Download or read book Texas Aquatic Science written by Rudolph A. Rosen and published by Texas A&M University Press. This book was released on 2014-11-19 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classroom resource provides clear, concise scientific information in an understandable and enjoyable way about water and aquatic life. Spanning the hydrologic cycle from rain to watersheds, aquifers to springs, rivers to estuaries, ample illustrations promote understanding of important concepts and clarify major ideas. Aquatic science is covered comprehensively, with relevant principles of chemistry, physics, geology, geography, ecology, and biology included throughout the text. Emphasizing water sustainability and conservation, the book tells us what we can do personally to conserve for the future and presents job and volunteer opportunities in the hope that some students will pursue careers in aquatic science. Texas Aquatic Science, originally developed as part of a multi-faceted education project for middle and high school students, can also be used at the college level for non-science majors, in the home-school environment, and by anyone who educates kids about nature and water. To learn more about The Meadows Center for Water and the Environment, sponsors of this book's series, please click here.
Download or read book Aquatic Plant Control Research Program Effects of Water Chemistry on Aquatic Plants Interrelationships Among Biomass Production Plant Nutrition and Water Chemistry written by R. M. Smart and published by . This book was released on 1988 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growth of the submersed aquatic plants Egeria densa, Hydrilla verticillata, and Potamogeton nodosus was examined under two aeration regimes (ambient air and carbon dioxide (CO2)-enriched air) in three solutions differing in levels of major cations (calcium (Ca), magnesium (Mg), sodium (Na), and potassium (K) and inorganic carbon (CT). Study objectives were to evaluate the effects of plant growth on solution chemical composition; interrelationships among solution chemistry, plant growth, and nutrition; and the relative importance of solution and sediment as potential growth-limiting factors. Plant growth was shown to be limited by inorganic carbon supply in the low-cation, low-carbon solution, and by sediment nitrogen (N) availability in the higher cation, higher carbon solutions. The response of submersed aquatic plants to solution was thus affected by sediment N supply. While plant requirements of N and P (phosphorus) were provided by root uptake from sediment, K was provided by foliar uptake from solution. Both inorganic carbon and sediment N were identified as factors potentially limiting the growth of field populations of submersed aquatic plants. Keywords: Aquatic plants, Carbon dioxide limitation, Egeria, Hydrilla, Nutrient limitation, Nutrient uptake, Potamogeton, Submersed macrophytes, Water chemistry.
Download or read book Effects of Water Chemistry on Aquatic Plants written by R. Michael Smart and published by . This book was released on 1988 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Water Chemistry on Aquatic Plants written by R. Michael Smart and published by . This book was released on 1990 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Plant Control Research Program Effects of Water Chemistry on Submersed Aquatic Plants A Synthesis written by R. M. Smart and published by . This book was released on 1990 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Submersed aquatic plants require a continual supply of inorganic carbon to fuel photosynthesis. However, the aquatic environment imposes limits on both the supply and availability of inorganic carbon. Several factors, including alkalinity, dissolved inorganic carbon (DIC), and pH, affect the availability of inorganic carbon. These factors are among the most important water chemistry parameters with respect to their potential effects on the growth and distribution of submersed aquatic plants. Many submersed plants exhibit adaptations enabling them to more readily acquire inorganic carbon from the aquatic environment. A common adaptation is the ability to use bicarbonate (usually the predominant form of DIC) in photosynthesis. Photosynthesis in bicarbonate users, typified by Eurasian watermilfoil, is roughly proportional to DIC concentration. While photosynthesis is directly related to DIC, the relationship between plant biomass production and DIC is less clear. Factors other than DIC (such as nutrient limitation) also affect biomass production. Although inorganic carbon supply may limit growth rate, peak biomass attainment may be more likely limited by nitrogen availability. While water chemistry influences species distribution, it is unlikely that this factor is involved in limitations on biomass production.
Download or read book Effects of Water Chemistry on Submersed Aquatic Plants written by R. Michael Smart and published by . This book was released on 1990 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Water Chemistry on Aquatic Plants written by R. Michael Smart and published by . This book was released on 1986 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Plant Control Research Program Effects of Water Chemistry on Aquatic Plants Growth and Photosynthesis of Myriophyllum Spicatum L written by R. Michael Smart and published by . This book was released on 1986 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growth of the submersed macrophyte, Myriophyllum spictam L., was examined in nine solutions differing in major cation (Ca, Mg, Na, and K) and inorganic carbon C sub t levels. Growth experiments were conducted under two conditions differing in the relative magnitudes of gas exchange and solution volume. Under conditions of limited solution volume, growth was adversely affected by the combination of low cation (particularly Ca) and low C sub t levels. However, where solution volume was greater, there was no effect of cations. Irrespective of volume, growth was increased by increasing C sub t from 3.5 to 10.5 mg/l, but was unaffected by further increase in C sub t to 21.00 mg/l. Photosynthetic uptake of C sub t during growth reduced levels of C sub t and acidity and increased pH. Alkalinity and Ca levels were also reduced in some solutions due to the precipitation of CaCO3. Diurnal analyses indicated C sub t was not appreciably replenished during the night; thus, the experimental systems continually lost C sub t throughout the study. Initial photosynthesis rates, measured in the same solutions, indicated a strong relationship between photosynthesic and solution C sub t. Measurements of the exchange of CO2 between the atmosphere and the solution during the photosynthesis experiments revealed the potential importance of the atmosphere as a significant source of carbon. Keywords: Aquatic plants; Eurasion watermilfoil; Water chemistry.
Download or read book Aquatic Plant Control Research Program Effects of Water Chemistry on Aquatic Plants Interactive Effects of Inorganic Carbon and Nitrogen on Biomass Production and Plant Nutrition written by R. M. Smart and published by . This book was released on 1990 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growth of submersed Egeria densa, Hydrilla verticillata, and Myriophyllum spicatum was examined under 2 levels of inorganic carbon supply, at 2 sediment nitrogen levels, in a solution containing moderate levels of major cations and inorganic carbon. The study's primary objective was to evaluate the interactive effects of inorganic carbon supply and sediment N availability on plant growth and nutrition. Results indicate that both inorganic carbon supply and sediment N availability can limit growth of submersed aquatic plant populations. Egeria was more affected by inorganic carbon supply, Myriophyllum was more affected by sediment N availability, and Hydrilla was equally affected by both factors. Maximal plant growth of all species occurred under conditions of high inorganic carbon supply and high sediment N availability, indicating that suboptimal levels of either factor can depress growth. The results suggest the existence of a feedback loop regulating biomass production in submersed aquatic plants. Increases in the supply of either limiting factor may result in increased demand for the other factor, eventually resulting in low levels of both factors.
Download or read book Ecology of Aquatic Plant Species Effects of Water Chemistry on Aquatic Plant Species Preliminary Studies on Myriophyllum Spicatum written by R. M. Smart and published by . This book was released on 1984 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of water chemistry on the growth of M. spicatum appears to involve primarily the availability of dissolved inorganic carbon. Under low carbon conditions, specific cations (Ca and to a lesser extent K) may be involved in carbon acquisition (Lowenhaput 1956; Lucas and Dainty 1977). The combined effects of low levels of Ca and low C availability can result in decreased growth and the development of premature senescence in M. spicatum.
Download or read book Some Effects of the Larger Types of Aquatic Vegetation on Iron Content of Water written by Eugene T. Oborn and published by . This book was released on 1962 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemometrics and Cheminformatics in Aquatic Toxicology written by Kunal Roy and published by John Wiley & Sons. This book was released on 2022-01-06 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: CHEMOMETRICS AND CHEMINFORMATICS IN AQUATIC TOXICOLOGY Explore chemometric and cheminformatic techniques and tools in aquatic toxicology Chemometrics and Cheminformatics in Aquatic Toxicology delivers an exploration of the existing and emerging problems of contamination of the aquatic environment through various metal and organic pollutants, including industrial chemicals, pharmaceuticals, cosmetics, biocides, nanomaterials, pesticides, surfactants, dyes, and more. The book discusses different chemometric and cheminformatic tools for non-experts and their application to the analysis and modeling of toxicity data of chemicals to various aquatic organisms. You’ll learn about a variety of aquatic toxicity databases and chemometric software tools and webservers as well as practical examples of model development, including illustrations. You’ll also find case studies and literature reports to round out your understanding of the subject. Finally, you’ll learn about tools and protocols including machine learning, data mining, and QSAR and ligand-based chemical design methods. Readers will also benefit from the inclusion of: A thorough introduction to chemometric and cheminformatic tools and techniques, including machine learning and data mining An exploration of aquatic toxicity databases, chemometric software tools, and webservers Practical examples and case studies to highlight and illustrate the concepts contained within the book A concise treatment of chemometric and cheminformatic tools and their application to the analysis and modeling of toxicity data Perfect for researchers and students in chemistry and the environmental and pharmaceutical sciences, Chemometrics and Cheminformatics in Aquatic Toxicology will also earn a place in the libraries of professionals in the chemical industry and regulators whose work involves chemometrics.
Download or read book Water Resources Research Catalog written by and published by . This book was released on 1966 with total page 1464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Data Books of Britain and Ireland written by N. F. Stewart and published by . This book was released on 1992 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lower plant conservation has moved forward considerably. This book represents a joint venture between the nature and conservation agencies of Ireland and the United Kingdom. There are only 33 species of the algae called Stoneworts in Ireland and the UK, but they are of great ecological significance, often carpeting vast areas in freshwater lakes and forming an important source of food for diving ducks. A high proportion of the group is regarded as threatened. This book aims to bring stoneworts to the wider attention of those who manage sites for nature conservation.
Download or read book Possible Relationships Between Surface Water Chemistry and Aquatic Plants in the Northern Great Plains written by Kristin K. Sletten and published by . This book was released on 1984 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fate And Prediction Of Environmental Chemicals In Soils Plants And Aquatic Systems written by Mohammed Mansour and published by CRC Press. This book was released on 2018-02-06 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fate and Prediction of Environmental Chemicals in Soils, Plants, and Aquatic Systems focuses on the chemical persistence and ecotoxicological behavior of pesticides in soil, water, and plants. The book examines recent developments in research on various substances and relays information regarding transport, adsorption, absorption, accumulation, degradation, biological effects, toxicity to aquatic organisms, air pollution, exposure, and risk estimation. Leading international scientists present their advances in analytical methodology and instrumentation in the fields of agrochemicals and environmental chemistry. This useful review of data, methods, and principles will benefit environmental researchers, managers, biologists, chemists, pharmacologists, and others interested in assessing the potential for contamination of soil, air, water, and plants.
Download or read book Aquatic Plant Chemistry written by Robert T. LaLonde and published by . This book was released on 1970 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Possibly aquatic plants can play a role in aquatic ecology through the production and release of biologically active agents. The research objective was to determine the presence, chemical nature and biological activity of plant-produced agents. Nuphar luteum subsp. variegatum and macrophyllum produce both C-15 alkaloids and C-30, sulfur-containing alkaloids. Two of the latter type were isolated. Both were determined as stereoisomeric biscarbinolamines incorporated into two deoxynupharidine moieties linked together at C-7 through a thiaspirane ring. Two new C-15 alkaloids, 7-epideoxynupharidine and 3-epinuphamine, were discovered in N. luteum subsp. variegatum. Both C-30, sulfur-containing alkaloids were active against Corynebacterium michiganense. The more abundant of the two C-30 alkaloids was tested further against five additional phytopathogenic bacteria and was active against four of these. The same alkaloid was inactive against three bacteria taken from the site where the plant material was harvested. C-15 alkaloids, nupharidine and deoxynupharidine, were inactive against C. michiganense, the bacteria most sensitive to the sulfur-containing alkaloids. There is now sufficient indication that Nuphar produces agents which are active against some phytopathogenic bacteria. The extent of the release of Nuphar-produced agents into the surrounding aquatic environment should be studied.
