Modeling Habitat Occupancy of Orange‐Crowned Warblers in Managed Forests of Oregon and Washington, USA

Kroll, Andrew J.; Duke, Steven D.; Runde, Douglas E.; Arnett, Edward B.; Austin, Kelly A.

doi:10.2193/2006-037

Cited by 27 publications

(19 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the second stage, we created a set of candidate models to test the effects of the measured landscape variables on the variation seen in occupancy (ψ) among survey sites, given the modeled detection probabilities (Kroll et al 2007;Henneman and Andersen 2009;Hansen et al 2011). We grouped variables together in candidate models to test hypotheses on whether raptor presence was associated with broader patterns of land cover.…”

Section: Modeling Habitat Associationsmentioning

confidence: 99%

Habitat associations of birds of prey in urban business parks

Hogg

Nilon

2014

Urban Ecosyst

View full text Add to dashboard Cite

Section: Modeling Habitat Associationsmentioning

confidence: 99%

Habitat associations of birds of prey in urban business parks

Hogg

Nilon

2014

Urban Ecosyst

View full text Add to dashboard Cite

“…For example, several avian species, including leaf‐gleaning and shrub‐nesting birds, occurring in our study region have shown strong sensitivities to management intensity in correlative (Morrison & Meslow ; Kroll et al . ) and experimental studies (Betts et al . ).…”

Section: Introductionmentioning

confidence: 99%

Assembly dynamics of a forest bird community depend on disturbance intensity and foraging guild

Kroll

Verschuyl

Giovanini

et al. 2016

Journal of Applied Ecology

Self Cite

View full text Add to dashboard Cite

Summary Tree plantations occur globally and are often promoted as a strategy to supply wood products for an expanding human population while reducing pressure on natural forests. Herbicides can accelerate growth of crop trees by suppressing competing vegetation, but little information is available about potential trade‐offs with early seral biodiversity resulting from more intensive management. Using data collected over 5 years immediately following stand‐replacing disturbance (clear‐felling), we used a large‐scale experiment to test how environmental filtering influences dynamics of avian community assembly. We evaluated avian responses to three levels of plant cover reduction (light, moderate and intensive herbicide applications) in relation to a control without herbicide. Under the environmental filtering hypothesis, we expected reduced avian species richness and higher turnover as broadleaf plant cover decreases with increasing management intensity. We predicted that the most intensive treatments would exert strong negative effects on leaf‐gleaning insectivores, including several species of conservation concern due to long‐term population declines. Richness of leaf‐gleaning bird species was reduced by 23–52% over the 5 years on moderate (standard practice) vs. control treatments, but effects were substantially smaller for the non‐leaf‐gleaner guild in years 1–4 (8–25%) and disappeared by year 5 (0%). Both leaf‐gleaner and non‐leaf‐gleaner functional groups continued to colonize moderate and intensive treatments at higher probabilities than the control in Year 5 (range: 0·17–0·29), likely due to rapid vegetation recovery after herbicide applications ceased. Planted conifers were >35% taller and >70% larger in diameter in the two most intensive treatments, leading to substantially more wood volume produced per unit area than on stands without herbicide applications. Synthesis and applications. Under current management regimes, stand‐level trade‐offs between conservation of avian diversity and production of wood commodities may be less severe than previously recognized. However, in landscapes where biodiversity conservation rather than wood production is the primary goal, managers can adjust the trade‐off by making relatively small reductions in herbicide use that should have positive impacts on richness of leaf‐gleaning insectivorous birds.

show abstract

“…In this perspective, our results demonstrate the added value of occupancy models not only in evaluating species distribution patterns (McKenzie et al 2002), but also as a powerful tool to design grid-based population sampling for a variety of taxonomic groups, especially when detection probability needs to be maximized for analytical purposes. In fact, occupancy models are originally meant to estimate species occupancy rates (e.g., Kroll et al 2007;Mortelliti and Boitani 2007), and detection probability is therefore nothing more than a nuisance parameter. However, they can also be applied to test hypotheses concerning the main factors influencing detection probability, as recently done for bears (Boulanger et al 2008b) and other species as well (Pecari tajatu: Longoria and Weckerly 2007; butterflies: Pellet 2008).…”

Section: Discussionmentioning

confidence: 99%

Addressing challenges in non invasive capture-recapture based estimates of small populations: a pilot study on the Apennine brown bear

et al. 2010

View full text Add to dashboard Cite

It is often difficult to determine optimal sampling design for non-invasive genetic sampling, especially when dealing with rare or elusive species depleted of genetic diversity. To address this problem, we ran a hair-snag pilot study on the remnant Apennine brown bear population. We used occupancy models to estimate the performance of an improved field protocol, a meta-analysis approach to indirectly model capture probability, and simulations to evaluate the effect of genotyping errors on the accuracy of capture-recapture population estimates. In spring 2007 we collected 70 bear hair samples in 15 5 x 5 km cells, using 5 10-day trapping sessions. Bear detectability was higher in 2007 than in a previous attempt on the same population in 2004, reflecting improved field protocols and sampling design. However, individual capture probability was 0.136 (95% CI = 0.120-0.152), still below the minimum requirements of capture-mark-recapture closed population models. We genotyped hair samples (n = 63) at 9 microsatellite loci, obtaining 94% Polymerase Chain Reaction success, and 13 bear genotypes. Estimated P(IDsib) was 0.00594, and per-genotype error rate was 0.13, corresponding to a 99% probability of correct individual identification. Simulation studies showed that the effect of non-corrected or filtered genetic errors on the accuracy of population estimates was negligible only when individual capture probability was > 0.2. Our results underline how the interaction among field protocols, sampling strategies and genotyping errors may affect the accuracy of DNA-based estimates of small and genetically depleted populations, and warned us about the feasibility of a survey using only traditional hair-snag sampling. In this and similar cases, indications from pilot studies can provide cost-effective means to evaluate the efficiency of designed sampling and modelling procedures

show abstract

Modeling Habitat Occupancy of Orange‐Crowned Warblers in Managed Forests of Oregon and Washington, USA

Cited by 27 publications

References 30 publications

Habitat associations of birds of prey in urban business parks

Habitat associations of birds of prey in urban business parks

Assembly dynamics of a forest bird community depend on disturbance intensity and foraging guild

Addressing challenges in non invasive capture-recapture based estimates of small populations: a pilot study on the Apennine brown bear

Contact Info

Product

Resources

About