Migration of Birds as an Indicator of Broad-Scale Environmental Condition

Tankersley, Roger D.

doi:10.1023/b:emas.0000016879.82499.b6

Cited by 8 publications

(4 citation statements)

References 2 publications

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“…Transition in prevalence from migrants to residents and especially the unique sensitivity of Neotropical migrants to disturbance have also been reported previously (Flather and Sauer, 1996;Tankersley, 2004). Interestingly, another related study found that abundance of many overwintering passerines known to feed on juniper fruit increased concomitantly with juniper encroachment in Oklahoma (Coppedge et al, 2001c).…”

Section: Discussionsupporting

confidence: 71%

Development of a Grassland Integrity Index Based on Breeding Bird Assemblages

Coppedge

Engle

Masters

et al. 2006

Environ Monit Assess

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We utilized landscape and breeding bird assemblage data from three Breeding Bird Survey (BBS) routes sampled from 1965-1995 to develop and test a grassland integrity index (GII) in a mixed-grass prairie area of Oklahoma. The overall study region is extensively fragmented from long-term agricultural activity, and native habitat remnants have been degraded by recent encroachment of woody vegetation, namely eastern red cedar (Juniperus virginiana L.). The 50 individual bird survey points along the BBS routes, known as stops, were used as sample sites. Our process first focused on developing a grassland disturbance index (GDI) as a measure of cumulative landscape disturbances for these sites. The GDI was based on five key landscape variables identified in an earlier species-level study of long-term avian community dynamics: total tree, shrub, and herbaceous vegetation cover indices, overall mean landscape patch size, and grassland patch core size. The GII was then developed based on breeding bird assemblage data. Assemblages were based on commonly used response guilds reflective of five avian life history parameters: foraging mode/location, nesting location, habitat specificity, migratory pattern, and dietary guild. We tested the response of 78 candidate assemblage metrics to the GDI, and eliminated those with no or poor response or with high correlations (redundant), resulting in 13 metrics for use in the final index. Individual metric scores were scaled to fall between 0 and 10, and the cumulative index to range from 0 to 100. Although broader application and refinement are possible, the avian-based GII has an advantage over labor-intensive, habitat-based monitoring in that the GII is derived from readily available long-term BBS data. Therefore, the GII shows promise as an inexpensive tool that could easily be applied over other areas to monitor changes in regional grassland conditions.

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Section: Discussionsupporting

confidence: 71%

Development of a Grassland Integrity Index Based on Breeding Bird Assemblages

Coppedge

Engle

Masters

et al. 2006

Environ Monit Assess

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“…Stored energy reserves and tailwinds influence route selection (Purcell and Brodin 2007 ), but the route chosen may influence a species’ population dynamics (Cohen et al 2017 ). As our findings suggest, natural barriers condition the routes (Feng et al 2021 ) and habitat loss acts as a barrier (Jia et al 2021 ; Tankersley 2004 ).…”

Section: Discussionmentioning

confidence: 72%

The effects of cities on quail (Coturnix coturnix) migration: a disturbing story of population connectivity, health, and ecography

Nadal,

Sáez,

Volponi

et al. 2024

Environ Monit Assess

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The increasing impact of human activities on ecosystems is provoking a profound and dangerous effect, particularly in wildlife. Examining the historical migration patterns of quail (Coturnix coturnix) offers a compelling case study to demonstrate the repercussions of human actions on biodiversity. Urbanization trends, where people gravitate toward mega-urban areas, amplify this effect. The proliferation of artificial urban ecosystems extends its influence across every biome, as human reliance on infrastructure and food sources alters ecological dynamics extensively. We examine European quail migrations pre- and post-World War II and in the present day. Our study concentrates on the Italian peninsula, investigating the historical and contemporary recovery of ringed quail populations. To comprehend changes in quail migration, we utilize trajectory analysis, open statistical data, and linear generalized models. We found that while human population and economic growth have shown a linear increase, quail recovery rates exhibit a U-shaped trajectory, and cereal and legume production displays an inverse U-shaped pattern. Generalized linear models have unveiled the significant influence of several key factors—time periods, cereal and legume production, and human demographics—on quail recovery rates. These factors closely correlate with the levels of urbanization observed across these timeframes. These insights underscore the profound impact of expanding human populations and the rise of mega-urbanization on ecosystem dynamics and services. As our planet becomes more urbanized, the pressure on ecosystems intensifies, highlighting the urgent need for concerted efforts directed toward conserving and revitalizing ecosystem integrity. Simultaneously, manage the needs and demands of burgeoning mega-urban areas. Achieving this balance is pivotal to ensuring sustainable coexistence between urban improvement and the preservation of our natural environment.

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“…This means that the distribution of suitable habitat can be a factor causing white-naped cranes to make migratory flights that are longer than necessary on the basis of distance alone. Effects of habitat characteristics on routes of avian migration and abundance of migrating birds en route have also been investigated in birds other than cranes (Carlisle et al 2004;Tankersley 2004).…”

Section: Modeling and Defined Hypothesis Testsmentioning

confidence: 99%

Satellite tracking and avian conservation in Asia

Higuchi

Pierre

2005

Landscape Ecol Eng

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Using satellite tracking, we have followed the migration of birds in Asia for more than 10 years. We have investigated the migration patterns of around 15 species of birds, focusing on, but not limited to, cranes (Gruidae) and storks (Ciconiidae). To relay bird locations, we employed platform transmitter terminals in combination with ARGOS satellites. Location data were then utilized in a variety of applications, from determining migration routes, stopover patterns and wintering sites, through more advanced analyses including using various data overlays to examine habitat use, occupation of nature reserves, differential migration patterns between adults and juvenile birds, and the connectivity and network structure of migration pathways. We have also developed recommendations for spatial improvements to nature reserves. We emphasize the importance of continued empirical research and development of analytical methodologies involving satellite location data in concert with effecting conservation outcomes using satellite-derived data.

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Migration of Birds as an Indicator of Broad-Scale Environmental Condition

Cited by 8 publications

References 2 publications

Development of a Grassland Integrity Index Based on Breeding Bird Assemblages

Development of a Grassland Integrity Index Based on Breeding Bird Assemblages

The effects of cities on quail (Coturnix coturnix) migration: a disturbing story of population connectivity, health, and ecography

Satellite tracking and avian conservation in Asia

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