Sökning: "ecological persistence"

Visar resultat 1 - 5 av 35 avhandlingar innehållade orden ecological persistence.

1. 1. Characterization and persistence of potential human pathogenic vibrios in aquatic environments

   Författare :Betty Collin; Högskolan Kristianstad; Gothenburg University; Göteborgs universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Vibrio cholerae; Vibrio parahaemolyticus; Mozambique; Sweden; molluscs; occurrence; persistence; sediment; TCBS; PCR; PhP; antibiotic resistance; microbiology; Vibrio spp.; Mytilus edulis;

   Sammanfattning : Vibrio spp., natural inhabitants of aquatic environments, are one of the most common causes of bacterial gastroenteritis in the world, being spread to humans via the ingestion of seafood, contaminated drinking water or exposure to seawater. The majority of Vibrio spp. are avirulent, but certain strains may sporadically be human pathogenic. LÄS MER

3. 2. Characterization and persistence of potential human pathogenic vibrios in aquatic environments

   Författare :Betty Collin; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; microbiology; Vibrio spp.; Mozambique; Sweden; Mytilus edulis; Vibrio cholerae; Vibrio parahaemolyticus; persistence;

   Sammanfattning : Vibrio spp., natural inhabitants of aquatic environments, are one of the most common causes of bacterial gastroenteritis in the world, being spread to humans via the ingestion of seafood, contaminated drinking water or exposure to seawater. The majority of Vibrio spp. are avirulent, but certain strains may sporadically be human pathogenic. LÄS MER

4. 3. Phenotypic and genetic adaptations to a new host plant : Ecological divergence of a specialist insect

   Författare :Kalle Nilsson; anpassning och samevolution Artbildning; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ecological speciation; persistence of ecological adaptations; host plant shift; genomic landscape; genomic inversion; parallelism; evolvability; reproductive barriers; Tephritis;

   Sammanfattning : Divergent ecological adaptation resulting from selection is common, but how often it results in differentiation that can last in the face of gene flow is debated. Reproductive barriers persistent to stochastic environmental change are key for species to form. LÄS MER

5. 4. Living on the edge : effectiveness of buffer strips in protecting biodiversity on boreal riparian forests

   Författare :Kristoffer Hylander; Christer Nilsson; Bengt Gunnar Jonsson; Ellen Macdonald; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; boreal forest; bryophyte; buffer strip; ecological boundary; edge effect; headwater stream; land snail; liverwort; moss; phytometer; riparian forest; substrate; terrestrial gastropod; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; ekologisk botanik; Ecological Botany;

   Sammanfattning : The objective of this thesis is to evaluate the ecological consequences of buffer strip retention on riparian and terrestrial biodiversity. Earlier studies on forest buffer strips have evaluated their effectiveness in relation to water quality and aquatic biota. However, forests along streams are species rich habitats for many organism groups. LÄS MER

7. 5. Antibiotic Resistance and Fitness of Escherichia coli in the Infantile Commensal Microbiota

   Författare :Nahid Karami; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ampicillin; tetracycline; in vivo fitness; persistence; gene transfer; intestinal; blaTEM Escherichia coli;

   Sammanfattning : Microbial resistance to antibiotics is a growing problem worldwide. Resistance develops not only in microbes which are the targets of the antibiotic treatment, but also in those belonging to the normal microbiota of the treated host. Little is known on the ecological consequences of antibiotic resistance in commensal bacteria. LÄS MER