Download or read book Food web Dynamics of Lake Ontario as Determined by Carbon and Nitrogen Stable Isotope Analysis written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book A Seasonal Investigation of Energy Transfer and Food Web Structure of the Deepwater Sculpin Myoxocephalus Thompsoni in Grand Traverse Bay Lake Michigan written by Colleen Frances Masterson and published by . This book was released on 2001 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Toxicology written by J Rose and published by CRC Press. This book was released on 2003-09-02 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because our chemical environment affects our physical and mental well-being, it is a matter of increasing concern and is therefore attracting much research effort. This timely collection of essays highlights current developments in the field of environmental toxicology. Chapters analyze the carcinogenic, mutagenic, genotoxic, and neurotoxic effects of both anthropogenic and natural toxins in the soil, air, and water around us, as well as in our workplace and diet. The book also examines the effects of toxins on other organisms, as well as the techniques, policies, and management strategies employed in studying and controlling environmental pollutants. It will be an essential reference to a variety of personnel in environmental studies and public health.
Download or read book A Stable Carbon and Nitrogen Isotope Study of Lake Food Webs in Canada s Boreal Plain written by Ellie E. Prepas and published by . This book was released on 2001 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report written by Great Lakes Environmental Research Laboratory and published by . This book was released on with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report Great Lakes Environmental Research Laboratory written by Great Lakes Environmental Research Laboratory and published by . This book was released on 1988 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecosystem Ecology written by Sven Erik Jørgensen and published by Academic Press. This book was released on 2009-07-25 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jorgensen's Ecosystem Ecology provides a thorough and comprehensive overview of the world’s aquatic and terrestrial ecosystems. This derivative volume based on the best-selling Encyclopedia of Ecology (published 2008) is the only book currently published that provides an overview of the world’s ecosystems in a concise format. Provides an overview of the world’s ecosystems in a concise format Covers aquatic and terrestrial ecosystems Based on the best-selling Encyclopedia of Ecology Full-color figures and tables support the text and aid in understanding
Download or read book The subalpine lake ecosystem vre Heimdalsvatn and its catchment local and global changes over the last 50 years written by John E. Brittain and published by Springer. This book was released on 2015-03-21 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes research from 50 years of intensive study of a pristine subalpine lake ecosystem and its catchment. Coverage spans a range of topics, including studies focusing on changes in ice cover, water temperature, zooplankton, benthos and fish.
Download or read book Interactions Among Nutrient and Food Web Dynamics written by Thomas W. Amidon and published by . This book was released on 1993 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2008 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book State of Lake Ontario written by M. Munawar and published by Aquatic Ecosystem Health & Mgmt Soc. This book was released on 2003 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: This State of Lake Ontario volume reflects the breadth of scientific inquiry, the wealth of information on the past and present, and the future of this large ecosystem. The luxury of knowledge and understanding of the Lake Ontario ecosystem speaks volumes to its uniqueness as a long-term ecological site and, more important, as a barometer of ecological change globally.
Download or read book Proceedings written by International Association of Theoretical and Applied Limnology and published by . This book was released on 2008 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structure and Dynamics of Fish Isotopic and Trophic Niches in Natural Lakes and Constructed Fisheries Offsets in the Alberta Oil Sands written by Karling N. Roberts and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Habitat offsets, where damages to natural ecosystems caused by socio-economic development projects are compensated for by the construction or restoration of other ecosystems, can contribute to biological conservation when implemented properly. But, large uncertainties remain surrounding our ability to construct ecosystems that offer high quality habitat and sustainably provide desired ecosystem functions and services. Trophic structure and dynamics maintain biodiversity and sustain ecosystem function by limiting competition between consumers and alleviating prey species from damaging levels of predation. The application of food web theory has improved outcomes in ecological restoration and conservation, and has the potential to do the same for habitat offsetting. In this thesis I asses trophic structure and seasonal trophic dynamics of an offset, and examine how stable isotope analysis can be improved for use on sensitive species and in multi-season studies. In the Alberta oil sands, unavoidable destruction of fish habitat from open-pit mining is offset with the construction of small lakes on or near mine sites. To investigate trophic structure in constructed offsets, I sampled the first offset lake constructed in the Alberta oil sands, Horizon Lake, and eight natural lakes for comparison. I measured stable carbon and nitrogen isotope ratios in the tissues of fish, and used these values to estimate metrics of trophic structure. Despite the unique fish assemblage found in the offset lake, its trophic structure metrics are within the range of variation detected in natural lakes. The offset lake was most similar in terms of habitat to natural lakes that are relatively small and deep, but its trophic structure was more like large lakes with diverse fish assemblages. I recommend trophic structure continue to be examined in these and other offsets to further our understanding of their effectiveness in compensating for habitat loss and their potentially unique ecology. Seasonal variation in environmental conditions and resource availability may play an underappreciated role in the maintenance of biodiversity, especially in ecosystems that experience drastic seasonal changes. High-latitude and high-altitude aquatic ecosystems switch between an open water state in the summer and an ice-covered state in the winter. This large environmental change is associated with reduced primary and secondary productivity, but it is not clear how consumers such as fishes respond. To address this knowledge gap, I examined the trophic dynamics of fish populations in three natural lakes and one constructed offset habitat. I used stable isotope analysis and stomach content analysis to assess if fish were 1) maintaining the same diet across seasons, 2) changing their diet seasonally, or 3) going dormant seasonally. Most fishes fed all year-round. Some populations displayed clear seasonal changes in their diet, others displayed less drastic diet shifts, and one population maintained the same diet year-round. Only one population went seasonally dormant in the winter. Flexible foraging and a diversity of seasonal trophic responses among fish populations are likely contributing to the maintenance of biodiversity within these ecosystems. Evidence of winter activity by fishes in the offset is promising, and suggests the habitat is providing over-wintering habitat for fishes. Stable isotope analysis is an important ecological method with many applications, but it often requires lethal sampling to obtain tissue samples. In addition, most stable isotope research is performed in the summer, leaving a gap in our understanding of whether isotope data collected in different seasons can be interpreted using the same methods. To address this, I investigated how lethal (muscle) and non-lethal (fin) tissues differ in their stable carbon and nitrogen isotope ratios, and whether inter-tissue differences change with season. I found that muscle and fin differ in carbon and nitrogen stable isotope ratios, but whether season affects this relationship is species- and isotope-dependent. I recommend accounting for differences in tissue types whenever possible, and accounting for season of capture when research questions are highly sensitive to variation in isotope ratios. Overall, this thesis demonstrates how ecological study of constructed offsets can advance our understanding of human modified ecosystems, basic ecological principles, and ecological methods. As offsetting grows as a practice across Canada and around the world, using these large-scale projects to further these objectives is imperative for improving the practice of offsetting and represents an enormous opportunity for advancing ecological research.
Download or read book The Biological and Physical Interactions of Mysis Relicta in Lake Ontario written by Gideon Gal and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1999 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
