21 Works

Data from: Organic matter and nutrient inputs from large wildlife influence ecosystem function in the Mara River, Africa

Amanda L. Subalusky, Christopher L. Dutton, Laban Njoroge, Emma J. Rosi & David M. Post
Animals can be important vectors for the movement of resources across ecosystem boundaries. Animals add resources to ecosystems primarily through egestion, excretion and carcasses, and the stoichiometry and bioavailability of these inputs likely interacts with characteristics of the recipient ecosystem to determine their effects on ecosystem function. We studied the influence of hippopotamus excretion/egestion and wildebeest carcasses, and their interactions with discharge, in the Mara River, Kenya. We measured nutrient dissolution and decomposition rates of...

Data from: Variation in coexisting birds to exploit spatial heterogeneity in small mammal activity

Quinn C. Emmering, Janice K. Kelly, Richard S. Ostfeld & Kenneth A. Schmidt
Breeding nest site selection is often the first defense against nest predation risk. To be effective, this mechanism requires site-specific spatial heterogeneity in predator abundance which produces predator-poor space, prey's ability to assess spatial heterogeneity in risk, and few or weak constraints on the ability to settle in within predator-poor space. We used a 15-year dataset on forested grids that provided extensive records of fledging success of veeries (Catharus fuscescens) and ovenbirds (Seiurus aurocapilla) in...

Data from: Host species composition influences infection severity among amphibians in the absence of spillover transmission

Barbara A. Han, Jacob L. Kerby, Catherine L. Searle, Andrew Storfer, Andy R. Blaustein & Andrew R. Blaustein
Wildlife epidemiological outcomes can depend strongly on the composition of an ecological community, particularly when multiple host species are affected by the same pathogen. However, the relationship between host species richness and disease risk can vary with community context and with the degree of spillover transmission that occurs among co-occurring host species. We examined the degree to which host species composition influences infection by Batrachochytrium dendrobatidis (Bd), a widespread fungal pathogen associated with amphibian population...

Data from: Occupancy models for data with false positive and false negative errors and heterogeneity across sites and surveys

Paige F. B. Ferguson, Michael J. Conroy, Jeffrey Hepinstall-Cymerman & Paige F.B. Ferguson
False positive detections, such as species misidentifications, occur in ecological data, although many models do not account for them. Consequently, these models are expected to generate biased inference. The main challenge in an analysis of data with false positives is to distinguish false positive and false negative processes while modeling realistic levels of heterogeneity in occupancy and detection probabilities without restrictive assumptions about parameter spaces. Building on previous attempts to account for false positive and...

Data from: Moving in the Anthropocene: global reductions in terrestrial mammalian movements

Marlee A. Tucker, Katrin Böhning-Gaese, William F. Fagan, John M. Fryxell, Bram Van Moorter, Susan C. Alberts, Abdullahi H. Ali, Andrew M. Allen, Nina Attias, Tal Avgar, Hattie Bartlam-Brooks, Buuveibaatar Bayarbaatar, Jerrold L. Belant, Alessandra Bertassoni, Dean Beyer, Laura Bidner, Floris M. Van Beest, Stephen Blake, Niels Blaum, Chloe Bracis, Danielle Brown, P. J. Nico De Bruyn, Francesca Cagnacci, Justin M. Calabrese, Constança Camilo-Alves … & Thomas Mueller
Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the extent of their movements in areas with a low human footprint. We attribute this reduction to behavioral...

Data from: Dissolved organic carbon modulates mercury concentrations in insect subsidies from streams to terrestrial consumers

Ramsa Chaves-Ulloa, Brad W. Taylor, Hannah J. Broadley, Kathryn L. Cottingham, Nicholas A. Baer, Kathleen C. Weathers, Holly A. Ewing & Celia Y. Chen
Mercury (Hg) concentrations in aquatic environments have increased globally, exposing consumers of aquatic organisms to high Hg levels. For both aquatic and terrestrial consumers, exposure to Hg depends on their food sources as well as environmental factors influencing Hg bioavailability. The majority of the research on the transfer of methylmercury (MeHg), a toxic and bioaccumulating form of Hg, between aquatic and terrestrial food webs has focused on terrestrial piscivores. However, a gap exists in our...

Data from: The influence of a semi-arid sub-catchment on suspended sediments in the Mara River, Kenya

Christopher L. Dutton, Amanda L. Subalusky, Shimon C. Anisfeld, Laban Njoroge, Emma J. Rosi & David M. Post
The Mara River Basin in East Africa is a trans-boundary basin of international significance experiencing excessive levels of sediment loads. Sediment levels in this river are extremely high (turbidities as high as 6,000 NTU) and appear to be increasing over time. Large wildlife populations, unregulated livestock grazing, and agricultural land conversion are all potential factors increasing sediment loads in the semi-arid portion of the basin. The basin is well-known for its annual wildebeest (Connochaetes taurinus)...

Nitrification and denitrification in the Community Land Model compared to observations at Hubbard Brook Forest

Cynthia Nevison, Christine Goodale, Peter Hess, William Wieder, Julius Vira & Peter Groffman
Models of terrestrial system dynamics often include nitrogen (N) cycles to better represent N limitation of terrestrial carbon (C) uptake but simulating the fate of N in ecosystems has proven challenging. Here, key soil N fluxes and flux ratios from the Community Land Model version 5.0 (CLM5.0) are compared to an extensive set of observations from the Hubbard Brook Forest Long-Term Ecological Research (LTER) site in New Hampshire. Simulated fluxes include microbial immobilization and plant...

The macroecology and evolution of avian competence for Borrelia burgdorferi

Daniel Becker & Barbara Han
Aim: Predicting novel reservoirs of zoonotic pathogens would be improved by identifying inter-specific drivers of host competence, the ability to transmit pathogens to new hosts or vectors. Tick-borne pathogens can provide a useful model system, as larvae become infected only when feeding on a competent host during their first bloodmeal. For tick-borne diseases, competence has been best studied for Borrelia burgdorferi sensu lato (Bbsl), which causes Lyme borreliosis. Major reservoirs include several small mammal species,...

Data from: Influence of natural and novel organic carbon sources on denitrification in forest, degraded urban, and restored streams

Tamara A. Newcomer, Sujay S. Kaushal, Paul M. Mayer, Amy R. Shields, Elizabeth A. Canuel, Peter M. Groffman & Arthur J. Gold
Organic carbon is important in regulating ecosystem function, and its source and abundance may be altered by urbanization. We investigated shifts in organic carbon quantity and quality associated with urbanization and ecosystem restoration, and its potential effects on denitrification at the riparian–stream interface. Field measurements of streamwater chemistry, organic carbon characterization, and laboratory-based denitrification experiments were completed at two forested, two restored, and two unrestored urban streams at the Baltimore Long-Term Ecological Research site, Maryland,...

Data from: Climate and competition effects on tree growth in Rocky Mountain forests

Arne Buechling, Patrick H. Martin & Charles D. Canham
1. Climate is widely assumed to influence physiological and demographic processes in trees, and hence forest composition, biomass and range limits. Growth in trees is an important barometer of climate change impacts on forests as growth is highly correlated with other demographic processes including tree mortality and fecundity. 2. We investigated the main drivers of diameter growth for five common tree species occurring in the Rocky Mountains of the western United States using non-linear regression...

Data from: Organic matter loading by hippopotami causes subsidy overload resulting in downstream hypoxia and fish kills

Christopher L. Dutton, Amanda L. Subalusky, Stephen K. Hamilton, Emma J. Rosi & David M. Post
Organic matter and nutrient loading into aquatic ecosystems affects ecosystem structure and function and can result in eutrophication and hypoxia. Hypoxia is usually attributed to anthropogenic pollution and is rarely documented in unpolluted systems, particularly in rivers. Here we show that organic matter loading from hippopotami causes the repeated occurrence of hypoxia in the Mara River, East Africa. We documented 49 high flow events over three years that caused dissolved oxygen decreases, including 13 events...

Data from: Long-term population dynamics of dreissenid mussels (Dreissena polymorpha and D. rostriformis): a cross-system analysis

David L. Strayer, Boris V. Adamovich, Rita Adrian, David C. Aldridge, Csilla Balogh, Lyubov E. Burlakova, Hannah B. Fried-Petersen, László G.‐Tóth, Amy L. Hetherington, Thomas S. Jones, Alexander Y. Karatayev, Jacqueline B. Madill, Oleg A. Makarevich, J. Ellen Marsden, Andre L. Martel, Dan Minchin, Thomas F. Nalepa, Ruurd Noordhuis, Timothy J. Robinson, Lars G. Rudstam, Astrid N. Schwalb, David R. Smith, Alan D. Steinman & Jonathan M. Jeschke
Dreissenid mussels (including the zebra mussel Dreissena polymorpha and the quagga mussel D. rostriformis) are among the world's most notorious invasive species, with large and widespread ecological and economic effects. However, their long‐term population dynamics are poorly known, even though these dynamics are critical to determining impacts and effective management. We gathered and analyzed 67 long‐term (>10 yr) data sets on dreissenid populations from lakes and rivers across Europe and North America. We addressed five...

Data from: Rodent reservoirs of future zoonotic diseases

Barbara A. Han, John Paul Schmidt, Sarah E. Bowden & John M. Drake
Forecasting reservoirs of zoonotic disease is a pressing public health priority. We apply machine learning to datasets describing the biological, ecological, and life history traits of rodents, which collectively carry a disproportionate number of zoonotic pathogens. We identify particular rodent species predicted to be novel zoonotic reservoirs and geographic regions from which new emerging pathogens are most likely to arise. We also describe trait profiles—complexes of biological features—that distinguish reservoirs from nonreservoirs. Generally, the most...

Data from: Decoupling of genetic and phenotypic divergence in a headwater landscape

Winsor H. Lowe, Mark A. McPeek, Gene E. Likens & Bradley J. Cosentino
In stream organisms, the landscape affecting intraspecific genetic and phenotypic divergence is comprised of two fundamental components: the stream network and terrestrial matrix. These components are known to differentially influence genetic structure in stream species, but, to our knowledge, no study has compared their effects on genetic and phenotypic divergence. We examined how the stream network and terrestrial matrix affect genetic and phenotypic divergence in two stream salamanders, Gyrinophilus porphyriticus and Eurycea bislineata, in the...

Data from: A 37-year experimental study of effects of structural alterations on a shrub community in the Mojave Desert, California

Bruce E. Mahall, Paul J. Fonteyn, Ragan M. Callaway & William H. Schlesinger
1. In 1977 an experiment was initiated in the Mojave Desert to investigate how shrub interactions affect structure in a community dominated by Ambrosia dumosa and Larrea tridentata. Here, as in much of the Mojave, Larrea were regularly distributed, Ambrosia occurred in aggregations, and the two were randomly distributed relative to each other. Pre-dawn xylem pressure potentials (PDXPPs) of single Ambrosia or Larrea in centers of 100m2 circular plots were monitored to assess effects of...

Data from: Tick-borne disease risk in a forest food web

Richard S. Ostfeld, Taal Levi, Felicia Keesing, Kelly Oggenfuss & Charles D. Canham
Changes to the community ecology of hosts for zoonotic pathogens, particularly rodents, are likely to influence the emergence and prevalence of zoonotic diseases worldwide. However, the complex interactions between abiotic factors, pathogens, vectors, hosts, and both food resources and predators of hosts are difficult to disentangle. Here we (1) use 19 years of data from six large field plots in southeastern New York to compare the effects of hypothesized drivers of interannual variation in Lyme...

Data from: Neighborhood-scale analyses of non-additive species effects on cation concentrations in forest soils

Seth Bigelow & Charles Canham
Trees affect soil chemistry and nutrient availability via a broad range of processes. Effects can vary dramatically among species, whose distinctive spatial “footprints” can vary for different nutrients. Potentially overlapping effects of neighboring trees in mixed-species stands make footprint shape and interspecific interactions important: If interactions are non-additive, then not only abundance but also spatial configuration influence tree species’ effects on ecosystem properties. We used spatially explicit neighborhood-scale data on tree distributions to fit maximum...

Data from: Fog as a source of nitrogen for redwood trees: evidence from fluxes and stable isotopes

Pamela H. Templer, Kathleen C. Weathers, Holly A. Ewing, Todd E. Dawson, Stefania Mambelli, Amanda M. Lindsey, Jeramy Webb, Vanessa K. Boukili & Mary K. Firestone
A defining feature of the redwood forest in coastal California is the presence of fog in the summer months, a time when there is typically little rainfall. Our goal was to determine the role of summer fog in canopy transformation of nitrogen, nitrogen uptake by trees and photosynthesis within a coastal redwood forest ecosystem. We measured horizontal and vertical inputs of nitrogen, the isotopic composition of nitrogen in a variety of atmospheric sources (summer fog,...

Regional wetland plant responses to sulfur and other porewater chemistry in calcareous rich fens

Samuel M. Simkin, Barbara L. Bedford & Kathleen C. Weathers
Many wetland environmental gradients structure plant community composition, yet controls of plant community composition within rich fens, botanically diverse groundwater-fed wetlands, are still incompletely understood. Porewater chemistry and plant community composition were recorded for eight calcareous rich fens encompassing both calcium carbonate and calcium sulfate geological inputs in the Central New York State region. As expected, porewater sulfate and sulfide concentrations were on average higher for wetlands overlying calcium sulfate than for wetlands overlying calcium...

Data for: Effects of physical impairments on fitness correlates of the white-footed mouse, Peromyscus leucopus

Francesca I. Rubino, Kelly Oggenfuss & Richard S. Ostfeld
Physical impairments are widely assumed to reduce viability of individual animals, but their impacts on individuals within natural populations of vertebrates are rarely quantified. By monitoring wild populations of white-footed mice over 26 years, we assessed whether missing or deformed limbs, tail, or eyes influenced the survival, body mass, movement, and ectoparasite burden of their bearers. Of the 27,244 individuals monitored, 543 (2%) had visible physical impairments. Persistence times (survival) were similar between mice with...

Registration Year

  • 2021
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  • 2012

Resource Types

  • Dataset


  • Cary Institute of Ecosystem Studies
  • University of Montana
  • Bates College
  • University of Michigan-Ann Arbor
  • University of Georgia
  • Oregon State University
  • University of Wyoming
  • Yale University
  • University of Illinois at Urbana Champaign
  • Cornell University