scholarly journals Climatic patterns in the establishment of wintering areas by North American migratory birds

2016 ◽  
Vol 6 (7) ◽  
pp. 2022-2033 ◽  
Author(s):  
Heidi Pérez‐Moreno ◽  
Enrique Martínez‐Meyer ◽  
Jorge Soberón Mainero ◽  
Octavio Rojas‐Soto
Keyword(s):  
North American ◽  
Migratory Birds ◽  
Wintering Areas

scholarly journals Future climate change will impact the size and location of breeding and wintering areas of migratory thrushes in South America

The Condor ◽  
2021 ◽  
Author(s):  
Natália Stefanini Da Silveira ◽  
Maurício Humberto Vancine ◽  
Alex E Jahn ◽  
Marco Aurélio Pizo ◽  
Thadeu Sobral-Souza
Keyword(s):  
Climate Change ◽  
South America ◽  
Migratory Birds ◽  
Global Climate ◽  
Future Climate ◽  
Future Climate Change ◽  
Ecological Niche Models ◽  
Global Climate Changes ◽  
The Andes ◽  
Wintering Areas

Abstract Bird migration patterns are changing worldwide due to current global climate changes. Addressing the effects of such changes on the migration of birds in South America is particularly challenging because the details about how birds migrate within the Neotropics are generally not well understood. Here, we aim to infer the potential effects of future climate change on breeding and wintering areas of birds that migrate within South America by estimating the size and elevations of their future breeding and wintering areas. We used occurrence data from species distribution databases (VertNet and GBIF), published studies, and eBird for 3 thrush species (Turdidae; Turdus nigriceps, T. subalaris, and T. flavipes) that breed and winter in different regions of South America and built ecological niche models using ensemble forecasting approaches to infer current and future potential distributions throughout the breeding and wintering periods of each species. Our findings point to future shifts in wintering and breeding areas, mainly through elevational and longitudinal changes. Future breeding areas for T. nigriceps, which migrates along the Andes Mountains, will be displaced to the west, while breeding displacements to the east are expected for the other 2 species. An overall loss in the size of future wintering areas was also supported for 2 of the species, especially for T. subalaris, but an increase is anticipated for T. flavipes. Our results suggest that future climate change in South America will require that species shift their breeding and wintering areas to higher elevations in addition to changes in their latitudes and longitude. Our findings are the first to show how future climate change may affect migratory birds in South America throughout the year and suggest that even closely related migratory birds in South America will be affected in different ways, depending on the regions where they breed and overwinter.

scholarly journals Summer pre-breeding movements of Eleonora’s Falcon Falco eleonorae revealed by satellite telemetry: implications for conservation

2013 ◽  
Vol 23 (4) ◽  
pp. 487-494 ◽  
Author(s):  
UGO MELLONE ◽  
PASCUAL LÓPEZ-LÓPEZ ◽  
RUBÉN LIMIÑANA ◽  
VICENTE URIOS
Keyword(s):  
Migratory Birds ◽  
Satellite Telemetry ◽  
Population Level ◽  
Western Mediterranean ◽  
Breeding Period ◽  
Long Distance ◽  
Priority Species ◽  
Wintering Areas ◽  
Eleonora’S Falcon ◽  
Falco Eleonorae

SummaryRecent advances in bird tracking technologies are revealing that migratory birds use temporal staging sites other than breeding and wintering areas, and these areas deserve conservation efforts. Eleonora’s Falcon Falco eleonorae is a long-distance migratory raptor that breeds colonially on islands and is considered a priority species for conservation. Anecdotal observations indicate that during the pre-breeding period, Eleonora’s Falcons stay in inland areas far away from the colonies, but, to date there are no detailed data concerning the connectivity between these areas and breeding colonies. Using satellite telemetry, we analysed data from four summering events belonging to three individuals breeding in two colonies in the Western Mediterranean (Spain). All of them made inland movements in areas up to c.400 km distant from the respective breeding colonies, visiting several habitats, from forests to arable lands, probably taking advantage of high densities of insects. Perturbations occurring in these areas could threaten Eleonora’s Falcons with serious consequences at the population level. We suggest that conservation measures implemented at breeding and wintering grounds may not suffice and that temporary staging areas should be identified at a larger scale and deserve protection as well.

Capital versus income breeding in a migratory passerine bird: evidence from stable-carbon isotopes

2006 ◽  
Vol 84 (7) ◽  
pp. 947-953 ◽  
Author(s):  
K.M. Langin ◽  
D.R. Norris ◽  
T.K. Kyser ◽  
P.P. Marra ◽  
L.M. Ratcliffe
Keyword(s):  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Migratory Birds ◽  
Passerine Bird ◽  
Stable Carbon ◽  
Income Breeding ◽  
Time Period ◽  
Wintering Areas ◽  
Endogenous Reserves ◽  
Second Clutch

Birds meet the energetic demands of egg formation by using either endogenous reserves (capital breeding) or recently ingested nutrients (income breeding). Examining these strategies in migratory birds has been difficult because of the inability to assign the origin of egg nutrients. We used stable-carbon isotopes (δ13C values) to determine whether American Redstarts (Setophaga ruticilla (L., 1758)) form eggs using endogenous reserves acquired on tropical wintering areas or local dietary sources. Redstart diet tends to be enriched in 13C on tropical wintering areas; therefore, we predicted that if endogenous reserves are used to form eggs, then 13C would be enriched in first clutches relative to replacement clutches. We analyzed yolk (δ13CYK) samples from successive first, second, and third clutches and blood plasma (δ13CPL) sampled from females over the same time period. Values of δ13CYK in first-clutch and second-clutch eggs were significantly more positive than those in third-clutch eggs. Although the isotopic shift in yolk was in the direction predicted for a mixed capital–income strategy, δ13CPL, which represents the locally derived diet, varied seasonally in accordance with the shift in δ13CYK. Our findings indicate female Redstarts are primarily income breeders, forming eggs from an isotopically variable diet during the breeding season.

scholarly journals Patterns and mechanisms of heterogeneous breeding distribution shifts of North American migratory birds

2020 ◽  
Vol 51 (3) ◽  
Author(s):  
Hanna M. McCaslin ◽  
Julie A. Heath
Keyword(s):  
North American ◽  
Migratory Birds ◽  
Breeding Distribution ◽  
Distribution Shifts

Long-term winter-site fidelity in Song Sparrows (Melospiza melodia)

The Auk ◽  
2019 ◽  
Vol 136 (2) ◽  
Author(s):  
Tosha R Kelly ◽  
Keith A Hobson ◽  
Garth W Casbourn ◽  
Elizabeth A MacDougall-Shackleton ◽  
Scott A MacDougall-Shackleton
Keyword(s):  
Population Dynamics ◽  
Site Fidelity ◽  
Migratory Birds ◽  
Melospiza Melodia ◽  
Factors Affecting ◽  
Song Sparrows ◽  
Breeding Grounds ◽  
Wintering Areas ◽  
Migratory Movements

Abstract In migratory animals, the degree to which individuals return to the same wintering sites across multiple years can affect fitness and population dynamics, and thus has important implications for conservation. Despite this, long-term evaluations of wintering-site fidelity are rare for migratory birds: many populations are intensively studied on their breeding grounds but tracking the migratory movements of small birds once they leave the breeding grounds is challenging. To evaluate patterns of overwintering location and fidelity, we collected winter-grown claw tissue from 301 Song Sparrows (Melospiza melodia; 449 samples) captured in spring at their breeding grounds over 6 consecutive yr and assessed stable hydrogen isotope (δ2Hc) values to determine within-individual repeatability and between-year variation in wintering latitudes. We also retrieved useable data from 8 geolocators over 2 consecutive winters. Geolocator-derived wintering positions correlated with origins based on δ2Hc values. Consistent with previous findings, male δ2Hc values reflected more northerly wintering areas than those of females, indicating shorter latitudinal migration distances for males, but the magnitude of the sex difference varied across years. The distribution of wintering latitudes was generally consistent among years, except for the 2015 舑2016 winter, which had unusually negative δ2Hc values. Values of δ2Hc were repeatable for males but not for females, suggesting that winter-site fidelity could differ between sexes. The data presented here emphasize the importance of tracking migratory populations across multiple years to uncover factors affecting population dynamics.

scholarly journals Estimating Origins of Short-Distance Migrant Songbirds in North America: Contrasting Inferences From Hydrogen Isotope Measurements of Feathers, Claws, and Blood

The Condor ◽  
2005 ◽  
Vol 107 (2) ◽  
pp. 280-288 ◽  
Author(s):  
Daniel F. Mazerolle ◽  
Keith A. Hobson
Keyword(s):  
Hydrogen Isotope ◽  
Migratory Birds ◽  
Isotopic Signature ◽  
Zonotrichia Albicollis ◽  
Breeding Grounds ◽  
Wintering Areas ◽  
Para Determinar ◽  
Biased Estimates ◽  
Isotope Measurements

Abstract Tracing movements of migratory birds between breeding and wintering areas is important for both theoretical and conservation purposes. Intrinsic markers such as stable isotopes have received considerable attention because of their usefulness for evaluating migratory connections without the need to mark and recapture individuals. Establishing migratory linkages using stable-isotope markers hinges on knowing which tissues most accurately reflect the isotopic signature of previous feeding locations of interest. Here, we assessed the correspondence among stable-hydrogen isotope (δD) values of feathers, claws, and cellular portions of blood from migrating White-throated Sparrows (Zonotrichia albicollis) to determine if these measures provided concordant estimates of origins. δD values of claws from birds captured during spring and fall migration were positively correlated with δD values of head feathers grown on the wintering grounds and tail feathers grown on breeding grounds, respectively, indicating that claws contained information on origins of individuals. However, analyses contrasting δD measurements of base and tip of claws, and head and tail feathers suggest that a significant amount of claw growth occurred during migration resulting in biased estimates of breeding and wintering origins. Thus, for ground-foraging birds like White-throated Sparrows, we caution against using isotope measurements of claws as long-term position indicators. δD values of blood were correlated with the δD values from the base of claws, which represented the most recent claw growth, but were not correlated with the δD values of claw tips and head feathers. Thus, it appears that the δD values of blood cells are not useful for estimating wintering latitudes of White-throated Sparrows captured during spring migration. Estimación de los Orígenes de las Aves Canoras Migratorias de Corta Distancia en América del Norte: Inferencias Contrastantes a Partir de Medidas de Isótopos de Hidrógeno de las Plumas, Garras y Sangre Resumen. El seguimiento de los movimientos de las aves migratorias entre las áreas reproductivas y de invernada es importante tanto por motivos teóricos como de conservación. Los marcadores intrínsecos como los isótopos estables han recibido una atención considerable debido a su utilidad para evaluar conexiones migratorias sin la necesidad de marcar y recapturar individuos. El establecimiento de vínculos migratorios usando marcadores de isótopos estables depende del conocimiento de cuáles son los tejidos que mejor reflejan la señal isotópica de los sitios de alimentación previos de interés. En este trabajo, evaluamos la relación entre los valores de los isótopos estables de hidrógeno (δD) de las plumas, garras y porciones celulares de la sangre de individuos migratorios de Zonotrichia albicollis para determinar si estas medidas brindaban estimaciones concordantes sobre sus lugares de origen. Los valores de δD de las garras de aves capturadas durante las migraciones de primavera y otoño estuvieron correlacionados positivamente con los valores de δD de las plumas de la cabeza desarrolladas en los sitios de invernada y de las plumas de la cola desarrolladas en los sitios reproductivos, indicando que las garras contenían información sobre los orígenes invernales de los individuos. Sin embargo, los análisis que contrastaron las medidas de δD de la base y la punta de las garras, y de las plumas de la cabeza y de la cola sugieren que una cantidad significativa del crecimiento de las garras ocurrió durante la migración, generando estimaciones sesgadas de los sitios reproductivos y de invernada de origen. De este modo, para las aves que se alimentan en el suelo como Z. albicollis, sugerimos no usar medidas de isótopos de las garras como indicadores a largo plazo de la posición. Los valores de δD de la sangre estuvieron correlacionados con los valores de δD de la base de las garras, los que reflejaron el crecimiento reciente de las garras, pero no estuvieron correlacionados con los valores de δD de la punta de la garras y de las plumas de la cabeza. De este modo, parece que los valores de δD de las células sanguíneas no son útiles para estimar las latitudes de invernada de individuos de Z. albicollis capturados durante la migración de primavera.

scholarly journals Study of Spatial Distribution of Greenhouse gases (methane gas) Over Iraq using Geostatistical Analysis

2021 ◽  
Vol 227 (4) ◽  
pp. 102-116
Author(s):  
Dr.Ziena Jameel Yusif ◽  
Dr.Hussain Zaydan Ali
Keyword(s):  
Carbon Dioxide ◽  
Greenhouse Gases ◽  
Cross Validation ◽  
Migratory Birds ◽  
River System ◽  
High Concentration ◽  
Methane Gas ◽  
Geostatistical Interpolation ◽  
Wintering Areas ◽  
Water Birds

Wetlands are one of the most important natural resources on Earth. Marshes are important wintering and resting area for migratory water birds and other migratory birds. Historical data on bird migration in the Marshes suggest that they were one of the largest wintering areas for migratory water birds in the Middle East. The Iraqi marshlands lies in the floodplain which is created by the Tigris-Euphrates river system in the lower part Mesopotamia basin. The existence of water vapor, carbon dioxide, methane and ozone in the troposphere makes surface of our planet habitable. The greenhouse gases absorb thermal radiation and also emit these wavelengths, making the mean surface temperature of the earth higher, and contribute to global warming. Human activities produce large amounts of greenhouse gases, like carbon dioxide, methane, ozone and others. Methane is produced by the decomposition of plants in wetlands. Geostatistical interpolation methods are adopted in this paper. We use the analyst in ArcGIS to apply cross-validation. The cross-validation calculate some criteria to insure the  accuracy of  predictions made using the ordinary kriging method. Maps were created for methane over Iraq. Cross validation errors were calculated using ArcGIS. The produced maps assure that lower Mesopotamian basin have high concentration of Methane gas which make it as a wintering and resting area for migratory water birds.

scholarly journals Spread and Persistence of Influenza A Viruses in Waterfowl Hosts in the North American Mississippi Migratory Flyway

2015 ◽  
Vol 89 (10) ◽  
pp. 5371-5381 ◽  
Author(s):  
Anthony C. Fries ◽  
Jacqueline M. Nolting ◽  
Andrew S. Bowman ◽  
Xudong Lin ◽  
Rebecca A. Halpin ◽  
...  
Keyword(s):  
North American ◽  
Host Species ◽  
Influenza A ◽  
Migratory Birds ◽  
Influenza A Viruses ◽  
Gene Dispersal ◽  
The North ◽  
Migratory Season ◽  
Avian Origin ◽  
Migratory Corridor

ABSTRACTWhile geographic distance often restricts the spread of pathogens via hosts, this barrier may be compromised when host species are mobile. Migratory waterfowl in the order Anseriformes are important reservoir hosts for diverse populations of avian-origin influenza A viruses (AIVs) and are assumed to spread AIVs during their annual continental-scale migrations. However, support for this hypothesis is limited, and it is rarely tested using data from comprehensive surveillance efforts incorporating both the temporal and spatial aspects of host migratory patterns. We conducted intensive AIV surveillance of waterfowl using the North American Mississippi Migratory Flyway (MMF) over three autumn migratory seasons. Viral isolates (n= 297) from multiple host species were sequenced and analyzed for patterns of gene dispersal between northern staging and southern wintering locations. Using a phylogenetic and nucleotide identity framework, we observed a larger amount of gene dispersal within this flyway rather than between the other three longitudinally identified North American flyways. Across seasons, we observed patterns of regional persistence of diversity for each genomic segment, along with limited survival of dispersed AIV gene lineages. Reassortment increased with both time and distance, resulting in transient AIV constellations. This study shows that within the MMF, AIV gene flow favors spread along the migratory corridor within a season, and also that intensive surveillance during bird migration is important for identifying virus dispersal on time scales relevant to pandemic responsiveness. In addition, this study indicates that comprehensive monitoring programs to capture AIV diversity are critical for providing insight into AIV evolution and ecology in a major natural reservoir.IMPORTANCEMigratory birds are a reservoir for antigenic and genetic diversity of influenza A viruses (AIVs) and are implicated in the spread of virus diversity that has contributed to previous pandemic events. Evidence for dispersal of avian-origin AIVs by migratory birds is rarely examined on temporal scales relevant to pandemic or panzootic threats. Therefore, characterizing AIV movement by hosts within a migratory season is important for implementing effective surveillance strategies. We conducted surveillance following birds along a major North American migratory route and observed that within a migratory season, AIVs rapidly reassorted and gene lineages were dispersed primarily within the migratory corridor. Patterns of regional persistence were observed across seasons for each gene segment. We show that dispersal of AIV gene lineages by migratory birds occurs quickly along migratory routes and that surveillance for AIVs threatening human and animal health should focus attention on these routes.

scholarly journals Pair bonds during the annual cycle of a long-distance migrant, the Arctic Tern (Sterna paradisaea)

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chris P. F. Redfern
Keyword(s):  
Annual Cycle ◽  
Migratory Birds ◽  
The Arctic ◽  
Migration Routes ◽  
Long Distance ◽  
Breeding Colony ◽  
Arrival Times ◽  
Pair Bonds ◽  
Sterna Paradisaea ◽  
Wintering Areas

Abstract Background The extent to which pairs remain together during the annual cycle is a key question in the behavioural ecology of migratory birds. While a few species migrate and winter as family units, for most the extent to which breeding partners associate in the non-breeding season is unknown. The Arctic Tern (Sterna paradisaea) has one of the longest migrations of any species, and the aim of this study was to establish whether or not partners remain together after breeding. Methods Leg-mounted geolocators were fitted to breeding pairs of Arctic Terns nesting on the Farne Islands, Northumberland, UK. The devices were recovered for analysis the following year. Results Analysis of data for the six pairs which returned the following year showed that partners departed from the colony at different times after breeding and migrated independently to different Antarctic regions. Partners also departed from the Antarctic and turned to the breeding colony independently. One third of the pairs divorced on return. Conclusions For long-distance migrants reliant on unpredictable foraging opportunities, it may not be viable to remain as pairs away from the breeding colony. Synchrony in arrival times at the breeding colony may maximise the chance of retaining a familiar partner, but could be affected by environmental factors in wintering areas or along migration routes.

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