Recent population trends of Ontario's forest birds were assessed by integrating results across 8 bird surveys to provide an estimate of trend status for all of Ontario, and for 2 forested regions of Ontario separately. Surveys with mid-and longterm trends were relied on most extensively in this assessment. Comparison of the first and second Breeding Bird Atlases was especially important for estimating trends in northern forests, but overall reliability of status assessments in the north was considered poor due to limited coverage and significant potential for bias. Trends of most forest birds were stable or positive at the Ontario-wide scale, with trends at least as positive as forest birds elsewhere in North America, and showing more positive trends overall than birds of agricultural landscapes. Nevertheless, individual species trends ranged from large declines to large increases, and several forest birds have been added to Species at Risk lists largely because of population declines. There were few differences in trend status among forest birds grouped by habitat association or migratory guild, although all 5 aerial insectivore species have declined. Better monitoring coverage of the boreal will be needed if improved reliability of trends is desired in the near future.Key words: Ontario, forest birds, boreal forest, population trend, bird surveys, monitoring reliability RÉSUMÉLes fluctuations récentes des populations d' oiseaux forestiers de l'Ontario ont été évaluées au moyen de l'intégration des résultats de 8 relevés d' oiseaux pour produire un estimé de la tendance actuelle pour tout l'Ontario ainsi que particulière-ment pour 2 régions forestières de la province. Les relevés indiquant les fluctuations à moyen et à long terme ont fait l' objet d'une utilisation plus poussée pour cette évaluation. La comparaison entre le premier et le second atlas des oiseaux nicheurs a été particulièrement importante pour pouvoir estimer les fluctuations dans les forêts boréales, mais la fiabilité générale des tendances actuelles dans le nord de la province a été jugée faible compte tenu de la couverture restreinte et du potentiel significatif de biais. Les fluctuations de la plupart des populations d' oiseaux forestiers se sont révélées être stables ou positives pour l' ensemble de la province, ces fluctuations étant au moins aussi positives par rapport aux oiseaux forestiers ailleurs en Amérique du Nord et elles étaient encore plus positives dans l' ensemble par rapport aux oiseaux des milieux agricoles. Néanmoins, les fluctuations des espèces individuelles variaient entre des déclins importants et des accroissements majeurs et quelques oiseaux forestiers ont été ajoutés à la liste des espèces en péril principalement suite à un déclin des populations. Peu de différence a été relevée pour ce qui est des tendances chez les oiseaux forestiers regroupés en fonction de leur habitat ou de leur regroupement migratoire, même si 5 espèces insectivores se nourrissant en vol sont en déclin. Une meilleure étude des territoire...
Bird population monitoring should be designed to enhance conservation of birds through informing policy decisions and management actions. Many different bird surveys are undertaken in Ontario ranging from province-wide multi-species programs such as the Ontario Breeding Bird Atlas to single-species localized surveys for Species at Risk. Although most surveys provide some useful contributions towards understanding the status of bird populations, there remain significant gaps in both species and geographic coverages, especially in the northern half of the province, and few surveys are sufficient for evaluating the specific effects of current management practices on birds. Enhancing bird monitoring in the province should first involve clearly defining, quantitatively, the information required for management, conservation and decision-making, in the context of an adaptive management cycle, and then identifying the most cost-effective monitoring programs to obtain that information. This can most effectively be implemented through a cooperative effort involving all parties with an interest in bird monitoring data including federal and provincial government agencies, environmental non-government organizations, and industry. For personal use only.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.