12 Works

Growth and flowering responses of eelgrass to simulated grazing and fecal addition by brant geese

Daniel Barton, Frank Shaughnessy, Susannah Ferson, Adam Frimodig, Matthew Hurst & Jeffrey Black
These data represent the responses of eelgrass (Zostera marina) beds to a series of experimental treatments conducted in 2004 and 2005 in the vicinity of Hookton Channel, Humboldt Bay, California, USA. We measured eelgrass density, growth, biomass, and flowering as the primary response variables to clipping, brant (Branta bernicla) fecal addition, clipping and fecal addition, and control treatments in a 2004 destructively sampled randomized block design meant to simulate different effects of brant grazing and...

Admixture may be extensive among hyperdominant Amazon rainforest tree species

Drew Larson, Oscar Vargas, Alberto Vicentini & Christopher W. Dick
Admixture is a mechanism by which species of long-lived plants may acquire novel alleles. However, the potential role of admixture in the origin and maintenance of tropical plant diversity is unclear. We ask whether admixture occurs in an ecologically important clade of Eschweilera (Parvifolia clade, Lecythidaceae), which includes some of the most widespread and abundant tree species in Amazonian forests. Using target capture sequencing, we conducted a detailed phylogenomic investigation of 33 species in the...

Predicted distribution of a rare and understudied forest carnivore: Humboldt martens (Martes caurina humboldtensis)

Katie Moriarty, Joel Thompson, Matthew Delheimer, Brent Barry, Mark Linnell, Taal Levi, Keith Hamm, Desiree Early, Holly Gamblin, Micaela Szykman-Gunther, Jordan Ellison, Janet Prevey, Jennifer Hartman & Raymond Davis
Many mammalian species have experienced range contractions. Following a reduction in distribution that has resulted in apparently small and disjunct populations, the Humboldt marten (Martes caurina humboldtensis) was recently designated as federally Threatened and state Endangered. This subspecies of Pacific marten occurring in coastal Oregon and northern California, also known as coastal martens, appear unlike martens that occur in snow-associated regions in that vegetation associations appear to differ widely between Humboldt marten populations. We expected...

Data from: Palynology of a short sequence of the Lower Devonian Beartooth Butte Formation at Cottonwood Canyon (Wyoming): Age, depositional environments and plant diversity

Alexandru Tomescu, Sol Noetinger & Alexander Bippus
The Beartooth Butte Formation hosts the most extensive Early Devonian macroflora of western North America. The age of the flora at Cottonwood Canyon (Wyoming) has been constrained to the Lochkovian-Pragian interval, based on fish biostratigraphy and unpublished palynological data. We present a detailed palynological analysis of the plant-bearing layers at Cottonwood Canyon. The palynomorphs comprise 32 spore, five cryptospore, two prasinophycean algae and an acritarch species. The stratigraphic ranges of these palynomorphs indicate a late...

Au croisement du nouchi et du coupé-décalé : un défi à l’appartenance nationale

Marie STOLL
Most scholars dealing with nouchi perceive it as a means of expressing the Ivoirian identity, or even as a vector for national unity, given that it is used today in various contexts, regardless of the social status of its speakers. However, this thesis seems contradictory to the cultural reality of the country, characterized by its ethnic, linguistic and socio-economic multiplicity, but it also ingores the origin of nouchi, which is above all an urban slang...

Data from: Insectivorous bat occupancy is mediated by drought and agricultural land use in a highly modified ecoregion

Trinity Smith, Brett Furnas, Misty Nelson, Daniel Barton & Barbara Clucas
Abstract Aim California’s Central Valley, one of the most productive agricultural regions worldwide, is home to a high number of at-risk species due to habitat conversion. Amplifying the issue, the Central Valley faces severe droughts, creating water scarcity in surrounding natural areas. At least 14 insectivorous bat species live in this region, and prior studies show mixed results regarding the impact of agriculture and drought on bats. The aim of this study was to investigate...

Scaling and development of elastic mechanisms: the tiny strikes of larval mantis shrimp

Jacob Harrison, Megan Porter, Matthew McHenry, H. Eve Robinson & Sheila Patek
Latch-mediated spring actuation (LaMSA) is used by small organisms to produce high acceleration movements. Mathematical models predict that acceleration increases as LaMSA systems decrease in size. Adult mantis shrimp use a LaMSA mechanism in their raptorial appendages to produce extremely fast strikes. Until now, however, it was unclear whether mantis shrimp at earlier life-history stages also strike using elastic recoil and latch mediation. We tested whether larval mantis shrimp (Gonodactylaceus falcatus) use LaMSA and, because...

Mast seeding records in North American Pinaceae and summer temperature data (1960-2014)

Jalene LaMontagne, Miranda Redmond, Andreas Wion & David Greene
Mast seeding database compilation for conifer tree reproduction in North America (belonging to genus: Abies, Picea, Pinus, Tsuga). All data included in analyses met the criteria that they: i) had at least 6 years of mast seeding data for a species of coniferous tree in North America, ii) data were collected on a continuous scale (e.g., based on seed traps, visual cone counts, or cone scars), iii) occurred between 1960-2014, and iv) for a taxon...

Drought and coyotes mediate mesopredator response to human disturbance

Molly Parren
Mesopredators in western North America are facing major changes to their ecosystems, including drought and the expansion of human disturbance. To balance resource needs and risk-taking on the landscape, mesopredators are likely shifting their habitat use as well as their interspecies interactions. As part of a large-scale study to help evaluate responses of terrestrial wildlife to severe drought, the California Department of Fish and Wildlife surveyed mesopredator presence across 585 sites in the Mojave Desert...

Large herbivores facilitate an insect herbivore by modifying plant community composition in a temperate grassland

Xiaofei Li, Shengnan Wang, Chelse Prather, Ho Yi Wan, Hui Zhu, Petri Nummi, Moshe Inbar, Qiang Gao, Deli Wang & Zhiwei Zhong
Large herbivores often co-occur and share plant resources with herbivorous insects in grassland ecosystems, yet how they interact with each other remains poorly understood. We conducted a series of field experiments to investigate whether and how large domestic herbivores (sheep; Ovis aries) may affect the abundance of a common herbivorous insect (aphid; Hyalopterus pruni) in a temperate grassland of northeast China. Our exclosure experiment showed that three years (2010-2012) of sheep grazing had led to...

TNT file for phylogenetic analysis of the moss class Polytrichopsida composed of morphological and sequence level characters

Jaakko Hyvönen, Jorge Flores, Neil Bell, Alexander Bippus & Alexandru Tomescu
PREMISE OF THE STUDY: When fossils are sparse in morphologically divergent lineages, phylogenetic analyses based on morphology may support hypotheses of relationships incongruent with those supported by gene sequence data. Integration of morphological and sequence data from conservative gene regions may reconcile such situations by circumscribing the search space of combined analyses. METHODS: We revisited the phylogeny of Polytrichopsida, a highly divergent group of mosses, in parsimony analyses. We supplemented the existing morphological matrix with...

Ectomycorrhizal fungal community assembly on seedlings of a Neotropical monodominant tree

Carolyn Delevich, Rachel Koch, M. Catherine Aime & Terry Henkel
Ectomycorrhizal tree species may benefit from positive plant-soil feedbacks, where soil environments near adult trees enhance conspecific seedling growth and survival. In tropical monodominant forests seedling survival is particularly important, as seedling banks help maintain stand-level dominance over generations. Positive plant-soil feedbacks may be mediated by diverse ectomycorrhizal fungal communities, which improve nutrient acquisition of heavily shaded seedlings. Despite the potential importance of these fungi, little is known about ectomycorrhizal fungal community development on seedlings...

Registration Year

  • 2021
    12

Resource Types

  • Dataset
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  • Journal Article
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Affiliations

  • Humboldt State University
    12
  • Oregon State University
    3
  • University of Helsinki
    2
  • Bernardino Rivadavia Natural Sciences Museum
    1
  • Duke University
    1
  • United States Department of Agriculture
    1
  • University of Hawaii at Manoa
    1
  • National Institute of Amazonian Research
    1
  • University of Dayton
    1
  • Purdue University
    1