65 Works

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

DANIEL MCGRATH & Keith Williams

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...

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...

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...

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...

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 … & Cesar Botero
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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

Registration Year

  • 2021

Resource Types

  • Dataset
  • Text


  • Colorado State University
  • United States Geological Survey
  • University of California, Davis
  • University of Wyoming
  • Stanford University
  • University of Wisconsin-Madison
  • University of Colorado Boulder
  • The Nature Conservancy
  • Food and Agriculture Organization of the United Nations