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21	Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta) Evans, Joshua R. 19 September 2017 (has links) No description available. Aquatic Sciences Bioinformatics Biology Biostatistics Ecology Evolution and Development Experiments Freshwater Ecology Genetics Molecular Biology Organismal Biology Plant Biology Plant Sciences Systematic photoacclimation red algae gene expression aquatic biology phylogeny photosynthesis
22	Förekomst av mikroplaster i tångmärlor (Gammaridae) längs södra Hallandskusten Karlsson, Joakim January 2020 (has links) Since the middle of the 20th century, scientists have observed that marine organisms ingest plastics in various shapes, directly or through food. Plastics smaller than 5 millimetres, called microplastics, have in recent years gained more attention and been found to accumulate environmental toxins. A family of organisms which have been found to ingest microplastics is Gammaridae, which are important as food sources and detritivores in many ecosystems. In this study, the occurrence of microplastics in marine gammarids was investigated in three rural and three urban areas, along the coast of Halland and northern Skåne. The aim was to find out if these organisms contain microplastics and to compare the occurrence in rural versus urban areas. Microplastics were found in 33 (approx. 14.9 %) of 221 samples, ranging from 0 to 3 microplastics per individual. A significant difference in the average amount of microplastics per individual was found between the rural and urban areas; the urban areas had a higher average, with one exception. In other studies, urban areas have been found to often contain more microplastics than rural areas, increasing the possibility that organisms in these areas ingest plastics. With more boat traffic and inhabitants in general, along with streams transferring plastics from inland areas, the amount of emissions in urban areas can be greater than in rural parts. The result shows that microplastics occur in marine gammarids in the 3 examined areas and that these organisms therefore may have an important part in the transfer of microplastics between trophic levels. / Sedan mitten av 1900-talet har forskare observerat att marina organismer tar in plaster i olika former, direkt eller via föda. Plastpartiklar mindre än 5 millimeter, så kallade mikroplaster, har på senare år fått större uppmärksamhet och har också visat sig kunna ackumulera miljögifter. En familj av organismer som man funnit mikroplaster i är tångmärlor (Gammaridae), vilka i många ekosystem är viktiga som födokällor och nedbrytare. I denna studie undersöktes förekomsten av mikroplaster i marina tångmärlor på tre lokaler i stadsområden respektive landsbygdsområden, längs Hallandskusten och Skånes norra kust. Syftet var att se ifall dessa organismer innehåller mikroplaster samt jämföra förekomsten i landsbygdsområden kontra stadsområden. Av 221 analyserade prov förekom mikroplaster i 33 (ca 14,9 %) och förekomsten per individ varierade från 0 till 3 mikroplaster. En signifikant skillnad i medelvärde av mikroplaster per individ fanns mellan landsbygdsområden och urbana områden; urbana områden innehöll i genomsnitt mer men med ett undantag. I andra studier har man funnit belägg för att stadsområden ofta innehåller mer mikroplaster än landsbygdsområden, något som ökar risken för att organismer i dessa områden tar in plaster. Med mer båttrafik och antal invånare överlag, tillsammans med vattendrag som för med sig plast från inlandet, kan det i dessa områden ge en större utsläppsmängd i jämförelse med i landsbygdsområden. Resultatet visar på att mikroplaster förekommer i marina tångmärlor i de undersökta områdena och att dessa organismer därmed kan vara en viktig del i överföringen av mikroplaster mellan trofiska nivåer. plastic plastics microplastics microplastic Amphipoda gammarid gammarids Gammaridae Gammarus Halland Skåne rural urban biology aquatic biology Falkenberg Ugglarp Halmstad Laxvik Båstad Kattvik Sweden trophic transfer plast plaster mikroplaster mikroplast tångmärlor tångmärla Gammaridae Gammarus gammarid gammarider märlkräfta märlkräftor Amphipoda Halland Skåne landsbygd stad biologi akvatisk biologi Falkenberg Ugglarp Halmstad Laxvik Båstad Kattvik Sverige trofisk överföring Biological Sciences Biologiska vetenskaper Other Biological Topics Annan biologi
23	Testing and Refining a Unique Approach for Setting Environmental Flow and Water Level Targets for a Southern Ontario Subwatershed Beaton, Andrew 15 August 2012 (has links) In this study Bradford’s (2008) approach for setting ecological flow and water level targets is tested and refined through application within the Lake Simcoe Region Conservation Authority’s (LSRCA) subwatershed of Lover’s Creek. A method for defining subwatershed objectives and identifying habitat specialists through expert input is proposed and tested. The natural regime of each streamflow and wetland site is characterized along with the hydrological alteration at each site. Potential ecological responses to the hydrologic alterations are then hypothesized for the different types of changes calculated at each site. Methods for setting overall ecosystem health and specific ecological objective flow targets are proposed and tested. These targets are integrated into a flow regime for each site and a process for using this information for decision making is suggested. Flow magnitude quantification is attempted using hydraulic modelling and sediment transport equations, however the data used were found to be inadequate for this application. The accuracy of the targets developed using the method presented in this paper is mainly limited by the accuracy of the hydrological model and quantified flow magnitudes. Recommendations for improving these components of the assessment are made. The unique approach and recommendations presented in this paper provide explicit steps for developing flow targets for subwatersheds within the LSRCA. This research contributes toward the advancement of EFA within the LSRCA, which provides opportunity for enhanced protection and restoration of ecosystem health across the watershed. / Lake Simcoe Region Conservation Authority Ecological flows environmental flow instream flow in-stream flow indicators of hydrologic alteration ecological flow components Lovers Creek Lake Simcoe Watershed streamflow wetland hydroperiod MIKE-SHE HEC-RAS HEC-GeoRAS Du Boyes equation Ontario Stream Assessment Protocol OSAP IHA Southern Ontario Ontario LSRCA flow regime decision making Ontario hydrologic model hydraulic model brook trout amphibian swamp Ontario Wetland Evaluation System ecological function hydrological function expert interview Delphi Technique geomorphic framework river stream hydrology cold water fish Andrea Bradford aquatic aquatic habitat aquatic biology groundwater land use change urbanization pool riffle pool-riffle

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