Results 11 to 20 of about 166,698 (288)

Host Plant Species Influences the Composition of Milkweed and Monarch Microbiomes

open access: yesFrontiers in Microbiology, 2022
Plants produce defensive chemicals for protection against insect herbivores that may also alter plant and insect associated microbial communities.
Thorsten E. Hansen, Laramy S. Enders
doaj   +1 more source

Use of Spotted Knapweed/Star Thistle (Asterales: Asteraceae) as the Primary Source of Nectar by Early Migrating Monarch Butterflies (Lepidoptera: Nymphalidae) from Beaver Island, Michigan [PDF]

open access: yes, 2019
Recent observations over the past decade suggest that the invasive star thistle (aka spotted knapweed (Centaurea stoebe L.) provides much of the nectar that supports monarch butterflies (Danaus plexippus) in their pre-migratory and early migratory flight
Douglas, Matthew M
core   +2 more sources

Preventing a Risk/Risk Trade-off: An Analysis of the Measures Necessary to Increase U.S. Pollinator Numbers [PDF]

open access: yes, 2017
This Note will proceed in four parts. Part II will discuss the importance of pollinators and the possible reasons for their declining numbers. Part III will delve into the current and proposed actions to increase pollinator populations that are taking ...
Acchiardo Vallejo, Camila
core   +2 more sources

Modeling Current and Future Potential Distributions of Milkweeds and the Monarch Butterfly in Idaho

open access: yesFrontiers in Ecology and Evolution, 2019
Monarch butterflies (Danaus plexippus) are widespread in North America but have experienced large rangewide declines. Causes of recent declines likely involve multiple biotic and abiotic stressors including climate change and loss and degradation of ...
Leona K. Svancara   +2 more
doaj   +1 more source

Does Nature Need Cities? Pollinators Reveal a Role for Cities in Wildlife Conservation

open access: yesFrontiers in Ecology and Evolution, 2019
It is well-established that cities need nature for critical ecosystem services—from storing carbon, to reducing temperatures, to mitigating stormwater—and there is growing momentum to seek out strategies for how these services can intersect with urban ...
Abigail Derby Lewis   +8 more
doaj   +1 more source

Current Novel Advances in Bronchoscopy

open access: yesFrontiers in Surgery, 2020
Screening for lung cancer has changed substantially in the past decade since The National Lung Screening Trial. The resultant increased discovery of incidental pulmonary nodules has led to a growth in the number of lesions requiring tissue diagnosis ...
Jeffrey Jiang   +4 more
doaj   +1 more source

Pesticide Contamination of Milkweeds Across the Agricultural, Urban, and Open Spaces of Low-Elevation Northern California

open access: yesFrontiers in Ecology and Evolution, 2020
Monarch butterflies (Danaus plexippus) are in decline in the western United States and are encountering a range of anthropogenic stressors. Pesticides are among the factors that likely contribute to this decline, although the concentrations of these ...
Christopher A. Halsch   +5 more
doaj   +1 more source

The Red Admiral butterfly (Vanessa atalanta, Lepidoptera: Nymphalidae) is a true seasonal migrant: an evolutionary puzzle resolved?

open access: yesEuropean Journal of Entomology, 2003
Ornithologists in Finland recorded the autumn migration of the Red Admiral butterfly, Vanessa atalanta (L.). In the best year, 1998, 1240 migrants were counted from a bird tower in September.
Kauri MIKKOLA
doaj   +1 more source

Kant’s fundamental idea of state and law in Pushkin’s Boris Godunov [PDF]

open access: yesКантовский сборник, 2016
The tragedy Boris Godunov occupies a unique place in A. S. Pushkin’s oeuvre. It was a turning point, when the author needed the whole power of his poetical genius, when a work beyond traditional literary and aesthetic styles, which interchange and ...
Kalinnikov L.
doaj   +1 more source

Learning and the Value of Relationships in International Trade [PDF]

open access: yes, 2016
How valuable are long-term supplier relationships? To address this question, this paper explores relationships between U.S. importers and their suppliers abroad. We first establish several facts: almost half of U.S.
Monarch, Ryan, Schmidt-Eisenlohr, Tim
core   +1 more source

Home - About - Disclaimer - Privacy