25 Works

Data from: Assessing avian diversity and community composition along a successional gradient in traditional Lacandon Maya agroforests

Tomasz B. Falkowski, José Raúl Vázquez Pérez, Adolfo Chankin, Atzin Campos, José Luis Rangel, Jonathan B. Cohen & Stewart A.W. Diemont
Evidence regarding the ability of agroforests to conserve biological diversity has been mixed; they tend to maintain avian communities with species richness similar to that of undisturbed forest ecosystems but generally do not completely preserve community composition. Using a combination of occupancy modeling and non-metric multidimensional scaling on point-count data, we assessed changes in avian community diversity and composition along a successional gradient in traditional Lacandon Maya agroforests and compared them to protected areas in...

Habitat openness and edge avoidance predict saltmarsh sparrow abundance better than habitat area

Hallie Marshall, Erik Blomberg, Valerie Watson, Meaghan Conway, Jonathan Cohen, Maureen Correll, Chris Elphick, Thomas Hodgman, Alison Kocek, Adrienne Kovach, W. Gregory Shriver, Whitney Wiest & Brian Olsen
The Saltmarsh Sparrow (Ammospiza caudacuta) is a tidal marsh bird facing rapid population decline throughout its range, largely caused by degradation and loss of breeding habitat. Thus there is a need to preserve tidal marshes in the northeastern United States, but to do so requires an understanding of the habitat features that support robust populations. Previous studies have shown Saltmarsh Sparrow abundance increases with marsh size, but in similar bird species, area sensitivity is more...

Survival and density of New England cottontail and Eastern cottontail

Amanda Cheeseman
Habitat quality regulates fitness and population density, making it a key driver of population size. Hence, increasing habitat quality is often a primary goal of species conservation. Yet assessments of fitness and density are difficult and costly to obtain. Therefore, species conservation often uses “best available science”, extending inferences across taxa, space or time, and inferring habitat quality from studies of habitat selection. However, there are scenarios where habitat selection is not reflective of habitat...

Data from: Efficacy of spotlights and thermal cameras to detect lions, Panthera leo, and spotted hyenas, Crocuta crocuta, depends on species and management regime

Stanslaus Mwampeta, Jerrold Belant, Eivin Røskaft, Robert Fyumagwa, Imani Mkasanga, Clay Wilton, Imani Mkasanga, Florent Bled, Lusato Masinde, Eivin Røskaft & Peter Ranke
Accurate abundance estimates can contribute to effective management of large carnivore populations. Lion, Panthera leo, and spotted hyena, Crocuta crocuta, populations are frequently estimated at night by eliciting their approach using broadcasted vocalizations. Spotlights are typically used to observe these species on approach but can disturb animals and adversely affect counts. We compared the efficacy of spotlight with red filters and forward looking infrared (FLIR) thermal monocular to enumerate lions and spotted hyenas in Serengeti...

Canopy gaps facilitate upslope shifts in montane conifers but not in temperate deciduous trees in the Northeastern United States

Jordon Tourville, Jay Wason & Martin Dovciak
Many montane tree species are expected to migrate upslope as climate warms, but it is not clear if forest canopy gaps, which can facilitate tree seedling recruitment, serve as an important mechanism driving tree species range shifts. Patterns of tree seedling establishment can inform us about early stages of tree species migrations and are critical to examine in the context of global climate change. We contrasted elevational distributions of tree seedlings both within and outside...

Balsam fir seedling bank in Whiteface Mountain (2014–2015)

Monica Bibiana Berdugo Moreno, Martin Dovciak, Robin W. Kimmerer & Charles T. Driscol
The persistence of future forests depends on the success of tree seedlings which are experiencing increasing physiological stress from changing climate and air pollution. Although the moss layer can serve as an important substrate for tree seedlings, its potential for reducing environmental stress and enhancing the establishment of seedlings remains poorly understood. We tested if the moss layer decreased environmental stress and increased the abundance of balsam fir seedlings dominant in high-elevation forests of the...

Data from: The extension of internal humidity levels beyond the soil surface facilitates mound expansion in Macrotermes

Daniel S. Calovi, Paul Bardunias, Nicole Carey, Rupert Soar, Scott Turner, Radhika Nagpal & Justin Werfel
Termites in the genus Macrotermes construct large-scale soil mounds above their nests. The classic explanation for how termites coordinate their labour to build the mound, based on a putative cement pheromone, has recently been called into question. Here we present evidence for an alternate interpretation based on sensing humidity. The high humidity characteristic of the mound internal environment extends a short distance into the low-humidity external world, in a “bubble” that can be disrupted by...

Relative reproductive phenology and synchrony affect neonate survival in a nonprecocial ungulate

Eric Michel, Bronson Strickland, Stephen Demarais, Jerrold Belant, Todd Kautz, Jared Duquette, Dean Beyer, Michael Chamberlain, Karl Miller, Rebecca Shuman, John Kilgo, Duane Diefenbach, Bret Wallingford, Justin Vreeland, Steve Ditchkoff, Christopher DePerno, Christopher Moorman, Michael Chitwood & Marcus Lashley
1. Degree of reproductive synchronization in prey is hypothesized as a predator defense strategy reducing prey risk via predator satiation or predator avoidance. Species with precocial young, especially those exposed to specialist predators, should be highly synchronous to satiate predators (predator satiation hypothesis), while prey with nonprecocial (i.e., altricial) young, especially those exposed to generalist predators, should become relatively asynchronous to avoid predator detection (predator avoidance hypothesis). The white-tailed deer (Odocoileus virginianus) in North America...

Data from: Parasitism offers large rewards but carries high risks: predicting parasitic strategies under different life history conditions in lampreys

Thomas M. Evans & Karin E. Limburg
The loss of parasitism in metazoan lineages is often seen as unlikely, but it has occurred in some lineages (e.g., leeches, lampreys). How and why parasitism is lost is aptly addressed by studying lampreys, because extant species include a range of feeding modes and parasitism has been lost repeatedly. An individual‐based model was developed to determine if variations in survival and growth rates in the larval and juvenile stages could favor parasitic or non‐parasitic strategies....

Stable-isotopes (δ2H, δ13C) within feathers from harvested American black ducks (2017-2020)

Jackson Kusack, Douglas Tozer, Michael Schummer & Keith Hobson
Stable isotope data from American Black Duck feathers (n = 665) and associated harvest data. The first primary feather (P1) was collected from wings submitted to the Species Composition Survey in Canada and Parts Collection Survey in the United States. From available feathers, we selected individuals for stable-isotope analysis stratified by black duck conservation region, sex, age, and date of harvest, where possible. These data are those that were selected for stable-hydrogen isotope analysis. See...

Data from: Unravelling the life history of Amazonian fishes through otolith microchemistry

Theodore W. Hermann, Donald J. Stewart, Karin E. Limburg & Leandro Castello
Amazonian fishes employ diverse migratory strategies, but the details of these behaviours remain poorly studied despite numerous environmental threats and heavy commercial exploitation of many species. Otolith microchemistry offers a practical, cost-effective means of studying fish life history in such a system. This study employed a multi-method, multi-elemental approach to elucidate the migrations of five Amazonian fishes: two ‘sedentary’ species (Arapaima sp. and Plagioscion squamosissimus), one ‘floodplain migrant’ (Prochilodus nigricans) and two long-distance migratory catfishes...

Data from: Development and validation of rapid environmental DNA (eDNA) detection methods for bog turtle (Glyptemys muhlenbergii)

Anish Kirtane, Maxwell Wilder & Hyatt Green
Bog turtles Glyptemys muhlenbergii are listed as Species of Greatest Conservation Need (SGCN) for wildlife action plans in every state it occurs and multi-state efforts are underway to better characterize extant populations and prioritize restoration efforts. However, traditional sampling methods can be ineffective due to the turtle’s wetland habitat, small size, and burrowing nature. Molecular methods, such as qPCR, provide the ability to overcome this challenge by effectively quantifying minute amounts of turtle DNA left...

Data from: Robust inference on large-scale species habitat use with interview data: the status of jaguars outside protected areas in Central America

Lisanne S. Petracca, Jacqueline L. Frair, Jonathan B. Cohen, Ana Patricia Calderón, Javier Carazo-Salazar, Franklin Castañeda, Daniel Corrales-Gutiérrez, Rebecca J. Foster, Bart Harmsen, Sandra Hernández-Potosme, Luis Herrera, Melva Olmos, Sandy Pereira, Hugh S. Robinson, Nathaniel Robinson, Roberto Salom-Pérez, Yahaira Urbina, Kathy A. Zeller & Howard Quigley
Evaluating range-wide habitat use by a target species requires information on species occurrence over broad geographic regions, a process made difficult by species rarity, large spatiotemporal sampling domains, and imperfect detection. We address these challenges in an assessment of habitat use for jaguars (Panthera onca) outside protected areas in Central America. Occurrence records were acquired within 12 putative corridors using interviews with knowledgeable corridor residents. We developed a Bayesian hierarchical occupancy model to gain robust...

Data from: Shade trees preserve avian insectivore biodiversity on coffee farms in a warming climate

Sarah Schooler
Includes a dataset of avian insectivore occurance data from 77 avian insectivores from 1970 to 2018 used in "Shade trees preserve avian insectivore biodiversity on coffee farms in a warming climate" downloaded from GBIF. Also included are full Maxent models and raster projections for the best selected model for each species for all climate scenarios, as well as a file on which threshold was selected for each species. Also included is all R code used...

Interference competition between wolves and coyotes during variable prey abundance

Tyler Petroelje, Jerrold Belant, Dean Beyer & Todd Kautz
Interference competition occurs when two species have similar resource requirements and one species is dominant and can suppress or exclude the subordinate species. Wolves (Canis lupus) and coyotes (C. latrans) are sympatric across much of their range in North America where white-tailed deer (Odocoileus virginianus) can be an important prey species. We assessed the extent of niche overlap between wolves and coyotes using activity, diet, and space use as evidence for interference competition during 3...

Data from: Classification and mapping of low-statured 'shrubland' cover types in post-agricultural landscapes of the US Northeast

Michael Mahoney, Lucas Johnson & Colin Beier
Novel plant communities reshape landscapes and pose challenges for land cover classification and mapping that can constrain research and stewardship efforts. In the US Northeast, emergence of low-statured woody vegetation, or 'shrublands', instead of secondary forests in post-agricultural landscapes is well-documented by field studies, but poorly understood from a landscape perspective, which limits the ability to systematically study and manage these lands. To address gaps in classification/mapping of low-statured cover types where they have been...

Development and validation of an eDNA protocol for monitoring endemic Asian Spiny Frogs in the Himalayan region of Pakistan

Muhammad Saeed, Muhammad Rais, Ayesha Akram, Maggie Williams, Kenneth Kellner, Syed Hashsham & Drew Davis
Wildlife monitoring programs are instrumental for the assessment of species, habitat status, and for the management of factors affecting them. This is particularly important for species found in freshwater ecosystems, such as amphibians, as they have higher estimated extinction rates than terrestrial species. We developed and validated two species-specific environmental DNA (eDNA) protocols and applied them in the field to detect the Hazara Torrent Frog (Allopaa hazarensis) and Murree Hills Frog (Nanorana vicina). Additionally, we...

Data from: Combining genetic and demographic information to prioritize conservation efforts for anadromous alewife and blueback herring

Eric P. Palkovacs, Daniel J. Hasselman, Emily E. Argo, Stephen R. Gephard, Karin E. Limburg, David M. Post, Thomas F. Schultz & Theodore V. Willis
A major challenge in conservation biology is the need to broadly prioritize conservation efforts when demographic data are limited. One method to address this challenge is to use population genetic data to define groups of populations linked by migration and then use demographic information from monitored populations to draw inferences about the status of unmonitored populations within those groups. We applied this method to anadromous alewife (Alosa pseudoharengus) and blueback herring (Alosa aestivalis), species for...

Data from: Initial genetic diversity enhances population establishment and alters genetic structuring of a newly established Daphnia metapopulation

Christopher J. Holmes, Jelena H. Pantel, Kimberly L. Schulz & Carla E. Cáceres
When newly created habitats are initially colonized by genotypes with rapid population growth rates, later arriving colonists may be prevented from establishing. Although these priority effects have been documented in multiple systems, their duration may be influenced by the diversity of the founding population. We conducted a large-scale field manipulation to investigate how initial clonal diversity influences temporal and landscape patterns of genetic structure in a developing metapopulation. Six genotypes of obligately asexual Daphnia pulex...

Influence of biological and environmental conditions on winter mortality risk of a northern ungulate: evidence for a late-winter survival bottleneck

Todd Kautz
1. A relationship between winter weather and survival of northern ungulates has long been established, yet the possible roles of biological (e.g., nutritional status) and environmental (e.g., weather) conditions make it important to determine which potential limiting factors are most influential. 2. Our objective was to examine the potential effects of individual (body mass and age) and extrinsic (winter severity and snow melt conditions) factors on the magnitude and timing of mortality for adult (>2.5...

Data from - Ecological insights from three decades of animal movement tracking across a changing Arctic

Gil Bohrer, Sarah Davidson, Eliezer Gurarie, Scott LaPoint, Peter Mahoney, Emma Grier, Ophélie Couriot, Allicia Kelly, Bryan Bedrosian, Jerrold Belant, Travis Booms, Bridget Borg, Stan Boutin, Erica Craig, Tracy Davison, Robert Domenech, James Hodson, Kyle Joly, Nicholas Larter, A. David M. Latham, Stephen Lewis, Carol McIntyre, Tricia Miller, Kelsey Russell, Dale Seip … & Judy Williams
We provide here the data used in analysis of 3 test cases, presented in the manuscript "Ecological insights from three decades of animal movement tracking across a changing Arctic". We utilized the new Arctic Animal Movement Archive (AAMA), a growing collection of 201 standardized terrestrial and marine animal tracking studies from 1991–present. The AAMA supports public data discovery, preserves fundamental baseline data for the future, and facilitates efficient, collaborative data analysis. With three AAMA-based case...

Data from: Responses of sympatric canids to human development revealed through citizen science

Kenneth Kellner, Jacob Hill, Mariela Gantchoff, David Kramer, Amanda Bailey & Jerrold Belant
Measuring wildlife responses to anthropogenic activities often requires long-term, large-scale datasets that are difficult to collect. This is particularly true for rare or cryptic species, which includes many mammalian carnivores. Citizen science, in which members of the public participate in scientific work, can facilitate collection of large datasets while increasing public awareness of wildlife research and conservation. Hunters provide unique benefits for citizen science given their knowledge and interest in outdoor activities. We examined how...

Data from: A surface renewal model for unsteady-state mass transfer using the generalized Danckwerts age distribution function

Isabelle Horvath, Siddharth G. Chatterjee & Isabelle R. Horvath
The recently derived steady-state generalized Danckwerts age distribution is extended to unsteady-state conditions. For three different wind speeds used by researchers on air-water heat exchange on the Heidelberg Aeolotron, calculations reveal that the distribution has a sharp peak during the initial moments, but flattens out and acquires a bell-shaped character with process time, with the time taken to attain a steady-state profile being a strong and inverse function of wind speed. With rising wind speed,...

Additional file 1 of Genetic diversity and family groups detected in a coyote population with red wolf ancestry on Galveston Island, Texas

Tanner M. Barnes, Melissa Karlin, Bridgett M. vonHoldt, Jennifer R. Adams, Lisette P. Waits, Joseph W. Hinton, Josh Henderson & Kristin E. Brzeski
Additional file 1. Microsatellite genotypes, ancestry statistics, and identification of private alleles.

Additional file 1 of Genetic diversity and family groups detected in a coyote population with red wolf ancestry on Galveston Island, Texas

Tanner M. Barnes, Melissa Karlin, Bridgett M. vonHoldt, Jennifer R. Adams, Lisette P. Waits, Joseph W. Hinton, Josh Henderson & Kristin E. Brzeski
Additional file 1. Microsatellite genotypes, ancestry statistics, and identification of private alleles.

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Affiliations

  • SUNY College of Environmental Science and Forestry
    25
  • Michigan Technological University
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  • Michigan Department of Natural Resources
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  • University of Maine
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    2
  • Queens College, CUNY
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    2