Dr Andreanna Welch's Outputs (31)

Reassessing niche partitioning in MacArthur’s warblers: foraging behaviour, morphology and diet differentiation in a phylogenetic context (2025)
Journal Article
Miller, E. T., Wood, A. W., Baiz, M., Welch, A. J., Fleischer, R. C., Dale, A. S., & Toews, D. P. L. (2025). Reassessing niche partitioning in MacArthur’s warblers: foraging behaviour, morphology and diet differentiation in a phylogenetic context. Biology Letters, 21(4), Article 20250001. https://doi.org/10.1098/rsbl.2025.0001

Owing in large part to Robert MacArthur’s classic research, wood warblers in the family Parulidae are textbook exemplars of species competition and niche partitioning. Conventional wisdom suggests that subtle differences in foraging behaviour are the... Read More about Reassessing niche partitioning in MacArthur’s warblers: foraging behaviour, morphology and diet differentiation in a phylogenetic context.

Postglacial Recolonization of the Southern Ocean by Elephant Seals Occurred From Multiple Glacial Refugia (2025)
Journal Article
Berg, A. A., Askew, M., Seersholm, F. V., Verry, A. J. F., Hoelzel, A. R., Welch, A., Greig, K., Walter, R., Knapp, M., Barlow, A., Paijmans, J. L. A., Waters, J. M., Bunce, M., McDonald, K., O'Connor, S., Hall, B., Koch, P. L., Baroni, C., Salvatore, M. C., Faulkner, P., …de Bruyn, M. (2025). Postglacial Recolonization of the Southern Ocean by Elephant Seals Occurred From Multiple Glacial Refugia. Global Change Biology, 31(3), Article e70101. https://doi.org/10.1111/gcb.70101

The Southern Ocean is warming more rapidly than other parts of our planet. How this region's endemic biodiversity will respond to such changes can be illuminated by studying past events through genetic analyses of time‐series data sets, including his... Read More about Postglacial Recolonization of the Southern Ocean by Elephant Seals Occurred From Multiple Glacial Refugia.

Moult is associated with higher diversity of food items in the diet of Common Bulbuls ( Pycnonotus barbatus ) in Cameroon (2025)
Journal Article
Jarrett, C., Nwaogu, C. J., Tchana, C. N., Kamkeng, M. F. M., Quiñones, A. L. S., Olguin‐Villa, M. C., Helm, B., Powell, L. L., & Welch, A. J. (online). Moult is associated with higher diversity of food items in the diet of Common Bulbuls ( Pycnonotus barbatus ) in Cameroon. Ibis: International Journal of Avian Science, https://doi.org/10.1111/ibi.13395

Moult is an essential part of birds' annual cycle, and requires sufficient intake of energy and nutrients, but we understand little about how such nutritional requirements are met by wild birds. Using faecal metabarcoding, we analysed the diet of mou... Read More about Moult is associated with higher diversity of food items in the diet of Common Bulbuls ( Pycnonotus barbatus ) in Cameroon.

The role of landscape context in shaping bat assemblages in African cacao plantations (2024)
Journal Article
Ferreira, D. F., Jarrett, C., Atagana, P. J., Welch, A. J., Powell, L. L., & Rebelo, H. (2024). The role of landscape context in shaping bat assemblages in African cacao plantations. Science of the Total Environment, 954, Article 176393. https://doi.org/10.1016/j.scitotenv.2024.176393

Cacao production is mostly concentrated in Africa, with this continent exporting an impressive 68.4 % of the world's cacao. The increasing demand for cacao from the Global North has already led to massive deforestation in Ghana and Ivory Coast and ca... Read More about The role of landscape context in shaping bat assemblages in African cacao plantations.

Keystone individuals – linking predator traits to community ecology (2024)
Journal Article
LaBarge, L. R., Krofel, M., Allen, M. L., Hill, R., Welch, A. J., & Allan, A. T. L. (2024). Keystone individuals – linking predator traits to community ecology. Trends in Ecology and Evolution, 39(11), 983-994. https://doi.org/10.1016/j.tree.2024.07.001

Individual behavioral plasticity enables animals to adjust to different scenarios. Yet, personality traits limit this flexibility, leading to consistent inter-individual differences in behavior. These individual behavioral traits have the potential t... Read More about Keystone individuals – linking predator traits to community ecology.

Museum genomics provide insight into the extinction of a specialist North American warbler species (2024)
Journal Article
Byerly, P. A., Kearns, A. M., Welch, A., Ochirbat, M.-E., Marra, P. P., Wilson, A., Campana, M. G., & Fleischer, R. C. (2024). Museum genomics provide insight into the extinction of a specialist North American warbler species. Scientific Reports, 14(1), Article 17047. https://doi.org/10.1038/s41598-024-67595-5

Museum genomics provide an opportunity to investigate population demographics of extinct species, especially valuable when research prior to extinction was minimal. The Bachman’s warbler (Vermivora bachmanii) is hypothesized to have gone extinct due... Read More about Museum genomics provide insight into the extinction of a specialist North American warbler species.

Pre-eradication updated seabird survey including new records on Amsterdam Island, southern Indian Ocean (2024)
Journal Article
Lesage, C., Cherel, Y., Delord, K., d’Orchymont, Q., Fretin, M., Levy, M., Welch, A., & Barbraud, C. (2024). Pre-eradication updated seabird survey including new records on Amsterdam Island, southern Indian Ocean. Polar Biology, 47, 1093–1105. https://doi.org/10.1007/s00300-024-03282-5

An invasive predator eradication campaign is planned for 2024 on Amsterdam Island, one of world’s top priority island for seabird conservation. In order to monitor the effects on seabird colonies post-eradication, a survey of burrow-nesting species a... Read More about Pre-eradication updated seabird survey including new records on Amsterdam Island, southern Indian Ocean.

Carotenoid skin ornaments as flexible indicators of male foraging behavior in a marine predator: Variation among Mexican colonies of brown booby ( Sula leucogaster ) (2024)
Journal Article
Michael, N. P., Torres, R., Welch, A. J., Felis, J., Adams, J., Bonillas-Monge, M. E., …Wiley, A. E. (2024). Carotenoid skin ornaments as flexible indicators of male foraging behavior in a marine predator: Variation among Mexican colonies of brown booby ( Sula leucogaster ). Marine Biology, 171(5), Article 118. https://doi.org/10.1007/s00227-024-04429-y

Carotenoid-dependent ornaments can reflect animals’ diet and foraging behaviors. However, this association should be spatially flexible and variable among populations to account for geographic variation in optimal foraging behaviors. We tested this h... Read More about Carotenoid skin ornaments as flexible indicators of male foraging behavior in a marine predator: Variation among Mexican colonies of brown booby ( Sula leucogaster ).

Ancient and modern DNA track temporal and spatial population dynamics in the European fallow deer since the Eemian interglacial (2024)
Journal Article
Baker, K. H., Gray, H. W. I., Lister, A. M., Spassov, N., Welch, A. J., Trantalidou, K., …Hoelzel, A. R. (2024). Ancient and modern DNA track temporal and spatial population dynamics in the European fallow deer since the Eemian interglacial. Scientific Reports, 14, Article 3015. https://doi.org/10.1038/s41598-023-48112-6

Anthropogenic factors have impacted the diversity and evolutionary trajectory of various species. This can be through factors such as pressure on population size or range, habitat fragmentation, or extensive manipulation and translocation. Here we us... Read More about Ancient and modern DNA track temporal and spatial population dynamics in the European fallow deer since the Eemian interglacial.

Fewer pests and more ecosystem service‐providing arthropods in shady African cocoa farms: Insights from a data integration study (2023)
Journal Article
Jarrett, C., Cyril, K., Haydon, D. T., Wandji, C. A., Ferreira, D. F., Welch, A. J., Powell, L. L., & Matthiopoulos, J. (2024). Fewer pests and more ecosystem service‐providing arthropods in shady African cocoa farms: Insights from a data integration study. Journal of Applied Ecology, 61(2), 304-315. https://doi.org/10.1111/1365-2664.14563

Agricultural intensification is leading to conversion of cocoa agroforestry towards monocultures across the tropics. In the context of cocoa agriculture, arthropods provide a range of ecosystem services and dis‐services. Arthropod pests (e.g., mirids... Read More about Fewer pests and more ecosystem service‐providing arthropods in shady African cocoa farms: Insights from a data integration study.

Not all farms are created equal: Shady African cocoa farms promote a richer bat fauna (2023)
Journal Article
Ferreira, D. F., Darling, A., Jarrett, C., Atagana, P. J., Sandjo, P. R., Taedoumg, H., …Powell, L. L. (2023). Not all farms are created equal: Shady African cocoa farms promote a richer bat fauna. Biological Conservation, 284, Article 110191. https://doi.org/10.1016/j.biocon.2023.110191

Bats provide important pest suppression services with economic value to cocoa farmers, yet the impact of cocoa farm management on bat diversity metrics is still poorly understood. This is especially important if we consider that Afrotropical cocoa fa... Read More about Not all farms are created equal: Shady African cocoa farms promote a richer bat fauna.

Widespread southern elephant seal occupation of the Victoria land coast implies a warmer-than-present Ross Sea in the mid-to-late Holocene (2023)
Journal Article
Hall, B. L., Koch, P. L., Baroni, C., Salvatore, M. C., Hoelzel, A. R., de Bruyn, M., & Welch, A. J. (2023). Widespread southern elephant seal occupation of the Victoria land coast implies a warmer-than-present Ross Sea in the mid-to-late Holocene. Quaternary Science Reviews, 303, Article 107991. https://doi.org/10.1016/j.quascirev.2023.107991

Prediction of future ice-sheet behavior in Antarctica and its contribution to sea-level rise depends on accurate understanding of ice-sheet response to a warm climate. Examination of how the ice sheet reacted to past warm episodes affords a means of... Read More about Widespread southern elephant seal occupation of the Victoria land coast implies a warmer-than-present Ross Sea in the mid-to-late Holocene.

Integration of mark-recapture and acoustic detections for unbiased population estimation in animal communities (2022)
Journal Article
Jarrett, C., Haydon, D. T., Morales, J. M., Ferreira, D. F., Alemanji Forzi, F., Welch, A. J., Powell, L. L., & Matthiopoulos, J. (2022). Integration of mark-recapture and acoustic detections for unbiased population estimation in animal communities. Ecology, 103(10), Article e3769. https://doi.org/10.1002/ecy.3769

Abundance estimation methods that combine several types of data are becoming increasingly common because they yield more accurate and precise parameter estimates and predictions than are possible from a single data source. These beneficial effects re... Read More about Integration of mark-recapture and acoustic detections for unbiased population estimation in animal communities.

Palaeoceanographic changes in the late Pliocene promoted rapid diversification in pelagic seabirds (2022)
Journal Article
Ferrer-Obiol, J., James, H., Chesser, R., Bretagnolle, V., González-Solís, J., Rozas, J., Welch, A., & Riutort, M. (2022). Palaeoceanographic changes in the late Pliocene promoted rapid diversification in pelagic seabirds. Journal of Biogeography, 49(1), 171-188. https://doi.org/10.1111/jbi.14291

Aim: Palaeoceanographic changes can act as drivers of diversification and speciation, even in highly mobile marine organisms. Shearwaters are a group of globally distributed and highly mobile pelagic seabirds. Despite a recent well resolved phylogeny... Read More about Palaeoceanographic changes in the late Pliocene promoted rapid diversification in pelagic seabirds.

Current Methods and Future Directions in Avian Diet Analysis (2021)
Journal Article
Hoenig, B., Snider, A., Forsman, A., Hobson, K., Latta, S., Miller, E., Polito, M., Powell, L., Rogers, S., Sherry, T., Toews, D., Welch, A., Taylor, S., & Porter, B. (2022). Current Methods and Future Directions in Avian Diet Analysis. Ornithology, 139(1), Article ukab077. https://doi.org/10.1093/ornithology/ukab077

Identifying the composition of avian diets is a critical step in characterizing the roles of birds within ecosystems. However, because birds are a diverse taxonomic group with equally diverse dietary habits, gaining an accurate and thorough understan... Read More about Current Methods and Future Directions in Avian Diet Analysis.

Bird communities in African cocoa agroforestry are diverse but lack specialized insectivores (2021)
Journal Article
Jarrett, C., Smith, T., Claire, T., Ferreira, D., Tchoumbou, M., Elikwo, M., Wolfe, J., Brezeski, K., Welch, A., Hanna, R., & Powell, L. (2021). Bird communities in African cocoa agroforestry are diverse but lack specialized insectivores. Journal of Applied Ecology, 58(6), 1237-1247. https://doi.org/10.1111/1365-2664.13864

Forests are being converted to agriculture throughout the Afrotropics, driving declines in sensitive rainforest taxa such as understorey birds. The ongoing expansion of cocoa agriculture, a common small‐scale farming commodity, has contributed to the... Read More about Bird communities in African cocoa agroforestry are diverse but lack specialized insectivores.

Integrating Sequence Capture and Restriction Site-Associated DNA Sequencing to resolve Recent Radiations of Pelagic Seabirds (2021)
Journal Article
Obiol, J. F., James, H. F., Chesser, R. T., Bretagnolle, V., González-Solís, J., Rozas, J., Riutort, M., & Welch, A. J. (2021). Integrating Sequence Capture and Restriction Site-Associated DNA Sequencing to resolve Recent Radiations of Pelagic Seabirds. Systematic Biology, 70(5), 976-996. https://doi.org/10.1093/sysbio/syaa101

The diversification of modern birds has been shaped by a number of radiations. Rapid diversification events make reconstructing the evolutionary relationships among taxa challenging due to the convoluted effects of incomplete lineage sorting (ILS) an... Read More about Integrating Sequence Capture and Restriction Site-Associated DNA Sequencing to resolve Recent Radiations of Pelagic Seabirds.

First record of a piebald Bates’s Slit-faced Bat, Nycteris arge (Chiroptera: Nycteridae) from Equatorial Guinea, Central Africa (2020)
Journal Article
Ferreira, D. F., Torrent, L., Welch, A. J., Wolfe, J. D., Brzeski, K., & Powell, L. L. (2020). First record of a piebald Bates’s Slit-faced Bat, Nycteris arge (Chiroptera: Nycteridae) from Equatorial Guinea, Central Africa. Barbastella (Alcalá de Henares), 13(1), 88-92. https://doi.org/10.14709/barbj.13.1.2020.14

Chromatic disorders may disrupt adaptive coloration and reduce animals’ capacity to survive and produce young. These disorders have been documented widely for bats across the globe. However, most of these cases are concentrated in regions with well-s... Read More about First record of a piebald Bates’s Slit-faced Bat, Nycteris arge (Chiroptera: Nycteridae) from Equatorial Guinea, Central Africa.

Bitter fruits of hard labour: Diet metabarcoding and telemetry reveal that urban songbirds travel further for lower-quality food (2020)
Journal Article
Jarrett, C., Powell, L., McDevitt, H., Helm, B., & Welch, A. (2020). Bitter fruits of hard labour: Diet metabarcoding and telemetry reveal that urban songbirds travel further for lower-quality food. Oecologia, 193(2), 377-388. https://doi.org/10.1007/s00442-020-04678-w

Rapidly increasing urbanisation requires mitigation against associated losses of biodiversity and species abundance. In urban-breeding birds, altered food availability for nestlings is thought to reduce reproductive success compared to forest populat... Read More about Bitter fruits of hard labour: Diet metabarcoding and telemetry reveal that urban songbirds travel further for lower-quality food.

Carotenoid-based skin ornaments reflect foraging propensity in a seabird, Sula leucogaster (2018)
Journal Article
Michael, N., Torres, R., Welch, A., Adams, J., Bonillas-Monge, M., Felis, J., Lopez-Marquez, L., Martínez-Flores, A., & Wiley, A. (2018). Carotenoid-based skin ornaments reflect foraging propensity in a seabird, Sula leucogaster. Biology Letters, 14(9), Article 20180398. https://doi.org/10.1098/rsbl.2018.0398

Carotenoid-based ornaments are common signalling features in animals. It has long been proposed that such ornaments communicate information about foraging abilities to potential mates. However, evidence linking foraging with ornamentation is largely... Read More about Carotenoid-based skin ornaments reflect foraging propensity in a seabird, Sula leucogaster.