Ibis最新文献

{"title":"Moult phenology advances under hot or dry conditions for two passerines across 16 years in a Mediterranean climate","authors":"D. Julian Tattoni,&nbsp;Katie Labarbera,&nbsp;J. Nicholas Hendershot","doi":"10.1111/ibi.13417","DOIUrl":"https://doi.org/10.1111/ibi.13417","url":null,"abstract":"<p>Climate change is driving phenological shifts in migration and reproduction, yet it remains unclear how moult, the stage through which birds replace degraded feathers, is affected. Moult is a constitutive element of self-maintenance and survival and therefore investigating shifts in moult is pivotal for advancing our understanding of avian responses to climate change. Drawing on life-history theory, we proposed four non-mutually exclusive hypotheses to explain pre-basic moult phenology in a Mediterranean climate with a prolonged drought period. Specifically, we hypothesized that birds advanced their primary feather moult in response to (1) increased temperature, (2) decreased precipitation, with (3) the strongest effects of temperature in the driest years, and (4) an inverse relationship between moult start date and duration. We also investigated whether the median brood patch date (as a metric of breeding phenology) was a strong predictor of moult start date. We leverage 16 years of data for two passerine species and used Zucchini–Underhill models with multiple regressions to elucidate these patterns. Bushtits <i>Psaltriparus minimus</i> had a 27-day advancement in moult start date in the hottest years compared with the coolest, and had an inverse relationship between moult start date and duration. Song Sparrows <i>Melospiza melodia</i> had an 18-day advancement in the driest years compared with the wettest. We did not find any interaction effects between temperature and precipitation on moult. Finally, median brood patch date was not a significant predictor of the annual variability in primary moult start date for either species. The observed plasticity in moult phenology suggests long-term advancement of pre-basic moult timing for Bushtits and increased stochasticity for Song Sparrows as climate change intensifies. Our results demonstrate that moult phenology, similar to migration and reproduction, responds to changes in environmental conditions.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 4","pages":"979-990"},"PeriodicalIF":2.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145101241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The structural function of the bubbling call of the female common cuckoo (Cuculus canorus)","authors":"Sue-Jeong Jin,&nbsp;Jin-Won Lee,&nbsp;Jeong-Chil Yoo","doi":"10.1111/ibi.13412","DOIUrl":"https://doi.org/10.1111/ibi.13412","url":null,"abstract":"<p>The vocalizations of male <i>Cuculus</i> cuckoos exhibit clear interspecific differentiation, whereas female vocalizations, characterized by the distinctive bubbling calls, exhibit a high degree of similarity across species. Although structural differences in female bubbling calls among <i>Cuculus</i> cuckoos have been reported, their functional role and practical use by males for species delimitation have rarely been established. In this study, we conducted playback experiments with manipulated female calls to identify call parameters that elicit male responses in Common Cuckoos <i>Cuculus canorus</i>. To this end, we modified three parameters (number of notes, delta time and highest frequency) of female calls recorded in the field and recorded the response of males to these alterations. We found that male cuckoos exhibited varying approach rates in response to subtle changes in female calls, with responses differing according to the specific parameters: a linear relationship for the number of notes and non-linear relationships for others. Among these parameters, the highest frequency of the bubbling call appeared to be the primary criterion for delineating species boundaries. However, the overall results suggested that multiple parameters of the bubbling call, rather than a single feature, collectively contribute to species delimitation in Common Cuckoos. Further playback studies incorporating multiple manipulations of bubbling calls simultaneously would provide deeper insights into the evolution and functional significance of female calls in cuckoos.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 4","pages":"1018-1027"},"PeriodicalIF":2.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13412","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mike Harris – Obituary","authors":"Ian Newton,&nbsp;Chris Perrins","doi":"10.1111/ibi.13413","DOIUrl":"https://doi.org/10.1111/ibi.13413","url":null,"abstract":"<p>With the death of Mike Harris on 17 December 2023, at the age of 84, the world lost one of its best known, most loved and most outstanding seabird biologists. For no less than 63 years, Mike studied seabirds, and was active in the field and publishing into his last year. Research Gate lists him as having 332 publications in total and 15 927 citations, including his many collaborative studies.</p><p>As for his early life, Michael Philip Harris was born in Swansea on the Welsh coast on 28 April 1939. The son of a motor mechanic, he attended local schools and also studied at Swansea University for BSc and PhD degrees. His passions for natural history, marine life and islands were evident from an early age, with much of his boyhood spent exploring the local countryside, and developing the field-craft that served him well through later life. He was inspired by the writings of fellow Welshman, Ronald Lockley, about the very islands and bird populations on which Mike would himself subsequently work. A brief spell acting as assistant warden at the Bird Observatory on Bardsey Island, off the north Welsh coast, helped to hone his skills in trapping, handling and ringing birds.</p><p>This was followed by PhD studies on Herring Gulls <i>Larus argentatus</i> and Lesser Black-backed Gulls <i>L. fuscus</i> on Skomer Island. In the summers of 1962 and 1963, this work entailed swapping all the eggs in several Lesser Black-backed Gull colonies with eggs in Herring Gull colonies to investigate aspects of species recognition and migration, forming one of the first large-scale field experiments in British ornithology (Harris <span>1970</span>). After completing his PhD, his examiner, David Lack, offered Mike a position at the Edward Grey Institute in Oxford, spanning the period 1962–73. He began with studies of gulls, Oystercatchers <i>Haematopus ostralegus</i> and Manx Shearwaters <i>Puffinus puffinus</i> on Skokholm Island, which he combined with being warden of the Bird Observatory there, another link with Ronald Lockley. While still based at the EGI, Mike moved to the Galápogos Islands in the late 1960s to study the nesting ecology of tropical seabirds, notably storm petrels and albatrosses. He discovered that the population of Band-rumped Storm Petrels <i>Hydrobates castro</i> consisted of two sectors, one nesting in one half of the year, and the other nesting in the second half, but both using the same set of burrows (Harris <span>1969</span>). Over the same period, Mike also produced the first <i>Field Guide to the Birds of Galapagos</i> (1974) still in use today. All this early work was undertaken at a time when fieldwork logistics, especially on remote islands, were much more challenging than today, with no computers, mobile phones or bird-borne data loggers.</p><p>While on Galápagos, Mike developed a friendship with Lars-Eric Lindblad who was interested in developing sustainable eco-tourism. He provided the funding which enabled Mike to develop the syste","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"843-845"},"PeriodicalIF":1.8,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13413","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peter J. Jones 1945–2024","authors":"Robert A. Cheke","doi":"10.1111/ibi.13415","DOIUrl":"https://doi.org/10.1111/ibi.13415","url":null,"abstract":"&lt;p&gt;Peter Jones, whose ornithological career was principally concentrated on tropical topics, was also an inspirational teacher whose interests encompassed not only biology but also art and music. Peter established his reputation with innovative studies of the granivorous pest the Red-billed Quelea &lt;i&gt;Quelea quelea&lt;/i&gt; in Botswana and, later, in Nigeria alongside Peter Ward (1934–1979, &lt;i&gt;Ibis&lt;/i&gt; 123: 546–547).&lt;/p&gt;&lt;p&gt;Peter was born in Orpington in Kent in 1945 but he and his parents, James and Irene Jones, moved not long afterwards to Cheltenham where James began working at the UK Government's communications headquarters (GCHQ), so Peter was brought up in the Cotswolds where his fascination with natural history flourished. After gaining a BSc in Zoology at the University of Exeter in 1966 he joined the Edward Grey Institute of Field Ornithology at Oxford to study the ecology of Great Tits &lt;i&gt;Parus major&lt;/i&gt; supervised by Chris Perrins, leading to a PhD in 1973 for a thesis entitled ‘Some aspects of the feeding ecology of the Great Tit &lt;i&gt;Parus major&lt;/i&gt;’ and a paper with Chris on the inheritance of clutch size in Great Tits (&lt;i&gt;Condor&lt;/i&gt; 76: 225–229).&lt;/p&gt;&lt;p&gt;In 1969, Peter's association with queleas began when he worked as bird ecologist for the Government of Botswana, living in Maun until 1972. The next year he was appointed as a Senior Scientific Officer at the Centre for Overseas Pest Research (COPR), then one of the UK Government's Overseas Development Administration's scientific units which was later to be privatized and became a part of the University of Greenwich's Natural Resources Institute (NRI). At COPR he joined Peter Ward for ground-breaking work on the ecology of quelea published in &lt;i&gt;Ibis&lt;/i&gt; (118: 547–574; 118: 575–576; 119: 200–203) and the &lt;i&gt;Journal of Zoology&lt;/i&gt; (&lt;i&gt;J. Zool., Lond&lt;/i&gt;. 181: 43–56). This research, later synthesized in a series of book chapters published in 1989, formed the bedrock of our current understanding of the ecology, physiology, moult, migration and control strategies of this economically important and exceedingly numerous bird pest of small-grained cereals in sub-Saharan Africa. Having known Peter since his Oxford days, I was delighted when he agreed to work with me on projects based at NRI in the late 1990s to resume quelea work to develop forecasting models (&lt;i&gt;J. Appl. Ecol&lt;/i&gt;. 44: 523–533), in a period when we also worked with his then PhD student Martin Dallimer on migratory orientation and molecular analyses of their populations and blood parasites.&lt;/p&gt;&lt;p&gt;In 1979, Peter left COPR to become Lecturer, and later Senior Lecturer, at the Institute of Evolutionary Biology, Edinburgh University, where he remained until retirement in 2006. At Edinburgh he supervised 10 PhD students and both there and when lecturing for the Tropical Biology Association he gained a reputation as an inspiring teacher, garnering his extensive knowledge of tropical biology into concise and stimulating presentations. Some o","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"839-840"},"PeriodicalIF":1.8,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13415","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"James John Maitland Flegg (1937–2024)","authors":"Robert J. Fuller","doi":"10.1111/ibi.13414","DOIUrl":"https://doi.org/10.1111/ibi.13414","url":null,"abstract":"&lt;p&gt;Jim Flegg was born in Hong Kong but was evacuated from there to Australia with his mother in the Second World War, and it was in Australia that his interest in birds was awakened. Jim's father did not survive the defence of Hong Kong and, an only child, he came with his mother to live in Gillingham, Kent, in 1945. For much of his life, with one important ornithological interlude when appointed to the top job at the British Trust for Ornithology, his life largely revolved around Kent, the county to which he was deeply attached.&lt;/p&gt;&lt;p&gt;His enthusiasm for birds grew under the influence of a teacher at Gillingham Grammar School, G.B. Rimes. This developed into an increasingly serious engagement with bird ringing. The 1950s was a time of intense interest in what bird ringing could reveal about bird migration. Dungeness Bird Observatory, founded in 1952, was a magnetic attraction and Jim soon became a regular, often cycling the 50 or so miles from north Kent. His first visit was in 1953 at the age of 16. Qualification for a ringing permit arrived the following year under the strict guidance of Bert Axell, then warden of Dungeness RSPB Reserve. Those early years of involvement with the Observatory introduced him to many well-known characters on the bird scene one of whom, Eric Hosking, was a future collaborator on several books. Jim was to become the Observatory's longest serving trustee – 68 years!&lt;/p&gt;&lt;p&gt;Ringing in Kent continued to feature strongly in his ornithological interests throughout the 1960s and 1970s often in partnership first with David Musson and then with Chris Cox. A 10-year study of Black-headed Gulls &lt;i&gt;Chroicocephalus ridibundus&lt;/i&gt; breeding on the saltmarshes of the Medway and Swale estuaries focused on movements, dispersal and mortality. These local data were combined with national BTO data. Another 10-year project was undertaken in the woodland of High Halstow National Nature Reserve where the morphometrics and moult of Great Tits &lt;i&gt;Parus major&lt;/i&gt; and Eurasian Blue Tits &lt;i&gt;Cyanistes caeruleus&lt;/i&gt; were examined.&lt;/p&gt;&lt;p&gt;After leaving school he had started a civil engineering degree at Queen Mary College but a change of direction quickly followed in the form of a junior scientific officer post at the horticultural research station at East Malling, Kent. He completed a degree in zoology at Imperial College, followed by a PhD awarded by London University in 1967 for work on nematode vectors of plant pathogenic viruses. Jim was later to return to East Malling where he remained for the rest of his non-ornithological career and in 1997 he received an OBE for services to horticulture. Following this first period of work at East Malling, he was appointed Director of Research at the BTO in 1968 as David Snow's successor. The following year he became the BTO's first Director, a post he held until late 1975 when he returned to the world of horticultural research.&lt;/p&gt;&lt;p&gt;Jim Flegg's tenure at the BTO came at a time when the organization was be","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"841-842"},"PeriodicalIF":1.8,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wintering area and experience effects on spring migration strategies, timing and breeding success in Icelandic-nesting Common Scoters (Melanitta nigra)","authors":"Snæþór Aðalsteinsson,&nbsp;Ib Krag Petersen,&nbsp;Anthony D. Fox","doi":"10.1111/ibi.13411","DOIUrl":"https://doi.org/10.1111/ibi.13411","url":null,"abstract":"<p>Earlier spring arrival of migratory birds to breeding sites and advanced breeding often bring enhanced reproductive success but demand good body-condition. When populations exhibit extensive winter distributions, the differing energetic costs associated with the quality and migration distance to each wintering area can have implications for individual breeding performance. Using light-level geolocator data from 30 female Common Scoters <i>Melanitta nigra</i> marked at their northeast Iceland breeding site, we explored the extent to which spring migration strategy, arrival and breeding times, and breeding success were related to minimum migration distances from wintering areas to breeding site in multiple years. Because many females produced multiple years of data, we further tested the degree to which individuals used their experience to arrive and breed earlier with increasing age. The females wintered <i>c</i>. 1000–4200 km from the breeding site, yet mostly (87% of 67 tracks) 1000–2000 km away. Increased distance was significantly related to earlier departure from wintering areas (<i>c</i>. 9 days/1000 km), longer stopover time <i>en route</i> and later arrival to breeding sites (<i>c</i>. 6 days/1000 km). Timing of breeding was unrelated to arrival time or migration distance, but significantly advanced with increasing female age (excluding one outlier). Increased migration costs associated with more distant wintering areas do not therefore seem to carry over to affect subsequent timing of breeding despite later arrival, potentially as a consequence of the higher quality of those wintering areas or adequate time after arrival to replenish depleted energy stores. However, further study is needed to elucidate potential effects of breeding time and/or migration distance on breeding success.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 4","pages":"945-961"},"PeriodicalIF":2.1,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13411","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"British Ornithologists' Union – Godman Salvin Prize","authors":"Keith Hamer","doi":"10.1111/ibi.13396","DOIUrl":"https://doi.org/10.1111/ibi.13396","url":null,"abstract":"","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 3","pages":"846-847"},"PeriodicalIF":1.8,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13396","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Large-scale depth-related seasonal distribution patterns of a benthic-feeding sea duck in two contrasting marine systems","authors":"Anthony D. Fox,&nbsp;Johanna Osterberg,&nbsp;Ib K. Petersen,&nbsp;Thorsten J. S. Balsby,&nbsp;Nele Markones,&nbsp;Philipp Schwemmer,&nbsp;Stefan Garthe","doi":"10.1111/ibi.13409","DOIUrl":"https://doi.org/10.1111/ibi.13409","url":null,"abstract":"<p>Moulting and overwintering Common Scoter <i>Melanitta nigra</i> aggregate in largely undisturbed, shallow-water marine areas, preying upon sessile benthic organisms (mainly bivalves), which do not reproduce during this period of exploitation. Assuming even prey distribution, we predict that Common Scoters would aggregate to moult in shallowest waters with most accessible prey in July, where diving costs were minimal, but would disperse to deeper (i.e. comparatively less profitable) waters through the season as Common Scoter numbers increase and (potentially) as their prey are depleted in winter. To test these hypotheses, we used multiple aerial survey count data to study Common Scoter distribution patterns in Aalborg Bugt, Denmark (in relatively sheltered areas subject to restricted tidal influence), and along the more exposed, highly tidal Schleswig-Holstein North Sea coast in the German Bight. Despite these physical differences, Common Scoters displayed similar distribution patterns in both areas, showing significant increases in mean water depth (from 6.3 m in July to 9.8 m in March in Denmark, 6.5–10.3 m in Germany), number of flock units (432 to 1614; 48 to 581) and the percentage of 3 × 3 km grid squares occupied by birds as the season progressed (15% to 44% of 628 grid cells; 1% to 39% of 408 grid cells). The results support our hypotheses that these consumers distribute themselves to maximize their nutritional and energetic intake, while minimizing costs of gaining food in two contrasting marine environments, but we require sequential sampling of their food supply at differing water depths to confirm the causes of these observed patterns.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 4","pages":"882-894"},"PeriodicalIF":2.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13409","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Associations of extreme weather, El Niño events, and streamflow with the annual apparent survival of a migratory riparian bird in the western United States","authors":"Liz Allocca,&nbsp;Kyle D. Kittelberger,&nbsp;Çağan Hakkı Şekercioğlu,&nbsp;Diana Bell,&nbsp;James J. Gilroy","doi":"10.1111/ibi.13407","DOIUrl":"https://doi.org/10.1111/ibi.13407","url":null,"abstract":"<p>Neotropical avian migrants are affected by environmental change throughout their full annual cycles. In the southwestern United States, these species rely on riparian corridors for food and water, for migration stopover sites, and as breeding grounds. Climate change imperils these essential ecosystems, with the southwest predicted to become hotter and more arid, thus resulting in more frequent extreme heat and drought. The tropical forests of Latin America, where many Neotropical migrants overwinter, face similar threats. The impacts of these changes on the demography of migratory riparian species remains poorly understood. We analysed 13 years of capture–mark–recapture bird banding data (2011–2023) from southern Utah to examine the effects of age-class and a range of environmental variables on the survival of a common migratory and riparian breeding bird, the Western Yellow-breasted Chat <i>Icteria virens auricollis</i>. We found that adult chats had a significantly greater probability of survival than first-year birds (mean survival adults: 0.53 ± 0.11; juveniles: 0.12 ± 0.07). While rates of survival differed for the two age-classes, the variability was closely matched across years, indicating that both adults and juveniles are impacted similarly by ecological factors. We also found that annual survival rates were particularly sensitive to the El Niño-Southern Oscillation (ENSO) cycle, with El Niño events being associated with reduced chat survival. This suggests a key negative impact of drier, hotter conditions during migration and on the wintering grounds in Central America—conditions that may become increasingly extreme with future climate change. We also found near-significant negative effects of breeding season heat events (% of days with maximum temperature exceeding the 90th percentile of a 30-year baseline) and spring precipitation, as well as a potential positive association between chat survival and breeding season streamflow. Our results not only demonstrate the importance of environmental variation across the full annual cycle of chats in driving variation in survival, but also highlight how future climate change may impact the demography of a key riparian species.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 4","pages":"1002-1017"},"PeriodicalIF":2.1,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13407","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145102255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unexpected spatial aggregation between two species of hummingbirds and their inconsistent spatial interactions with native and exotic plants in an urban ecological reserve","authors":"Gonzalo A. Ramírez-Cruz,&nbsp;Israel Solano-Zavaleta,&nbsp;J. Jaime Zúñiga-Vega,&nbsp;P. Montserrat Vilchis-Domínguez,&nbsp;Mariana Palencia-Martínez","doi":"10.1111/ibi.13408","DOIUrl":"https://doi.org/10.1111/ibi.13408","url":null,"abstract":"<p>Hummingbirds play an important role as pollinators and are one of the primary examples of animal–plant coevolution. However, factors such as land-use change, urbanization, exotic species introductions and the disappearance of native plants can negatively affect the persistence of hummingbird populations. Thus, understanding the ecological factors that may favour their presence is essential for their effective conservation in urban areas. We conducted repeated surveys in a native scrubland reserve within Mexico City from 2015 to 2018, and used conditional two-species occupancy models to estimate a species interaction factor, and to analyse the effect of five native plants (<i>Agave salmiana</i>, <i>Echeveria gibbiflora</i>, <i>Opuntia lasiacantha</i>, <i>O. tomentosa</i> and <i>Wigandia urens</i>) and one exotic plant (<i>Leonotis nepetifolia</i>) on the occupancy probability of two hummingbirds: the Broad-billed Hummingbird (<i>Cynanthus latirostris</i>) and the Berylline Hummingbird (<i>Saucerottia beryllina</i>). Considering that both of the hummingbird species could be competing for similar resources, we also tested the effect of the presence of the Berylline Hummingbird on the occupancy of the Broad-billed Hummingbird, assuming its dominance based on larger body-size. We found evidence of positive spatial interactions between plants and hummingbirds, but we did not find these to be consistent throughout the 3 years of monitoring, which could indicate a modification of the original hummingbird–plant interaction networks resulting from urban disturbance. In addition, there were no negative spatial interactions between the two hummingbirds. Instead, we detected an aggregation of both species during two separate seasons, probably owing to one species using the other as a cue for profitable sites. Even though the populations of these two hummingbird species can thrive in an urban ecosystem, changes in spatial interactions might reflect alterations on the structure and functioning of a community. Therefore, we consider it crucial to continue studying their population dynamics and their implications for the conservation of urban hummingbirds.</p>","PeriodicalId":13254,"journal":{"name":"Ibis","volume":"167 4","pages":"927-944"},"PeriodicalIF":2.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ibi.13408","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145102340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}