62 Works

Cameron Pass NASA SnowEx - Meadow TLS U-077 PS01 SV06

DANIEL MCGRATH & Keith Williams

Cameron Pass NASA SnowEx - Meadow TLS U-077 PS01 SV04

DANIEL MCGRATH & Keith Williams

Metabolic rate shapes phenotypic covariance among physiological, behavioral, and life history traits in honeybees

Stephen Mugel & Dhruba Naug
Metabolic rate is often cited as the fundamental rate that determines the rate of all biological processes by shaping energetic availability for the various behavioral and life history traits that contribute to performance. It has therefore been suggested that metabolic rate drives the widely observed covariance among these different levels of phenotypic traits. However, much of the work on this topic has relied on pairwise correlational analysis, thereby leaving an important gap in our understanding...

Data from: Ecological factors influence balancing selection on leaf chemical profiles of a wildflower

Lauren Carley, Julius Mojica, Baosheng Wang, Chia-Yu Chen, Ya-Ping Lin, Kasavajhala Prasad, Emily Chan, Che-Wei Hsu, Rose Keith, Chase Nuñez, Carrie Olson-Manning, Catherine Rushworth, Maggie Wagner, Jing Wang, Pei-Min Yeh, Michael Reichelt, Kathryn Ghattas, Jonathan Gershenzon, Cheng-Ruei Lee & Thomas Mitchell-Olds
Balancing selection is frequently invoked as a mechanism to maintain variation within and across populations. However, rigorous tests demonstrating balancing selection operating in nature are scarce, particularly on complex traits, which frequently display high levels of variation. Leveraging a focal polymorphism, leaf chemical profile in a perennial wildflower (Boechera stricta, Brassicaceae), we investigated the ecological and genetic mechanisms that may influence the maintenance of variation in this trait. A suite of common garden and greenhouse...

Plant traits and soil fertility mediate productivity losses under extreme drought in C3 grasslands

Wentao Luo, Robert Griffin-Nolan, Wang Ma, Bo Liu, Xiaoan Zuo, Chong Xu, Qiang Yu, Yahuang Luo, Pierre Mariotte, Melinda Smith, Scott Collins, Alan Knapp, Zhengwen Wang & Xingguo Han
Extreme drought decreases aboveground net primary production (ANPP) in most grasslands, but the magnitude of ANPP reductions varies especially in C3-dominated grasslands. Because the mechanisms underlying such differential ecosystem responses to drought are not well-resolved, we experimentally imposed an extreme 4-year drought (2015-2018) in two C3 grasslands that differed in aridity. These sites had similar annual precipitation and dominant grass species (Leymus chinensis) but different annual temperatures and thus water availability. Drought treatments differentially affected...

Precipitation manipulation and terrestrial carbon cycling: the roles of treatment magnitude, experimental duration, and local climate

Jinsong Wang, Dashuan Tian, Alan K. Knapp, Han Y. H. Chen, Yiqi Luo, Zhaolei Li, Enqing Hou, Xinzhao Huang, Lifen Jiang & Shuli Niu
Aim: Precipitation manipulation experiments have shown diverse terrestrial carbon (C) cycling responses when the ecosystem is subjected to different magnitudes of altered precipitation, various experimental durations, or heterogeneity in local climate. However, how these factors combine to affect C cycle responses to changes in precipitation remains unclear. Location: Global. Time period: 1990–2019. Major taxa studied: Terrestrial ecosystems. Methods: Using observations from 230 published studies in which precipitation was manipulated and terrestrial C cycling variables were...

Species mixture effects and climate influence growth, recruitment and mortality in Interior West U.S.A. Populus tremuloides - conifer communities

Christopher Looney, Wilfred Previant, John Bradford & Linda Nagel
Tree-species mixture effects (e.g., complementarity and facilitation) have been found to increase individual-tree productivity, lessen mortality, and improve recruitment in forests worldwide. By promoting more efficient and complete resource use, mixture effects may also lessen individual-tree-level water stress, thus improving drought-resistance. We investigated the influence of mixture effects on tree productivity, mortality, and recruitment across broad compositional and moisture gradients in high-elevation Interior West US mixed-conifer communities, where Populus tremuloides (trembling aspen) is the major...

Leveraging genomics to understand threats to migratory birds

Brenda Larison, Alec R. Lindsay, Christen Bossu, Michael D. Sorenson, Joseph D. Kaplan, David C. Evers, James Paruk, Jeffrey M. DaCosta, Thomas B. Smith & Kristen Ruegg
Understanding of how risk factors affect populations across their annual cycle is a major challenge for conserving migratory birds. For example, disease outbreaks may happen on the breeding grounds, the wintering grounds, or during migration, and are expected to accelerate under climate change. The ability to identify the geographic origins of individuals impacted, especially outside of breeding areas, might make it possible to predict demographic trends and inform conservation decision making. However, such an effort...

A worldwide assessment of soil macroinvertebrate communities

Patrick Lavelle, Jerome Mathieu, Alister Spain, George Brown, Carlos Fragoso, Emmanuel Lapied, Adriana De Aquino, Isabelle Barois, Edmundo Barrios, Eleusa Barros, Juan Camilo Bedano, Eric Blanchart, Mark Caulfield, Yamileth Chagueza, Jun Dai, Thibaud Decaens, Anahi Domninquez, Yamileth Dominquez, Alex Feijoo, Patricia Folgaraiti, Steven Fonte, Norma Gorosito, Esperanza Huerta, Juan Jose Jimenez, Courtland Kelly … & Chi Zhang
Soil macroinvertebrate communities have been assessed worldwide using the standard ISO/TSBF sampling procedure. The Macrofauna database currently comprises 3694 sites distributed throughout 41 countries, from 55º S latitude to 57ºN, sea level to over 4000m in elevation, in total annual total rainfall regimes between 500 and >3000mm and 5 to 32ºC mean temperature. These communities are significantly influenced by climatic parameters, soil texture and vegetation cover. Abundance and diversity were highest in tropical rain forests...

Body size is associated with yearling breeding and extra-pair mating in the Island Scrub-Jay

Michelle A. Desrosiers, Kathryn M. Langin, W. Chris Funk, T. Scott Sillett, Scott A. Morrison, Cameron K. Ghalambor & Lisa M. Angeloni
Large body size is an important determinant of individual fitness in many animal species, especially in island systems where habitat saturation may result in strong intraspecific competition for mates and breeding territories. Here we show that large body size is associated with benefits to yearling breeding and extra-pair mating in the Island Scrub-Jay (Aphelocoma insularis), endemic to Santa Cruz Island, California. This species is approximately 20% larger than its mainland congener, consistent with the island...

Automated audio recording as a means of surveying Tinamous (Tinamidae) in the Peruvian Amazon

Reid Rumelt, Arianna Basto & Carla Mere Roncal
The use of machine learning technologies to process large quantities of remotely-collected audio data is a powerful emerging research tool in ecology and conservation. We applied these methods to a field study of tinamou (Tinamidae) biology in Madre de Dios, Peru, a region expected to have high levels of interspecies competition and niche partitioning as a result of high tinamou alpha diversity. We used autonomous recording units to gather environmental audio over a period of...

Vegetation characteristics and precipitation jointly influence grassland bird abundance beyond the effects of grazing management

Kristin Davis, David Augustine, Adrian Monroe & Cameron Aldridge
Grassland birds have experienced some of the steepest population declines of any guild of birds in North America. The shortgrass steppe contains some of North America’s most-intact grasslands, which makes the region particularly important for these species. Grassland birds differentially respond to variation in vegetation structure generated by spatiotemporally-varying disturbance like grazing management. However, understanding how species respond to characteristics beyond vegetation structure or grazing could better inform management for these species in the shortgrass...

A genetically based ecological trade-off contributes to setting a geographic range limit

Alexander Mauro, Julian Torres-Dowdall, Craig Marshall & Cameron Ghalambor
Understanding the ecological factors that shape geographic range limits and the evolutionary constraints that prevent populations from adaptively evolving beyond these limits is an unresolved question. Here, we investigated why the euryhaline fish, Poecila reticulata, is confined to freshwater within its native range, despite being tolerant of brackish water. We hypothesized that competitive interactions with a close relative, Poecilia picta, in brackish water prevents P. reticulata from colonizing brackish water. Using a combination of field...

The lion's mane: sexual and natural selection on pollen morphology in Taraxacum

Austin Lynn, Emelyn Piotter, Ellie Harrison & Candace Galen
Premise of the study: Spiny pollen has evolved independently in multiple entomophilous lineages. Sexual selection may act on exine traits that facilitate male mating success by influencing the transfer of pollen from the anther to the body of the pollinator, while natural selection acts to increase pollen survival. We postulated that relative to sexual congeners, apomictic dandelions undergo relaxed selection on traits associated with male mating success. Methods: We explored sexual selection on exine traits...

Population dynamics of little brown bats (Myotis lucifugus) at summer roosts: apparent survival, fidelity, abundance, and the influence of winter conditions

Robert Schorr & Jeremy Siemers
1. White-nose syndrome (WNS) has caused the death of millions of bats, but the impacts have been more difficult to identify in western North America. Understanding how WNS, or other threats, impact western bats may require monitoring other roosts, such as maternity roosts and night roosts, where bats aggregate in large numbers. 2. Little brown bats (Myotis lucifugus) are experiencing some of the greatest declines from WNS. Estimating survival and understanding population dynamics can provide...

Functional connectivity in a continuously distributed, migratory species as revealed by landscape genomics

Melanie E. F. LaCava, Roderick B. Gagne, Kyle D. Gustafson, Sara J. Oyler-McCance, Kevin L. Monteith, Hall Sawyer, Matthew J. Kauffman, Daniel J. Thiele & Holly B. Ernest
Maintaining functional connectivity is critical for the long-term conservation of wildlife populations. Landscape genomics provides an opportunity to assess long-term functional connectivity by relating environmental variables to spatial patterns of genomic variation resulting from generations of movement, dispersal, and mating behaviors. Identifying landscape features associated with gene flow at large geographic scales for highly mobile species is becoming increasingly possible due to more accessible genomic approaches, improved analytical methods, and enhanced computational power. We characterized...

Discharge and suspended sediment a paired watershed study examining the effects of contemporary forest harvesting in the Oregon Coast Range

Jeff Hatten, Catalina Segura, Kevin Bladon, Cody Hale, George G. Ice & John Stednick
Forest harvesting practices can expose mineral soils, decrease infiltration capacities of soils, disturb the stream bank and channel, and increase erosion and fine sediment supply to stream channels. To reduce nonpoint source sediment pollution associated with forest management activities and to maintain the high water quality typically provided from forests, best management practices (BMPs) were developed and implemented. The Alsea Watershed Study was an important early research site that lead to the development of contemporary...

Cameron Pass NASA SnowEx - Meadow TLS U-077 PS01 SV05

DANIEL MCGRATH & Keith Williams

Horizontal gene transfer is the main driver of antimicrobial resistance in broiler chicks infected with Salmonella enterica serovar Heidelberg

Adelumola Oladeinde, Zaid Abdo, Maximilian Press, Kimberly Cook, Nelson Cox, Benjamin Zwirzitz, Reed Woyda, Steven Lakin, , Torey Looft, Douglas Cosby, , Jean Guard, Eric Line, Michael Rothrock, Mark Berrang, Kyler Herrington, Gregory Zock, Jodie Plumblee Lawrence, Denice Cudnik, Sandra House, Kimberly Ingram, Leah Lariscy, Robert Wagner, Samuel Aggrey … & Casey Ritz
Overuse and misuse of antibiotics in clinical settings and in food production have been linked to the increased prevalence and spread of antimicrobial resistance (AR). Consequently, public health and consumer concerns have resulted in a remarkable reduction in antibiotics used for food animal production. However, there are no data on the effectiveness of antibiotic removal in reducing AR shared through horizontal gene transfer (HGT). In this study, we used neonatal broiler chicks and Salmonella enterica...

North Pacific harbor porpoise SNP and microhaplotype genotypes, mitochondrial control region haplotype sequences

Phillip Morin, Brenna Forester, Karin Forney, Carla Crossman, Brittany Hancock-Hanser, Kelly Robertson, Lance Barrett-Lennard, Robin Baird, John Calambokidis, Pat Gearin, Bradley Hanson, Cassie Schumacher, Timothy Harkins, Michael Fontaine, Barbara Taylor & Kim Parsons
Harbor porpoises in the North Pacific are found in coastal waters from southern California to Japan, but population structure is poorly known outside of a few local areas. We used multiplexed amplicon sequencing of 292 loci and genotyped clusters of SNPs as microhaplotypes (N=271 samples) in addition to mtDNA sequence data (N=413 samples), to examine the genetic structure from samples collected along the Pacific coast and inland waterways from California to southern British Columbia. We...

Demographic responses to climate change in a threatened Arctic species

Kylee D. Dunham, Anna M. Tucker, David N. Koons, Asheber Abebe, F. Stephen Dobson & James B. Grand
The Arctic is undergoing rapid and accelerating change in response to global warming, altering biodiversity patterns and ecosystem function across the region. For Arctic endemic species, our understanding of the consequences of such change remains limited. Spectacled eiders (Somateria fischeri), a large Arctic sea duck, use remote regions in the Bering Sea, Arctic Russia, and Alaska throughout the annual cycle making it difficult to conduct comprehensive surveys or demographic studies. Listed as Threatened under the...

Channel Islands song sparrow (Melospiza melodia) landscape genomics and adaptation to climate with gene flow dataset

Maybellene Gamboa
Disentangling the effects of neutral and adaptive processes in maintaining phenotypic variation across environmental gradients is challenging in natural populations. Song sparrows (Melospiza melodia) on the California Channel Islands occupy a pronounced east-west climate gradient within a small spatial extent, providing a unique opportunity to examine the interaction of genetic isolation (gene flow) and the environment (selection) in driving variation. We used reduced representation genomic libraries to infer the role of neutral processes (drift and...

Adaptation and correlated fitness responses over two time scales in Drosophila suzukii populations evolving in different environments

Laure Olazcuaga, Julien Foucaud, Mathieu Gautier, Candice Deschamps, Anne Loiseau, Nicolas Leménager, Benoit Facon, Virginie Ravigné, Ruth A. Hufbauer, Arnaud Estoup & Nicolas O. Rode
The process of local adaptation involves differential changes in fitness over time across different environments. While experimental evolution studies have extensively tested for patterns of local adaptation at a single time point, there is relatively little research that examines fitness more than once during the time course of adaptation. We allowed replicate populations of the fruit pest Drosophila suzukii to evolve in one of eight different fruit media. After five generations, populations with the highest...

Genotyping-by-sequencing data for a Haitian sorghum breeding program

Geoffrey Morris, Terry Felderhoff, Noah Winans, Rachel Walstead, Jean Rigaud Charles, Gael Pressoir & Kebede Muleta
Rapid environmental change can lead to extinction of populations or evolutionary rescue via genetic adaptation. In the past several years, smallholder and commercial cultivation of sorghum (Sorghum bicolor), a global cereal and forage crop, has been threatened by a global outbreak of an aggressive new biotype of sugarcane aphid (SCA; Melanaphis sacchari). Here we characterized genomic signatures of adaptation in a Haitian sorghum breeding population, which had been recently founded from admixed global germplasm, extensively...

A unifying framework for analyzing temporal changes in functional and taxonomic diversity along disturbance gradients

Erin Larson, N. Leroy Poff, W. Chris Funk, Rachel Harrington, Boris Kondratieff, Scott Morton & Alexander Flecker
Frameworks exclusively considering functional diversity are gaining popularity, as they complement and extend the information provided by taxonomic diversity metrics, particularly in response to disturbance. Taxonomic diversity should be included in functional diversity frameworks to uncover the functional mechanisms causing species loss following disturbance events. We present and test a predictive framework that considers temporal functional and taxonomic diversity responses along disturbance gradients. Our proposed framework allows us to test different multidimensional metrics of taxonomic...

Registration Year

  • 2021

Resource Types

  • Dataset
  • Text


  • Colorado State University
  • United States Geological Survey
  • University of California, Davis
  • University of Wyoming
  • Stanford University
  • The Nature Conservancy
  • Food and Agriculture Organization of the United Nations
  • University of Minnesota
  • United States Department of Agriculture