence in the coexisting wild boar populations. Also, there was no influence of domestic pigs ADV seroprevalence on the risk of wild boars to test seropositive. Finally, there was no evidence for a statistical association between ADV seroprevalence levels in wild boar and domestic pig at the municipal level in the study region. These findings are of interest for both veterinary and public health authorities. Nevertheless, more effort is needed in order to elucidate the nature of particular ADV outbreaks in domestic pigs in the study region due to possible contacts with wild boars, which will probably require a molecular approach.

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Range loss of a threatened grouse species is related to the relative abundance of a mesopredator

et al. 2017

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Citation: K€ ammerle, J.-L., J. Coppes, S. Ciuti, R. Suchant, and I. Storch. 2017. Range loss of a threatened grouse species is related to the relative abundance of a mesopredator. Ecosphere 8(9):e01934. 10. 1002/ecs2.1934 Abstract. Mammalian generalist mesopredators can reach high densities in forest-farmland mosaic landscapes in the absence of top-down control. The abundance of generalist mesopredators is a potentially limiting factor for prey populations, especially ground breeding birds such as grouse. High mesopredator abundance has been associated with reduced reproductive success in grouse. There is little evidence, however, on how variation in mesopredator abundance affects grouse population trends while considering other environmental covariates. We make use of range maps spanning two decades (1993-2013) of a locally threatened capercaillie (Tetrao urogallus) population in the Black Forest, Germany, to assess whether range loss of grouse in forest-farmland mosaic landscapes can be explained by a gradient in red fox abundance, while accounting for other potential determinants of grouse range loss. We show that capercaillie range persistence was favored by increasing snow cover, decreasing index of red fox abundance, slightly increasing index for soil quality, and increasing population connectivity. Red fox abundance had the largest relative impact in areas already facing an elevated capercaillie extinction risk due to unsuitable site conditions, dense forests, or lack of connectivity, but the negative effect was compensated under otherwise optimal conditions. This indicates that the relative importance of predator abundance for prey population dynamics is mediated by environmental attributes, emphasizing the threat to remnant populations but also indicating potential for species conservation.

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The decline of Cantabrian capercaillie: How much does habitat configuration matter?

Cited by 46 publications

References 51 publications

Habitat partitioning in endangered Cantabrian capercaillie Tetrao urogallus cantabricus

Habitat partitioning in endangered Cantabrian capercaillie Tetrao urogallus cantabricus

Epidemiological risk factors of Aujeszky’s disease in wild boars (Sus scrofa) and domestic pigs in Spain

Range loss of a threatened grouse species is related to the relative abundance of a mesopredator

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