Intraspecific dietary variation in niche partitioning within a community of ecologically similar snakesMicah Perkins, Carl Cloyed & Perri Eason
Niche partitioning is an important mechanism for allowing ecologically similar species to coexist, contributing to biodiversity and the functioning of ecological communities. Species partition niches by taking advantage of environmental heterogeneity. However, niche partitioning and species coexistence investigations often do not include intraspecific variation or individual differences like sex and body size even though these factors can have important ecological consequences. Such intrapopulation factors can reduce the number of individuals among species that overlap in...
Tree death due to lightning influences tropical forest carbon cycling and tree community dynamics. However, the distribution of lightning damage among trees in forests remains poorly understood. We developed models to predict direct and secondary lightning damage to trees based on tree size, crown exposure, and local forest structure. We parameterized these models using data on the locations of lightning strikes and censuses of tree damage in strike zones, combined with drone-based maps of tree...
Parasite-host coevolution can lead to novel behavioural adaptations in hosts to resist parasitism. In avian obligate brood parasite and host systems, many hosts species have evolved diverse cognitive and behavioural traits to recognize and reject parasitic eggs. Our understanding of the evolution and ecology of these defences hinges on our understanding of the mechanisms that regulate them. We hypothesized that corticosterone, a hormone linked to the stress-response, vigilance, and the suppression of parental behaviour, stimulates...
Data from: Pantropical geography of lightning-caused disturbance and its implications for tropical forestsEvan Gora, Jeffrey Burchfield, Helene Muller-Landau, Phillip Bitzer & Stephen Yanoviak
Lightning is a major agent of disturbance, but its ecological effects in the tropics are unquantified. Here, we used ground and satellite sensors to quantify the geography of lightning strikes in terrestrial tropical ecosystems, and to evaluate whether spatial variation in lightning frequency is associated with variation in tropical forest structure and dynamics. Between 2013 and 2018, tropical terrestrial ecosystems received an average of 100.4 million lightning strikes per year, and the frequency of strikes...
Lightning is a major agent of disturbance in tropical terrestrial ecosystems, but its effects often are overlooked or misidentified in lowland forests. We used an unmanned aerial vehicle (i.e., drone) to locate 12 probable lightning strike sites in ca. 47 ha of forest in the Peruvian Amazon. Subsequent ground-based surveys of the 10 accessible sites revealed 7 that were unambiguously caused by lightning. The seven sites included 121 lightning-damaged trees, 45 of which were dead....
In shaping how individuals explore their environment and interact with others, personality may mediate both individual and social learning. Yet increasing evidence indicates that personality expression is contingent on social context, suggesting that group personality composition may be key in determining how individuals learn about their environment. Here, we used recovery latency following simulated predator attacks to identify Trinidadian guppies (Poecilia reticulata) that acted in a consistently bold or shy manner. We then employed network-based...
Lightning is a common agent of disturbance in many forest ecosystems. Lightning-damaged trees are a potentially important resource for beetles, but most evidence for this association is limited to temperate pine forests. Here, we evaluate the relationship between lightning damage and beetle colonization of tropical trees. We recorded the number of beetle holes on the trunks of trees from 10 strike sites (N = 173 lightning-damaged trees) and 10 matching control sites (N = 137...
By studying systems in their earliest stages of differentiation, we can learn about the evolutionary forces acting within and among populations and how those forces could contribute to reproductive isolation. Such an understanding would help us better discern and predict how selection leads to the maintenance of multiple morphs within a species, rather than speciation. The postglacial adaptive radiation of the threespine stickleback (Gasterosteus aculeatus) is one of the best-studied cases of evolutionary diversification and...
Data from: Spatial structure maintains diversity of pyocin inhibition in household Pseudomonas aeruginosaAubrey Mojesky & Susanna Remold
Nearly all bacteria produce narrow-spectrum antibiotics called bacteriocins. Studies have shown that bacteriocins can mediate microbial interactions, but the mechanisms underlying patterns of inhibition are less well understood. We assembled a spatially structured collection of isolates of Pseudomonas aeruginosa from bathroom and kitchen sink drains in nine households. Growth inhibition of these P. aeruginosa by bacteriocins, known as pyocins in this species, was measured using pairwise inhibition assays. Carbon source usage of these isolates was...
University of Louisville9
University of Alabama in Huntsville2
Smithsonian Tropical Research Institute2
Dauphin Island Sea Lab1
Duke University School of Medicine1
Owensboro Community and Technical College1
University of California Los Angeles1
University of Illinois at Urbana Champaign1
Royal Holloway University of London1
University of Denver1