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Long-term monitoring data reveal effects of age,population density,and environmental aspects on hatching success of Common Cranes(Grus grus)

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Avian Research 2022年第3期13卷 347-355页

作者： Isabel Barwisch Wolfgang Mewes Angela Schmitz Ornes AG vogelwarte Zoological Institute and MuseumUniversity of GreifswaldSoldmannstr.23GreifswaldGermany Grüner Weg 3 19395Plau Am SeeOT KarowGermany

Facing climate and land use change,a species’ability to successfully adapt to changing environments is crucial for its *** drainage and intensification of agriculture and forestry set wetlands and associated species at risk of population *** population of Common Cranes(Grus grus)has experienced considerable fluctuations over the last *** increasing population numbers,hatching success seemed to have decreased over the last *** aim of this study was to identify factors influencing hatching success and nest survival of Common Cranes based on analyses of long-term individual-based monitoring data from northeastern Germany and evaluate the species ability to adapt to changing *** success decreased over the course of the study period from 0.75 to ***,nest survival and hatching success did not vary across different nesting habitats,whereas factors such as female age,timing of nest initiation and breeding pair density were found to have significant effects on hatching *** females showed higher hatching success,even though the proportion of unhatched eggs was highest in females aged 20 years or *** nest initiation had a positive effect on hatching *** levels are more favorable early in the nesting season,whereas increasing evaporation with time causes water levels to decrease,granting easier access for *** of female age,hatching success decreased with increasing numbers of breeding pairs within a 2-km radius around a nesting *** population densities intensify competition for resources and promote intraspecific interactions,affecting reproductive outcome *** study gives first insights into mechanisms behind population regulation in Common Cranes,highlighting the importance of population dynamics and individual *** suggest to further investigate density dependent effects including landscape and habitat features as well as reproduct

关键词： Adaptation Age Cranes Grus grus Habitat Nest survival Population density Reproduction

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Migration routes and strategies of Grey Plovers (Pluvialis squatarola) on the East Atlantic Flyway as revealed by satellite tracking

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Avian Research 2019年第3期10卷 305-318页

作者： Klaus-Michael Exo Franziska Hillig Franz Bairlein Institute of Avian Research Vogelwarte Helgoland

Background:While the general migration routes of most waders are known,details concerning connectivity between breeding grounds, stopover sites and wintering grounds are often *** information is critical from the conservation perspective and necessary for understanding the annual *** are especially needed to identify key stopover sites in remote regions. Using satellite transmitters, we traced spring and autumn migration routes and connectivity of Grey Plovers on the East Atlantic *** findings also revealed the timing,flight speed, and duration of migrations. Methods:We used ARGOS satellite transmitters to track migration routes of 11 Grey Plovers that were captured at the German Wadden Sea where they had stopped during *** were monitored for up to 3 years,***:Monitoring signals indicated breeding grounds in the Taimyr and Yamal regions;important staging sites on the coasts of the southern Pechora Sea and the Kara Sea;and wintering areas that ranged from NW-Ireland to Guinea *** average distance traveled from wintering grounds to breeding grounds was 5534 km. Migration duration varied between 42 and 152 days;during this period birds spent about 95% of the time at staging *** spring most plovers crossed inland Eastern Europe, whereas in autumn most followed the *** all of the birds departed during favorable wind conditions within just 4 days (27-30 May) on northward migration from the Wadden *** spring birds migrated significantly faster between the Wadden Sea and the Arctic than on return migration in autumn (12 vs.37 days),with shorter stopovers during the northward ***:Our study shows that satellite tags can shed considerable light on migration strategies by revealing the use of different regions during the annual cycle and by providing detailed quantitative data on population connectivity and migration timing.

关键词： Annual cycle Long-distance migration Migration speed Migration strategy Migration timing Satellite transmitters Shorebirds Tracking Stopover

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Nest site tenacity and mate fidelity in the Black-headed Gull(Chroicocephalus ridibundus)

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Avian Research 2021年第4期12卷 664-670页

作者： Simon Piro Angela Schmitz Ornés vogelwarte Zoological Institute and MuseumUniversity of GreifswaldSoldmannstr.23GreifswaldGermany

Breeding philopatry is well known in the Black-headed Gull(Chroicocephalus ridibundus).Using a capture-markrecapture method,we studied if Black-headed Gulls show nest site tenacity and mate fidelity as well,and investigated if there are differences between a stable,and a newly established and fast-growing colony,as well as for differences between the center and edges of these colonies located in north-eastern *** found a high level of nest site tenacity in the center of the stable colony on B?hmke Island,and lower degrees of nest site tenacity at the edge of the same colony and in the newly established and fast-growing colony on Riether *** fidelity was very strong in all individuals which returned to their previous breeding place,regardless of the nest site location.

关键词： Black-headed Gull Croicocephalus ridibundus Mate fidelity Nest site tenacity Philopatry

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Migration phenology determines niche use of East Asian buntings (Emberizidae)during stopover

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Current Zoology 2018年第6期64卷 681-692页

作者： Wieland HEIM Jana A.ECCARD Franz BAIRLEIN Institute of Landscape Ecology Munster UniversityHeisenbergstraβe 2Munster48149Germany Animal Ecology Institute of Biology and BiochemistryUniversitat PotsdamMaulbeerallee 1Potsdam14469Germany Institute of Avian Research "vogelwarte Helgoland" An der Vogelwarte 21Wilhelmshaven28386Germany

Stopover niche utilization of birds during migration has not gained much attention so far,since the majority of the studies focuses on breeding or wintering ***,stopover sites are crucial for migratory *** are often used by a multitude of species,which could lead to increased *** this work,we investigated niche use of 8 migratory and closely related Emberiza bunting species at a stopover site in Far East Russia,situated on the poorly studied East Asian *** used bird ringing data to evaluate morphological similarity as well as niche overlap on the trophic,spatial,and temporal *** morphology was used as a proxy for their trophic *** were able to prove that a majority of the species occupies well-defined stopover niches on at least one of the *** breadth and niche overlap differ between spring and autumn season with higher overlap found during *** differences are mostly related to overall size and wing *** temporal dimension is most important for segregation among the studied ***,all species seem to exhibit a rather strict and consistent phenological *** occurrence at the study site is highly correlated with their geographic origin and the length of their migration *** assume that buntings are able to use available resources opportunistically during stopover,while trying to follow a precise schedule in order to avoid competition and to ensure individual fitness.

关键词： bird migration Emberiza habitat use non-breeding phenology stopover

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Factors determining stopover decisions in migrating passerines on a small island

Factors determining stopover decisions in migrating passerin...

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23rd International Ornithological Congress

作者： Volker Dierschke Inst. Vogelforschung “vogelwarte Helgoland” D-27494 Helgoland Germany

＜正＞ During migration between breeding and wintering areas, many passerines stop over on the small offshore island Helgoland （North Sea） in spring and autumn. There, about 50 km offshore, a bird of passage has no opportunity to search for any suitable surrounding habitat, and has to decide whether local conditions for resting/refuelling are adequate or to depart and continue migration forthwith. Several factors possibly influencing this decision were investigated in a five-year study of several species, the main target of which was the Northern Wheatear

关键词： stopover ecology departure decision passerine migration

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Adaptive evolution of migratory behavior

Adaptive evolution of migratory behavior

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23rd International Ornithological Congress

作者： Francisco Pulido Max Planck Research Center for Ornithology Vogelwarte D-78315 Radolfzell Germany

The conditions under which different migration patterns evolved have constantly been changing. Therefore, migratory behavior has always been subject to evolutionary change. At present, this is becoming particularly apparent as rapid climatic wanning is causing major shifts in avian migration patterns. Here, I shall review recent work on genetic variation, changes and constraints on the evolution of migratory behavior, and discuss their implications for adaptive evolution of avian migration.

关键词： blackcap natural selection quantitative genetics reaction norm genetic constraint

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Revealing the control of migratory fueling： An integrated approach combining laboratory and field studies in northern wheatears Oenanthe oenanthe

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Current Zoology 2013年第3期59卷 381-392页

作者： Franz BAIRLEIN Volker DIERSCHKE Julia DELINGAT Cas EIKENAAR Ivan MAGGINI Marc BULTE Heiko SCHMALJOHANN Institute of Avian Research "vogelwarte Helgoland" Wilhelmshaven Germany Gavia EcoResearch Toennhaeuser Dorfstr. 20 21423 Winsen (Luhe) Germany Advanced Facility for Avian Research University of Western Ontario 1151 Richmond Street London ON N6G 1G9 Canada

Migratory birds rely on fueling prior to migratory flights. Fueling in migrants is controlled by intrinsic as well as extrinsic factors. From captive studies we have started understanding the internal mechanisms controlling bird migration. Field studies have demonstrated the effects of external factors, such as food availability, weather, competitors, parasites or diseases, on the stopover behavior of migrants. However, an integrated approach is still missing to study coherently how the innate migration program interacts with the varying environmental cues and to estimate the contribution of the innate migration program and the environment to realized migration. The northern wheatearOenanthe oenantheoffers a unique opportunity for integrated studies. It breeds across almost the whole Holarctic with just a “gap” between eastern Canada and Alaska. All breeding populations overwinter in sub-Saharan Africa which makes the northern wheatear one of the most long-distant migratory songbirds with extraordinary long non-stop flights across oceans. It is a nocturnal migrant which travels without parental or social aid/guidance. Thus, young birds rely entirely on endogenous mechanisms of timing, route selection and fueling on their first outbound migration. By establishing indoor housing under controlled conditions the endogenous control mechanisms of northern wheatear migration could be revealed. At the same time, environmental factors controlling fueling could be investigated in the field. On migration wheatears occur in a variety of habitats with sparse vegetation where their stopover behavior could be quantitatively studied in the light of “optimal migration” theory by the use of remote balances, radio-tagging and even experimentally manipulated food availability. The present paper summarizes our approach to understand the control of migration in northern wheatears by combining field and laboratory studies at various spatial and temporal scales, and linking various sub-dis

关键词：内部控制鸟类迁徙实验室水芹北方环境因素粮食供应现场研究

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Offshore wind-parks and birds: estimating flight altitudes of birds over sea by combining diverse data from radar and visual observations

Offshore wind-parks and birds: estimating flight altitudes o...

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23rd International Ornithological Congress

作者： Helmut Wendeln Ommo Hüppop Wilhelm Ruhe Institut fur Vogelforschung “vogelwarte Helgoland” An der Vogelwarte 21 D-26386 Wilhelmshaven Germany Institut fur Vogelforschung “vogelwarte Helgoland” Inselstation Helgoland P.O. Box1220 D-27494 Helgoland Germany Amt fur Wehrphysik Mont Royal D-56841 Traben-Trarbach Germany

＜正＞ Producing electricity from large offshore wind-parks is an economically promising development in Germany. However, little is known of the potential effects of the parks on birds, either on those that might roost or forage there or on passage migrants. Towards minimising potentially deleterious impacts, we set out to obtain information about bird movements in the North and Baltic Seas in space and time, and about the altitudinal distribution of flying birds. Previous data on the heights at which birds fly over the seas came from large-scale

关键词： migration flight altitude radar offshore wind-parks

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Frugivory and seed dispersal in the Galápagos:what is the state of the art?

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Integrative Zoology 2011年第2期6卷 110-129页

作者： Ruben HELENO Stephen BLAKE Patricia JARAMILLO Anna TRAVESET Pablo VARGAS Manuel NOGALES Mediterranean Institute of Advanced Studies(CSIC-UIB) Terrestrial Ecology GroupMallorcaBalearic Islands Royal Botanical Garden Madrid(CSIC-RJB) Madrid Island Ecology and Evolution Research Group(CSIC-IPNA) TenerifeCanary IslandsSpain Max Planck Institute for Ornithology Vogelwarte RadolfzellRadolfzellGermany Charles Darwin Foundation Puerto AyoraSanta CruzGalapagosQuitoEcuador

The Galápagos are considered a model oceanic archipelago,with unique flora and fauna currently threatened by alien invasive *** dispersal is an important ecosystem function with consequences for plant population dynamics and vegetation ***,understanding the seed dispersal abilities of the assemblages of frugivores will inform scientists and managers of the dynamics of plant invasions and improve management *** we provide the first comprehensive review of published information on frugivory and animal seed dispersal in the Galá*** collected data from a variety of sources,including notes of the first naturalist expeditions,gray literature available only in Galápagos collections,and peer-reviewed journal ***–animal frugivorous interactions were retrieved from 43 studies and compiled into an interaction matrix describing 366 unique *** studies focused on fruit consumption as a driving force for natural selection,but seed fate was seldom *** most(71%)of the interactions involved native plants,more than one-quarter(28%)involved introduced *** involving birds are considerably more common than those of reptiles and mammals,probably reflecting a research bias towards *** the historical importance of the archipelago as the laboratory for evolutionary and ecological research,understanding of its seed dispersal systems is *** end the review by suggesting 3 priority areas of research on frugivory and seed dispersal in the Galápagos:(i)target research to close knowledge gaps;(ii)the use of a network approach to frame seed dispersal at the community level;and(iii)evaluation of the effect of seed dispersal as a selective pressure acting upon plants and ***,the output of this research has to be properly delivered to the Galápagos National Park Services to help increase management effectiveness.

关键词： conservation planning oceanic islands plant invasions plant-animal interaction seed predation

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