7 Works

Do cogovernance and CSOs supplement municipal capacity for service delivery? An assessment of differences in simple versus complex services

Renzo De La Riva Agüero
Municipal governments in the Global South vary in their ability to provide not only complex social services, like environmentally proper solid waste disposal, but even simple services, like trash collection from the streets. This paper examines whether variation in service provision outcomes is associated with service-specific municipal administrative capacity, locally embedded civil society organization (CSO) presence, and collaborative governance for local planning and budgeting (or cogovernance). Using a panel dataset of Peruvian municipalities, I find...

Secondary sexual trait melanization in black scavenger flies: nutritional plasticity and its evolution

Patrick T. Rohner
The black scavenger fly Sepsis thoracica exhibits polyphenic development resulting in alternate small black and large amber male morphs. Although the behavior, ecology, and physiology of both morphs are being scrutinized, the evolutionary origins of the nutritional polyphenism remain poorly understood. I here use a comparative approach to study variation in the degree of melanization of the forefemur —a secondary sexual trait. Melanization showed nutritional plasticity in all species and character mapping suggests polyphenic development...

The telomere regulatory gene POT1 responds to stress and predicts performance in nature: implications for telomeres and life history evolution

Sarah Wolf, Tiana Sanders, Sol Beltran & Kimberly Rosvall
Telomeres are emerging as correlates of fitness-related traits and may be important mediators of ecologically relevant variation in life history strategies. Growing evidence suggests that telomere dynamics can be more predictive of performance than length itself, but very little work considers how telomere regulatory mechanisms respond to environmental challenges or influence performance in nature. Here, we combine observational and experimental datasets from free-living tree swallows (Tachycineta bicolor) to assess how performance is predicted by the...

Variation in the location and timing of experimental severing demonstrates that the persistent rhizome serves multiple functions in a clonal forest understory herb

Katherine Eisen, Gregor-Fausto Siegmund, Maxine Watson & Monica Geber
1. In clonal plants, persistent rhizomes can serve multiple purposes, including resource storage, modulation of heterogenous resource distributions, maintenance of bud banks and promotion of recovery from disturbance. Clonal plants are commonly long-lived and, in temperate zones, often exhibit organ preformation. Thus, investigations of how the timing of disturbance to the rhizome affects plant performance must occur over multiple growing seasons, but these types of studies are rare. 2. We conducted a field experiment to...

Extirpated prairie species demonstrate more variable phenological responses to warming than extant congeners

Meredith Zettlemoyer, Katarina Renaldi, Michael Muzyka & Jennifer Lau
Premise of the study. Shifting phenology in response to climate is one mechanism that can promote population persistence and geographic spread; therefore, species with limited ability to phenologically track changing environmental conditions may be more susceptible to population declines. Alternatively, apparently, nonresponding species may demonstrate divergent responses to multiple environmental conditions experienced across seasons. Methods. Capitalizing on herbarium records from across the Midwestern United States and detailed botanical surveys documenting local extinctions over the past...

Data from: Virulent disease epidemics can increase host density by depressing foraging of hosts

Rachel Penczykowski, Marta Shocket, Jessica Housley Ochs, Brian Lemanski, Hema Sundar, Meghan Duffy & Spencer Hall
All else equal, parasites that harm host fitness should depress densities of their hosts. However, parasites that alter host traits may increase host density via indirect ecological interactions. Here, we show how depression of foraging rate of infected hosts can produce such a hydra effect. Using a foraging assay, we quantified reduced foraging rates of a zooplankton host infected with a virulent fungal parasite. We then parameterized a dynamical model of hosts, parasites, and resources...

Evolutionary and plastic variation in larval growth and digestion reveal the complex underpinnings of size and age at maturation in dung beetles

Patrick T. Rohner & Armin Moczek
Age and size at maturity are key life history components, yet the proximate underpinnings that mediate intra- and interspecific variation in life history remain poorly understood. We studied the proximate underpinnings of species differences and nutritionally plastic variation in adult size and development time in four species of dung beetles. Specifically, we investigated how variation in insect growth mediates adult size variation, tested whether fast juvenile growth trades-off with developmental stability in adult morphology, and...

Registration Year

  • 2021
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Affiliations

  • Indiana University Bloomington
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  • Georgia Institute of Technology
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