Avian Conservation and Ecology最新文献

{"title":"Comparing waterfowl densities detected through helicopter and airplane sea duck surveys in Labrador, Canada","authors":"Amelia R. Cox, S. Gilliland, E. Reed, C. Roy","doi":"10.5751/ace-02260-170224","DOIUrl":"https://doi.org/10.5751/ace-02260-170224","url":null,"abstract":"","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drought disrupts year-round breeding readiness in a tropical songbird","authors":"J. Boersma, Erik D. Enbody, J. Karubian, H. Watts, H. Schwabl","doi":"10.5751/ace-2343-170244","DOIUrl":"https://doi.org/10.5751/ace-2343-170244","url":null,"abstract":"","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70964271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding widespread declines for Common Terns across inland North America: productivity estimates, causes of reproductive failure, and movement of Common Terns breeding in the large lakes of Manitoba","authors":"Jennifer M Arnold, S. Oswald, S. Wilson, P. Szczys","doi":"10.5751/ace-02067-170114","DOIUrl":"https://doi.org/10.5751/ace-02067-170114","url":null,"abstract":"Common Tern (Sterna hirundo) breeding populations in inland North America have declined significantly since the 1970s. A 2012 survey of the large Manitoba lakes, previously the largest known inland population stronghold, reported a 57–67% decline in 20 years. A further 38% decline by 2017 highlights the urgent need for research and management. We use ground-based estimates of productivity and analysis of microsatellite markers to provide the first detailed insight into breeding status and movements of Common Terns in this region. At six breeding colonies in 2012, we recorded breeding success in fenced plots, counted fledglings, documented predators and floods, and collected blood samples for microsatellite analysis of movement. Productivity ranged from 0.0 to 2.0 chicks fledged per nest, being highest at large colonies (> 1000 nests) located far away from human settlements (20–30 km). Large-scale breeding failure from predation occurred at smaller colonies close to human settlement. The most common predators were Blackcrowned Night Herons (Nycticorax nycticorax) and Great Horned Owls (Bubo virginianus), but we also report three novel predators: Bald Eagles (Haliaeetus leucocephalus), gray wolves (Canis lupus), and river otters (Lontra canadensis). Microsatellite analysis suggested little eastward emigration, but instead a 100-fold increase in immigration from the Great Lakes between the 1990s and 2010s. Substantial population declines in the Manitoba Lakes despite this influx imply that net losses are occurring within inland-breeding populations. Terns now appear to switch frequently between breeding colonies in the region, possibly in response to predation and/or flooding. Although some colonies achieved productivity during the one-year study, continued population decline indicates that monitoring and studies of adult survival and movement are needed, especially given the on-going environmental changes within the region. Only by coupling these data with further efforts in unsurveyed boreal regions can the status of inland-breeding Common Terns be determined and strategies developed to curb apparent, large-scale population declines. Comprendre la diminution généralisée de Sternes pierregarins dans les régions intérieures de l'Amérique du Nord : productivité, causes de l'échec de la reproduction et déplacements des Sternes pierregarins nichant sur les grands lacs du Manitoba RESUME_. Les populations nicheuses de Sternes pierregarins (Sterna hirundo) dans les régions intérieures de l'Amérique du Nord ont diminué de façon marquée depuis les années 1970. Un relevé réalisé en 2012 sur les grands lacs du Manitoba, qui constituaient auparavant le plus grand bastion connu de la population intérieure, a révélé une baisse de 57 à 67 % en 20 ans. Une nouvelle diminution de 38 % en 2017 souligne le besoin urgent de recherche et de gestion. Nous avons utilisé des estimations de productivité réalisées sur le terrain et l'analyse de marqueurs microsatellites po","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"7 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70961452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soil management of olive groves has contrasting effects on nest densities and reproductive success of tree-nesting passerines","authors":"J. C. Castro-Caro, I. Barrio, Francisco Sánchez Tortosa","doi":"10.5751/ace-02038-170110","DOIUrl":"https://doi.org/10.5751/ace-02038-170110","url":null,"abstract":"Agri-environmental measures aim at mitigating the negative impacts of modern agriculture on farmland biodiversity. For example, soil management practices can positively influence the abundance and diversity of songbirds in olive groves by enhancing habitat and food availability. However, little is known about their potential implications on the breeding success of these species. We monitored nest density and breeding performance of tree-nesting birds in 17 olive groves of southern Spain under two contrasting soil management regimes (with and without herbaceous cover) over three years. We analyzed breeding success by examining the transitions between different stages of the breeding cycle for three common cardueline finches: Common Linnet (Linaria cannabina), European Greenfinch (Chloris chloris), and European Serin (Serinus serinus). Breeding success of songbirds was low (19% of 88 nests for L. cannabina, 16% of 196 nests for C. chloris, and 38% of 234 nests for S. serinus). Many nests were abandoned prior to egg laying and nesting failure was highest between egg laying and hatching. Nest predation (56.6%) was the main cause of nest loss. Although soil management regimes did not influence breeding success, the presence of herbaceous cover had opposing effects on nest densities of the three species: groves with herbaceous cover had higher nest densities for greenfinches, lower for serins, and this treatment had no effect on Common Linnet. Other factors, like disturbances due to management activities or interannual weather variation may have a larger impact on nesting success than soil management regimes, at least for some species and for specific stages of their breeding cycle. The fact that nest densities of some birds were negatively affected by soil treatments associated with agri-environmental actions aimed at benefiting biodiversity raises the question of the general applicability of these measures for conservation. La gestion des sols d'oliveraies a des effets différents sur la densité de nids et le succès de reproduction de passereaux nichant dans les arbres RÉSUMÉ. Les mesures agro-environnementales visent à atténuer les effets négatifs de l'agriculture moderne sur la biodiversité des terres agricoles. Par exemple, les pratiques de gestion des sols peuvent influer positivement sur le nombre et la diversité des oiseaux chanteurs dans les oliveraies en améliorant l'habitat et la disponibilité de nourriture. Cependant, on en sait peu sur leurs conséquences potentielles sur le succès de reproduction de ces espèces. Nous avons suivi la densité de nids et le succès de reproduction d'oiseaux nichant dans les arbres dans 17 oliveraies du sud de l'Espagne sous deux régimes opposés de gestion des sols (avec ou sans couvert herbacé) pendant trois ans. Nous avons analysé le succès de reproduction en examinant les transitions entre les différents stades du cycle de reproduction pour trois carduelinés communs : la Linotte mélodieuse (Linaria cannabina),","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70961568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Weather and climate change drive annual variation of reproduction by an aerial insectivore","authors":"M. T. Murphy, Lucas J. Redmond, Amy C. Dolan, Nathan W Cooper, K. Shepherdson, Christopher M. Chutter, S. Cancellieri","doi":"10.5751/ace-02203-170221","DOIUrl":"https://doi.org/10.5751/ace-02203-170221","url":null,"abstract":". For many bird species, but especially aerial insectivores, reproduction depends on weather. Climate change is likely to intensify effects, but with uncertain consequences. We report 22 years of data on Eastern Kingbird ( Tyrannus tyrannus ) reproduction for two populations located in different hygric environments undergoing climate change; mesic central New York, USA, (NY; 12 years) and xeric southeastern Oregon, USA, (OR: 10 years). Laying date became earlier with increasing temperature in the 30-day period preceding laying in identical fashion at both sites, and in years of early laying, clutch size was larger, length of laying season increased, and failed initial nesting attempts were more often replaced. High temperature in the 10-days preceding mean laying date was associated with shorter laying seasons, while a site by 10-day temperature interaction reflected an increase and decrease of clutch size with increasing 10-day temperature in NY and OR, respectively. Seasonal rate of clutch size decline was higher when the laying season was short but also slowed in xeric OR when rain was abundant in the 10-days prior to mean laying date. Nest predation drove annual variation in young fledged/nest, but the latter also increased and decreased with increasing maximum temperature during the nestling phase in mesic NY and xeric OR, respectively. Potential effects of climate change on kingbird populations are thus high given the dependence of reproduction on weather, and climate change likely contributed to declines of kingbirds in OR. Declines of kingbirds in NY appear unrelated to warming climates because higher temperatures advanced laying dates and yielded greater nest productivity. However, length of laying season declined across years at both sites, and thus early season gains may be negated by poor conditions late in the season that may be causing shorter laying seasons. Further work is needed to identify causes for the latter changes. a été associée à des saisons de ponte plus courtes, tandis que l’interaction entre le site et la température sur 10 jours s’est traduite par une augmentation et une diminution de la taille de la ponte avec l’augmentation de la température sur 10 jours dans NY et l’OR, respectivement. Le taux saisonnier de diminution de la taille de la ponte était plus élevé lorsque la saison de ponte était courte, mais il a également ralenti dans l’OR lorsque la pluie était abondante dans les 10 jours précédant la date de ponte moyenne. La prédation au nid était responsable de la variation annuelle du nombre de jeunes envolés par nid, mais ce nombre a également augmenté et diminué avec l’augmentation de la température maximale pendant l’élevage des oisillons dans NY et l’OR, respectivement. Les effets potentiels des changements climatiques sur les populations de tyrans sont donc élevés étant donné que la nidification dépend des conditions météorologiques, et les changements climatiques ont probablement contribué à la baisse des t","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional habitat suitability and urban encroachment explain temporal and spatial variations in abundance of a declining farmland bird, the Little Bustard Tetrax tetrax","authors":"B. Arroyo, A. Estrada, F. Casas, Laura Cardador, M. De Cáceres, G. Bota, D. Giralt, L. Brotóns, F. Mougeot","doi":"10.5751/ace-02243-170219","DOIUrl":"https://doi.org/10.5751/ace-02243-170219","url":null,"abstract":". Species response to land use can be examined under a functional perspective, where habitats are described according to species´ resource dependencies. Distribution or abundance models based on resource availability rather than land use types can be more informative about the ultimate processes behind observed population or distribution trends. Habitat use may depend on resources available, as well as disturbances that affect accessibility to such resources. Increasing human presence and urban encroachment may thus alter the relationships between habitat suitability and species abundance. Using 10 years of field data, we investigated whether variability in Little Bustard ( Tetrax tetrax ) abundance was explained by functional habitat suitability (assessed through resource-based models) and urban encroachment. We found that spatial and temporal variations in Little Bustard abundance were explained by functional habitat suitability and avoidance of urban areas, but that the significance of each variable varied with spatial scale. Little Bustard abundance at each observation point significantly increased with local nesting but not foraging habitat suitability, and decreased with increasing proportion of urban areas. At larger spatial scales, temporal changes in Little Bustard abundance were highly significantly related to changes in foraging habitat suitability. Moreover, the positive relationship between foraging habitat suitability and Little Bustard abundance weakened as the proportion of urban areas increased, and almost disappeared when the proportion of urban areas was more than 5%. Our results underline the benefits of using resource-based models to better understand processes that relate animal abundance and habitat suitability, while simultaneously considering avoided elements of the landscape. 10 ans de données prises sur le terrain, nous avons cherché à savoir si la variabilité de l’abondance de l’Outarde canepetière ( Tetrax tetrax ) s’expliquait par l’adéquation fonctionnelle de l’habitat (évaluée par des modèles basés sur les ressources) et l’empiètement urbain. Nous avons constaté que les variations spatiales et temporelles de l’abondance de l’Outarde canepetière s’expliquaient par l’adéquation fonctionnelle de l’habitat et l’évitement des zones urbaines, mais que l’importance de chaque variable variait selon l’échelle spatiale. L’abondance de l’outarde à chaque point d’observation a augmenté significativement avec l’adéquation de l’habitat local pour la nidification mais pas pour l’alimentation, et a diminué avec la proportion croissante de zones urbaines. À des échelles spatiales plus grandes, les changements temporels de l’abondance de l’outarde étaient fortement liés aux changements de l’adéquation de l’habitat pour l’alimentation. De plus, la relation positive entre l’adéquation de l’habitat pour l’alimentation et l’abondance de l’outarde a diminué à mesure que la proportion de zones urbaines augmentait, et l’espèce était presqu","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Survival of translocated Columbian Sharp-tailed Grouse: recognizing trends in post-release mortality to improve reintroductions","authors":"S. Mathews, P. Coates, Brian G. Prochazka, Shawn P. Espinosa, D. Delehanty","doi":"10.5751/ace-02253-170228","DOIUrl":"https://doi.org/10.5751/ace-02253-170228","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arthropod prey and diets of woodland migrants are similar between natural riparian woodlands and anthropogenic woodlots in the northern prairie region","authors":"Mingchun Liu, P. Kinnicutt, Reza Goljani Amirkhiz, David Swanson","doi":"10.5751/ace-2317-170245","DOIUrl":"https://doi.org/10.5751/ace-2317-170245","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70964348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of pre-breeding nutrient reserves in subarctic staging Lesser Snow Geese (Anser caerulescens caerulescens) and Ross’s Geese (Anser rossii): implications for reproduction","authors":"Frank B. Baldwin, R. Alisauskas, J. Leafloor","doi":"10.5751/ace-02326-170238","DOIUrl":"https://doi.org/10.5751/ace-02326-170238","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70962741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insights on post-breeding movements from a northeastern population of Canada Warblers (Cardellina canadensis)","authors":"Camille Bégin-Marchand, F. Gagnon, B. Drolet, J. Ibarzabal, J. Tremblay","doi":"10.5751/ace-02013-170104","DOIUrl":"https://doi.org/10.5751/ace-02013-170104","url":null,"abstract":"The study of migratory songbird transition periods, such as the post-breeding period, is complex because birds undertake different types of movements that vary in space and time. Nonetheless, it is important to understand the extent and duration of the territory and specific sites use to identify human activities likely to affect the species’ survival. Individuals from different regional populations may exhibit specific movements during the various phases of their annual cycle, and therefore conservation actions must be adapted. We studied a population of Canada Warblers (Cardellina canadensis) from the Saguenay region of Quebec, Canada, in the northeastern part of the species’ breeding range. We used a coordinated radio-telemetry network (Motus) to determine the residence time within the breeding territory, dates and times of departure, and early fall migration routes of 18 adult birds. We expected individuals to leave by mid-August and to migrate through the eastern flyway, along the Atlantic Coast. Six tracked individuals remained on their breeding territory until early September, corresponding to a residence time of approximately 90 days. These individuals left just after sunset on their day of departure. Twelve individuals departed earlier, and in the daytime, before the end of August; their earlier departure was likely for a purpose other than migration. Nine individuals were detected outside their breeding territory along the Atlantic migratory flyway: four migrated through the Great Lakes region, one in the Great Appalachian Valley, three along the Atlantic Coast or coastal plain, and one with an undetermined route. Our results suggest that adult Canada Warblers remain in the Saguenay region longer than expected, and that, although some individuals remain close to their breeding territory during the post-breeding period, others may use surrounding territories prior to initiating their fall migration. Our results will allow regional conservation managers to recommend that regional industry postpone the timing of certain activities that could negatively affect the species’ survival. Our study highlights the importance of fine-scale studies focused on specific periods of migratory songbird annual cycles to fill important knowledge gaps for understanding of the ecology of their species. Aperçu des déplacements post-nuptiaux de Parulines du Canada (Cardellina canadensis) issues d'une population du nord-est du pays RÉSUMÉ. L'étude des périodes de transition de passereaux migrateurs, comme la période post-nuptiale, est complexe car les oiseaux entreprennent différents types de déplacements qui varient dans l'espace et le temps. Néanmoins, il est important de comprendre l'étendue et la durée de l'utilisation du territoire et de sites spécifiques pour qu'on puisse déterminer quelles activités humaines sont susceptibles d'affecter la survie de l'espèce. Les individus de différentes populations régionales peuvent présenter des déplacements spécifiqu","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70960987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}