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 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 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 List of Publications of the U S Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1993 with total page 408 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 Government Reports Announcements Index written by and published by . This book was released on 1990-12 with total page 1324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1990 with total page 1608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Plant Control Research Program written by and published by . This book was released on 1991 with total page 8 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 1988 with total page 34 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 Program written by and published by . This book was released on 1973 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Plant Control Program Mobile District written by and published by . This book was released on 1978 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings 28th Annual Meeting Aquatic Plant Control Research Program written by Aquatic Plant Control Research Program (U.S. Army Engineer Waterways Experiment Station). Meeting and published by . This book was released on 1994 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1985 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings 24th Annual Meeting Aquatic Plant Control Research Program written by Aquatic Plant Control Research Program (U.S. Army Engineer Waterways Experiment Station). Meeting and published by . This book was released on 1990 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cooperative Aquatic Plant Control Program written by and published by . This book was released on 1981 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1999 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
