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Articles 1 - 6 of 6
Full-Text Articles in Ecology and Evolutionary Biology
Perilous Choices: Landscapes Of Fear For Adult Birds Reduces Nestling Condition Across An Urban Gradient, Aaron M. Grade, Susannah B. Lerman, Paige S. Warren
Perilous Choices: Landscapes Of Fear For Adult Birds Reduces Nestling Condition Across An Urban Gradient, Aaron M. Grade, Susannah B. Lerman, Paige S. Warren
Environmental Conservation Faculty Publication Series
Predator fear effects influence reproductive outcomes in many species. In non-urban systems, passerines often respond to predator cues by reducing parental investment, resulting in smaller and lighter nestlings. Since trophic interactions in urban areas are highly altered, it is unclear how passerines respond to fear effects in human-altered landscapes. Nestlings of passerines in urban areas also tend to be smaller and lighter than their rural counterparts and are often exposed to high densities of potential predators yet experience lower per capita predation-the predation paradox. We suggest fear effects in urban habitats could be a significant mechanism influencing nestling condition in …
Large-Scale Patterns Of Green Turtle Trophic Ecology In The Eastern Pacific Oceans, Jeffery A. Seminoff, Lisa M. Komoroske, Diego Amorocho, Randall Arauz, Didiher Chacón-Chaverrí, Nelly De Paz, Peter H. Dutton, Miguel Donoso, Maike Heidemeyer, Gabriel Hoeffer
Large-Scale Patterns Of Green Turtle Trophic Ecology In The Eastern Pacific Oceans, Jeffery A. Seminoff, Lisa M. Komoroske, Diego Amorocho, Randall Arauz, Didiher Chacón-Chaverrí, Nelly De Paz, Peter H. Dutton, Miguel Donoso, Maike Heidemeyer, Gabriel Hoeffer
Environmental Conservation Faculty Publication Series
Trophic position and niche width are fundamental components of a species' ecology, reflecting resource use, and influencing key demographic parameters such as somatic growth, maturation, and survival. Concepts about a species' trophic niche space have important implications for local management and habitat protection, and can shed light about resilience to changing climate for species occurring over broad spatial scales. For elusive marine animals such as sea turtles, trophic niche is challenging to study, and researchers often rely on other metrics, such as isotopic niche, as a proxy. Here, stable isotope analysis (delta C-13 and delta N-15 values) was conducted on …
Annual Winter Water-Level Drawdowns Influence Physical Habitat Structure And Macrophytes In Massachusetts, Usa, Lakes, Jason R. Carmignani, Allison H. Roy
Annual Winter Water-Level Drawdowns Influence Physical Habitat Structure And Macrophytes In Massachusetts, Usa, Lakes, Jason R. Carmignani, Allison H. Roy
Environmental Conservation Faculty Publication Series
Annual wintertime water-level drawdowns are a common management strategy in recreational lakes; however, few studies have estimated their relative impact on lake littoral habitat among a set of typically co-occurring anthropogenic stressors including lakeshore development and herbicide application. Within 21 Massachusetts, USA lakes that represented a drawdown magnitude gradient (0.07-2.26 m), we assessed depth-specific littoral habitat (coarse wood, sediment, macrophytes) at two sites adjacent to forested or developed shorelines. Using generalized linear mixed models, we found coarse wood abundance and branching complexity was not correlated with drawdown magnitude but was primarily explained by the presence of lakeshore development. Drawdown magnitude …
The Value Of Considering Demographic Contributions To Connectivity: A Review, Joseph Drake, Xavier Lambin, Chris Sutherland
The Value Of Considering Demographic Contributions To Connectivity: A Review, Joseph Drake, Xavier Lambin, Chris Sutherland
Environmental Conservation Faculty Publication Series
Connectivity is a central concept in ecology, wildlife management, and conservation science. Understanding the role of connectivity in determining species persistence is increasingly important in the face of escalating anthropogenic impacts on climate and habitat. These connectivity augmenting processes can severely impact species distributions and community and ecosystem functioning. One general definition of connectivity is that it is an emergent process arising from a set of spatial interdependencies between individuals or populations, and increasingly realistic representations of connectivity are being sought. Generally, connectivity consists of a structural component, relating to the distribution of suitable and unsuitable habitat, and a functional …
The Motion Of Trees In The Wind: A Data Synthesis, Toby D. Jackson, Sarab Sethi, Ebba Dellwik, Nikolas Angelou, Amanda Bunce, Tim Van Emmerick, Marine Duperat, Jean-Claude Ruel, Axel Wellpott, Brian Kane
The Motion Of Trees In The Wind: A Data Synthesis, Toby D. Jackson, Sarab Sethi, Ebba Dellwik, Nikolas Angelou, Amanda Bunce, Tim Van Emmerick, Marine Duperat, Jean-Claude Ruel, Axel Wellpott, Brian Kane
Environmental Conservation Faculty Publication Series
Interactions between wind and trees control energy exchanges between the atmosphere and forest canopies. This energy exchange can lead to the widespread damage of trees, and wind is a key disturbance agent in many of the world's forests. However, most research on this topic has focused on conifer plantations, where risk management is economically important, rather than broadleaf forests, which dominate the forest carbon cycle. This study brings together tree motion time-series data to systematically evaluate the factors influencing tree responses to wind loading, including data from both broadleaf and coniferous trees in forests and open environments. We found that …
Hatching Date Influences Winter Habitat Occupancy: Examining Seasonal Interactions Across The Full Annual Cycle In A Migratory Songbird, Michael E. Akresh, David I. King, Peter P. Marra
Hatching Date Influences Winter Habitat Occupancy: Examining Seasonal Interactions Across The Full Annual Cycle In A Migratory Songbird, Michael E. Akresh, David I. King, Peter P. Marra
Environmental Conservation Faculty Publication Series
Birds experience a sequence of critical events during their life cycle, and past events can subsequently determine future performance via carry-over effects. Events during the non-breeding season may influence breeding season phenology or productivity. Less is understood about how events during the breeding season affect individuals subsequently in their life cycle. Using stable carbon isotopes, we examined carry-over effects throughout the annual cycle of prairie warblers (Setophaga discolor), a declining Nearctic-Neotropical migratory passerine bird. In drier winters, juvenile males that hatched earlier at our study site in Massachusetts, USA, occupied wetter, better-quality winter habitat in the Caribbean, as indicated by …