Works in North America
Published research works with metadata for North America (Continent).
1165 works
Showing 701 to 750 of 1165 works
Transatlantic disjunction in fleshy fungi III: Gymnopus confluens
Phylogeographic data indicate that DNA differences consistently exist between the North American and European allopatric populations of Gymnopus confluens. Conversely, pairing exp…
Two new species of Ramaria from Arkansas
Two species of Ramaria from the Ozark region of Arkansas, USA, R. admiratia and R. calvodistalis, are proposed as new. They are described morphologically and placed molecularly wi…
Cortinarius bovarius (Agaricales), a new species from western North America
Cortinarius bovarius sp. nov., a conifer associated taxon growing on calcareous ground, is described from western North America. Phylogenetic relationships and species limits were…
DNA barcode identification of lichen-forming fungal species in the Rhizoplaca melanophthalma species-complex (Lecanoral…
Recent studies using sequence data from multiple loci and coalescent-based species delimitation have revealed several species-level lineages within the phenotypically circumscribe…
Five species of Candelaria and Candelariella (Ascomycota, Candelariales) new to Switzerland
Candelaria pacifica, Candelariella antennaria, C. boleana, C. granuliformis and C. xanthostigmoides are reported from Switzerland for the first time. Candelariella xanthostigmoide…
Functional trait responses of emergent and free-floating Alternanthera philoxeroides to increasing salinity with sea le…
Sea level rise is having major impacts on estuaries due to salinity intrusion. These changes in stress profiles have ripple effects in ecosystems, including altering the invasibil…
Native and invasive raccoon populations host distinct microbiomes that may facilitate invasion
While microbiome associations are known to impact species survival, the extent to which microbiome variation aids in invasion dynamics is largely unknown. Here, we studied the mic…
Invaders break assembly rules to beat the natives: how cheatgrass cheats
Understanding how some introduced plants achieve invasive status while most simply become naturalized is a fundamental question in invasion ecology. Traditional approaches compari…
Experimental evidence of negative agricultural impacts and effectiveness of mitigation strategies of invasive green igu…
Losses in crop yield due to invasive insects, weeds, pathogens, and herbivores cost trillions of dollars per year globally. To prevent further spread of invasive agricultural pest…
Rising temperatures may increase fungal epizootics in northern populations of the invasive spongy moth in North America
Insect pest species are generally expected to become more destructive with climate change because of factors such as weakened host tree defences during droughts and increased volt…
Effects of earthworm invasion on soil properties and plant diversity after two years of field experiment
Although belowground invasive species are probably equally widespread and as important as their aboveground counterparts, they remain understudied, and their impacts are likely to…
Variation in root traits and phenotypic plasticity between native and introduced populations of the invasive plant Chro…
Understanding intraspecific trait variations, particularly for invasive species that occupy large geographic areas with different resource conditions, can enhance our understandin…
Substrate complexity reduces prey consumption in functional response experiments: Implications for extrapolating to the…
Understanding the density-dependent impacts of an invasive predator is integral for predicting potential consequences for prey populations. Functional response experiments are use…
Predation risk by largemouth bass modulates feeding functional responses of native and non-native crayfish
Context-dependency is prevalent in nature, challenging our understanding and prediction of the potential ecological impacts of non-native species (NNS). The presence of a top pred…
Population level interactions between an invasive woodwasp, an invasive nematode and a community of native parasitoids
Parasitic nematodes and hymenopteran parasitoids have been introduced and used extensively to control invasive Eurasian Sirex noctilio woodwasps in pine plantations in the Souther…
Effects of the invasive leafy spurge (Euphorbia esula L.) on plant community structure are altered by management histo…
Invasive species threaten biodiversity and ecosystem functioning, often causing changes in plant community composition and, thus, the functional traits of that community. Quantify…
Evidence of plant-soil feedback in South Texas grasslands associated with invasive Guinea grass
Plant-soil feedback (PSF) processes play an integral role in structuring plant communities. In native grasslands, PSF has a largely negative or stabilizing effect on plant growth …
Variation in plant traits and phylogenetic structure associated with native and nonnative species in an industrialized…
Industrialized sites are hotspots for nonnative species because of continuous anthropogenic disturbance and nonnative propagule rain resulting from hitchhikers exchanged through g…
Demography of an invading forest insect reunited with hosts and parasitoids from its native range
The Sirex woodwasp Sirex noctilio Fabricius (Hymenoptera: Siricidae), a widespread invasive pest of pines in the Southern Hemisphere, was first detected in North America in 2004. …
Using leaf functional traits to remotely detect Cytisus scoparius (Linnaeus) Link in endangered savannahs
Identification of invasive plant species must be accurate and timely for management practices to be successful. Currently, Cytisus scoparius (Scotch broom) is expanding unmonitore…
Mate choice errors may contribute to slow spread of an invasive Eurasian longhorn beetle in North America
Tetropium fuscum (Coleoptera: Cerambycidae) is a Eurasian longhorn beetle and forest pest that first became invasive to Nova Scotia, Canada around 1990. In the time since its intr…
Diversity of alien roadside herbs along an elevational gradient in western Mexico
Growing numbers of alien plant species threaten natural ecosystems worldwide. Mexico, as a megadiverse country, has lower numbers of alien species than other regions in America. H…
Climate change and micro-topography are facilitating the mountain invasion by a non-native perennial plant species
Mountainous areas and their endemic plant diversity are threatened by global climate change and invasive species. Mountain plant invasions have historically been minimal, however,…
Urban host plant utilisation by the invasive Halyomorpha halys (Stål) (Hemiptera, Pentatomidae) in northern Utah
The invasive and highly polyphagous brown marmorated stink bug, Halyomorpha halys (Stål), is a severe agricultural and urban nuisance pest in North America. Since its initial inva…
Invasive plant benefits a native plant through plant-soil feedback but remains the superior competitor
Plant soil feedback (PSF) occurs when a plant modifies soil biotic properties and those changes in turn influence plant growth, survival or reproduction. These feedback effects ar…
Is biocontrol efficacy rather driven by the plant or the antagonist genotypes? A conceptual bioassay approach
In the new range, invasive species lack their specialist co-evolved natural enemies, which then might be used as biocontrol agents. Populations of both a plant invader in the intr…
Taxonomy, morphology and cytology of Micranthes virginiensis (Michaux) Small (Saxifragales, Saxifragaceae), new chromos…
Micranthes virginiensis (Saxifragaceae) is an herbaceous, flowering plant species native to eastern North America with a range extending from the Gulf of Mexico into Canada. This …
A nomenclator of Drymaria (Caryophyllaceae)
Drymaria (Caryophyllaceae) is here considered to contain 56 species plus 19 infraspecific taxa, excluding autonyms. In the current study, all effectively published names of Drymar…
A new nothogenus and nothospecies in the Zygopetalinae (Orchidaceae), with a note on euglossine pollination in the subt…
Natural hybridization in Neotropical orchids is summarized, and the frequency of nothogenera in the subtribe Zygopetalinae is highlighted. A new nothogenus discovered in Costa Ric…
Vascular plants of east-central Baffin Island, Nunavut, Canada: an annotated checklist of a mid-Arctic flora
Baffin Island in the eastern Canadian Arctic is the largest island in Canada and the fifth largest in the world. East-central Baffin Island, a spectacular mountainous area coverin…
Three new species of Pleurothallis (Orchidaceae) from Costa Rica and Panama, with a note on asexual reproduction by pro…
Three new species of Pleurothallis, each exhibiting prolific vegetative growth, are described from Costa Rica and western Panama. Prolification refers to the development of a vege…
Taxonomic clarifications, a new combination, and three new species of Neotropical Rinorea (Violaceae)
Based on findings of revisionary studies of Neotropical Rinorea, we propose several taxonomic novelties and clarifications in this study, including the description of three new sp…
A new species of Begonia (Begoniaceae) from the eastern mountains of Panama
Begonia chucantiensis sp. nov. is described as a new species of Begonia section Lepsia from Cerro Chucantí, Darién Province, in eastern Panama. A study of the literature and herba…
Pollen and morphometric analysis reveal Solanum tavinuuyuku (Solanaceae), a new dioecious species from Mesoamerican Sol…
Solanum tavinuuyuku, of the Sierra Madre del Sur ecoregion of South-Central Mexico, is a viny, node-rooting species of the Potato clade, in the subclade Solanum sect. Anarrhichome…
A synopsis of Christiana DC. (Malvaceae, Brownlowioideae), with a new species from the Brazilian Atlantic Forest
A taxonomic synopsis is provided for the genus Christiana, with emphasis on the American species. Full synonymies, typifications, comments about distribution, and notes on main di…
Two new species of Ocotea (Lauraceae) with clustered leaves from the Uxpanapa region, Mexico
Two new species of Ocotea (Lauraceae) from Southern Mexico are described and illustrated. Based on their floral morphology, vegetative indument, and micromorphological attributes,…
Investigating a hybrid mixed population leads to recognizing a new species of Arctostaphylos (Ericaceae)
While investigating the potential for Arctostaphylos species to hybridize in the mixed populations of Point Sal and Burton Mesa in Santa Barbara County, California, we discovered …
Cryptantha acrimuricata (Boraginaceae), a distinctive new taxon of series Muricatae
In the process of studying the species Cryptantha muricata and its varieties, we discovered a unique taxon of the genus that resembles C. muricata but differs in having a mostly d…
Two new species of Salvia (Lamiaceae) from the dry forests of Dominican Republic
We describe two new species of Salvia from the Antillean dry forests, belonging to Salvia section Urbania. These species’ names honor two Latin American botanists who have advance…
Reinstatement of Struthanthus venetus (Loranthaceae): an endemic species of central Mexico
Struthanthus Mart. is a challenging genus because the abundance of reproductively incomplete specimens (lacking mature pistillate and staminate flowers and fruit) has inspired the…
Cryptantha whippleae (Boraginaceae), a new serpentine-adapted species endemic to northern California, U.S.A.
Cryptantha whippleae D.A.York & M.G.Simpson (Boraginaceae) is described as new. This species is currently known to occur in serpentine barrens in the Shasta-Trinity National Fores…
Seven new species of Rinorea (Violaceae) from the Neotropics
Over the course of revising the genus Rinorea (Violaceae) from Colombia, field observations and herbarium studies revealed seven new species. Several of the new species described …
The first epiphytic species of Valeriana in the world: Valeriana rudychazaroi (Caprifoliaceae)
The currently known species of Valeriana are herbs, shrubs, small trees and vines. After 20 years without new species of Valeriana in Mexico, here is described and illustrated the…
A new species of Casearia Jacq. (Salicaceae) from Central Panama and insights into its phylogenetic position within the…
We describe here a new species of Casearia from Panama based on both morphological and molecular data. Casearia isthmica sp. nov. is restricted to the mid-elevation cloud forests …
Eugenia sarahchazaroi (Myrtaceae, Myrteae), a new species from the cloud forest of Mexico
Following the description of Eugenia naraveana in 2016 from the cloud forest of the Cofre de Perote volcano, Mexico, the doubt about the existence of another unlocalized and sympa…
Gesneria tuberifera (Gesneriaceae), a new lithophytic species from the Sierra de Bahoruco, Barahona Peninsula of south…
A narrowly endemic new species of Gesneria is described from the Sierra de Bahoruco in the Dominican Republic’s Barahona Peninsula of southern Hispaniola. Gesneria tuberifera J.L.…
Revision of the genus Agrostis (Poaceae, Pooideae, Poeae) in Megamexico
Agrostis is one of the most diverse genera of the Poaceae, including ca. 198 species, principally distributed in cold and temperate regions of the world, but also found in the hig…
Desmopsis terriflora, an extraordinary new species of Annonaceae with flagelliflory
Flagelliflory refers to the production of inflorescences exclusively on long, whip-like branches which emerge from the main trunk and extend along the ground or below it. It is th…
A note on the type of Harpalyce (Fabaceae, Brongniartieae), with description of two new local endemic species from Cuba
Two new species of Harpalyce are described from Cuba, H. revoluta sp. nov. from a serpentine area in the northern part of E. Cuba and H. marianensis sp. nov. from calcareous areas…
A new species of Struthanthus Mart. (Loranthaceae) from Oaxaca, Mexico
Struthanthus ibe-dzi sp. nov. is a new species described and illustrated from the cloud and pine-oak forests of the Sierra Madre del Sur in Oaxaca, Mexico. This species shares sim…