32 Works

Allometric modelling of plant biomass from drone-acquired photographs: drone images, ground control marker coordinates and biomass data from 36 sites, 2016-2020

A. Cunliffe, K. Anderson, F. Boschetti, H. Graham, R. Brazier, I. Myers-Smith, T. Astor, M. Boer, L. Calvo, P. Clark, M. Cramer, M. Encinas-Lara, S. Escarzaga, J. Fernández-Guisuraga, A. Fisher, K. Gdulová, B. Gillespie, A. Griebel, N. Hanan, M. Hanggito, S. Haselberger, C. Havrilla, W. Ji, J. Karl, M. Kirchhoff … & R. Wojcikiewicz
This dataset contains RGB photographs acquired from drone surveys. There are 741 harvest plots from 38 surveys at 36 sites around the world. Each site was approximately 1 ha in area. Included with the photographic images are the coordinates of ground control markers, biomass, taxonomic and location data for harvest plots and ancillary metadata. The observations can be used to obtain allometric size-biomass models. This work was supported by the Natural Environment Research Council award...

Arbuscular mycorrhizal fungi in roots and soil respond differently to biotic and abiotic factors in the Serengeti

Bo Stevens
This study explores the relationships of AM fungal abundance and diversity with biotic (host plant, ungulate grazing) and abiotic (soil properties, precipitation) factors in the Serengeti National Park, Tanzania. Soil and root samples were collected from grazed and ungrazed plots at seven sites across steep soil fertility and precipitation gradients. AM fungal abundance in the soil was estimated from the density of spores and the concentration of a fatty acid biomarker. Diversity of AM fungi...

Genetic data improves niche model discrimination and alters the direction and magnitude of climate change forecasts

Helen Bothwell, Luke Evans, Erika Hersch-Green, Scott Woolbright, Gerard Allan & Thomas Whitham
Ecological niche models (ENMs) have classically operated under the simplifying assumptions that there are no barriers to gene flow, species are genetically homogeneous (i.e., no population-specific local adaptation), and all individuals share the same niche. Yet, these assumptions are violated for most broadly distributed species. Here we incorporate genetic data from the widespread riparian tree species narrowleaf cottonwood (Populus angustifolia) to examine whether including intraspecific genetic variation can alter model performance and predictions of climate...

Thoracic gas compression during forced expiration is greater in men than women

Elizabeth Gideon, Troy Cross, Brooke Cayo, Aaron Betts, Dallin Merrell, Catherine Coriell, Lauren Hays & Joseph Duke
Intrapleural pressure during a forced vital capacity (VC) manoeuvre is often in excess of that required to generate maximal expiratory airflow. This excess pressure compresses alveolar gas (i.e., thoracic gas compression; TGC), resulting in underestimated forced expiratory flows (FEFs) at a given lung volume. It is unknown if TGC is influenced by sex; however, because men have larger lungs and stronger respiratory muscles, we hypothesized that men would have greater TGC. We examined TGC across...

Data from: A changing climate is snuffing out post-fire recovery in montane forests

Kyle Rodman, Thomas Veblen, Mike Battaglia, Marin Chambers, Paula Fornwalt, Zachary Holden, Thomas Kolb, Jessica Ouzts & Monica Rother
Aim: Climate warming is increasing fire activity in many of Earth’s forested ecosystems. Because fire is an important catalyst for change, investigation of post-fire vegetation response is crucial for understanding the potential for future conversions from forest to non-forest vegetation types. To better understand effects of wildfire and climate warming on forest recovery, we assessed the extent to which climate and terrain influence spatiotemporal variation in past and future post-fire tree regeneration. Location: Montane forests,...

Data from: Comparing traditional and Bayesian approaches to ecological meta-analysis

Paula Pappalardo, Kiona Ogle, Elizabeth Hamman, James Bence, Bruce Hungate & Craig Osenberg
1. Despite the wide application of meta-analysis in ecology, some of the traditional methods used for meta-analysis may not perform well given the type of data characteristic of ecological meta-analyses. 2. We reviewed published meta-analyses on the ecological impacts of global climate change, evaluating the number of replicates used in the primary studies (ni) and the number of studies or records (k) that were aggregated to calculate a mean effect size. We used the results...

Change in terrestrial human footprint drives continued loss of intact ecosystems

Brooke Williams, Oscar Venter, James Allan, Scott Atkinson, Jose Rehbein, Michelle Ward, Moreno Di Marco, Hedley Grantham, Jamison Ervin, Scott Goetz, Andrew Hansen, Patrick Jantz, Rajeev Pillay, Susana Rodríguez-Buriticá, Christina Supples, Anne Virnig & James Watson
Human pressure mapping is important for understanding humanity's role in shaping Earth’s patterns and processes. Our ability to map this influence has evolved, thanks to powerful computing, earth observing satellites, and new bottom-up census and crowd-sourced data. Here, we provide the latest temporally inter-comparable maps of the terrestrial human footprint, and assessment of change in human pressure at global, biome, and ecoregional scales. In 2013, 42% of terrestrial Earth could be considered relatively free of...

Gross primary production responses to warming, elevated CO2 , and irrigation: quantifying the drivers of ecosystem physiology in a semiarid grassland

Elise Pendall, Edmund M. Ryan, Kiona Ogle, Drew Peltier, David G. Williams, Anthony P. Walker, Martin G. De Kauwe, Belinda E. Medlyn, William Parton, Shinichi Asao, Bertrand Guenet, Anna B. Harper, Xingjie Lu, Kristina A. Luus, Sönke Zaehle, Shijie Shu, Christian Werner & Jianyang Xia
Determining whether the terrestrial biosphere will be a source or sink of carbon (C) under a future climate of elevated CO2 (eCO2) and warming requires accurate quantification of gross primary production (GPP), the largest flux of C in the global C cycle. We evaluated 6 years (2007–2012) of flux‐derived GPP data from the Prairie Heating and CO2 Enrichment (PHACE) experiment, situated in a grassland in Wyoming, USA. The GPP data were used to calibrate a...

Native biodiversity collapse in the Eastern Mediterranean

Paolo G. Albano, Jan Steger, Marija Bošnjak, Beata Dunne, Zara Guifarro, Elina Turapova, Quan Hua, Darrell Kaufman, Gil Rilov & Martin Zuschin
Global warming causes the poleward shift of the trailing edges of marine ectotherm species distributions. In the semi-enclosed Mediterranean Sea, continental masses and oceanographic barriers do not allow natural connectivity with thermophilic species pools: as trailing edges retreat, a net diversity loss occurs. We quantify this loss on the Israeli shelf, among the warmest areas in the Mediterranean, by comparing current native molluscan richness with the historical one obtained from surficial death assemblages. We recorded...

Data from: Submerged macrophytes affect the temporal variability of aquatic ecosystems

Moritz Lürig, Rebecca Best, Vasilis Dakos & Blake Matthews
1. Submerged macrophytes are important foundation species that can strongly influence the structure and functioning of aquatic ecosystems, but only little is known about the temporal variation and the timescales of these effects (i.e. from hourly, daily, to monthly). 2. Here, we conducted an outdoor experiment in replicated mesocosms (1000 L) where we manipulated the presence and absence of macrophytes to investigate the temporal variability of their ecosystem effects. We measured several parameters (chlorophyll-a, phycocyanin,...

Estimating social-ecological resilience: fire management futures in the Sonoran Desert

Clare Aslan, Manette Sandor, Martha Sample, Sasha Stortz, Sara Souther, Carrie Levine, Leah Samberg, Miranda Gray & Brett Dickson
Resilience quantifies the ability of a system to remain in or return to its current state following disturbance. Due to inconsistent terminology and usage of resilience frameworks, quantitative resilience studies are challenging, and resilience is often treated as an abstract concept rather than a measurable system characteristic. We used a novel, spatially-explicit stakeholder engagement process to quantify social-ecological resilience to fire, in light of modeled social-ecological fire risk, across the non-fire-adapted Sonoran Desert Ecosystem in...

Species asynchrony stabilises productivity under extreme drought across Northern China grasslands

Taofeek O. Muraina, Chong Xu, Qiang Yu, Yadong Yang, Minghui Jing, Xiaotong Jia, , Quockhanh Dam, Alan K. Knapp, Scott L. Collins, Yiqi Luo, Wentao Luo, Xiaoan Zuo, Xiaoping Xin, Xingguo Han & Melinda D. Smith
1. Biodiversity can stabilise productivity through different mechanisms, such as asynchronous species responses to environmental variability and species stability. Global changes, like intensified drought, could negatively affect species richness, species asynchrony, and species stability, but it is unclear how changes in these mechanisms will affect stability of aboveground primary productivity (ANPP) across ecosystems. 2. We studied the effects of a 4-year extreme drought on ANPP stability and the underlying mechanisms (species richness, species asynchrony, and...

Hyperspectral imagery of Pinus strobiformis infected with fungal pathogen

Marja Haagsma, Gerald F. M. Page & Jeremy S. Johnson
Hyperspectral images were taken from March till October, 2018, of southwestern white pine (Pinus strobiformis), SWWP, seedlings of ten different seed-source families. Half of the seedlings were inoculated with white pine blister rust (Cronartium ribicola). Visual assessments of vigor coincided with hyperspectral data acquisition. The aim of the experiment was to use hyperspectral data to automaticaly and objectively identify infection and degree of infection in SWWP seedlings. Moreover, we developed and evaluated a feature importance...

Data from: The genetic architecture of plant defense tradeoffs in a common monkeyflower

Nicholas Kooyers, Benjamin Blackman, Abigail Donofrio & Liza Holeski
Determining how adaptive combinations of traits arose requires understanding the prevalence and scope of genetic constraints. Frequently observed phenotypic correlations between plant growth, defenses, and/or reproductive timing have led researchers to suggest that pleiotropy or strong genetic linkage between variants affecting independent traits is pervasive. Alternatively, these correlations could arise via independent mutations in different genes for each trait and extensive correlational selection. Here we evaluate these alternatives by conducting a QTL mapping experiment involving...

Data from: Drought mildly reduces plant dominance in a temperate prairie ecosystem across years

Karen Castillioni, Kevin Wilcox, Lifen Jiang, Chang Gyo Jung, Yiqi Luo & Lara Souza
1. Shifts in dominance and species reordering can occur in response to global change. However, it is not clear how altered precipitation and disturbance regimes interact to affect species composition and dominance. 2. We explored community-level diversity and compositional similarity responses, both across and within years, to a manipulated precipitation gradient and annual clipping in a mixed-grass prairie in Oklahoma, USA. We imposed seven precipitation treatments (five water exclusion levels [-20%, -40%, -60%, -80%, and...

Vascular plant community data for Northwest Territories, Canada

Jennifer Baltzer, Nicola Day, Alison White, Kirsten Reid, Geneviève Degré-Timmons, Steve Cumming, Michelle Mack, Merritt Turetsky, Xanthe Walker & Jill Johnstone
Climate change is altering disturbance regimes outside of historical norms, which can impact biodiversity by selecting for plants with particular traits. The relative impact of disturbance characteristics on plant traits and community structure may be mediated by environmental gradients. We aimed to understand how wildfire impacted understory plant communities and plant regeneration strategies along gradients of environmental conditions and wildfire characteristics in boreal forests. We established 207 plots (60m2) in recently burned stands and 133...

Data from: Local adaptation and rapid evolution of aphids in response to genetic interactions with their cottonwood hosts

David Smith, Stuart Wooley, Eric Lonsdorf, Sarah Brown, Thomas Whitham, Stephen Shuster & Richard Lindroth
Several studies have demonstrated the ecological consequences of genetic variation within a single plant species. For example, these studies show that individual plant genotypes support unique composition of the plants’ associated arthropod community. By contrast, fewer studies have explored how plant genetic variation may influence evolutionary dynamics in the plant’s associated species. Here, we examine how aphids respond evolutionarily to genetic variation in their host plant. We conducted two experiments to examine local adaptation and...

Environmental drivers of Sphagnum growth in peatlands across the Holarctic region

Fia Bengtsson, Håkan Rydin, Jennifer Baltzer, Luca Bragazza, Zhao-Jun Bu, Simon Caporn, Ellen Dorrepaal, Kjell Ivar Flatberg, Olga Galanina, Mariusz Gałka, Anna Ganeva, Irina Goia, Nadezhda Goncharova, Michal Hajek, Akira Haraguchi, Lorna Harris, Elyn Humphreys, Martin Jiroušek, Katarzyna Kajukało, Edgar Karofeld, Natalia Koronatova, Natalia Kosykh, Anna Laine, Mariusz Lamentowicz, Elena Lapshina … & Richard J. Payne
The relative importance of global versus local environmental factors for growth and thus carbon uptake of the bryophyte genus Sphagnum – the main peat-former and ecosystem engineer in northern peatlands – remains unclear. 2) We measured length growth and net primary production (NPP) of two abundant Sphagnum species across 99 Holarctic peatlands. We tested the importance of previously proposed abiotic and biotic drivers for peatland carbon uptake (climate, N deposition, water table depth, and vascular...

Data from: A unified framework for quantifying land carbon sequestration

Yiqi Luo, Yuanyuan Huang, Carlos Sierra & Jianyang Xia
Land ecosystems offer an effective nature-based solution to climate change mitigation by absorbing approximately 30% of anthropically emitted carbon. This absorption is primarily based on constraints from atmospheric and oceanic measurements while quantification from direct studies of the land carbon cycle itself displays great uncertainty. The latter hinders prediction of the future fate of the land carbon sink. Here, we show a unified framework for quantifying land carbon sequestration. The framework unifies all carbon cycle...

Predicting tropical tree mortality with leaf spectroscopy

Chris Doughty, Alexander Cheesman, Terhi Ruitta & Andrew Nottingham
Do tropical trees close to death have a distinct change to their leaf spectral signature? Tree mortality rates have been increasing in tropical forests globally, reducing the global carbon sink. Upcoming hyperspectral satellites could be used to predict regions close to experiencing extensive tree mortality during periods of stress, such as drought. Here we show, for a tropical rainforest in Borneo, how imminent tropical tree mortality impacts leaf physiological traits and reflectance. We measured leaf...

The last pteraspids (Agnatha, Heterostraci): New material from the Middle Devonian of Alberta and Idaho

David Elliott, Linda Sue Lassiter & Kathryn Geyer
This report documents the last pteraspids, (armored, jawless members of the Heterostraci), which are otherwise only known from the Early Devonian of the Old Red Sandstone Continent. Tuberculate pteraspid heterostracans are described from the Middle Devonian beds of two formations in western North America. The late Givetian Yahatinda Formation of Alberta and British Columbia consists of channels cut into lower Paleozoic rocks and represents deposition in marine to littoral environments. Clavulaspis finis new genus new...

Data from: Megafauna decline have reduced pathogen dispersal which may have increased emergent infectious diseases

Chris Doughty, Tomos Prys-Jones, Soren Faurby, Crystal Hepp, Viacheslav Fofanov, Andrew Abraham, Victor Leshyk, Nathan Nieto, Jens-Christian Svenning & Mauro Galetti
The Late Quaternary extinctions of megafauna (defined as animal species > 44.5 kg) reduced the dispersal of seeds and nutrients, and likely also microbes and parasites. Here we use body-mass based scaling and range maps for extinct and extant mammal species to show that these extinctions led to an almost seven-fold reduction in the movement of gut-transported microbes, such as Escherichia coli (3.3–0.5 km 2 d − 1 ). Similarly, the extinctions led to a...

Identifying functional impacts of heat-resistant fungi on boreal forest recovery after wildfire

Nicola Day, Steve Cumming, Kari Dunfield, Jill Johnstone, Michelle Mack, Kirsten Reid, Merritt Turetsky, Xanthe Walker & Jennifer Baltzer
Fungi play key roles in carbon (C) dynamics of ecosystems: saprotrophs decompose organic material and return C in the nutrient cycle, and mycorrhizal species support plants that accumulate C through photosynthesis. The identities and functions of extremophile fungi present after fire can influence C dynamics, particularly because plant-fungal relationships are often species-specific. However, little is known about the function and distribution of fungi that survive fires. We aim to assess the distribution of heat-resistant soil...

Priority determines tribolium competitive outcome in a food-limited environment

Aaron Smith & Zane Holditch
Flour beetles are a classic model system for studying competitive dynamics between species occupying the same ecological niche. Competitive performance is often interpreted in terms of biological species traits such as fecundity, resource use, and predation. However, many studies only measure competitive ability when species enter an environment simultaneously, and thus do not consider how the relative timing of species’ arrival may determine competitive outcome (i.e., priority effects). Whether priority effects may influence competition in...

Data from: Addition of nitrogen to canopy versus understory has different effects on leaf traits of understory plants in a subtropical evergreen broad–leaved forest

Songbo Tang, Lingling Zhang, Hans Lambers, Wendan Ren, Xiaofei Lu, Enqing Hou, Shenglei Fu & Yuanwen Kuang
Atmospheric nitrogen (N) deposition has substantial effects on forest ecosystems. The effects of N deposition on understory plants have been simulated by spraying N on the forest floor. Such understory addition of N (UAN) might simulate atmospheric N deposition in a biased manner, because it bypasses the canopy. We compared the effects of UAN and canopy addition of N (CAN) at 0, 25, and 50 kg N ha–1 year–1 on specific leaf area (SLA), leaf...

Registration Year

  • 2020

Resource Types

  • Dataset


  • Northern Arizona University
  • Wilfrid Laurier University
  • University of Wyoming
  • University of Edinburgh
  • Auckland University of Technology
  • CSIRO Ocean and Atmosphere
  • University of Oklahoma
  • University of Colorado Boulder
  • United States Geological Survey
  • Colorado State University