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Stable Isotope Analysis Of Food Web Structure In Trout Beck An Upland Stream In Northern England
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Book Synopsis Stable Isotope Analysis of Food Web Structure in Trout Beck, an Upland Stream in Northern England by : Adam Joseph Burns
Download or read book Stable Isotope Analysis of Food Web Structure in Trout Beck, an Upland Stream in Northern England written by Adam Joseph Burns and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Food webs and stable isotopes, volume II by : Jason Newton
Download or read book Food webs and stable isotopes, volume II written by Jason Newton and published by Frontiers Media SA. This book was released on 2023-09-29 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Stable Isotope Analysis of Food Web Structure in Lake Superior by : Christopher James Harvey
Download or read book A Stable Isotope Analysis of Food Web Structure in Lake Superior written by Christopher James Harvey and published by . This book was released on 2001 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stable Isotope Analysis of River Food Webs and Carbon Cycling by : Jacques Christian Finlay
Download or read book Stable Isotope Analysis of River Food Webs and Carbon Cycling written by Jacques Christian Finlay and published by . This book was released on 2000 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stable Isotope Analysis of the Laurentian Great Lakes Food Webs by : Stephanie Noel Schmidt
Download or read book Stable Isotope Analysis of the Laurentian Great Lakes Food Webs written by Stephanie Noel Schmidt and published by . This book was released on 2008 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Food Web Structure in Two Large Floodplain Rivers Assessed Using Stable Isotopes by : Brian Robert Herwig
Download or read book Analysis of Food Web Structure in Two Large Floodplain Rivers Assessed Using Stable Isotopes written by Brian Robert Herwig and published by . This book was released on 2002 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Stable Isotope Analysis of Food Web Dynamics in Lower and Middle Green Bay, Lake Michigan by : Juny Lee
Download or read book A Stable Isotope Analysis of Food Web Dynamics in Lower and Middle Green Bay, Lake Michigan written by Juny Lee and published by . This book was released on 2009 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stable Isotope Ratios and Food Web Structure of Aquatic Ecosystems by : Sandra Marguillier
Download or read book Stable Isotope Ratios and Food Web Structure of Aquatic Ecosystems written by Sandra Marguillier and published by . This book was released on 1998 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stable Isotope Analysis Methods Development and Assessment of Food Web Dynamics After Hypolimnetic Oxygenation in Twin Lakes, WA by : Megan Marie Skinner
Download or read book Stable Isotope Analysis Methods Development and Assessment of Food Web Dynamics After Hypolimnetic Oxygenation in Twin Lakes, WA written by Megan Marie Skinner and published by . This book was released on 2017 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: To ensure proper SIA methods were utilized for the Twin Lakes food web study, I also investigated the necessity of lipid extraction of fish tissues prior to SIA and in situ Rainbow Trout isotopic turnover. I found that mathematical normalization is sufficient to account for bias in delta13C values associated with lipid content in fish tissues when C:N ratios are above 3.5. C:N ratios below 3.5 indicate tissues have insufficient levels of lipid to bias delta13C values. Additionally, I estimated stable carbon retention time of 154 (95% CI: 106 to 224) and 292 (95% CI: 257 to 763) days for Rainbow Trout liver and white muscle, respectively. For nitrogen, I estimated a retention time of 186 (95% CI: 114 to 329) days for both white muscle and liver. Generally, these findings support the use of more timely and cost-effective processing methods and improve interpretation of SIA in future aquatic food web and diet studies involving adult coldwater fish in freshwater systems.
Book Synopsis Stable Isotope Analysis of Dublin Bay Food Web by : Sandrine Laurand
Download or read book Stable Isotope Analysis of Dublin Bay Food Web written by Sandrine Laurand and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A stable isotope evaluation of the structure and spatial heterogeneity of a Lake Superior food web by : C.J. HARVEY
Download or read book A stable isotope evaluation of the structure and spatial heterogeneity of a Lake Superior food web written by C.J. HARVEY and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Understanding the Effects of Consumers and Light on Stream Food Webs Using Stable Isotope Techniques by : Sarah Michelle Collins
Download or read book Understanding the Effects of Consumers and Light on Stream Food Webs Using Stable Isotope Techniques written by Sarah Michelle Collins and published by . This book was released on 2015 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: In headwater streams that are heavily shaded by surrounding forests, primary production is often low and inputs of particulate and dissolved organic carbon from terrestrial environments are important resources in food webs. Stable isotope methods are useful for quantifying food web fluxes of different carbon sources but data are frequently difficult to interpret. Here, I developed novel stable isotope techniques to study the role of terrestrial energy subsidies in stream food webs in Trinidad and Tobago and the Adirondack region of New York. Specifically, I sought to determine the importance of carbon sources from terrestrial environments versus in-stream primary production in streams with varying light availability and fish communities. I compared natural canopy streams to streams with experimentally thinned canopies using a novel carbon and nitrogen dual isotope tracer technique. Comparing data from 13 C-acetate tracers, which are assimilated only by heterotrophic bacteria, and 15N- ammonium tracers, which are assimilated by both heterotrophs and autotrophs, allowed me to evaluate the relative importance of terrestrial carbon inputs and heterotrophic pathways. I also compared food webs in Trinidad and Adirondack streams along a natural gradient of canopy cover using stable isotopes of hydrogen, which indicated how much terrestrial organic matter was assimilated by consumers. In the Adirondacks, terrestrial carbon subsidies and heterotrophic bacteria were important resources for consumers, but the amount of bacterial carbon assimilated by invertebrates declined when light availability and primary production were experimentally increased. Fish introductions and light availability both influenced food webs in Trinidad streams. There were increased fluxes of carbon and nitrogen to consumers in streams with high light. Effects of fish introduction varied by consumer taxon, with strong positive effects of fish on filter-feeding invertebrates, and weaker positive effects of fish on grazer invertebrates. In comparative studies across light gradients, most consumer taxa were flexible in the amount of terrestrial carbon they assimilated, with higher reliance on terrestrial subsidies in streams with high canopy cover than in larger streams with less canopy cover. Overall, these results suggest that the light environment can have a strong influence on the role of terrestrial subsidies in streams.
Book Synopsis Assessment of Aquatic Food Web Recovery from Fish Introductions and Trophic Structure in Lakes of the Sierra Nevada, California, Using Stable Isotopes by : Paul David Koster (II.)
Download or read book Assessment of Aquatic Food Web Recovery from Fish Introductions and Trophic Structure in Lakes of the Sierra Nevada, California, Using Stable Isotopes written by Paul David Koster (II.) and published by . This book was released on 2012 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: I examined the trophic structure of lakes containing and lacking fish using carbon and nitrogen stable isotopes. [Delta] 15 N values revealed distinct trophic fractionation values for each type of lake. Trophic fractionation for fish-containing and fish-removed lakes was 2.03 [per thousand] ± 0.517 (n=116) and 1.76 [per thousand] ± 0.384 (n=186) respectively. Nitrogen values in fish-containing lakes species tended to be enriched relative to fish-removed lakes, suggesting increased P availability. Time-series of [Delta] 15 N for multiple species indicated small variations in nitrogen suggesting changes in diet from year to year. However significant depletion of 4.42 [per thousand] was noted for the copepod Leptodiaptomus signicauda and correlated with the reemergence of Daphnia melanica post fish removal. Computations of trophic position indicated that frogs and fish occupy the same trophic level and likely rely on the same food sources. This finding suggests that fish cause extirpation of frogs both through direct predation and competition for food resources.
Book Synopsis An Evaluation of the Food Web Dynamics and Predator Prey Interactions in Scofield Reservoir by : Lisa K. Winters
Download or read book An Evaluation of the Food Web Dynamics and Predator Prey Interactions in Scofield Reservoir written by Lisa K. Winters and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquatic food webs are comprised of complex spatial and temporal interactions within and among trophic levels. Human manipulations, such as construction of reservoirs, enhance uncertainties in our understanding of aquatic food web structure. Reservoirs are novel ecosystems which contain a unique composition of species. Species introductions into reservoirs may disrupt interactions within an already complex and poorly understood food web. In Scofield Reservoir in central Utah, a rapidly expanding population of Utah chub poses a detrimental threat to the blue-ribbon trout fishery. The Utah Division of Wildlife Resources has recently stocked cutthroat trout and tiger trout (a brown trout x brook trout hybrid) to potentially reduce Utah chub numbers as well as to enhance the sport fishery. I used standard fisheries techniques to describe food web interactions and to assess the potential for these piscivorous trout to control the expanding Utah chub population, as well as to determine sport fish performance and quantify diet overlap amongst top predators. Using bioenergetics modeling, I estimated very high rates of Utah chub consumption by cutthroat trout and tiger trout. These two species collectively display control of Utah chub, as the chub population is no longer exponentially increasing. Cutthroat trout and tiger trout are likely not food limited and convincingly exhibit high performance, as abundance of Utah chub is still extremely high. Both diet and stable isotope analysis showed significant overlap between these top piscivores in the reservoir, but also substantial overlap between cutthroat trout and rainbow trout with respect to Utah chub. Analysis of rainbow trout suggested this species is performing poorly; rainbow trout had extremely low catch rates and never switched to a piscivorous diet at larger sizes. Utah chub and rainbow trout had similar diet compositions, and thus rainbow trout may be competing (poorly) for food and space resources. This study contributes to our understanding of interspecific interactions among these unique assemblages of top predators in this artificial system. This research also provides knowledge to fisheries managers tasked with providing optimal sport fisheries in these artificial and dynamic systems, as well as expanding on our extremely limited knowledge of tiger trout ecology.
Book Synopsis Proceedings by : International Association of Theoretical and Applied Limnology
Download or read book Proceedings written by International Association of Theoretical and Applied Limnology and published by . This book was released on 2002 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis British National Bibliography for Report Literature by :
Download or read book British National Bibliography for Report Literature written by and published by . This book was released on 2001-11 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Travaux by : International Association of Theoretical and Applied Limnology
Download or read book Travaux written by International Association of Theoretical and Applied Limnology and published by . This book was released on 2000 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
