62 Works

Data from: Mechanisms and implications of a type IV functional response for short-term intake rate of dry matter in large mammalian herbivores

Jean C. Mezzalira, Olivier J. F. Bonnet, Paulo C. De F. Carvalho, Lidiane Fonseca, Carolina Bremm, Carlos C. Mezzalira & Emilio A. Laca
1. The functional response (i.e. the relationship between consumers’ intake rate and resource density) is central in plant-herbivore interactions. Its shape and the biological processes leading to it have significant implications for both foraging theory and ecology of grazing systems. 2. A type IV functional response (i.e. dome-shaped relationship) of short-term intake rate of dry matter (intake while grazing) has rarely been reported for large herbivores and the conditions that can lead to it are...

Data from: Interactive effects of predator and prey harvest on ecological resilience of rocky reefs

Robert P. Dunn, Marissa L. Baskett & Kevin A. Hovel
A major goal of ecosystem-based fisheries management is to prevent fishery-induced shifts in community states. This requires an understanding of ecological resilience: the ability of an ecosystem to return to the same state following a perturbation, which can strongly depend on species interactions across trophic levels. We use a structured model of a temperate rocky reef to explore how multi-trophic level fisheries impact ecological resilience. Increasing fishing mortality of prey (urchins) has a minor effect...

Data from: Early- and late-flowering guilds respond differently to landscape spatial structure

Jesse E.D. Miller, Anthony R. Ives, Susan P. Harrison, Ellen I. Damschen & Jesse E. D. Miller
1. Species with unique phenologies have distinct trait syndromes and environmental affinities, yet there has been little exploration of whether community assembly processes differ for plants with different phenologies. In this study, we ask whether early- and late-blooming species differ in the ways that dispersal, persistence, and resource-acquisition traits shape plant occurrence patterns in patchy habitats. 2. We sampled plant communities in 51 Ozark dolomite glade grasslands, which range in size from <1 ha to...

Data from: Form–function relationships in a marine foundation species depend on scale: a shoot to global perspective from a distributed ecological experiment

Jennifer L. Ruesink, John J. Stachowicz, Pamela L. Reynolds, Christoffer Boström, Mathieu Cusson, James Douglass, Johan Eklöf, Aschwin H. Engelen, Masakazu Hori, Kevin Hovel, Katrin Iken, Per-Olav Moksnes, Masahiro Nakaoka, Mary I. O'Connor, Jeanine L. Olsen, Erik E. Sotka, Matthew A. Whalen & Emmett J. Duffy
Form-function relationships in plants underlie their ecosystem roles in supporting higher trophic levels through primary production, detrital pathways, and habitat provision. For widespread, phenotypically-variable plants, productivity may differ not only across abiotic conditions, but also from distinct morphological or demographic traits. A single foundation species, eelgrass (Zostera marina), typically dominates north temperate seagrass meadows, which we studied across 14 sites spanning 32-61° N latitude and two ocean basins. Body size varied by nearly two orders...

Data from: Extensive genetic diversity is present within North American switchgrass germplasm

Joseph Evans, Millicent D. Sanciangco, Kin H. Lau, Emily Crisovan, Kerrie Barry, Chris Daum, Hope Hundley, Jerry Jenkins, Megan Kennedy, Govindarajan Kunde-Ramamoorthy, Brieanne Vaillancourt, Ananta Acharya, Jeremy Schmutz, Malay Saha, Shawn M. Kaeppler, E. Charles Brummer, Michael D. Casler & C. Robin Buell
Switchgrass (Panicum virgatum L.) is a perennial native North American grass present in two ecotypes: upland, found primarily in the northern range of switchgrass habitats, and lowland, found largely in the southern reaches of switchgrass habitats. Previous studies focused on a diversity panel of primarily northern switchgrass, so to expand our knowledge of genetic diversity in a broader set of North American switchgrass, exome capture sequence data were generated for 632 additional, primarily lowland individuals....

Data from: Ecology and genomics of an important crop wild relative as a prelude to agricultural innovation

Eric J. B. Von Wettberg, Peter L Chang, Fatma Başdemir, Noelia Carrasquila-Garcia, Lijalem Korbu, Susan M. Moenga, Gashaw Bedada, Alex Greenlon, Ken S. Moriuchi, Vasantika Suryawanshi, Matilde A Cordeiro, Nina V. Noujdina, Kassaye Negash Dinegde, Syed Gul Abbas Shah Sani, Tsegaye Getahun, Lisa Vance, Emily Bergmann, Donna Lindsay, Bullo Erena Mamo, Emily J. Warschefsky, Emmanuel Dacosta-Calheiros, Edward Marques, Mustafa Abdullah Yilmaz, Ahmet Murat Cakmak, Janna Rose … & Douglas R. Cook
Domesticated species are impacted in unintended ways during domestication and breeding. Changes in the nature and intensity of selection impart genetic drift, reduce diversity, and increase the frequency of deleterious alleles. Such outcomes constrain our ability to expand the cultivation of crops into environments that differ from those under which domestication occurred. We address this need in chickpea, an important pulse legume, by harnessing the diversity of wild crop relatives. We document an extreme domestication-related...

Data from: Marine subsidies change short-term foraging activity and habitat utilization of terrestrial lizards

Heather V. Kenny, Amber N. Wright, Jonah Piovia-Scott, Louie Yang, David A. Spiller, Thomas W. Schoener & Louie H. Yang
Resource pulses are brief periods of unusually high resource abundance. While population and community responses to resource pulses have been relatively well-studied, how individual consumers respond to resource pulses has received less attention. Local consumers are the first to respond to a resource pulse, and the form and timing of individual responses may influence how the effects of the pulse are transmitted throughout the community. Previous studies in Bahamian food webs have shown that detritivores...

Data from: Geographic patterns and pollination ecotypes in Claytonia virginica

Alison J. Parker, Neal M. Williams & James D. Thomson
Geographical variation in pollinators visiting a plant can produce plant populations adapted to local pollinator environments. We documented two markedly different pollinator climates for the spring ephemeral wildflower Claytonia virginica: in more northern populations, the pollen-specialist bee Andrena erigeniae dominated, but in more southern populations, A. erigeniae visited rarely and the bee-fly Bombylius major dominated. Plants in the northern populations experience faster pollen depletion than plants in southern populations. We also measured divergent pollen-related plant...

Data from: Environmental effects on fine-scale spatial genetic structure in four Alpine keystone forest tree species

Elena Mosca, Erica A. Di Pierro, Katharina B. Budde, David B. Neale & Santiago C. Gonzalez-Martinez
Genetic responses to environmental changes take place at different spatial scales. While the effect of environment on the distribution of species’ genetic diversity at large geographical scales has been the focus of several recent studies, its potential effects on genetic structure at local scales are understudied. Environmental effects on fine-scale spatial genetic structure (FSGS) were investigated in four Alpine conifer species (five to eight populations per species) from the eastern Italian Alps. Significant FSGS was...

Data from: Insights into the evolution, biogeography and natural history of the acorn ants, genus Temnothorax Mayr (Hymenoptera: Formicidae)

Matthew Prebus
Background: Temnothorax (Formicidae: Myrmicinae) is a diverse genus of ants found in a broad spectrum of ecosystems across the northern hemisphere. These diminutive ants have long served as models for social insect behavior, leading to discoveries about social learning and inspiring hypotheses about the process of speciation and the evolution of social parasitism. This genus is highly morphologically and behaviorally diverse, and this has caused a great deal of taxonomic confusion in recent years. Past...

Data from: Symbioses with nitrogen-fixing bacteria: nodulation and phylogenetic data across legume genera

Michelle E. Afkhami, D. Luke Mahler, Jean H. Burns, Marjorie G. Weber, Martin F. Wojciechowski, Janet Sprent & Sharon Y. Strauss
How species interactions shape global biodiversity and influence diversification is a central – but also data-hungry – question in evolutionary ecology. Microbially-based mutualisms are widespread and could cause diversification by ameliorating stress and thus allowing organisms to colonize and adapt to otherwise unsuitable habitats. Yet the role of these interactions in generating species diversity has received limited attention, especially across large taxonomic groups. In the massive angiosperm family Leguminosae, plants often associate with root-nodulating bacteria...

Vibrational Neutron Spectroscopy Data for Small Molecule Organic Semiconductors

Thomas Harrelson, Varuni Dantanarayana, Roland Faller & Adam Moule
Organic semiconductors are a class of molecules that self-assemble into materials that have semiconducting properties. Recently, they have generated a large amount of research interest due to their solution processability, mechanical flexibility, and conducting properties. Small molecule organic semiconductors are highly crystalline, which means molecular vibrations/phonons are the dominant factors affecting charge transport properties. A key to improving small-molecule semiconductors involves designing materials that minimize the effects of vibrations/phonons on charge transport. Vibrational neutron spectroscopy...

Images of individual strawberries (entire fruit, flesh and calyx) with contrasting background

Adrien Durand-Petiteville, Stavros Vougioukas, David Slaughter & Dennis Sadowski
This database contains images of 258 individual strawberries with dark background (a setting typically encountered during post-harvest operations). For each strawberry, six images are provided: 1) a color image of the entire strawberry; 2) a color image containing only the calyx of the strawberry; 3) a color image containing only the flesh of the strawberry; 4) a binary image of the entire strawberry; 5) a binary image of the calyx, and 6) a binary image...

Data from: The acacia ants revisited: convergent evolution and biogeographic context in an iconic ant/plant mutualism

Philip S. Ward & Michael G. Branstetter
Phylogenetic and biogeographic analyses can enhance our understanding of multispecies interactions by placing the origin and evolution of such interactions in a temporal and geographical context. We use a phylogenomic approach—ultraconserved element sequence capture—to investigate the evolutionary history of an iconic multispecies mutualism: Neotropical acacia ants (Pseudomyrmex ferrugineus group) and their associated Vachellia hostplants. In this system, the ants receive shelter and food from the host plant, and they aggressively defend the plant against herbivores...

Data from: A single migrant enhances the genetic diversity of an inbred puma population

Kyle C. Gustafson, T. Winston Vickers, Walter M. Boyce, Holly B. Ernest & Kyle D. Gustafson
Migration is essential for maintaining genetic diversity among populations, and pumas (Puma concolor) provide an excellent model for studying the genetic impacts of migrants on populations isolated by increasing human development. In densely populated southern California, USA, puma populations on the east and west side of interstate highway 15 (I-15) have become fragmented into a small inbred population on the west side (Santa Ana Mountains) and a relatively larger, more diverse population on the east...

Data from: Genetic sampling for estimating density of common species

Ellen Cheng, Karen E. Hodges, Rahel Sollmann & L. Scott Mills
Understanding population dynamics requires reliable estimates of population density, yet this basic information is often surprisingly difficult to obtain. With rare or difficult-to-capture species, genetic surveys from noninvasive collection of hair or scat has proved cost-efficient for estimating densities. Here, we explored whether noninvasive genetic sampling (NGS) also offers promise for sampling a relatively common species, the snowshoe hare (Lepus americanus Erxleben, 1777), in comparison with traditional live trapping. We optimized a protocol for single-session...

Data from: Humans permanently occupied the Andean highlands by at least 7 ka

Randall Haas, Ioana C. Stefenescu, Alex Garcia-Putnam, Mark S. Aldenderfer, Mark T. Clementz, Melissa S. Murphy, Carlos Viviano Llave, James T. Watson, Alexander Garcia-Putnam & Ioana C. Stefanescu
High-elevation environments above 2500 metres above sea level (m.a.s.l.) were among the planet's last frontiers of human colonization. Research on the speed and tempo of this colonization process is active and holds implications for understanding rates of genetic, physiological and cultural adaptation in our species. Permanent occupation of high-elevation environments in the Andes Mountains of South America tentatively began with hunter–gatherers around 9 ka according to current archaeological estimates, though the timing is currently debated....

Data from: The seasonal climate niche predicts phenology and distribution of an ephemeral annual plant, Mollugo verticillata

Joe Hereford, Johanna Schmitt & David D. Ackerly
1.Many short-lived species complete their life cycles during brief seasonal windows of favorable environmental conditions. Such species may persist in the face of climate warming by migration to track their seasonal climate niche in space and/or by phenological shifts to track favorable conditions in time within the year. To describe the seasonal climate niche of the short-lived annual Mollugo verticillata in California, we used data from herbarium specimens and historic climate records to estimate environmental...

Data from: Variance and variability, uncovering an underappreciated component of reproductive isolation

Joe Hereford
Estimating the fitness of line crosses has been a key element in studies of inbreeding depression, hybridization, and speciation. Fitness values are typically compared using differences in the arithmetic mean of a fitness component between types of crosses. One aspect of fitness that is often overlooked is variance in offspring fitness over time. In the majority of studies, ignoring this aspect of fitness is unavoidable because it is impossible to estimate variance in offspring fitness...

Data from: Is biotic resistance enhanced by natural variation in diversity?

James B. Grace, Susan Harrison & Howard Cornell
Theories linking diversity to ecosystem function have been challenged by the widespread observation of more exotic species in more diverse native communities. Few studies have addressed the underlying processes by dissecting how biotic resistance to new invaders may be shaped by the same environmental influences that determine diversity and other community properties. In grasslands with heterogeneous soils, we added invaders and removed competitors to analyze the causes of invasion resistance. Abiotic resistance was measured using...

Data from: Internet blogs, polar bears, and climate-change denial by proxy

Jeffrey A. Harvey, Daphne Van Den Berg, Jacintha Ellers, Remko Kampen, Thomas W. Crowther, Peter Roessingh, Bart Verheggen, Rascha J. M. Nuijten, Eric Post, Stephan Lewandowsky, Ian Stirling, Meena Balgopal, Steven C. Amstrup & Michael E. Mann
Increasing surface temperatures, Arctic sea-ice loss, and other evidence of anthropogenic global warming (AGW) are acknowledged by every major scientific organization in the world. However, there is a wide gap between this broad scientific consensus and public opinion. Internet blogs have strongly contributed to this consensus gap by fomenting misunderstandings of AGW causes and consequences. Polar bears (Ursus maritimus) have become a “poster species” for AGW, making them a target of those denying AGW evidence....

Data from: Self-fertilization and herbivory in a rare alpine plant in California, Claytonia megarhiza (Montiaceae)

Dena Grossenbacher, Ryan Briscoe Runquist & Joel Smith
Reproduction in alpine habitats is challenging because of the short growing season, low temperatures, and high winds. This predicts alternative strategies for sexual reproduction in plants: compensatory measures such as larger floral displays and greater floral longevity to attract scarce pollinators and maintain outcrossing, or high levels of autonomous self-fertilization to assure reproduction in the absence of reliable pollinators. Here, we assessed the roles of animals (crawling insects, flying insects, and vertebrates) on the reproductive...

Data from: Latitudinal variation in plant chemical defences drives latitudinal patterns of leaf herbivory

Xoaquón Moreira, Bastien Castagneyrol, Luis Abdala-Roberts, Jorge C. Berny-Mier Y Terán, Bart G. H. Timmermans, Hans Henrik Kehlet Bruun, Felisa Covelo, Gaétan Glauser, Sergio Rasmann, Ayco J. M. Tack & Hans Henrik Bruun
A long-standing paradigm in ecology holds that herbivore pressure and thus plant defences increase towards lower latitudes. However, recent work has challenged this prediction where studies have found no relationship or opposite trends where herbivory or plant defences increase at higher latitudes. Here we tested for latitudinal variation in herbivory, chemical defences (phenolic compounds), and nutritional traits (phosphorus and nitrogen) in leaves of a long-lived tree species, the English oak Quercus robur. We further investigated...

Data for analysis of snowmelt timing as a determinant of inflow mixing in Lake Tahoe

Derek Roberts, Shohei Watanabe & S. Geoffrey Schladow
This dataset includes data files pertinent to the manuscript, "Snowmelting timing as a determinant of inflow mixing," accepted for publication in Water Resources Research in January 2018. Included data were used for an analysis of relative stream-lake conditions as they pertain to winter climate conditions and the subsequent mixing of snowmelt inflows into the lake. Included with each of the six files listed below is a [FILENAME]_Reference.txt file with details on data collection, curation, and...

Data from: Sympatric, temporally isolated populations of the pine white butterfly Neophasia menapia, are morphologically and genetically differentiated

Katherine L. Bell, Christopher A. Hamm, Arthur M. Shapiro & Chris C. Nice
Temporal isolation remains an understudied, and potentially under-appreciated, mechanism of reproductive isolation. Phenological differences have been discovered in populations of the pine white butterfly (Neophasia menapia), a typically univoltine species found throughout western North America. At two locations in the Coast Range of California there are two periods of adult emergence per year, one in early summer (July) and one in late summer/autumn (September/October). Differences in flight time are accompanied by differences in wing shape...

Registration Year

  • 2017
    62

Resource Types

  • Dataset
    62

Affiliations

  • University of California, Davis
    62
  • University of Wyoming
    5
  • United States Geological Survey
    4
  • Michigan State University
    4
  • University of Georgia
    3
  • University of California, Berkeley
    3
  • University of Wisconsin-Madison
    3
  • Colorado State University
    3
  • Victoria University of Wellington
    2
  • University of Montana
    2