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Articles 91 - 100 of 100
Full-Text Articles in Life Sciences
Increasing Interest In Parasitology At The Past Three International Mammalogical Congresses Held In 1997, 2001 And 2005: Mammals, Parasites, Zoonoses And Biodiversity, Scott Lyell Gardner, Mitsuhiko Asakawa, Luis A. Ruedas, Kenichi Takahashi
Increasing Interest In Parasitology At The Past Three International Mammalogical Congresses Held In 1997, 2001 And 2005: Mammals, Parasites, Zoonoses And Biodiversity, Scott Lyell Gardner, Mitsuhiko Asakawa, Luis A. Ruedas, Kenichi Takahashi
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
We summarized the data from the past three TTC (now IMC) meetings to examine the potential trends in presentation of parasites of mammals at the meeting. The lists include titles and authors of papers given in symposia, poster sessions, and oral presentations related to diseases, zoonoses, parasites, and causative agents of diseases of sylvatic mammals. Our analysis shows that there has been an increase in the number of papers (from 2.8% in 1997 to 5.1% in 2005) presented at the International Mammalogical Meetings. We also show that there are potentially more than 27,000 species of parasites (broadly defined) currently inhabiting …
Predicting Plant Extinction Based On Species-Area Curves In Prairie Fragments With High Beta Richness, Brian J. Wilsey, Leanne M. Martin, H. Wayne Polley
Predicting Plant Extinction Based On Species-Area Curves In Prairie Fragments With High Beta Richness, Brian J. Wilsey, Leanne M. Martin, H. Wayne Polley
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Species-area relationships and island biogeography theory are commonly used to predict how species richness will decline with fragmentation. There are a variety of largely untested assumptions in these approaches, including the assumptions that populations are distributed uniformly before fragmentation, and that local extinctions are due to effects of small population sizes. If populations are not distributed uniformly, then populations can be abundant locally but rare globally. This would cause extinction rates to be smaller than predicted.We tested extinction theory by developing estimates of the number of plant species that should be present in small tallgrass prairie fragments and then testing …
Butterflies Of The North Okanagan, British Columbia, Canada, David L. Threatful
Butterflies Of The North Okanagan, British Columbia, Canada, David L. Threatful
The Taxonomic Report of the International Lepidoptera Survey
An annotated list of 106 species of butterflies known to occur in the north Okanagan area of British Columbia, Canada is presented. Information is provided on flight phenology, elevation and habitat for each species. Field work over the past 100 years shows that this is one of the premiere areas in Canada for butterfly species diversity. More than one third of all known Canadian butterflies have been found in this small area.
Species Richness, Latitude, And Scale-Sensitivity, S. Kathleen Lyons, Michael R. Willig
Species Richness, Latitude, And Scale-Sensitivity, S. Kathleen Lyons, Michael R. Willig
School of Biological Sciences: Faculty Publications
The latitudinal gradient of species richness is well documented for a variety of taxa in both terrestrial and aquatic environs. Moreover, a number of recent attempts to assess the effects of scale on the relationship have concluded that the latitudinal pattern is scale-invariant. Nonetheless, the power of those approaches is predicated on precise knowledge of the forms of the latitudinal gradient, the area relationship, and their interaction. We used a model developed by J. Pastor, A. Downing, and H. E. Erickson for assessing the effects of scale on the productivity–diversity gradient to avoid such complications. More specifically, for 253 sets …
Worms, Nematoda, Scott Lyell Gardner
Worms, Nematoda, Scott Lyell Gardner
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Nematodes are the most speciose phylum of metazoa on earth. Not only do they occur in huge numbers as parasites of all known animal groups, but also they are found in the soils, as parasites of plants, and in large numbers in the most extreme environments, from the Antarctic dry valleys to the benthos of the ocean. They are extremely variable in their morphological characteristics, with each group showing morphological adaptations to the environment that they inhabit. Soil-dwelling forms are extremely small; many marine species have long and complex setae; and parasitic species manifest amazingly great reproductive potential and large …
Biodiversity And Decomposition In Experimental Grassland Ecosystems, Johannes M. H. Knops, David A. Wedin, David Tilman
Biodiversity And Decomposition In Experimental Grassland Ecosystems, Johannes M. H. Knops, David A. Wedin, David Tilman
School of Biological Sciences: Faculty Publications
We examined the impact of biodiversity on litter decomposition in an experiment that manipulated plant species richness. Using biomass originating from the experimental species richness gradient and from a species used as a common substrate, we measured rates of decomposition in litterbags in two locations: in situ in the experiment plots and in an adjacent common garden. This allowed us to separate the effects of litter quality and decomposition location on decomposition. We found that plant species richness had a significant, but minor negative effect on the quality (nitrogen concentration) of the biomass. Neither litter type nor location had a …
Ec98-787 Glossary Of Ecosystem Terms, Thomas G. Franti, R. Herpel, G.R. Lingle
Ec98-787 Glossary Of Ecosystem Terms, Thomas G. Franti, R. Herpel, G.R. Lingle
University of Nebraska-Lincoln Extension: Historical Materials
This extension circular contains ecosystem definitions from abiotic to wildlife refuge.
A New Pinworm, Didelphoxyuris Thylamisis N. Gen., N. Sp. (Nematoda: Oxyurida) From Thylamys Elegans (Waterhouse, 1839) (Marsupialia: Didelphidae) In Bolivia, Scott Lyell Gardner, Jean-Pierre Hugot
A New Pinworm, Didelphoxyuris Thylamisis N. Gen., N. Sp. (Nematoda: Oxyurida) From Thylamys Elegans (Waterhouse, 1839) (Marsupialia: Didelphidae) In Bolivia, Scott Lyell Gardner, Jean-Pierre Hugot
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Didelphoxyuris thylamisis n. gen., n. sp. is described from the caecum of Thylamys elegans (Waterhouse, 1839) (Marsupialia: Didelphidae) collected in the eastern region of the Andes of Bolivia. Didelphoxyuris thylamisis n. sp. differs from the only pinworm described from marsupials in the Neotropics (Neohilgertia venusti Navone, Suriano et Pujol, 1990) in having only three oesophageal teeth, non-operculated eggs, females that are didelphic, and males that possess no preanal papillae. Several other species of pinworms have been described from marsupials in Australia, but all are characterized by possessing a buccal capsule that is strongly cuticularized with inter-radial lamellae. These structures …
Parasites As Probes For Biodiversity, Scott Lyell Gardner, Mariel L. Campbell
Parasites As Probes For Biodiversity, Scott Lyell Gardner, Mariel L. Campbell
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Cestodes of the genus Linstowia, parasitic in marsupials, show patterns of coevolution and ancient historical-ecological connections. Correlated with the breakup of the austral landmasses (Gondwanaland) of the Neotropical and Australian regions from the Antarctic continent, the age of this host-parasite community is estimated to be between 60 and 70 million years old. Based on the data from the survey of parasites of mammals from throughout Bolivia and from the phylogenetic analysis of the cestodes, we urge the planners of biodiversity preserves in the neotropics to consider the Yungas of Bolivia as a region that supports an ancient ecological community …
The Plight Of Cranes: A Case Study For Conserving Biodiversity, J. Christopher Haney, Mark E. Eiswerth
The Plight Of Cranes: A Case Study For Conserving Biodiversity, J. Christopher Haney, Mark E. Eiswerth
Proceedings of the North American Crane Workshop
Cranes provide an exemplary case for evaluating conservation policy because (1) they are a charismatic group with high public visibility, (2) as migratory vertebrates they provide an umbrella for the protection of aquatic habitats and a wider set of species, (3) they are a widely-distributed avian family, consequently protection efforts have favored international cooperation, (4) genetic and taxonomic relationships have been studied, and (5) populations of at least 7 crane species are threatened, endangered, or otherwise considered at direct risk. We use comparisons among the world's cranes to show how biogeographic, taxonomic, and genetic data bases can be linked for …