نتایج جستجو برای: aquatic birds
تعداد نتایج: 73493 فیلتر نتایج به سال:
Influenza H9N2 subtype viruses and their reassortants (such as H7N9) are posing increasing threats to birds and humans in China. During 2009-2013, multiple novel subtype viruses with H9N2 original genes emerged in China. Yet, the genetic evolution of H9N2 viruses in various host organisms in China has not been systematically investigated since 2009. In the present study, we performed large-scal...
A wide range of pharmaceuticals and endocrine disrupting compounds enter freshwaters globally. As these contaminants are transported through aquatic food webs, understanding their impacts on both terrestrial ecosystems remains a major challenge. Here, we provide the first direct evidence transfer disruptors aquatic-terrestrial habitat linkage by emerging insects. We also show that type insect m...
Ecological divergence is thought to be coupled with evolutionary radiations, yet the strength of this coupling is unclear. When birds diversified ecologically has received much less attention than their hotly debated crown divergence time. Here, we quantify how accurately skeletal morphology can predict ecology in living and extinct birds, and show that the earliest known assemblage of birds (=...
Abstract Aquatic birds show a great diversity of locomotion styles and wing morphologies, from penguins that are fully specialized for an aquatic life to species aerial flyers also use their wings underwater propulsion (e.g. auks shearwaters). Moving between the air–water interface exerts conflicting pressures on body anatomy diving birds. In this work, we investigated functional morphology for...
Reexamination of Herpetofauna on Mormon Island, Hall County, Nebraska, with Notes on Natural History
7 Introduction Many grasslands along rivers in the Great Plains have been converted to agricultural lands during the last century (Sidle et al., 1989) or lost to woody encroachment due to suppression of wildfires and alterations to hy-The Platte River valley in central Nebraska is an important migratory stopover site for waterfowl (Sharpe et al. portions of the river designated as critical habi...
Schistosomatidae are an actively studied ecological group of trematodes. Their ability to cause various parasitic diseases in animals and humans makes them interesting object study for a number research centres worldwide. One the commonest species this is Bilharziella polonica (Kowalewsky, 1895), whose mature stages have been recorded aquatic semi-aquatic birds Uzbekistan. Our team established ...
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