Woodpeckers increase in abundance but maintain fecundity in response to an outbreak of mountain pine bark beetles

Edworthy, Amanda B.; Drever, Mark C.; Martin, Kathy

doi:10.1016/j.foreco.2010.10.006

Cited by 64 publications

(67 citation statements)

References 37 publications

(56 reference statements)

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“…These increases in prey species can be caused, for example, by periods of weed growth during winter and spring (Holland et al, 2004). Similarly, other animals which prey on beetles may disproportionally decrease populations of certain beetles during times of increased resource needs, such as when predatory species have young to provide for, or declines in other food supplies (Edworthy et al, 2011;Koplin, 1972). Therefore, sampling ground-active beetles at different times of the year in our study area may reveal different distribution patterns to those observed in our surveys.…”

Section: Effect Of Sampling Timingmentioning

confidence: 99%

Plantations, not farmlands, cause biotic homogenisation of ground-active beetles in south-eastern Australia

Sweaney

Driscoll

Lindenmayer

et al. 2015

Biological Conservation

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a b s t r a c tFollowing landscape change, species invasions and extinctions may lead to biotic homogenisation, resulting in increased taxonomic and functional similarity between previously distinct biotas. Biotic homogenisation is more likely to occur in landscapes where the matrix contrasts strongly with native vegetation patches. To test this, we examined the distribution of ground-active beetles in a landscape of remnant Eucalyptus open woodland patches where large areas of lower contrast matrix (farmland) are being transformed to high-contrast pine plantations in south-eastern Australia. We sampled beetles from 30 sites including six replicates of five categories; (1) remnants adjacent to farmland, (2) remnants adjacent to plantation, (3) farmland, (4) plantation, and, (5) remnants between pine plantation and farmland. Community composition in the pine matrix was similar to native patches embedded in pine (ANOSIM, Global R = 0.49, P < 0.000), which we suggest is due to biotic homogenisation. Remnant patches with edges of both farmland and pine plantation did not represent an intermediate community composition between patches surrounded by either matrix type, but rather a unique habitat with unique species. Farmland supported the greatest number of individuals (F = 9.049, df = 25, P < 0.000) and species (F = 5.875, df = 25, P = 0.002), even compared to native remnant patches. Our results suggest that matrix transformations can reduce species richness and homogenise within-patch populations. This may increase the risk of species declines in fragmented landscapes where plantations are not only replacing native vegetation patches, but also other matrix types that may better support biodiversity. Our findings are particularly concerning given expanding plantation establishment worldwide.

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Section: Effect Of Sampling Timingmentioning

confidence: 99%

Plantations, not farmlands, cause biotic homogenisation of ground-active beetles in south-eastern Australia

Sweaney

Driscoll

Lindenmayer

et al. 2015

Biological Conservation

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“…Old forest excavators may be more limited by food supply and foraging sites than availability of nest sites Drapeau et al, 2009;Edworthy et al, 2011). Recommendations for structural retention based solely on nest-site requirements neglects foraging needs of these excavators (Drapeau et al, 2009).…”

Section: Other Considerations For Structural Retentionmentioning

confidence: 99%

Nest-site selection by old boreal forest cavity excavators as a basis for structural retention guidelines in spatially-aggregated harvests

Cooke

Hannon

2012

Forest Ecology and Management

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“…Trees retained after harvest were mostly aspen and veteran Douglas fir. Further details on the study sites can be found in Drever and Martin (2010) and Edworthy et al (2011).…”

Section: Study Sitesmentioning

confidence: 99%

“…An outbreak of mountain pine beetle (MPB) occurred in this area, peaking in 2004 and killing almost all lodgepole pine (Drever et al 2009;Edworthy et al 2011). MPB emerge and fly to new areas during summer.…”

Section: Mountain Pine Beetle Outbreakmentioning

confidence: 99%

“…Bird populations may change during the outbreak due to increases in the availability Biodivers Conserv (2011) 20:3555-3575 3557 of MPBs, dead trees, and other invertebrates colonizing the dead trees. The increase in invertebrates and dead trees resulted in higher woodpecker populations, consequently cavity availability also increased after the outbreak (Drever and Martin 2010;Edworthy et al 2011). The eventual collapse of beetle-affected trees and the subsequent change in forest structure may have also affected bird populations.…”

Section: Mountain Pine Beetle Outbreakmentioning

confidence: 99%

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The efficacy of common species as indicators: avian responses to disturbance in British Columbia, Canada

2011

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Common species can be major drivers of species richness patterns and make major contributions to biomass and ecosystem function, and thus should be important targets for conservation efforts. However, it is unclear how common species respond to disturbance, because the underlying reasons for their commonness may buffer or amplify their responses to disturbance. To assess how well common species reflect changes in their community (and thus function as indicator species), we studied 58 bird species in 19 mixed conifer patches in northern British Columbia, Canada, between 1998 and 2010. During this time period two disturbance events occurred, stand level timber harvest and a regionalscale bark beetle outbreak. We examined relationships among densities of individual species, total bird density and overall species richness, correlations in abundance among species, and responses to disturbance events. We found three broad patterns. First, densities of common species corresponded more strongly with changes in total bird density and overall species richness than rare species. These patterns were non-linear and species with intermediate-high commonness showed similar or better correspondence than the most common species. Second, common species tended to be more strongly correlated with abundances of all other species in the community than less-common species, although on average correlations among species were weak. Third, ecological traits (foraging guild, migratory status) were better predictors of responses to disturbance than species commonness. These results suggest that common species can collectively be used to reflect changes in the overall community, but that whenever possible monitoring programs should be extended to include species of intermediate-high commonness and representatives from different ecological guilds.

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Woodpeckers increase in abundance but maintain fecundity in response to an outbreak of mountain pine bark beetles

Cited by 64 publications

References 37 publications

Plantations, not farmlands, cause biotic homogenisation of ground-active beetles in south-eastern Australia

Plantations, not farmlands, cause biotic homogenisation of ground-active beetles in south-eastern Australia

Nest-site selection by old boreal forest cavity excavators as a basis for structural retention guidelines in spatially-aggregated harvests

The efficacy of common species as indicators: avian responses to disturbance in British Columbia, Canada

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