A5033287348- Fish Ecology and Management Studies
- Isotope Analysis in Ecology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Wildlife Ecology and Conservation
- Marine and fisheries research
- Plant and animal studies
- Geology and Paleoclimatology Research
- Genetic diversity and population structure
- Aquatic Ecosystems and Biodiversity
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
- Evolution and Genetic Dynamics
- Soil and Water Nutrient Dynamics
- Animal Ecology and Behavior Studies
- Fish Biology and Ecology Studies
- Aquatic Invertebrate Ecology and Behavior
- Evolutionary Game Theory and Cooperation
- Hydrology and Sediment Transport Processes
- Ecology and Vegetation Dynamics Studies
- Marine Biology and Ecology Research
- Hydrology and Watershed Management Studies
- Avian ecology and behavior
- Physiological and biochemical adaptations
- Animal Behavior and Reproduction
- Environmental DNA in Biodiversity Studies
Yale University
2014-2023
Yale-NUS College
2022
Pennsylvania State University
2021
National Chengchi University
2021
Osaka University
2021
Western University
2021
University of Cape Town
2021
The University of Sydney
2021
Google (United States)
2011-2014
Connecticut Department of Energy and Environmental Protection
2009-2010
The stable isotopes of nitrogen (δ15N) and carbon (δ13C) provide powerful tools for estimating the trophic positions flow to consumers in food webs; however, isotopic signature a consumer alone is not generally sufficient infer position or source without an appropriate baseline. In this paper, I develop discuss methods generating baseline evaluate assumptions required estimate using multiple ecosystem studies. test ability two primary consumers, surface-grazing snails filter-feeding mussels,...
Stable isotope ratios (typically of carbon and nitrogen) provide one representation an organism's trophic niche are widely used to examine aspects food web structure. Yet stable isotopes have not been applied quantitatively characterize community-wide structure (i.e., at the level entire web). We propose quantitative metrics that can be this end, drawing on similar approaches from ecomorphology research. For example, convex hull area occupied by species in δ13C–δ15N space is a total extent...
Abstract Traditional approaches to the study of food webs emphasize transfer local primary productivity in form living plant organic matter across trophic levels. However, dead matter, or detritus, a common feature most ecosystems plays frequently overlooked role as dynamic heterogeneous resource and habitat for many species. We develop an integrative framework understanding impact detritus that emphasizes ontogeny heterogeneity various ways explicit inclusion detrital dynamics alters...
Global computer-based communications cut across territorial borders, creating a new realm of human activity and undermining the feasibility--and legitimacy--of applying laws based on geographic boundaries. While these electronic play havoc with boundaries, boundary, made up screens passwords that separate virtual world from real atoms, emerges. This boundary defines distinct Cyberspace needs can create law legal institutions its own. Territorially-based law-making law-enforcing authorities...
Interactions between natural selection and environmental change are well recognized sit at the core of ecology evolutionary biology. Reciprocal interactions evolution, eco-evolutionary feedbacks, less studied, even though they may be critical for understanding evolution biological diversity, structure communities function ecosystems. Eco-evolutionary feedbacks require that populations alter their environment (niche construction) those changes in feed back to influence subsequent population....
The stable isotopes of nitrogen (δ15N) and carbon (δ13C) provide powerful tools for estimating the trophic positions flow to consumers in food webs; however, isotopic signature a consumer alone is not generally sufficient infer position or source without an appropriate baseline. In this paper, I develop discuss methods generating baseline evaluate assumptions required estimate using multiple ecosystem studies. test ability two primary consumers, surface-grazing snails filter-feeding mussels,...
Intraspecific phenotypic variation in ecologically important traits is widespread and for evolutionary processes, but its effects on community ecosystem processes are poorly understood. We use life history differences among populations of alewives, Alosa pseudoharengus, to test the intraspecific a predator pelagic zooplankton structure strength cascading trophic interactions. focus (1) duration residence fresh water (either seasonal or year-round) (2) foraging morphology, both which may...
Significance Much research has focused on the influence of animal migrations terrestrial ecosystems. Mass drownings are an understudied phenomenon associated with that may have substantial impacts aquatic Here, we show mass wildebeest occur nearly annually during Serengeti migration, and these contribute equivalent biomass 10 blue whale carcasses per year to this moderately sized river. Soft tissues carcass decompose within several weeks assimilated by both in-stream consumers. Bones over...
Abstract Invasive species, and the ensuing homogenization of world's biota, form a global problem with consequences ranging from decline extirpation native species to threats human health. The magnitude this issue demands thorough understanding invasion process, which consists three main stages: initial dispersal, establishment self‐sustaining populations, spread. To assess relative distribution research effort among these stages, we conducted literature review using 873 articles published...
The transition to piscivory is a crucial ontogenetic niche shift for many primarily piscivorous fishes. An early may increase growth, decrease mortality, and therefore enhance lifetime fitness. Although much known about the extent causes of variation in timing among species cohorts within species, little switch individuals single cohort. Here, I link otolith age growth analysis direct diet stable isotope analyses examine its individual members 1994 largemouth bass cohort Paul Lake, Michigan....
Abstract We studied the selection response of freshwater grazing zooplankter, Daphnia galeata, to increased abundance cyanobacteria in its environment. Cyanobacteria are a poor-quality and often toxic food. Distinct genotypes D. galeata were hatched from diapausing eggs extracted three time horizons sediments Lake Constance, Europe, covering period 1962 1997, change both prevalence planktonic levels phosphorus pollution. assessed whether grazers evolved become more resistant dietary by...
Recent theoretical studies have shown the potential for chaotic dynamics in simple three-species food chains. Most of these focused on linear chains, although natural chains are seldom isolated from surrounding web. There is a growing awareness that web can be strongly influenced by behavior and movement predators, energy, nutrients across ecosystem subecosystem boundaries. Motivated observations lakes, where pelagic often linked to littoral mobile we constructed model evaluate two top...
Food chain length (FCL) is a fundamental component of food web structure. Studies in variety ecosystems suggest that FCL determined by energy supply, environmental stability, and/or ecosystem size, but the nature relationship between stability and FCL, mechanism linking size to remain unclear. Here we show increases with drainage area decreases hydrologic variability intermittency across 36 North American rivers. Our analysis further suggests underlying correlation Ecosystem lengthens river...
Studies of adaptive divergence have traditionally focused on the ecological causes trait diversification, while consequences phenotypic remain relatively unexplored. Divergence in predator foraging traits, particular, has potential to impact structure and dynamics communities. To examine effects prey communities, we exposed zooplankton communities lake mesocosms predation from either anadromous or landlocked (freshwater resident) alewives, which undergone recent rapid differentiation traits...
Food‐chain length is a central characteristic of ecological communities because its strong influence on community structure and ecosystem function. While recent studies have started to better clarify the relationship between food‐chain environmental gradients such as resource availability size, much less progress has been made in isolating ultimate proximate mechanisms that determine length. Progress slow, part, research paid little attention changes food web must link variation dynamic...
Summary Hippopotami can play a significant role as ecosystem engineers and may an important carbon nutrient vectors from savanna grasslands to aquatic systems. We coupled the results of feeding study captive hippopotami, faeces leaching/mineralisation experiments, hippopotamus consumption estimates stoichiometry grasses calculate excretion egestion rates hippopotami. then used time budgets population loading by hippopotami in Mara River, Kenya. In captivity, consumed 11.0 g dry matter (DM)...
Abstract Understanding the factors that affect water quality and ecological services provided by freshwater ecosystems is an urgent global environmental issue. Predicting how will respond to changes not only requires data, but also information about context of individual bodies across broad spatial extents. Because lake usually sampled in limited geographic regions, often for time periods, assessing controls compilation many data sets regions into integrated database. LAGOS-NE accomplishes...