Article
Ecology
Clarissa R. Teixeira, Silvina Botta, Marta J. Cremer, Milton C. C. Marcondes, Luiza B. Pereira, Seth D. Newsome, Fabio G. Daura Jorge, Paulo C. Simoes-Lopes
Summary: This study found that some individuals within populations of Guiana dolphins exhibit specialized feeding behavior, despite being considered generalists. The specific feeding habits are influenced by environmental factors and population characteristics.
Article
Multidisciplinary Sciences
Ian Silver-Gorges, Simona A. Ceriani, Mariana M. P. B. Fuentes
Summary: This study demonstrates that loggerhead sea turtles partition their realized ecological niche by lifestages, potentially along both bionomic and scenopoetic axes. The analysis of stable isotopes from different tissues provides insights into intraspecific niche partitioning and has implications for conservation efforts for loggerhead turtles and other imperiled marine species.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Ecology
Alex Salas-Lopez, Cyrille Violle, Francois Munoz, Florian Menzel, Jerome Orivel
Summary: This study investigated the resource-based ant community structure in a tropical ecosystem. The findings suggest that competition for resources and habitat filtering have significant effects on the composition of local ant assemblages, with niche partitioning and niche filtering playing important roles.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Multidisciplinary Sciences
Sara C. Bellefontaine, Diana J. Hamilton
Summary: Animal populations use environmental heterogeneity to divide themselves into microhabitat niches, which play a crucial role in regulating competition and community structure. This study examined niche partitioning by shorebirds on the Northumberland Strait in Canada to understand how small coastal staging sites support diverse shorebird populations. The research found evidence of partitioning in terms of space, foraging behavior, and diet, with most species specializing in at least one dimension. The findings highlight the importance of conserving small coastal sites to support migratory shorebirds in Atlantic Canada.
Article
Ecology
Carrie C. Veilleux, Shoji Kawamura, Michael J. Montague, Tomohide Hiwatashi, Yuka Matsushita, Eduardo Fernandez-Duque, Andres Link, Anthony Di Fiore, Donald Max Snodderly
Summary: Genetic variation in color vision was examined in five primate species in the Yasuni Biosphere Reserve in Ecuador, revealing differences in allele frequencies among species, suggesting that interspecific competition may influence the distribution of opsin alleles.
ECOLOGY AND EVOLUTION
(2021)
Article
Ecology
Chaim J. J. Lasmar, Tom R. R. Bishop, Catherine L. L. Parr, Antonio C. M. Queiroz, Icaro Wilker, Rodrigo M. M. Feitosa, Fernando A. A. Schmidt, Carla R. R. Ribas
Summary: Animals integrate into the wider ecosystem by foraging and behavior, targeting scarce and atypical nutrients according to the compensation hypothesis. This study investigated the variation in resource use by ants across habitat strata and trophic levels in Neotropical biomes. The results showed consistent patterns of sugar and lipid preferences across biomes and trophic levels, indicating sugar limitation in the arboreal stratum and lipid limitation on the ground. However, there was no consistent pattern for amino acid and sodium preferences. Overall, the study suggests strong local niche partitioning of sugar and lipid use and the influence of large-scale processes on amino acid and sodium dynamics.
Article
Ecology
Nicholas J. Balfour, Kyle Shackleton, Natalie A. Arscott, Kimberley Roll-Baldwin, Anthony Bracuti, Gioelle Toselli, Francis L. W. Ratnieks
Summary: Revitalizing our understanding of species distributions and assembly in community ecology requires greater use of functional approaches based on quantifiable factors such as energetics. The study on niche partitioning between bumble and honey bees emphasized the importance of energetics in understanding community ecology and bee foraging niche, highlighting the energetic balance maintained by foraging bees.
Article
Ecology
Devin L. Johnson, Michael T. Henderson, David L. Anderson, Travis L. Booms, Cory T. Williams
Summary: Intra- and inter-specific resource partitioning is a fundamental component of trophic ecology, and individual niche variation is one mechanism for achieving this partitioning. The Niche Variation Hypothesis predicts that inter-individual trait variation leads to functional trade-offs in foraging efficiency, resulting in populations composed of individual dietary specialists. Our study on an Arctic raptor guild found a high degree of niche overlap between three species, with gyrfalcons displaying a positive relationship between individual specialization and population niche width.
Article
Behavioral Sciences
Pablo Meza, Damian O. Elias, Malcolm F. Rosenthal
Summary: Our study on Schizocosa floridana reveals that despite sand being the least used substrate in the wild, it has the highest prey capture rates. We also did not find conclusive evidence that either visual or vibratory sensory modalities are essential for prey capture. Our results suggest that strict habitat specialization can be beneficial in certain ecological contexts but costly in others.
Article
Biodiversity Conservation
Alivereti N. Naikatini, Gunnar Keppel, Gilianne Brodie, Sonia Kleindorfer
Summary: This study explores the interspecific foraging behavior overlap in Fiji's forest birds and finds evidence of vertical stratification of foraging behavior. The results support the significance of interspecific competition and niche divergence for patterns of ecological speciation on islands.
Article
Biology
Ana M. Valenzuela-Toro, Rita Mehta, Nicholas D. Pyenson, Daniel P. Costa, Paul L. Koch
Summary: Body size and feeding morphology play a crucial role in how animals organize themselves within communities. In this study, we investigated the relationships between sex, body size, skull morphology, and foraging behavior in sympatric otariids from the eastern North Pacific Ocean. We found significant differences in size, skull morphology, and foraging behavior among species and sexes, with sea lions showing higher foraging values than fur seals, and males having higher values than females. Additionally, there was a community-wide correlation between skull length and foraging, indicating a preference for nearshore habitats and higher trophic level prey among larger individuals.
Article
Behavioral Sciences
Rachel E. Williamson, Shasta E. Webb, Colin Dubreuil, Ronald Lopez, Saul Cheves Hernandez, Linda M. Fedigan, Amanda D. Melin
Summary: This study investigated niche differentiation in foraging behavior of wild white-faced capuchin monkeys in Costa Rica, revealing significant variation in habitat use across age and sex classes. These differences likely reduce intraspecific competition by promoting differential diet and habitat use. The findings highlight the role of niche differentiation in competition reduction and shed light on evolution of fission-fusion dynamics in highly frugivorous species.
Review
Ecology
Matthew C. Hutchinson, Andrew P. Dobson, Robert M. Pringle
Summary: The structure of vertebrate diets show strong generality in following a hollow-curve shape, with most populations being surprisingly specialised and dependent on only a few foods for at least half of their diet. Variation in dietary generalisation is influenced by factors such as consumer type, body mass, and latitude. Challenges ahead include understanding the mechanisms behind the hollow-curve DAD, its generality beyond vertebrates, and the biological determinants of dietary generalisation.
Article
Multidisciplinary Sciences
Jeffrey A. Brown, Julie L. Lockwood, Max R. Piana, Caroline Beardsley
Summary: While previous studies have focused on the negative effects of light pollution on arthropods, this research examines the impact on community-level responses. Through using different lighting and traps, the study found that artificial nighttime lighting caused shifts in the presence and abundance of predators, scavengers, parasites, and herbivores. These trophic shifts occurred immediately upon the introduction of artificial light and were limited to nocturnal communities, with levels reverting to their pre-light state after the removal of light.
Article
Ecology
Annette L. Fayet, Gemma V. Clucas, Tycho Anker-Nilssen, Martyna Syposz, Erpur S. Hansen
Summary: By studying seabird populations in the north-east Atlantic, the research identified possible reasons and mechanisms leading to population declines, indicating that low prey availability near breeding sites and intraspecific competition may force breeding adults to forage far away, resulting in greater costs and risks.
JOURNAL OF ANIMAL ECOLOGY
(2021)
Article
Biodiversity Conservation
Fasheng Zou, Harrison Jones, Gabriel J. Z. Colorado, Demeng Jiang, Tien-Ming Lee, Ari Martinez, Kathryn Sieving, Min Zhang, Qiang Zhang, Eben Goodale
BIOLOGICAL CONSERVATION
(2018)
Article
Ecology
Harrison H. Jones, Kathryn E. Sieving
ECOLOGY AND EVOLUTION
(2019)
Article
Biology
Eben Goodale, Hari Sridhar, Kathryn E. Sieving, Priti Bangal, Gabriel J. Colorado Z., Damien R. Farine, Eckhard W. Heymann, Harrison H. Jones, Indrikis Krams, Ari E. Martinez, Flavia Montano-Centellas, Jenny Munoz, Umesh Srinivasan, Anne Theo, Kartik Shanker
BIOLOGICAL REVIEWS
(2020)
Article
Ornithology
Harrison H. Jones, Scott K. Robinson
Article
Ornithology
Flavia A. Montano-Centellas, Harrison H. Jones
Summary: This study investigated the elevational patterns of flock diversity in the Bolivian Andes. The results supported the open-membership hypothesis, showing that Andean flocks were dynamic and unstructured aggregations. At around 2,300 meters elevation, there was a peak in flock species richness, size, and Shannon's diversity.
Article
Ornithology
Harrison H. Jones, Gabriel Colorado Z, Scott K. Robinson
Summary: The study found that fragmentation and selective logging have different effects on the body condition of different species of tropical understory birds, mainly through changing vegetation structure and food resources. Some bird species have better body condition under logging-induced vegetation disturbance, while some insectivores have poorer body condition with loss of vegetation structure.
ORNITHOLOGICAL APPLICATIONS
(2022)
Article
Ecology
Elena H. West, Harrison H. Jones
Summary: This study examined the isotopic niche width of Steller's Jays across different human land-use categories and found that individual foraging behavior and habitat use were better predictors of diet variation than sex or social dominance. The availability of human food subsidies also increased the degree of individual specialization exhibited by the jays.
Article
Biodiversity Conservation
M. J. Bedoya-Duran, H. H. Jones, K. M. Malone, L. C. Branch
Summary: The number and composition of birds and mammals in shade coffee landscapes in the Western Andes of Colombia differ from those in continuous forest, lacking certain species such as large-bodied, insectivorous birds and forest-specialist and large-bodied mammals. The richness of species in forest fragments is closer to that in shade coffee but differs significantly in species composition. The distance from continuous forest is the most important predictor for occupancy, suggesting that conserving higher elevation tropical montane forest is crucial for biodiversity conservation in shade coffee landscapes.
ANIMAL CONSERVATION
(2023)
Article
Biology
Flavia A. Montano-Centellas, Jenny Munoz, Gabriela Giselle Mangini, Ian J. Ausprey, Felicity L. Newell, Harrison H. Jones, M. Elisa Fanjul, Boris A. Tinoco, Gabriel J. Colorado, Jennifer R. A. Cahill, E. Arbelaez-Cortes, Oscar H. Marin-Gomez, Pedro X. Astudillo, Esteban A. Guevara, Silvina Ippi, Molly E. McDermott, Amanda D. Rodewald, Erik Matthysen, Scott K. Robinson
Summary: Birds in mixed-species flocks experience both benefits and costs. The structure of these flocks varies with elevation, latitude, forest cover, and human disturbance. This study found that Andean flocks are overall unstructured, but become more connected and less modular at higher elevations. Higher forest cover leads to less cohesion and more defined flock subtypes. The unstructured nature of Andean flocks may be an adaptation to harsh environmental conditions.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Biodiversity Conservation
Harrison H. Jones, Maria Juliana Bedoya-Duran, Z. Gabriel J. J. Colorado, Gustavo Londono, Scott K. Robinson
Summary: The fragmentation of tropical forests has a significant impact on avian biodiversity loss, especially insectivores. In this study, the researchers investigated the mechanisms underlying area sensitivity in a cloud forest bird community. They found that specialized diets, use of canopy and subcanopy habitats, larger eye sizes, and larger clutch sizes were correlated with higher area sensitivity.
BIODIVERSITY AND CONSERVATION
(2023)
Article
Behavioral Sciences
Harrison H. Jones, Scott K. Robinson
Summary: The study shows that forest fragmentation, which leads to species loss and spatial turnover in mixed-species flocks, does not change the interaction patterns within the flocks. Network analysis reveals that cohesion is not affected by patch size and edge density, but increases with canopy height. Additionally, species turnover is the main driver of network dissimilarity.
BEHAVIORAL ECOLOGY
(2021)