How much and at what scale? Multiscale analyses as decision support for conservation of saproxylic oak beetles

Bergman, Karl‐Olof; Jansson, Nicklas; Claesson, Kenneth; Palmer, Michael W.; Milberg, Per

doi:10.1016/j.foreco.2011.10.030

Cited by 73 publications

(61 citation statements)

References 36 publications

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“…In the present study, the occupancy patterns of the two beetles formed a perfectly nested hierarchy, where E. ferrugineus was in no place present where O. eremita was absent (when considering the combined window, pitfall and pheromone trap results). Occupancy relationships between the two species generally conform to a similar pattern, with both species found in similar habitats, but with E. ferrugineus occupying a more exclusive subset of habitat patches (Svensson et al 2004, Tolasch et al 2007, Ranius et al 2011, Bergman et al 2012, Musa et al 2013. Note that there are also exceptions where E. ferrugineus is found without O. eremita, including Great Britain (where only E. ferrugineus is present).…”

Section: Potental For Pheromone-based Trapped Indicator Speciesmentioning

confidence: 59%

“…The sites are located in a broader landscape dominated by coniferous forests and arable fields. The number of large oaks per site varied (range from 0.1 to 6 large oaks ha -1 when considering a circle with radius 327 m around the traps) and this has implications for the occurrence of individual species (Bergman et al 2012, Musa et al 2013.…”

Section: Background Of Trapping Methodology and Datasets Used In Thismentioning

confidence: 99%

“…O. eremita is able to sustain viable populations for extended time periods in very small patches of suitable trees, and its present distribution thus primarily reflects historical patterns of continuity of hollow trees. In contrast, E. ferrugineus exhibits greater overall fluctuations in population density ) and appears to be more affected by diminishing habitat resources and fragmentation than many other saproxylic species (Ranius et al 2010, 2011, Bergman et al 2012, Musa et al 2013. Its presence may thus be a sensitive indicator for sufficient habitat quality and connectivity required for the long-term persistence of many vulnerable species.…”

Section: Potental For Pheromone-based Trapped Indicator Speciesmentioning

confidence: 98%

“…Population studies with pheromone-baited traps have suggested that population sizes of O. eremita and E. ferrugineus may sometimes be comparable, but that the latter exhibits considerably higher population fluctuations , 2011. E. ferrugineus also depends on hollow tree resources at larger spatial scales than O. eremita (Ranius et al 2011, Bergman et al 2012, Musa et al 2013. Consequently, E. ferrugineus could be a very sensitive and cost-effective indicator of the biological effects of landscape fragmentation, especially given the novel potential for sampling with a highly attractive and species-specific pheromone.…”

Section: Introductionmentioning

confidence: 99%

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High-accuracy sampling of saproxylic diversity indicators at regional scales with pheromones: The case of Elater ferrugineus (Coleoptera, Elateridae)

Andersson¹,

Bergman²,

Андерссон³

et al. 2014

Biological Conservation

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The rare beetle Elater ferrugineus was sampled at 47 sites in the county of Östergötland, Sweden by means of pheromone-baited traps to assess its value as an indicator species for hollow oak stands rich in rare saproxylic beetle species. In addition, Osmoderma eremita was also sampled with pheromone baits. These data were then compared against species survey data collected at the same sites by pitfall and window traps. Both species co-occur with many Red Listed saproxylic beetles, with E. ferrugineus being a somewhat better indicator for the rarest species. The conservation value of a site (measured as Red List points or number of Red Listed species) increased with the number of specimens of E. ferrugineus and O. eremita caught. Accuracy of sampling by means of pheromone trapping turned out to be radically different for the two model species. E. ferrugineus traps put out during July obtained full accuracy after only 6 days, whereas O. eremita traps needed to be out from early July to mid-August in order to obtain full accuracy with one trap per site. By using E. ferrugineus, or preferably both species, as indicator species, accuracy would increase and costs decrease for saproxylic biodiversity sampling, monitoring and identification of hotspots.

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Section: Potental For Pheromone-based Trapped Indicator Speciesmentioning

confidence: 59%

Section: Background Of Trapping Methodology and Datasets Used In Thismentioning

confidence: 99%

Section: Potental For Pheromone-based Trapped Indicator Speciesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-accuracy sampling of saproxylic diversity indicators at regional scales with pheromones: The case of Elater ferrugineus (Coleoptera, Elateridae)

Andersson¹,

Bergman²,

Андерссон³

et al. 2014

Biological Conservation

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“…Therefore, wetland management and habitat restoration efforts cannot just focus on the wet grasslands patches, but need to expand into the surrounding landscape and include both pattern and process. This complexity of wader conservation thus requires taking a landscape approach perspective [3,69,[113][114][115]. This implies the inclusion of both entire ecological systems at multiple spatial scales, and social systems in terms of managers and governors of land use at multiple levels [116].…”

Section: Towards Governance Of Wet Grasslands As a Green Infrastructurementioning

confidence: 99%

Wet Grasslands as a Green Infrastructure for Ecological Sustainability: Wader Conservation in Southern Sweden as a Case Study

et al. 2016

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Abstract:Biosphere Reserves aim at being role models for biodiversity conservation. This study focuses on the unsuccessful conservation of waders (Charadrii) on wet grasslands in the Kristianstad Vattenrike Biosphere Reserve (KVBR) in southern Sweden. Predation on nests and young has been proposed as one reason contributing to the decline of waders. We explored this hypothesis by comparing two landscapes, one with declining (KVBR) and one with stable (Östergötland) wader populations on managed wet grasslands in southern Sweden. Specifically, we tested three predictions linked to predation on wader nests and young, namely that (1) the relative abundance of avian predators and waders; (2) the avian predator abundance; and (3) the predation rate on artificial wader nests, should all be higher in declining versus stable populations. All predictions were clearly supported. Nevertheless, predation may not be the ultimate factor causing wader population declines. We discuss the cumulative effects of landscape change linked to increased food resources for predators, reduced wet grassland patch size and quality. Holistic analyses of multiple wet grassland landscapes as social-ecological systems as case studies, including processes such as predation and other factors affecting waders, is a promising avenue towards collaborative learning for wet grasslands as a functional green infrastructure. However, if governance and management approaches can be improved is questionable without considerable investment in both ecological and social systems.

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Multi‐scale effects of habitat loss and the role of trait evolution

Bagawade,

van Benthem,

Wittmann

2024

Ecology and Evolution

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Habitat loss (HL) is a major cause of species extinctions. Although the effects of HL beyond the directly impacted area have been previously observed, they have not been modelled explicitly, especially in an eco‐evolutionary context. To start filling this gap, we study a two‐patch deterministic consumer‐resource model, with one of the patches experiencing loss of resources as a special case of HL. Our model allows foraging and mating within a patch as well as between patches. We then introduce heritable variation in consumer traits related to resource utilization and patch use to investigate eco‐evolutionary dynamics and compare results with constant and no trait variation scenarios. Our results show that HL in one patch can indeed reduce consumer densities in the neighbouring patch but can also increase consumer densities in the neighbouring patch when the resources are overexploited. Yet at the landscape scale, the effect of HL on consumer densities is consistently negative. Patch isolation increases consumer density in the patch experiencing HL but has generally negative effects on the neighbouring patch, with context‐dependent results at the landscape scale. With high cross‐patch dependence and coupled foraging and mating preferences, local HL can sometimes even lead to landscape‐level consumer extinction. Eco‐evolutionary dynamics can rescue consumers from such extinction in some cases if their death rates are sufficiently small. More generally, trait evolution had positive or negative effects on equilibrium consumer densities after HL, depending on the evolving trait and the spatial scale considered. In summary, our findings show that HL at a local scale can affect the neighbouring patch and the landscape as a whole, where heritable trait variation can, in some cases, alleviate the impact of HL. We thus suggest joint consideration of multiple spatial scales and trait variation when assessing and predicting the impacts of HL.

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How much and at what scale? Multiscale analyses as decision support for conservation of saproxylic oak beetles

Cited by 73 publications

References 36 publications

High-accuracy sampling of saproxylic diversity indicators at regional scales with pheromones: The case of Elater ferrugineus (Coleoptera, Elateridae)

High-accuracy sampling of saproxylic diversity indicators at regional scales with pheromones: The case of Elater ferrugineus (Coleoptera, Elateridae)

Wet Grasslands as a Green Infrastructure for Ecological Sustainability: Wader Conservation in Southern Sweden as a Case Study

Multi‐scale effects of habitat loss and the role of trait evolution

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