1
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Bottini CLJ, Whiley RE, Branfireun BA, MacDougall-Shackleton SA. Effects of sublethal methylmercury and food stress on songbird energetic performance: metabolic rates, molt and feather quality. J Exp Biol 2024; 227:jeb246239. [PMID: 38856174 DOI: 10.1242/jeb.246239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 05/28/2024] [Indexed: 06/11/2024]
Abstract
Organisms regularly adjust their physiology and energy balance in response to predictable seasonal environmental changes. Stressors and contaminants have the potential to disrupt these critical seasonal transitions. No studies have investigated how simultaneous exposure to the ubiquitous toxin methylmercury (MeHg) and food stress affects birds' physiological performance across seasons. We quantified several aspects of energetic performance in song sparrows, Melospiza melodia, exposed or not to unpredictable food stress and MeHg in a 2×2 experimental design, over 3 months during the breeding season, followed by 3 months post-exposure. Birds exposed to food stress had reduced basal metabolic rate and non-significant higher factorial metabolic scope during the exposure period, and had a greater increase in lean mass throughout most of the experimental period. Birds exposed to MeHg had increased molt duration, and increased mass:length ratio of some of their primary feathers. Birds exposed to the combined food stress and MeHg treatment often had responses similar to the stress-only or MeHg-only exposure groups, suggesting these treatments affected physiological performance through different mechanisms and resulted in compensatory or independent effects. Because the MeHg and stress variables were selected in candidate models with a ΔAICc lower than 2 but the 95% confidence interval of these variables overlapped zero, we found weak support for MeHg effects on all measures except basal metabolic rate, and for food stress effects on maximum metabolic rate, factorial metabolic scope and feather mass:length ratio. This suggests that MeHg and food stress effects on these measures are statistically identified but not simple and/or were too weak to be detected via linear regression. Overall, combined exposure to ecologically relevant MeHg and unpredictable food stress during the breeding season does not appear to induce extra energetic costs for songbirds in the post-exposure period. However, MeHg effects on molt duration could carry over across multiple annual cycle stages.
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Affiliation(s)
- Claire L J Bottini
- The University of Western Ontario, Department of Biology, 1151 Richmond St., London, ON, Canada, N6A 5B7
- Advanced Facility for Avian Research, University of Western Ontario, London, ON, N6G 4W4, Canada
| | - Rebecca E Whiley
- The University of Western Ontario, Department of Biology, 1151 Richmond St., London, ON, Canada, N6A 5B7
- Advanced Facility for Avian Research, University of Western Ontario, London, ON, N6G 4W4, Canada
| | - Brian A Branfireun
- The University of Western Ontario, Department of Biology, 1151 Richmond St., London, ON, Canada, N6A 5B7
- Advanced Facility for Avian Research, University of Western Ontario, London, ON, N6G 4W4, Canada
| | - Scott A MacDougall-Shackleton
- Advanced Facility for Avian Research, University of Western Ontario, London, ON, N6G 4W4, Canada
- The University of Western Ontario, Department of Psychology, 1151 Richmond St., London, ON, N6A 5C2, Canada
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2
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Cornelius JM, Hahn TP, Robart AR, Vernasco BJ, Zahor DL, Glynn KJ, Navis CJ, Watts HE. Seasonal Patterns of Fat Deposits in Relation to Migratory Strategy in Facultative Migrants. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.691808] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Physiological preparations for migration generally reflect migratory strategy. Migrant birds fuel long-distance flight primarily with lipids, but carrying excess fuel is costly; thus, the amount of fat deposited prior to departure often reflects the anticipated flight duration or distance between refueling bouts. Seasonal pre-migratory deposition of fat is well documented in regular seasonal migrants, but is less described for more facultative species. We analyze fat deposits of free-living birds across several taxa of facultative migrants in the songbird subfamily Carduelinae, including house finches (Haemorhous mexicanus), American goldfinches (Spinus tristis), pine siskins (Spinus pinus) and four different North American ecotypes of red crossbills (Loxia curvirostra), to evaluate seasonal fat deposition during facultative migratory periods. Our data suggest that the extent of seasonal fat deposits corresponds with migratory tendency in these facultative taxa. Specifically, nomadic red crossbills with a seasonally predictable annual movement demonstrated relatively large seasonal fat deposits coincident with the migratory periods. In contrast, pine siskins, thought to be more variable in timing and initiation of nomadic movements, had smaller peaks in fat deposits during the migratory season, and the partial migrant American goldfinch and the resident house finch showed no peaks coincident with migratory periods. Within the red crossbills, those ecotypes that are closely associated with pine habitats showed larger peaks in fat deposits coincident with autumn migratory periods and had higher wing loading, whereas those ecotypes associated with spruces, Douglas-fir and hemlocks showed larger peaks coincident with spring migratory periods and lower wing loading. We conclude that population averages of fat deposits do reflect facultative migration strategies in these species, as well as the winter thermogenic challenges at the study locations. A difference in seasonal fattening and wing loading among red crossbill ecotypes is consistent with the possibility that they differ in their migratory biology, and we discuss these differences in light of crossbill reproductive schedules and phenologies of different conifer species.
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3
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Stager M, Senner NR, Tobalske BW, Cheviron ZA. Body temperature maintenance acclimates in a winter-tenacious songbird. J Exp Biol 2020; 223:jeb221853. [PMID: 32376710 DOI: 10.1242/jeb.221853] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 05/04/2020] [Indexed: 12/16/2022]
Abstract
Flexibility in heat generation and dissipation mechanisms provides endotherms the ability to match their thermoregulatory strategy with external demands. However, the degree to which these two mechanisms account for seasonal changes in body temperature regulation is little explored. Here, we present novel data on the regulation of avian body temperature to investigate how birds alter mechanisms of heat production and heat conservation to deal with variation in ambient conditions. We subjected dark-eyed juncos (Junco hyemalis) to chronic cold acclimations of varying duration and subsequently quantified their metabolic rates, thermal conductance and ability to maintain normothermia. Cold-acclimated birds adjusted traits related to both heat generation (increased summit metabolic rate) and heat conservation (decreased conductance) to improve their body temperature regulation. Increases in summit metabolic rate occurred rapidly, but plateaued after 1 week of cold exposure. In contrast, changes to conductance occurred only after 9 weeks of cold exposure. Thus, the ability to maintain body temperature continued to improve throughout the experiment, but the mechanisms underlying this improvement changed through time. Our results demonstrate the ability of birds to adjust thermoregulatory strategies in response to thermal cues and reveal that birds may combine multiple responses to meet the specific demands of their environments.
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Affiliation(s)
- Maria Stager
- Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
| | - Nathan R Senner
- Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - Bret W Tobalske
- Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
| | - Zachary A Cheviron
- Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
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4
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Beltran RS, Burns JM, Breed GA. Convergence of biannual moulting strategies across birds and mammals. Proc Biol Sci 2019; 285:rspb.2018.0318. [PMID: 29769361 DOI: 10.1098/rspb.2018.0318] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 04/16/2018] [Indexed: 12/31/2022] Open
Abstract
Birds and mammals have developed numerous strategies for replacing worn feathers and hair. Moulting usually occurs on an annual basis; however, moults that take place twice per year (biannual moults) also occur. Here, we review the forces driving the evolution of various moult strategies, focusing on the special case of the complete biannual moult as a convergence of selection pressures across birds and mammals. Current evidence suggests that harsh environmental conditions or seasonality (e.g. larger variation in temperatures) drive evolution of a biannual moult. In turn, the biannual moult can respond to secondary selection that results in phenotypic alteration such as colour changes for mate choice dynamics (sexual selection) or camouflage requirements (natural selection). We discuss the contributions of natural and sexual selection to the evolution of biannual moulting strategies in the contexts of energetics, niche selection, functionality and physiological mechanisms. Finally, we suggest that moult strategies are directly related to species niche because environmental attributes drive the utility (e.g. thermoregulation, camouflage, social dynamics) of the hair or feathers. Functional efficiency of moult may be undermined if the pace of evolution fails to match that of the changing climate. Thus, future research should seek to understand the plasticity of moult duration and phenology, especially in the context of annual cycles.
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Affiliation(s)
- Roxanne S Beltran
- Department of Biology and Wildlife, University of Alaska Fairbanks, 101 Murie Building, 982 Koyukuk Drive, Fairbanks, AK 99775, USA .,Department of Biological Sciences, University of Alaska Anchorage, 3101 Science Circle, Anchorage, AK 99508, USA
| | - Jennifer M Burns
- Department of Biological Sciences, University of Alaska Anchorage, 3101 Science Circle, Anchorage, AK 99508, USA
| | - Greg A Breed
- Department of Biology and Wildlife, University of Alaska Fairbanks, 101 Murie Building, 982 Koyukuk Drive, Fairbanks, AK 99775, USA.,Institute of Arctic Biology, University of Alaska Fairbanks, 311 Irving I, Fairbanks, AK 99775, USA
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5
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Reproductive success delays moult phenology in a polar mammal. Sci Rep 2019; 9:5221. [PMID: 30914781 PMCID: PMC6435649 DOI: 10.1038/s41598-019-41635-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 03/12/2019] [Indexed: 02/02/2023] Open
Abstract
Animals can respond to dynamic environments through phenological plasticity of life history events; however, changes in one part of the annual cycle can diminish the success of subsequent life history events. Our aims were to determine the associations between reproduction and moult phenology across years and to quantify phenological plasticity across varying environmental conditions. We conducted demographic surveys of 4,252 flipper-tagged Weddell seals (Leptonychotes weddellii) in the Ross Sea, Antarctica during four austral summers. At each sighting, seals were assigned a moult code based on the visible presence of new fur and the start date of each animal’s moult was back-calculated. Reproductive success and parturition dates were obtained for the breeding season prior to and following the moult. We found that successful reproduction delayed moult by 16 days relative to non-parturient females. Phenology of the intervening moult was indicative of previous reproductive dynamics but not predictive of subsequent reproductive outcomes. Across years, moult phenology varied by about two weeks and covaried strongly with sea ice break-out timing for all reproductive categories. Our findings suggest these polar mammals have some flexibility within the annual cycle that allows adjustment of moult phenology to fluctuating environmental conditions without compromising future reproductive success.
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6
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Déry F, Hamel S, Côté SD. Getting ready for the winter: Timing and determinants of molt in an alpine ungulate. Ecol Evol 2019; 9:2920-2932. [PMID: 30891226 PMCID: PMC6405896 DOI: 10.1002/ece3.4970] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 01/14/2019] [Accepted: 01/16/2019] [Indexed: 01/07/2023] Open
Abstract
Because growth of new hairs entails energetic costs, individual condition and access to food should determine the timing of molt. Previous studies on the timing of molt in ungulates have mostly focused on the influence of age class and reproductive status, but the effects of body condition and environmental phenology have not been evaluated. Our goal was to assess how intrinsic traits and environmental conditions determine the timing of winter coat shedding in a mountain goat population monitored for 27 years. The date of molt completion followed a U shape with age, suggesting that senescence occurs in terms of the molting process in mountain goats. Juveniles of both sexes delayed molting in a similar fashion, but molt timing differed between sexes during adulthood. Males molted progressively earlier until reaching age when reproduction peaked, after which they started delaying molting again. Females reached earliest molt dates at age of first reproduction and then progressively delayed molt date. Lactating females molted 10 days later than barren females on average, but this only occurred in females in good condition. Thus, although it has been shown that reproduction delays molt in ungulates, our results indicate that body condition can override this effect. Overall, our results revealed that access to both extrinsic and intrinsic resources is one of the key mechanisms driving molting processes in a mammalian herbivore.
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Affiliation(s)
- Florent Déry
- Département de biologie and Centre d’études nordiquesUniversité LavalQuébecQuébecCanada
| | - Sandra Hamel
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries, and EconomicsUiT The Arctic University of NorwayTromsøNorway
| | - Steeve D. Côté
- Département de biologie and Centre d’études nordiquesUniversité LavalQuébecQuébecCanada
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7
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Podofillini S, Cecere JG, Griggio M, Corti M, De Capua EL, Parolini M, Saino N, Serra L, Rubolini D. Benefits of extra food to reproduction depend on maternal condition. OIKOS 2019. [DOI: 10.1111/oik.06067] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Stefano Podofillini
- Dipto di Scienze e Politiche Ambientali, Univ. degli Studi di Milano via Celoria 26, IT‐20133 Milano Italy
| | - Jacopo G. Cecere
- Area Avifauna Migratrice, Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA) Ozzano Emilia (BO) Italy
| | - Matteo Griggio
- Dipto di Biologia, Univ. degli Studi di Padova Padova Italy
| | - Margherita Corti
- Dipto di Scienze e Politiche Ambientali, Univ. degli Studi di Milano via Celoria 26, IT‐20133 Milano Italy
| | | | - Marco Parolini
- Dipto di Scienze e Politiche Ambientali, Univ. degli Studi di Milano via Celoria 26, IT‐20133 Milano Italy
| | - Nicola Saino
- Dipto di Scienze e Politiche Ambientali, Univ. degli Studi di Milano via Celoria 26, IT‐20133 Milano Italy
| | - Lorenzo Serra
- Area Avifauna Migratrice, Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA) Ozzano Emilia (BO) Italy
| | - Diego Rubolini
- Dipto di Scienze e Politiche Ambientali, Univ. degli Studi di Milano via Celoria 26, IT‐20133 Milano Italy
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8
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Liu G, Shafer ABA, Hu X, Li L, Ning Y, Gong M, Cui L, Li H, Hu D, Qi L, Tian H, Wang B. Meta-barcoding insights into the spatial and temporal dietary patterns of the threatened Asian Great Bustard ( Otis tarda dybowskii) with potential implications for diverging migratory strategies. Ecol Evol 2018; 8:1736-1745. [PMID: 29435248 PMCID: PMC5792609 DOI: 10.1002/ece3.3791] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 11/24/2017] [Accepted: 12/06/2017] [Indexed: 01/17/2023] Open
Abstract
Food resources are often not sufficient to satisfy the nutritional and energetic requirements during winter conditions at high latitudes. Dietary analysis is a prerequisite to fully understanding the feeding ecology of a species and the nature of trophic interactions. Previous dietary studies of Asian Great Bustard (Otis tarda dybowskii) relied on behavioral observations, resulting in categorization of diet limited to broad taxonomic groupings. Here, we applied a high-throughput sequencing meta-barcoding approach to quantify the diet of resident and migratory Asian Great Bustard in three wintering sites during early winter and late winter. We detected 57 unique plant taxa in the bustard diet, among which 15 species were confirmed by a local plant database we generated. Both agricultural and natural foods were detected, indicating a relatively broad dietary niche. Spatiotemporal dietary changes were discovered, revealing diet differences among wintering sites and a general shift toward lower plant diversity later in winter. For the nonmigratory population, we detected a significantly more diverse array of plant species in their diet. We hypothesize that dietary variation between resident and migratory populations could be involved in the recent transition to partial migration in this species, although climate change can not be excluded. Collectively, these results support protecting unharvested grain fields and naturally unplowed lands to help conserve and promote population growth of Asian Great Bustard.
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Affiliation(s)
- Gang Liu
- Research Institute of WetlandBeijing Key Laboratory of Wetland Services and RestorationChinese Academy of ForestryBeijingChina
| | - Aaron B. A. Shafer
- Forensics & Environmental and Life SciencesTrent UniversityPeterboroughONCanada
| | - Xiaolong Hu
- College of Nature ConservationBeijing Forestry UniversityBeijingChina
| | - Linhai Li
- State Forestry Planning and Design Institute of Forest Products IndustryBeijingChina
| | - Yu Ning
- Research Institute of WetlandBeijing Key Laboratory of Wetland Services and RestorationChinese Academy of ForestryBeijingChina
| | - Minghao Gong
- Research Institute of WetlandBeijing Key Laboratory of Wetland Services and RestorationChinese Academy of ForestryBeijingChina
| | - Lijuan Cui
- Research Institute of WetlandBeijing Key Laboratory of Wetland Services and RestorationChinese Academy of ForestryBeijingChina
| | - Huixin Li
- Research Institute of WetlandBeijing Key Laboratory of Wetland Services and RestorationChinese Academy of ForestryBeijingChina
| | - Defu Hu
- College of Nature ConservationBeijing Forestry UniversityBeijingChina
| | - Lei Qi
- College of Nature ConservationBeijing Forestry UniversityBeijingChina
| | - Hengjiu Tian
- Beijing Wildlife Rescue and RehabilitationBeijingChina
| | - Bojun Wang
- Beijing Wildlife Rescue and RehabilitationBeijingChina
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9
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Osváth G, Daubner T, Dyke G, Fuisz TI, Nord A, Pénzes J, Vargancsik D, Vágási CI, Vincze O, Pap PL. How feathered are birds? Environment predicts both the mass and density of body feathers. Funct Ecol 2017. [DOI: 10.1111/1365-2435.13019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Gergely Osváth
- Evolutionary Ecology GroupHungarian Department of Biology and EcologyBabeş‐Bolyai University Cluj Napoca Romania
- Museum of ZoologyBabeş‐Bolyai University Cluj Napoca Romania
- Behavioural Ecology Research GroupDepartment of Evolutionary Zoology and Human BiologyUniversity of Debrecen Debrecen Hungary
| | - Timea Daubner
- Evolutionary Ecology GroupHungarian Department of Biology and EcologyBabeş‐Bolyai University Cluj Napoca Romania
| | - Gareth Dyke
- Behavioural Ecology Research GroupDepartment of Evolutionary Zoology and Human BiologyUniversity of Debrecen Debrecen Hungary
- Department of GeologyBabeş‐Bolyai University Cluj Napoca Romania
| | | | - Andreas Nord
- Department of Arctic and Marine BiologyArctic Animal PhysiologyUniversity of Tromsø Tromsø Norway
- Department of BiologySection for Evolutionary EcologyLund University Lund Sweden
| | - Janka Pénzes
- Evolutionary Ecology GroupHungarian Department of Biology and EcologyBabeş‐Bolyai University Cluj Napoca Romania
| | - Dorottya Vargancsik
- Evolutionary Ecology GroupHungarian Department of Biology and EcologyBabeş‐Bolyai University Cluj Napoca Romania
| | - Csongor I. Vágási
- Evolutionary Ecology GroupHungarian Department of Biology and EcologyBabeş‐Bolyai University Cluj Napoca Romania
- Behavioural Ecology Research GroupDepartment of Evolutionary Zoology and Human BiologyUniversity of Debrecen Debrecen Hungary
| | - Orsolya Vincze
- Evolutionary Ecology GroupHungarian Department of Biology and EcologyBabeş‐Bolyai University Cluj Napoca Romania
- Behavioural Ecology Research GroupDepartment of Evolutionary Zoology and Human BiologyUniversity of Debrecen Debrecen Hungary
| | - Péter L. Pap
- Evolutionary Ecology GroupHungarian Department of Biology and EcologyBabeş‐Bolyai University Cluj Napoca Romania
- Behavioural Ecology Research GroupDepartment of Evolutionary Zoology and Human BiologyUniversity of Debrecen Debrecen Hungary
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10
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Wolfe JD, Ralph CJ, Wiegardt A. Bottom-up processes influence the demography and life-cycle phenology of Hawaiian bird communities. Ecology 2017; 98:2885-2894. [PMID: 28779523 DOI: 10.1002/ecy.1981] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 07/20/2017] [Accepted: 07/28/2017] [Indexed: 11/08/2022]
Abstract
Changes in climate can indirectly regulate populations at higher trophic levels by influencing the availability of food resources in the lower reaches of the food web. As such, species that rely on fruit and nectar food resources may be particularly sensitive to these bottom-up perturbations due to the strength of their trophic linkages with climatically-influenced plants. To measure the influence of climatically-mediated, bottom-up processes, we used climate, bird capture, bird count, and plant phenology data from the Big Island of Hawaii to construct a series of structural equation and abundance models. Our results suggest that fruit and nectar-eating birds arrange life cycle events around climatically-influenced food resources, while some of these same food resources also influence seasonal patterns of abundance. This trend was particularly strong for two native nectarivores, 'I'iwi and 'Apapane, where we found that the dissimilar timing of molting and breeding activity was associated with peak abundance of the two most common flowers at our study site which, in turn, were each driven by dissimilar climatic cues. Given the rapidly changing Hawaiian climate, we suggest that determining behavioral plasticity, or evolutionary capacity of birds to mitigate changes in climatically-influenced food resources, should be recognized as a future research priority.
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Affiliation(s)
- Jared D Wolfe
- U.S.D.A Forest Service, Pacific Southwest Research Station, Arcata, California, 95521, USA.,Wildlife Department, Humboldt State University, Arcata, California, 95521, USA.,Klamath Bird Observatory, Ashland, Oregon, 97520, USA
| | - C John Ralph
- U.S.D.A Forest Service, Pacific Southwest Research Station, Arcata, California, 95521, USA.,Klamath Bird Observatory, Ashland, Oregon, 97520, USA
| | - Andrew Wiegardt
- U.S.D.A Forest Service, Pacific Southwest Research Station, Arcata, California, 95521, USA.,Wildlife Department, Humboldt State University, Arcata, California, 95521, USA
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11
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Pap PL, Vincze O, Wekerle B, Daubner T, Vágási CI, Nudds RL, Dyke GJ, Osváth G. A phylogenetic comparative analysis reveals correlations between body feather structure and habitat. Funct Ecol 2017. [DOI: 10.1111/1365-2435.12820] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Péter L. Pap
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 RO‐400006 Cluj Napoca Romania
- MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 H‐4032 Debrecen Hungary
| | - Orsolya Vincze
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 RO‐400006 Cluj Napoca Romania
- MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 H‐4032 Debrecen Hungary
| | - Beatrix Wekerle
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 RO‐400006 Cluj Napoca Romania
| | - Timea Daubner
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 RO‐400006 Cluj Napoca Romania
| | - Csongor I. Vágási
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 RO‐400006 Cluj Napoca Romania
- MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 H‐4032 Debrecen Hungary
| | - Robert L. Nudds
- Faculty of Life Sciences University of Manchester ManchesterM13 9PT UK
| | - Gareth J. Dyke
- MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 H‐4032 Debrecen Hungary
| | - Gergely Osváth
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 RO‐400006 Cluj Napoca Romania
- MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 H‐4032 Debrecen Hungary
- Museum of Zoology Babeş‐Bolyai University Clinicilor Street 5–7 RO‐400006 Cluj Napoca Romania
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12
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Guallar S, Figuerola J. Factors influencing the evolution of moult in the non-breeding season: insights from the family Motacillidae. Biol J Linn Soc Lond 2016. [DOI: 10.1111/bij.12784] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jordi Figuerola
- Department of Wetland Ecology; Estación Biológica de Doñana; CSIC; Avda. Américo Vespucio, s/n 41092 Sevilla Spain
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13
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Pap PL, Osváth G, Sándor K, Vincze O, Bărbos L, Marton A, Nudds RL, Vágási CI. Interspecific variation in the structural properties of flight feathers in birds indicates adaptation to flight requirements and habitat. Funct Ecol 2015. [DOI: 10.1111/1365-2435.12419] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Péter L. Pap
- MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 Debrecen H–4032 Hungary
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
| | - Gergely Osváth
- Museum of Zoology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
| | - Krisztina Sándor
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
| | - Orsolya Vincze
- MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 Debrecen H–4032 Hungary
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
| | - Lőrinc Bărbos
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
- ‘Milvus Group’ Bird and Nature Protection Association Márton Áron street 9/BTîrgu Mureş RO–540058 Romania
| | - Attila Marton
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
- ‘Milvus Group’ Bird and Nature Protection Association Márton Áron street 9/BTîrgu Mureş RO–540058 Romania
| | - Robert L. Nudds
- Faculty of Life Sciences University of Manchester Manchester M13 9PT UK
| | - Csongor I. Vágási
- MTA‐DE “Lendület” Behavioural Ecology Research Group Department of Evolutionary Zoology and Human Biology University of Debrecen Egyetem tér 1 Debrecen H–4032 Hungary
- Evolutionary Ecology Group Hungarian Department of Biology and Ecology Babeş‐Bolyai University Clinicilor Street 5–7 Cluj Napoca RO–400006 Romania
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Cristol DA, Johnson KM, Jenkins KD, Hawley DM. Timing of feather molt related to date of spring migration in male white-throated sparrows, Zonotrichia albicollis. ACTA ACUST UNITED AC 2014; 321:586-94. [PMID: 25287905 DOI: 10.1002/jez.1899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 09/10/2014] [Accepted: 09/11/2014] [Indexed: 11/11/2022]
Abstract
In migratory birds, the ability to depart wintering grounds at the appropriate time is an important determinant of fitness. Understanding the regulation of this timing will be essential for predicting whether timing of bird migration keeps up with global climate change. We examined whether the timing of the late-winter molt, in which white-throated sparrows (Zonotrichia albicollis) replace head and body feathers in advance of mating, may constrain the timing of northward migratory departure. In an observational study, we found a significant correlation between timing of molt and the date on which free-living male white-throated sparrows disappeared from our study site during migration. The following year, we tested whether experimentally manipulating molt date by advancing photoperiod during temporary captivity would subsequently advance disappearance date once the birds were released. Sparrows that were experimentally induced to molt early disappeared from the wintering site before controls. However, the captive control birds also molted and disappeared from the site earlier than free-living controls, suggesting that the diet during captivity had played a role. In the third winter we completed the study by advancing or delaying molt using only dietary manipulation. Together, these results show that the ability to molt early in spring is related to early disappearance from the wintering site. Early molt likely has carry-over effects on reproduction and the requirements of molt may prevent populations from adjusting migration timing in response to global climate change.
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Affiliation(s)
- Daniel Aaron Cristol
- Institute for Integrative Bird Behavior Studies, Department of Biology, The College of William and Mary, Williamsburg, Virginia
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