Response of woodpeckers to changes in forest health and harvest: Implications for conservation of avian biodiversity

Drever, Mark C.; Martin, Kathy

doi:10.1016/j.foreco.2009.11.038

Cited by 69 publications

(64 citation statements)

References 31 publications

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“…Persistence of woodpecker populations in protected areas requires sufficient availability of old-growth forests (e.g., Lammertink 2004) that provide woodpeckers with coarse woody debris, snags, as well as large living trees suitable for foraging and nesting (Angelstam and Mikusinski 1994, Vergara and Schlatter 2004, Drever and Martin 2010, Lorenz et al 2016. Although systematic and regular time-series data are required to assess population dynamics and demography, the results of this study largely contribute to understanding the bidecadal variation of local woodpecker populations inhabiting two national parks (Conguillío and Nahuelbuta National Parks).…”

Section: Discussionmentioning

confidence: 99%

“…The Magellanic Woodpecker lives in family groups (between two to five individuals), establishing territories that are relatively stable between seasons and consecutive years (Ojeda and Chazarreta 2014), thus making them an appropriate species to assess temporal changes in abundance (e.g., see Pasinelli 2006, Drever et al 2008, Drever and Martin 2010. Although the breeding biology and foraging behavior of Magellanic Woodpeckers have been described previously (Short 1970, Vergara and Schlatter 2004, Schlatter and Vergara 2005, Chazarreta et al 2012, Espinosa et al 2016, to date, no study has evaluated their population dynamics.…”

Section: Introductionmentioning

confidence: 99%

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Magellanic Woodpeckers in three national parks of central-southern Chile: habitat effects and population variation over the last two decades

Vergara¹,

Meneses²,

Saavedra³

et al. 2017

ACE

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ABSTRACT. A major challenge for protected areas is providing wildlife with enough suitable habitat to cope with stochastic environment and increased pressure from the surrounding landscapes. In this study, we addressed changes in local populations of Magellanic Woodpeckers (Campephilus magellanicus) occupying three national parks of central-southern Chile. We compared the breeding and postbreeding abundance of woodpeckers during the 1990s with the present (2016) abundance (n = 4 years), and assessed the extent to which abundance was explained by forest type and quality of foraging habitat (as quantified through the plant senescence reflectance index; PSRI). Results show a distinctive temporal variation in woodpecker abundance at each park, with local populations of Magellanic Woodpeckers declining by 42.2% in Conguillío National Park, but increasing by 34.3% in Nahuelbuta National Park. Woodpeckers responded to forest conditions within each park such that their abundance increased with high quality of foraging habitat, i.e., large PSRI values, and the presence of old-growth Monkey puzzle (Araucaria araucana) -Nothofagus pumilio mixed forest. Anecdotal evidence suggests that populations of woodpeckers in Conguillío National Park might have responded negatively to large-scale disturbances from recent forest fires affecting part of the forest area within park. Because stochastic events seemed to strongly mediate population changes, our findings suggest that regional conservation of Magellanic Woodpeckers requires expanding the current conservation area network in central-southern Chile. Le Pic de Magellan dans trois parcs nationaux du centre-sud du Chili : effets de l'habitat et variation des populations durant les deux dernières décenniesRÉSUMÉ. Les aires protégées font face au défi important de fournir suffisamment d'habitat propice à la faune pour compenser le côté imprévisible de l'environnement et les pressions grandissantes provenant des paysages voisins. Dans le cadre de la présente étude, nous avons évalué les changements advenus dans les populations locales du Pic de Magellan (Campephilus magellanicus) qui fréquentent trois parcs nationaux du centre-sud du Chili. Nous avons comparé les effectifs de ce pic en nidification et en post-nidification dans les années 1990 avec ceux de 2016 (n = 4 années), et évalué dans quelle mesure les effectifs étaient reliés au type forestier et à la qualité des aires d'alimentation (quantifiée par l'indice de réflectance de la sénescence végétale; en anglais PSRI). Nos résultats montrent une variation temporelle des effectifs de pics distincte dans chaque parc : la population locale de Pics de Magellan a diminué de 42,2 % dans le parc national Conguillío, mais a augmenté de 34,3 % dans le parc national Nahuelbuta. Les pics se sont adaptés aux conditions forestières dans chaque parc, de sorte que leur abondance a augmenté là où les aires d'alimentation étaient de grande qualité, c.-à-d. avec des valeurs de PSRI élevées, et en fonction de la présence de forêt mélangée âgée de ...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magellanic Woodpeckers in three national parks of central-southern Chile: habitat effects and population variation over the last two decades

Vergara¹,

Meneses²,

Saavedra³

et al. 2017

ACE

View full text Add to dashboard Cite

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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%

“…latifolia) (Bentz et al 2010;Coops and Wulder 2010). Both harvesting and the recent bark beetle outbreak are known to affect the population densities of bird species at these forest stands (Drever and Martin 2010;Norris and Martin 2010), providing an opportunity to examine how responses to disturbance vary between common and rare species.…”

Section: Introductionmentioning

confidence: 99%

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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“…tensión de las áreas arboladas (Tobalske y Tobalske 1999, Mikusinski et al 2001, Drever y Martin 2010, que son varia bles indicadoras de la integridad de los bosques. También incluimos a los colúmbidos, familia de las palomas, porque en su mayoría son granívoros y contienen especies que son muy abundantes en tierras cultivadas y urbanas (Chablé et al 2007, Howell y Webb 1995, y son buenos candidatos como indicadores de la simplificación de la estructura de la vegetación.…”

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Palomas (Columbidae), pájaros carpinteros (Picidae) y colibríes (Trochilidae) como indicadores de sucesión en la selva baja de Dzilam, Yucatán, México

Alberto¹,

Leirana-Alcocer²,

Hernández-Betancourt³

et al. 2015

Huitzil Rev. Mex. Ornitol.

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ResumenA pesar de que recientemente las selvas secundarias han aumentado su superficie mundial a costa de las primarias, el valor de las primeras para conservar la vida silvestre no está completamente entendido. En las selvas de Yucatán extensas zonas agropecuarias han sido abandonadas debido a la migración de los productores a las grandes ciudades, lo que ha permitido la regeneración de la vegetación. Esto representa una invaluable oportunidad para describir su efecto en poblaciones de aves con diferentes requerimientos ecológicos, en especial, en el área de influencia de una reserva natural. En este trabajo evaluamos las abundancias de tres familias de aves, dos que pueden ser consideradas indicadoras de la integridad de las selvas (Picidae y Trochilidae) y una como indicadora de antropización (Columbidae) en tierras agropecuarias abandonadas en la selva baja de Yucatán. Muestreamos a las aves durante 12 meses en parcelas agropecuarias con diferentes periodos de abandono: 1) 2 años o menos, 2) entre 2 y 5 años, 3) entre 5 y 10 años, y 4) más de 10 años. Todos los muestreos los realizamos con redes de niebla, en total fueron 1,440 horas/red por sitio. La abundancia de pícidos y troquílidos fue mayor en sitios con más de 10 años de abandono, mientras que los colúmbidos abundaron en los sitios de menos de 2 años. Sugerimos que la cantidad de pícidos y troquílidos puede funcionar como indicador de integridad del ecosistema, en tanto que la de los colúmbidos como indicador de sitios recientemente perturbados.Palabras clave: Abandono de tierras agropecuarias, bosque secundario, abundancia de aves. Pigeons (Columbidae), woodpeckers (Picidae) and hummingbirds (Trochilidae) as indicators of succession in the tropical dry forest of Dzilam, Yucatan, Mexico AbstractEven though the world's primary forests continues to shrink, the conservation value of secondary forest for biodiversity conservation is poorly understood. In the Yucatán Peninsula, large agricultural areas are being abandoned due to the migration of farmers to the cities; this allows for the natural regeneration of the vegetation. This provides a unique opportunity for studying its effect on the populations of birds with different ecological requirements. In this work we document the changes in abundance of three bird families, two of which could be used as indicators of forest integrity (Picidae and Trochilidae) and one more that could be used as indicator of anthropogenic disturbance of the Yucatan tropical dry forest (Columbidae). We sampled birds for one year in agricultural fragments abandoned at different times: 1) 2 years or less prior to the study, 2) from 2 to 5 years, 3) from 5 to 10 years, and 4) more than 10 years. We conducted mist netting at each sampling point for a total of 1,440 hours/net, with the same effort invested in each site. Hummingbird and woodpecker abundances were highest at sites more than 10 years old, while pigeons were more abundant at sites less than 2 years old. Our results suggest that woodpecker and hummingbird abundances co...

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Response of woodpeckers to changes in forest health and harvest: Implications for conservation of avian biodiversity

Cited by 69 publications

References 31 publications

Magellanic Woodpeckers in three national parks of central-southern Chile: habitat effects and population variation over the last two decades

Magellanic Woodpeckers in three national parks of central-southern Chile: habitat effects and population variation over the last two decades

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

Palomas (Columbidae), pájaros carpinteros (Picidae) y colibríes (Trochilidae) como indicadores de sucesión en la selva baja de Dzilam, Yucatán, México

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