Pub Date : 2022-01-01DOI: 10.5751/ace-02046-170124
Amie E. Settlecowski, K. Davis, J. A. Cox, Stefan Woltmann, S. Taylor
. North American grassland birds colonized emerging habitat created by expanding agriculture in a pattern of eastward expansions from the mid-1800s to mid-1900s. These birds have been declining, since at least the mid-1900s, largely as result of anthropogenic landscape change. Only one bird that now breeds predominantly in southeastern pine savannas is thought to have experienced a concurrent range expansion into this region: Peucaea aestivalis (Bachman’s Sparrow). However, our understanding of the P. aestivalis expansion, and subsequent retraction to the southeastern United States, is largely based on a contemporaneous review of only a subset of historical records from beyond its modern, northern limit. We suggest an alternative explanation for these historical records is that P. aestivalis historically occurred more broadly than was recognized in contemporaneous literature. To evaluate these hypotheses, we reviewed field observations from literature, natural history collections, and eBird to show how P. aestivalis presence throughout eastern North America has shifted since the mid-1800s. To confirm that these findings were not the result of detection bias, we repeated our analysis on a common sparrow species ( Spizella pusilla ) with a largely overlapping breeding range, but no history of expansion and retraction. We confirm that P. aestivalis expanded its range, but add that prior to that expansion, its historical distribution was broader than commonly acknowledged today. As a result, we identify the northwestern historical limit of P. aestivalis , the Ouachita and Ozark highlands, as a potential source region for an eastward expansion that is consistent with those of other North American grassland birds of the era. We discuss the potential evolutionary and conservation implications of this range expansion on P. aestivalis given our more nuanced understanding of it. Anthropogenic landscape change initially provided additional habitat for P. aestivalis but has ultimately resulted in a reduction of the P. aestivalis distribution
{"title":"Natural history and community science records confirm rapid geographic shifts in the distribution of Bachman’s Sparrow (Peucaea aestivalis) since 1850","authors":"Amie E. Settlecowski, K. Davis, J. A. Cox, Stefan Woltmann, S. Taylor","doi":"10.5751/ace-02046-170124","DOIUrl":"https://doi.org/10.5751/ace-02046-170124","url":null,"abstract":". North American grassland birds colonized emerging habitat created by expanding agriculture in a pattern of eastward expansions from the mid-1800s to mid-1900s. These birds have been declining, since at least the mid-1900s, largely as result of anthropogenic landscape change. Only one bird that now breeds predominantly in southeastern pine savannas is thought to have experienced a concurrent range expansion into this region: Peucaea aestivalis (Bachman’s Sparrow). However, our understanding of the P. aestivalis expansion, and subsequent retraction to the southeastern United States, is largely based on a contemporaneous review of only a subset of historical records from beyond its modern, northern limit. We suggest an alternative explanation for these historical records is that P. aestivalis historically occurred more broadly than was recognized in contemporaneous literature. To evaluate these hypotheses, we reviewed field observations from literature, natural history collections, and eBird to show how P. aestivalis presence throughout eastern North America has shifted since the mid-1800s. To confirm that these findings were not the result of detection bias, we repeated our analysis on a common sparrow species ( Spizella pusilla ) with a largely overlapping breeding range, but no history of expansion and retraction. We confirm that P. aestivalis expanded its range, but add that prior to that expansion, its historical distribution was broader than commonly acknowledged today. As a result, we identify the northwestern historical limit of P. aestivalis , the Ouachita and Ozark highlands, as a potential source region for an eastward expansion that is consistent with those of other North American grassland birds of the era. We discuss the potential evolutionary and conservation implications of this range expansion on P. aestivalis given our more nuanced understanding of it. Anthropogenic landscape change initially provided additional habitat for P. aestivalis but has ultimately resulted in a reduction of the P. aestivalis distribution","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":"70961248","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}
Pub Date : 2022-01-01DOI: 10.5751/ace-02090-170201
Olivia M. Scott, N. Perlut, A. Strong
. Clutch size and number of young fledged has been shown to increase with female age until approximately mid-life, when reproductive performance declines. We used a long-term dataset (2002–019) to investigate age-specific effects on reproductive parameters of known-age female Savannah Sparrows ( Passerculus sandwichensis , n = 60), and Bobolinks, ( Dolichonyx oryzivorus , n = 75) breeding in managed hayfields and pastures in Shelburne and Hinesburg, Vermont, USA. Female Savannah Sparrows (age 1 to 6 years) showed evidence of reproductive senescence with the number of young fledged peaking at 2 years of age and declining in older age classes. Additionally, daily nest survival was strongly and negatively affected by female age. The effect of age on Bobolink reproductive performance was weak. We found an increase in the number of eggs laid from 1 to 2 years of age, no age effect on number of nest attempts or number of young fledged, and a weak, negative effect of age on daily nest survival. We found no support for an effect of grassland management treatment on daily nest survival, which may have been a result of unequal distribution of nesting attempts across treatment types. However, species-specific responses to hay harvest may have affected the relationship between age and reproductive performance. Savannah Sparrows renest rapidly and frequently after nest loss due to haying, which may constrain long-term investment in reproduction. In this highly managed system, older females may allocate less energy toward reproduction than younger females, potentially shifting those resources de survie quotidien du nid. Nous n’avons trouvé aucun indice confirmant l’existence d’un effet du type d’aménagement des prairies sur le taux de survie quotidien des nids, ce qui pourrait être le résultat d’une répartition inégale des tentatives de nidification selon les types d’aménagement. Cependant, les réactions spécifiques des espèces à la récolte du foin peuvent avoir affecté la relation entre l’âge et la performance de reproduction. Les Bruants des prés re-nichent rapidement et fréquemment après la perte de leur nid consécutive à la récolte du foin, ce qui peut limiter leur investissement à long terme dans la reproduction. Dans ce système de milieux grandement aménagés, les femelles plus âgées allouent sans doute moins d’énergie à la reproduction que les femelles plus jeunes, déplaçant peut-être ces ressources vers des comportements qui soutiennent la survie annuelle. En revanche, les Goglus des prés n’investissent peut-être pas autant dans la reproduction, ne re-nichent généralement qu’une seule fois après l’échec du nid et ont une saison de reproduction tronquée en raison de leur longue migration automnale vers l’Amérique du Sud. Par conséquent, leur succès de reproduction ne varie peut-être pas aussi fortement avec l’âge. fast end of the life axis, estimating age-specific
． 卵群大小和雏鸟数量随着雌性年龄的增长而增加，直到大约中年时，繁殖能力下降。利用2002 - 2009年的长期数据，研究了在美国佛蒙特州谢尔本和海因斯堡管理的干草和牧场上饲养的已知年龄雌性萨凡纳麻雀(雀鸟，n = 60)和波波林克斯麻雀(Dolichonyx oryzivorus, n = 75)的生殖参数的年龄特异性影响。雌性萨凡纳麻雀(1 ~ 6岁)表现出生殖衰老的迹象，雏鸟的数量在2岁时达到顶峰，在年龄较大的班级中下降。此外，雌鸟年龄对巢日存活率有强烈的负向影响。年龄对食米鸟繁殖性能的影响较弱。我们发现从1岁到2岁产卵的数量增加，年龄对巢尝试次数或雏鸟数量没有影响，年龄对巢的每日存活率有微弱的负面影响。我们没有发现支持草地管理处理对巢日存活率的影响，这可能是由于不同处理类型的筑巢尝试分布不均造成的。然而，对干草收获的物种特异性反应可能影响了年龄和繁殖性能之间的关系。萨凡纳麻雀在巢因干草损失后迅速而频繁地筑巢，这可能会限制对繁殖的长期投资。在这个高度管理的系统中，年长的雌性可能比年轻的雌性分配更少的精力用于繁殖，潜在地转移了那些日常生存的资源。Nous n 'avons trouvous aucun index证实，在大草原上存在不影响其他类型的电子烟和其他类型的电子烟和其他类型的电子烟和其他类型的电子烟之间存在不影响。在此之前，所有的材料和材料都与材料和材料的关系有关，所有的材料和材料都与复制性能有关。从长期的角度来看，在限制长期的投资和生育方面，在限制长期的投资和生育方面，在限制长期的投资和生育方面，都存在一些问题。数据交换系统的数据交换系统的数据交换系统的数据交换系统、数据交换系统的数据交换系统、数据交换系统的数据交换系统、数据交换系统的数据交换系统、数据交换系统的数据交换系统、数据交换系统的数据交换系统。在复仇的过程中，我们的目标是通过复制复制，我们的目标是通过复制复制，我们的目标是通过复制复制，我们的目标是通过复制复制，我们的目标是通过复制复制，我们的目标是通过复制复制，我们的目标是通过复制复制，我们的目标是通过复制复制。与此同时，较低的生殖成功率在不同的条件下(-être)高于平均水平(1 / 4)。快速结束生命轴，估计具体年龄
{"title":"Age-specific effects on reproductive performance of grassland songbirds nesting in agricultural habitats","authors":"Olivia M. Scott, N. Perlut, A. Strong","doi":"10.5751/ace-02090-170201","DOIUrl":"https://doi.org/10.5751/ace-02090-170201","url":null,"abstract":". Clutch size and number of young fledged has been shown to increase with female age until approximately mid-life, when reproductive performance declines. We used a long-term dataset (2002–019) to investigate age-specific effects on reproductive parameters of known-age female Savannah Sparrows ( Passerculus sandwichensis , n = 60), and Bobolinks, ( Dolichonyx oryzivorus , n = 75) breeding in managed hayfields and pastures in Shelburne and Hinesburg, Vermont, USA. Female Savannah Sparrows (age 1 to 6 years) showed evidence of reproductive senescence with the number of young fledged peaking at 2 years of age and declining in older age classes. Additionally, daily nest survival was strongly and negatively affected by female age. The effect of age on Bobolink reproductive performance was weak. We found an increase in the number of eggs laid from 1 to 2 years of age, no age effect on number of nest attempts or number of young fledged, and a weak, negative effect of age on daily nest survival. We found no support for an effect of grassland management treatment on daily nest survival, which may have been a result of unequal distribution of nesting attempts across treatment types. However, species-specific responses to hay harvest may have affected the relationship between age and reproductive performance. Savannah Sparrows renest rapidly and frequently after nest loss due to haying, which may constrain long-term investment in reproduction. In this highly managed system, older females may allocate less energy toward reproduction than younger females, potentially shifting those resources de survie quotidien du nid. Nous n’avons trouvé aucun indice confirmant l’existence d’un effet du type d’aménagement des prairies sur le taux de survie quotidien des nids, ce qui pourrait être le résultat d’une répartition inégale des tentatives de nidification selon les types d’aménagement. Cependant, les réactions spécifiques des espèces à la récolte du foin peuvent avoir affecté la relation entre l’âge et la performance de reproduction. Les Bruants des prés re-nichent rapidement et fréquemment après la perte de leur nid consécutive à la récolte du foin, ce qui peut limiter leur investissement à long terme dans la reproduction. Dans ce système de milieux grandement aménagés, les femelles plus âgées allouent sans doute moins d’énergie à la reproduction que les femelles plus jeunes, déplaçant peut-être ces ressources vers des comportements qui soutiennent la survie annuelle. En revanche, les Goglus des prés n’investissent peut-être pas autant dans la reproduction, ne re-nichent généralement qu’une seule fois après l’échec du nid et ont une saison de reproduction tronquée en raison de leur longue migration automnale vers l’Amérique du Sud. Par conséquent, leur succès de reproduction ne varie peut-être pas aussi fortement avec l’âge. fast end of the life axis, estimating age-specific","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":"70961271","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}
Pub Date : 2022-01-01DOI: 10.5751/ace-02096-170117
C. J. Martin, E. Bork, S. Nielsen
. Electrical transmission line development has been expanding globally by 5% per year, leading to increases in avian collisions with lines. Canadian estimates of transmission line collision mortalities range from 2.5 to 25.6 million birds per year, with the majority of mortalities attributed to collisions with overhead shield wires, and by susceptible birds that are young, large-bodied, with low maneuverability, or in open habitats. In this study, avian mortality was estimated for a ~4900 ha area in the mixed-grass prairie of southeastern Alberta following construction of two major transmission lines. We surveyed seven 500 m transects 7–10 times during both the breeding and migration seasons, where transects were categorized into road (n = 2), transmission line (n = 2), wetland (with transmission lines above; n = 1), or control (n = 2) areas. During the 2016 breeding season (5 May–24 June), we detected 23 mortalities under transmission lines, 7 mortalities beside roads, and no mortalities in controls. In the 2017 spring migration season (31 March–5 May), we detected 24 mortalities under transmission lines, 3 mortalities beside roads, and no mortalities in controls. Mortality rates were adjusted with biases estimated from detectability and scavenging trials. Scavenging rates were high (82% of carcasses were scavenged within 5 days) and detectability of deceased birds was positively related to body size. Overall, linear disturbances within the study area, including 37.7 km of highways and transmission lines, contributed to an estimated 75 deaths/km nous avons détecté 24 mortalités sous les lignes de transmission, 3 mortalités à côté de routes et aucune mortalité dans les zones témoin. Les taux de mortalité ont été ajustés au moyen de biais calculés à partir d'essais de détectabilité et de disparition des carcasses imputable aux charognards. Les taux de disparition étaient élevés (82 % des carcasses ont été éliminées dans les 5 jours) et la détectabilité des oiseaux morts était positivement liée à leur taille. Dans l'ensemble, les perturbations linéaires dans la zone d'étude, y compris 37,7 km d'autoroutes et de lignes de transmission, ont entraîné 75 mortalités/km de perturbation linéaire pendant une saison de migration et une saison de nidification (~50 mortalités/ km de lignes de transmission et ~25 mortalités/km de routes; ~1904 mortalités d'oiseaux au total). Nos résultats soulignent la nécessité de mettre en place des mesures d'atténuation pour qu'on puisse réduire la mortalité d'oiseaux, minimisant ainsi l'impact à long terme des perturbations linéaires, telles que les lignes de transmission et les routes, sur les communautés d'oiseaux.
{"title":"Mortality of grassland birds increases with transmission lines","authors":"C. J. Martin, E. Bork, S. Nielsen","doi":"10.5751/ace-02096-170117","DOIUrl":"https://doi.org/10.5751/ace-02096-170117","url":null,"abstract":". Electrical transmission line development has been expanding globally by 5% per year, leading to increases in avian collisions with lines. Canadian estimates of transmission line collision mortalities range from 2.5 to 25.6 million birds per year, with the majority of mortalities attributed to collisions with overhead shield wires, and by susceptible birds that are young, large-bodied, with low maneuverability, or in open habitats. In this study, avian mortality was estimated for a ~4900 ha area in the mixed-grass prairie of southeastern Alberta following construction of two major transmission lines. We surveyed seven 500 m transects 7–10 times during both the breeding and migration seasons, where transects were categorized into road (n = 2), transmission line (n = 2), wetland (with transmission lines above; n = 1), or control (n = 2) areas. During the 2016 breeding season (5 May–24 June), we detected 23 mortalities under transmission lines, 7 mortalities beside roads, and no mortalities in controls. In the 2017 spring migration season (31 March–5 May), we detected 24 mortalities under transmission lines, 3 mortalities beside roads, and no mortalities in controls. Mortality rates were adjusted with biases estimated from detectability and scavenging trials. Scavenging rates were high (82% of carcasses were scavenged within 5 days) and detectability of deceased birds was positively related to body size. Overall, linear disturbances within the study area, including 37.7 km of highways and transmission lines, contributed to an estimated 75 deaths/km nous avons détecté 24 mortalités sous les lignes de transmission, 3 mortalités à côté de routes et aucune mortalité dans les zones témoin. Les taux de mortalité ont été ajustés au moyen de biais calculés à partir d'essais de détectabilité et de disparition des carcasses imputable aux charognards. Les taux de disparition étaient élevés (82 % des carcasses ont été éliminées dans les 5 jours) et la détectabilité des oiseaux morts était positivement liée à leur taille. Dans l'ensemble, les perturbations linéaires dans la zone d'étude, y compris 37,7 km d'autoroutes et de lignes de transmission, ont entraîné 75 mortalités/km de perturbation linéaire pendant une saison de migration et une saison de nidification (~50 mortalités/ km de lignes de transmission et ~25 mortalités/km de routes; ~1904 mortalités d'oiseaux au total). Nos résultats soulignent la nécessité de mettre en place des mesures d'atténuation pour qu'on puisse réduire la mortalité d'oiseaux, minimisant ainsi l'impact à long terme des perturbations linéaires, telles que les lignes de transmission et les routes, sur les communautés d'oiseaux.","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":"70961346","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}
Pub Date : 2022-01-01DOI: 10.5751/ace-02153-170131
J. Morkūnas, S. Oppel, Modestas Bružas, Y. Rouxel, R. Morkūnė, Danielle L. Mitchell
, ABSTRACT. Bycatch, or the incidental capture of non-target species in fisheries, has been identified as one of the major threats affecting seabird populations worldwide. In the Baltic Sea, a globally important area for wintering seabirds, bycatch in gillnets represents an important cause of human-induced mortality for seabird species whose populations have declined significantly in recent decades. Although countries are required by European law to report official bycatch data, a lack of data on bycatch in small-scale fisheries impedes an assessment of the contribution of bycatch to declines of seabird populations. This study presents data on the total seabird bycatch in the small-scale coastal fishery for an entire country, Lithuania, in the southeastern Baltic Sea, during the 2015–2020 winter period. An average of 19.3% of the total fishing effort in net-meter days (15.5% of fishing days) were observed each winter season, resulting in observations of 909 bycaught birds from 15 species. Two species composed two-thirds of the total bycatch, Long-tailed Duck ( Clangula hyemalis ; 42.1%) and Velvet Scoter ( Melanitta fusca ; 35.4%). Bycatch composition varied with depth, with the majority of bycatch occurring in nets set at depths ≤ 10 m. Adult males dominated the bycatch of benthivorous sea ducks, whereas adult females composed the majority of piscivorous birds caught. Low numbers of juveniles in the bycatch may indicate different wintering sites for young birds. We estimate that between 1500 and 3000 seabirds were bycaught annually in the Lithuanian small-scale coastal fishery in the 2015–2020 period. Because this number is orders of magnitude larger than the bycatch officially reported by the Lithuanian authorities (six birds), our study highlights deficiencies in the country’s current bycatch reporting. In contrast to official statistics based on inadequate data, the unintended capture of seabirds in gillnets remains high, despite financial investments to minimize the impact of fisheries on biodiversity.
{"title":"Seabird bycatch in a Baltic coastal gillnet fishery is orders of magnitude larger than official reports","authors":"J. Morkūnas, S. Oppel, Modestas Bružas, Y. Rouxel, R. Morkūnė, Danielle L. Mitchell","doi":"10.5751/ace-02153-170131","DOIUrl":"https://doi.org/10.5751/ace-02153-170131","url":null,"abstract":", ABSTRACT. Bycatch, or the incidental capture of non-target species in fisheries, has been identified as one of the major threats affecting seabird populations worldwide. In the Baltic Sea, a globally important area for wintering seabirds, bycatch in gillnets represents an important cause of human-induced mortality for seabird species whose populations have declined significantly in recent decades. Although countries are required by European law to report official bycatch data, a lack of data on bycatch in small-scale fisheries impedes an assessment of the contribution of bycatch to declines of seabird populations. This study presents data on the total seabird bycatch in the small-scale coastal fishery for an entire country, Lithuania, in the southeastern Baltic Sea, during the 2015–2020 winter period. An average of 19.3% of the total fishing effort in net-meter days (15.5% of fishing days) were observed each winter season, resulting in observations of 909 bycaught birds from 15 species. Two species composed two-thirds of the total bycatch, Long-tailed Duck ( Clangula hyemalis ; 42.1%) and Velvet Scoter ( Melanitta fusca ; 35.4%). Bycatch composition varied with depth, with the majority of bycatch occurring in nets set at depths ≤ 10 m. Adult males dominated the bycatch of benthivorous sea ducks, whereas adult females composed the majority of piscivorous birds caught. Low numbers of juveniles in the bycatch may indicate different wintering sites for young birds. We estimate that between 1500 and 3000 seabirds were bycaught annually in the Lithuanian small-scale coastal fishery in the 2015–2020 period. Because this number is orders of magnitude larger than the bycatch officially reported by the Lithuanian authorities (six birds), our study highlights deficiencies in the country’s current bycatch reporting. In contrast to official statistics based on inadequate data, the unintended capture of seabirds in gillnets remains high, despite financial investments to minimize the impact of fisheries on biodiversity.","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":"70961766","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}
Pub Date : 2022-01-01DOI: 10.5751/ace-02204-170220
Jay A. Vonbank, Joshua P. Vasquez, Jason P. Loghry, Kevin J. Kraai, Lei Cao, B. Ballard
. Greater White-fronted Geese ( Anser albifrons frontalis ) use both agricultural and wetland habitats throughout winter with changes in use exhibited temporally and in relation to environmental and landscape factors. Currently, an unknown proportion of Greater White-fronted Geese winter in Mexico, largely along the Gulf Coast and in the Central Highlands, where information regarding wintering ecology is largely unknown. Because conservation efforts for waterfowl typically focus on wetland habitats, understanding factors influencing wetland use is imperative to developing informed conservation strategies. During winters, 2016– 2018, we used remote sensing to measure characteristics of 91 wetlands used by GPS-tagged Greater White-fronted Geese, and modeled how wetland and landscape variables influenced wetland use and selection. Our top model of wetland use indicated that larger wetlands and wetlands that were closer to other used wetlands were related to increased use. There was an interaction between wetland type and distance to agriculture, indicating that Greater White-fronted Geese exhibited increased use of emergent herbaceous/grass and woody wetland types that were in closer proximity to agriculture. Our wetland-selection model indicated that woody and emergent wetlands that were larger in size were selected at greater rates than available wetlands on the landscape. Additionally, we conducted a spatial comparison of used wetlands in this study with wetlands previously identified as important for waterfowl conservation in Mexico in the literature. Of 91 wetlands used by geese, only 7.7% fell within wetland complexes identified as priority for waterfowl conservation or specific wetlands important to Greater White-fronted Geese by previous research, and all were within the Laguna Madre de Mexico and Rio Grande Delta regions in Tamaulipas. Wetlands in Mexico are being degraded at a rapid rate, and information such as this is important for future management and conservation-planning efforts throughout Mexico for wetland-dependent species such as the Greater White-fronted Goose. la conservation dans tout le Mexique pour les espèces qui dépendent de milieux humides comme l’Oie rieuse.
{"title":"Wetland use by Greater White-fronted Geese and spatial overlap with waterfowl conservation priority areas in Mexico","authors":"Jay A. Vonbank, Joshua P. Vasquez, Jason P. Loghry, Kevin J. Kraai, Lei Cao, B. Ballard","doi":"10.5751/ace-02204-170220","DOIUrl":"https://doi.org/10.5751/ace-02204-170220","url":null,"abstract":". Greater White-fronted Geese ( Anser albifrons frontalis ) use both agricultural and wetland habitats throughout winter with changes in use exhibited temporally and in relation to environmental and landscape factors. Currently, an unknown proportion of Greater White-fronted Geese winter in Mexico, largely along the Gulf Coast and in the Central Highlands, where information regarding wintering ecology is largely unknown. Because conservation efforts for waterfowl typically focus on wetland habitats, understanding factors influencing wetland use is imperative to developing informed conservation strategies. During winters, 2016– 2018, we used remote sensing to measure characteristics of 91 wetlands used by GPS-tagged Greater White-fronted Geese, and modeled how wetland and landscape variables influenced wetland use and selection. Our top model of wetland use indicated that larger wetlands and wetlands that were closer to other used wetlands were related to increased use. There was an interaction between wetland type and distance to agriculture, indicating that Greater White-fronted Geese exhibited increased use of emergent herbaceous/grass and woody wetland types that were in closer proximity to agriculture. Our wetland-selection model indicated that woody and emergent wetlands that were larger in size were selected at greater rates than available wetlands on the landscape. Additionally, we conducted a spatial comparison of used wetlands in this study with wetlands previously identified as important for waterfowl conservation in Mexico in the literature. Of 91 wetlands used by geese, only 7.7% fell within wetland complexes identified as priority for waterfowl conservation or specific wetlands important to Greater White-fronted Geese by previous research, and all were within the Laguna Madre de Mexico and Rio Grande Delta regions in Tamaulipas. Wetlands in Mexico are being degraded at a rapid rate, and information such as this is important for future management and conservation-planning efforts throughout Mexico for wetland-dependent species such as the Greater White-fronted Goose. la conservation dans tout le Mexique pour les espèces qui dépendent de milieux humides comme l’Oie rieuse.","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":"70962217","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}
Pub Date : 2022-01-01DOI: 10.5751/ace-02215-170208
Viktoria Grudinskaya, S. Samsonov, Elena Galkina, A. Grabovsky, T. Makarova, T. Vaytina, S. Fedotova, D. Shitikov
. Weather conditions have a significant impact on the life-history strategies of birds. The mechanisms by which weather variability drives demographic processes in boreal passerines have been investigated insufficiently. We examined the effects of spring weather on first egg-laying dates, clutch size, and nest survival of Booted Warbler ( Iduna caligata ) and Whinchat ( Saxicola rubetra ) breeding in abandoned agricultural fields in the north of European Russia in 2005–2019. We used general linear models to express first egg-laying dates and clutch size and program MARK to model nest survival as a function of weather variables. Our results demonstrated that variability of May precipitation and averaged daily temperature are important drivers of first egg dates, clutch size, and nest survival in both species. The first egg dates of Booted Warblers and Whinchats were determined primarily by the May temperature: the warmer the weather in May, the earlier the laying dates. Taking into account the effect of the first egg date, the clutch size of Booted Warblers strongly depended on the May averaged daily temperatures, whereas the clutch size of Whinchats was weakly affected by May precipitation. The spring weather had a strong impact on Booted Warbler and Whinchat nest survival, potentially by influencing the activity of nest predators. We suggest that years with a coincidence of low spring precipitation and temperature are the "bad" years for reproduction of boreal grassland birds. RÉSUMÉ. Les conditions météorologiques ont un impact majeur sur les stratégies de reproduction des oiseaux. Les mécanismes par lesquels la variabilité météorologique détermine les processus démographiques des passereaux des régions boréales ont été insuffisamment examinés. Nous avons examiné les effets du climat printanier sur les dates de première ponte, la taille des couvées et la survie des nids d’hypolaïs bottées ( Iduna caligata ) et de tariers des prés ( Saxicola rubetra ) qui se reproduisaient dans des champs agricoles abandonnés au nord de la Russie européenne de 2005 à 2009. Nous avons utilisé des modèles linéaires généraux pour exprimer les dates de première ponte et la taille des couvées et le programme MARK pour modéliser la survie des nids comme une fonction des variables météorologiques. Nos résultats indiquent que la variabilité des précipitations en mai et les températures moyennes quotidiennes sont des éléments déterminants pour les dates de première ponte, la taille des couvées et la survie des nids dans les deux espèces. Les dates de première ponte des hypolaïs bottées et des tariers des prés étaient principalement déterminées par la température en mai : plus le temps était chaud, plus la ponte était précoce. En tenant compte de l’effet de la date de première ponte, la taille des couvées d’hypolaïs bottées dépendait fortement des températures quotidiennes moyennes en mai, alors que la taille des couvées de tariers des prés n’était que peu affectée par le
． 天气条件对鸟类的生活史策略有重大影响。气候变化驱动北方雀鸟种群过程的机制尚未得到充分研究。2005-2019年，我们研究了春季天气对俄罗斯北部废弃农田中长头莺(Iduna caligata)和白头莺(Saxicola rubetra)首次产卵日期、窝卵大小和巢存活率的影响。我们使用一般线性模型来表示首次产卵日期和窝卵数量，并使用MARK程序来模拟巢生存作为天气变量的函数。我们的研究结果表明，5月降水和平均日温度的变化是这两个物种的首卵日期、窝卵大小和巢存活率的重要驱动因素。林莺和莺的第一次产卵日期主要是由五月的温度决定的:五月的天气越暖和，产卵日期越早。考虑到首卵日期的影响，林莺的卵数受5月日平均气温的影响较大，而莺的卵数受5月降水的影响较小。春天的天气对莺和莺的巢穴生存有很大的影响，可能是通过影响巢穴捕食者的活动来实现的。结果表明，春季低降水和低气温同时出现的年份是北方草原鸟类繁殖的“不利”年份。的简历。在某些情况下，不能对其他情况造成重大影响，不能对其他情况造成重大影响。这一过程是指，在整个过程中，所有的过程都是指，所有的过程都是指，所有的过程都是指，所有的过程都是指，所有的过程都是指，所有的过程都是指，所有的过程都是指。Nous avons研究了2005年至2009年俄罗斯北部和欧洲地区的气候变化对气候的影响，包括土壤土壤、土壤土壤、土壤土壤、土壤土壤和土壤土壤、土壤土壤、土壤土壤和土壤土壤的影响，以及土壤土壤和土壤土壤的影响。“我们的目标是利用modmodles和其他可变因素，例如，使用modmodles和其他可变因素，例如，使用modmodsles和其他可变因素，例如，使用modmodsles和其他可变因素，例如，使用modmodsles和其他可变因素。没有任何一个单独的可变因素，没有任何一个可变因素，没有任何一个可变因素，没有任何一个可变因素，没有任何一个可变因素，没有任何一个可变因素，没有任何一个可变因素，没有任何一个可变因素，没有任何一个可变因素，没有任何一个可变因素，没有任何一个可变因素。三个日期都是关于底部和底部的交换条件，例如:底部和底部的交换条件，例如:底部和底部的交换条件，以及底部和底部的交换条件。En房客考虑de l 'effet de la de首映日期桥,身材des couvees d 'hypolais bottees dependait fortement des温度quotidiennes平均值麦,那么,身材des couvees de tariers·n这一些affectee par les降雨雪德梅。气候变化对人类生存的影响，对人类生存的影响，对人类生存的影响，对人类生存的影响，对人类生存的影响，对人类生存的影响，对人类生存的影响，对人类生存的影响。现在的建议是，所有的薪金薪金都是由薪金薪金、薪金薪金、薪金薪金、薪金薪金、薪金薪金、薪金薪金、薪金薪金、薪金薪金、薪金薪金、薪金薪金、薪金薪金、薪金薪金和薪金薪金组成。
{"title":"Effects of spring weather on laying dates, clutch size, and nest survival of ground-nesting passerines in abandoned fields","authors":"Viktoria Grudinskaya, S. Samsonov, Elena Galkina, A. Grabovsky, T. Makarova, T. Vaytina, S. Fedotova, D. Shitikov","doi":"10.5751/ace-02215-170208","DOIUrl":"https://doi.org/10.5751/ace-02215-170208","url":null,"abstract":". Weather conditions have a significant impact on the life-history strategies of birds. The mechanisms by which weather variability drives demographic processes in boreal passerines have been investigated insufficiently. We examined the effects of spring weather on first egg-laying dates, clutch size, and nest survival of Booted Warbler ( Iduna caligata ) and Whinchat ( Saxicola rubetra ) breeding in abandoned agricultural fields in the north of European Russia in 2005–2019. We used general linear models to express first egg-laying dates and clutch size and program MARK to model nest survival as a function of weather variables. Our results demonstrated that variability of May precipitation and averaged daily temperature are important drivers of first egg dates, clutch size, and nest survival in both species. The first egg dates of Booted Warblers and Whinchats were determined primarily by the May temperature: the warmer the weather in May, the earlier the laying dates. Taking into account the effect of the first egg date, the clutch size of Booted Warblers strongly depended on the May averaged daily temperatures, whereas the clutch size of Whinchats was weakly affected by May precipitation. The spring weather had a strong impact on Booted Warbler and Whinchat nest survival, potentially by influencing the activity of nest predators. We suggest that years with a coincidence of low spring precipitation and temperature are the \"bad\" years for reproduction of boreal grassland birds. RÉSUMÉ. Les conditions météorologiques ont un impact majeur sur les stratégies de reproduction des oiseaux. Les mécanismes par lesquels la variabilité météorologique détermine les processus démographiques des passereaux des régions boréales ont été insuffisamment examinés. Nous avons examiné les effets du climat printanier sur les dates de première ponte, la taille des couvées et la survie des nids d’hypolaïs bottées ( Iduna caligata ) et de tariers des prés ( Saxicola rubetra ) qui se reproduisaient dans des champs agricoles abandonnés au nord de la Russie européenne de 2005 à 2009. Nous avons utilisé des modèles linéaires généraux pour exprimer les dates de première ponte et la taille des couvées et le programme MARK pour modéliser la survie des nids comme une fonction des variables météorologiques. Nos résultats indiquent que la variabilité des précipitations en mai et les températures moyennes quotidiennes sont des éléments déterminants pour les dates de première ponte, la taille des couvées et la survie des nids dans les deux espèces. Les dates de première ponte des hypolaïs bottées et des tariers des prés étaient principalement déterminées par la température en mai : plus le temps était chaud, plus la ponte était précoce. En tenant compte de l’effet de la date de première ponte, la taille des couvées d’hypolaïs bottées dépendait fortement des températures quotidiennes moyennes en mai, alors que la taille des couvées de tariers des prés n’était que peu affectée par le","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":"70962492","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}
Pub Date : 2022-01-01DOI: 10.5751/ace-02245-170214
Lindsay M. Dreiss, Paul Sánchez-Navarro, Bryan Bird
,
，
{"title":"Spatiotemporal patterns in Golden-cheeked Warbler breeding habitat quantity and suitability","authors":"Lindsay M. Dreiss, Paul Sánchez-Navarro, Bryan Bird","doi":"10.5751/ace-02245-170214","DOIUrl":"https://doi.org/10.5751/ace-02245-170214","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":"70962899","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}
Pub Date : 2022-01-01DOI: 10.5751/ace-02262-170226
Jocelyn M. Gregoire, R. Hedley, E. Bayne
. Seismic lines have an extensive footprint in Canada's western boreal forest that alter habitat conditions for many species. Seismic lines exist within a range of seral states due to changing practices and regulations related to operational needs. Forest regeneration is often hindered on seismic lines as they are frequently repurposed for recreational or alternative industrial uses. The Canada Warbler ( Cardellina canadensis ) is a Neotropical migrant songbird that relies on Canada's boreal region for breeding habitat. As a species at risk both federally (Threatened) and provincially within Alberta (Sensitive), their response to seismic lines has been a significant gap in our understanding of human impacts on the boreal breeding grounds. We used playback surveys along seismic lines within Canada Warbler habitat to identify individual territories. Arrays of autonomous recording units (ARU) were deployed to conduct acoustic source localization (ASL) and map the locations of territorial singing events. Canada Warblers avoided seismic lines with little to no woody vegetation but were more likely to be observed near seismic lines when shrub cover on the line increased. Canada Warblers used the seismic line and the edge environment but did not select for the line when compared to its availability. Use was more evenly distributed across the seismic line as shrub density on the line increased. However, even the most overgrown seismic lines were still perceived as a feature and influenced Canada Warbler space use and behavior. For Canada Warblers, ensuring that seismic lines in old-growth deciduous forests are allowed to recover by reducing reuse of lines should mitigate population level impacts, but more work is needed to assess how population dynamics are influenced by seismic lines and other Les lignes sismiques occupent une place très importante dans la forêt boréale de l’ouest du Canada, ce qui modifie les conditions d’habitat de nombreuses espèces. Les lignes sismiques sont présentes à différents états biotiques en raison des changements des pratiques et des réglementations liées aux besoins opérationnels. La régénération de la forêt est souvent entravée sur les lignes sismiques, car ces zones sont fréquemment réaffectées à des usages de loisirs ou industriels alternatifs. La paruline du Canada ( Cardellina canadensis ) est un passereau migrateur néo-tropical qui vient se reproduire dans la région boréale du Canada. en à la fois au niveau fédéral (menacée) et provincial dans l’Alberta (sensible), réponse aux lignes sismiques a à notre compréhension de l’impact sur les territoires de reproduction des régions boréales. relevés d’enregistrement de cris le long des lignes sismiques dans l’habitat de la paruline du Canada afin d’identifier les territoires individuels. Des séries d'unités autonomes (ARU) ont été déployées pour procéder à la localisation acoustique de la source (ASL) et cartographier les emplacements d’où provenaient les cris sur le terri
． 地震线在加拿大西部北方森林中有广泛的足迹，改变了许多物种的栖息地条件。由于与操作需求相关的实践和法规的变化，地震线存在于几个州的范围内。地震线上的森林更新经常受到阻碍，因为它们经常被重新用于娱乐或替代工业用途。加拿大林莺(Cardellina canadensis)是一种新热带迁徙鸣禽，依赖于加拿大北方地区的繁殖栖息地。作为联邦(受威胁)和艾伯塔省(敏感)内的濒危物种，它们对地震线的反应一直是我们对人类对北方繁殖地影响的理解中的一个重大空白。我们沿着加拿大林莺栖息地的地震线进行回放调查，以确定单个领土。部署自主记录单元阵列(ARU)进行声源定位(ASL)并绘制区域歌唱事件的位置。加拿大林莺避开了几乎没有木本植被的地震线，但当地震线上灌木覆盖增加时，它们更有可能在地震线附近被观察到。加拿大林莺使用了地震线和边缘环境，但与可用性相比，没有选择这条线。随着线上灌木密度的增加，利用在地震线上的分布更加均匀。然而，即使是最杂草丛生的地震线仍然被认为是一种特征，并影响了加拿大林莺的空间使用和行为。对于加拿大林莺来说，通过减少线的重复使用，确保原始落叶林中的地震线得以恢复，应该可以减轻种群水平的影响，但需要做更多的工作来评估地震线和其他占据一个地方的林莺种群动态如何受到影响。leslies sismiques是指不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments，不同的samsaments电子烟和其他电子烟和其他电子烟都影响到电子烟和其他电子烟的使用。加拿大卡德琳(cardelina canadensis)是一种过渡性的洄游动物，它是一种热带的雌性动物，它是一种繁殖的雌性动物，它是一种加拿大的雌性动物。在 / / ························《加拿大特别行政区生境危机登记条例》和《领土个人登记条例》的有关规定。“单位、自主、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立、独立”。Les parulines du Canada(加拿大)，加拿大，加拿大，加拿大，加拿大，加拿大，加拿大，加拿大，加拿大，加拿大，加拿大，加拿大，加拿大，加拿大加拿大的法律规定是:加拿大的法律规定是:加拿大的法律规定是:环境限制;加拿大的法律规定是:加拿大的法律规定是:加拿大的法律规定是:加拿大的法律规定是:加拿大的法律规定是:加拿大的法律规定是:加拿大的法律规定是:Leur pracementssamet + samement pracementssamet sur l 'ensemble de la ligne sismique mesure que la densitesdeisisaugement。1 .在加拿大，même“空间利用率”、“空间利用率”、“加拿大规则的配置”、“空间利用率”、“限制性因素”、“限制性因素”、“限制性因素”和“限制性因素”。根据加拿大的规定，如果不采取任何措施，就可以确保不采取任何措施，例如不采取任何措施，不采取任何措施，例如不采取任何措施，不采取任何措施，不采取任何措施，例如不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施，不采取任何措施。在此基础上，对所有补充性的数据进行了分析，对所有补充性的数据进行了分析，对所有补充性的数据进行了分析，对所有补充性的数据进行了分析，对所有补充性的数据进行了分析。
{"title":"Canada Warbler response to vegetation structure on regenerating seismic lines","authors":"Jocelyn M. Gregoire, R. Hedley, E. Bayne","doi":"10.5751/ace-02262-170226","DOIUrl":"https://doi.org/10.5751/ace-02262-170226","url":null,"abstract":". Seismic lines have an extensive footprint in Canada's western boreal forest that alter habitat conditions for many species. Seismic lines exist within a range of seral states due to changing practices and regulations related to operational needs. Forest regeneration is often hindered on seismic lines as they are frequently repurposed for recreational or alternative industrial uses. The Canada Warbler ( Cardellina canadensis ) is a Neotropical migrant songbird that relies on Canada's boreal region for breeding habitat. As a species at risk both federally (Threatened) and provincially within Alberta (Sensitive), their response to seismic lines has been a significant gap in our understanding of human impacts on the boreal breeding grounds. We used playback surveys along seismic lines within Canada Warbler habitat to identify individual territories. Arrays of autonomous recording units (ARU) were deployed to conduct acoustic source localization (ASL) and map the locations of territorial singing events. Canada Warblers avoided seismic lines with little to no woody vegetation but were more likely to be observed near seismic lines when shrub cover on the line increased. Canada Warblers used the seismic line and the edge environment but did not select for the line when compared to its availability. Use was more evenly distributed across the seismic line as shrub density on the line increased. However, even the most overgrown seismic lines were still perceived as a feature and influenced Canada Warbler space use and behavior. For Canada Warblers, ensuring that seismic lines in old-growth deciduous forests are allowed to recover by reducing reuse of lines should mitigate population level impacts, but more work is needed to assess how population dynamics are influenced by seismic lines and other Les lignes sismiques occupent une place très importante dans la forêt boréale de l’ouest du Canada, ce qui modifie les conditions d’habitat de nombreuses espèces. Les lignes sismiques sont présentes à différents états biotiques en raison des changements des pratiques et des réglementations liées aux besoins opérationnels. La régénération de la forêt est souvent entravée sur les lignes sismiques, car ces zones sont fréquemment réaffectées à des usages de loisirs ou industriels alternatifs. La paruline du Canada ( Cardellina canadensis ) est un passereau migrateur néo-tropical qui vient se reproduire dans la région boréale du Canada. en à la fois au niveau fédéral (menacée) et provincial dans l’Alberta (sensible), réponse aux lignes sismiques a à notre compréhension de l’impact sur les territoires de reproduction des régions boréales. relevés d’enregistrement de cris le long des lignes sismiques dans l’habitat de la paruline du Canada afin d’identifier les territoires individuels. Des séries d'unités autonomes (ARU) ont été déployées pour procéder à la localisation acoustique de la source (ASL) et cartographier les emplacements d’où provenaient les cris sur le terri","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":"70962964","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}
Pub Date : 2022-01-01DOI: 10.5751/ace-02314-170237
Reinhard E. Matadamas, P. Enríquez, L. Guevara, Adolfo G. Navarro‐Sigüenza
. Although anthropogenic climate change (ACC) is a global phenomenon affecting all ecosystems, its effects are especially relevant in certain ecosystems, such as tropical montane forests. Responses of montane species to ACC in Mesoamerica remain unclear, limiting our ability to assess their vulnerability and the impacts on these ecosystems overall. To understand mechanisms underlying the distribution and vulnerability of montane faunas, we analyzed the influence of ACC on the geographic distribution of owls (order Strigiformes), which are a group of top avian predators distributed in montane forests. Using ecological niche models, we estimated the potential distributions of 35 species at present and under projected future climates (2050 and 2070) and analyzed changes in distributional patterns in terms of range size and altitudinal distribution for each species, as well as spatio-temporal patterns of species richness. Most of our projections (~86%) were consistent with the widely accepted hypothesis of species range shift to higher altitudes combined with reduction in distribution, as species try to track their climatic preferences. Interestingly, the mid-elevation species emerge as the most strongly affected by ACC, showing the highest rates of change. All climate scenarios produced a similar pattern of change in owl species richness, but they differed in the total number of species, a loss of 11 species and a maximum gain of seven species. Species richness remained relatively constant at mid elevations, whereas the greatest losses were in the highlands and the contiguous lowlands. Overall, our results suggest a severe impact of ACC in the coming decades for most owls of Mesoamerican montane forests.
{"title":"Stairway to extinction? Influence of anthropogenic climate change on distribution patterns of montane Strigiformes in Mesoamerica","authors":"Reinhard E. Matadamas, P. Enríquez, L. Guevara, Adolfo G. Navarro‐Sigüenza","doi":"10.5751/ace-02314-170237","DOIUrl":"https://doi.org/10.5751/ace-02314-170237","url":null,"abstract":". Although anthropogenic climate change (ACC) is a global phenomenon affecting all ecosystems, its effects are especially relevant in certain ecosystems, such as tropical montane forests. Responses of montane species to ACC in Mesoamerica remain unclear, limiting our ability to assess their vulnerability and the impacts on these ecosystems overall. To understand mechanisms underlying the distribution and vulnerability of montane faunas, we analyzed the influence of ACC on the geographic distribution of owls (order Strigiformes), which are a group of top avian predators distributed in montane forests. Using ecological niche models, we estimated the potential distributions of 35 species at present and under projected future climates (2050 and 2070) and analyzed changes in distributional patterns in terms of range size and altitudinal distribution for each species, as well as spatio-temporal patterns of species richness. Most of our projections (~86%) were consistent with the widely accepted hypothesis of species range shift to higher altitudes combined with reduction in distribution, as species try to track their climatic preferences. Interestingly, the mid-elevation species emerge as the most strongly affected by ACC, showing the highest rates of change. All climate scenarios produced a similar pattern of change in owl species richness, but they differed in the total number of species, a loss of 11 species and a maximum gain of seven species. Species richness remained relatively constant at mid elevations, whereas the greatest losses were in the highlands and the contiguous lowlands. Overall, our results suggest a severe impact of ACC in the coming decades for most owls of Mesoamerican montane forests.","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":"70963018","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}
Kyle D. Kittelberger, Megan Miller, Ç. Şekercioğlu
{"title":"Fall bird migration in western North America during a period of heightened wildfire activity","authors":"Kyle D. Kittelberger, Megan Miller, Ç. Şekercioğlu","doi":"10.5751/ace-2339-170243","DOIUrl":"https://doi.org/10.5751/ace-2339-170243","url":null,"abstract":"","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"53 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70964470","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}
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