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Experimental Manipulation Of Nitrogen And Phosphorus Nutrient Amendments And Observations Of The In Situ Epiphytic Algal Community From The Lower St Johns River Florida Throughout A Growing Season
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Book Synopsis Experimental Manipulation of Nitrogen and Phosphorus Nutrient Amendments and Observations of the in Situ Epiphytic Algal Community from the Lower St. Johns River (Florida) Throughout a Growing Season by : Angela Elizabeth Dunn
Download or read book Experimental Manipulation of Nitrogen and Phosphorus Nutrient Amendments and Observations of the in Situ Epiphytic Algal Community from the Lower St. Johns River (Florida) Throughout a Growing Season written by Angela Elizabeth Dunn and published by . This book was released on 2007 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Response of the Epiphytic Algal Communities to Experimentally Elevated Nutrient Levels in Intertidal Salt Marsh Habitats by : Stephanie Amy Verhulst
Download or read book Response of the Epiphytic Algal Communities to Experimentally Elevated Nutrient Levels in Intertidal Salt Marsh Habitats written by Stephanie Amy Verhulst and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Epiphytes are organisms attached to plants and are responsible for the majority of primary productivity in many aquatic systems. While epiphytes serve as a valuable food resource to herbivores, they may prove deleterious to the host plant by competing for light and nutrients, as well as increasing sheer stress. This study evaluated the impacts of nutrient additions, nitrogen and phosphorus, on the epiphytic algal community on Spartina alterniflora over the course of two growing seasons. Three nutrient treatments (N, P, and N+P) and one control treatment were placed in a salt marsh in the Tolomato River during the growing seasons of 2011 and 2012. To assess community development, we examined biomass, ash-free dry mass (AFDM), chlorophyll-a levels, cell counts, and community diversity by algal division. The nutrient additions did not significantly alter any of the measured parameters in either sampling year. However, the sampling month did have a significant (pa, and community composition. A total of 155 infrageneric taxa were identified. Biomass tended to be dominated by diatoms and red algae, while cyanobacteria were most abundant. In both years, biomass was highest in the spring with a second smaller pulse in the fall. Conversely, chlorophyll-a levels varied between the years and did not show the same monthly patterns as AFDM. A laboratory study subjecting S. alterniflora to the same nutrient additions also found no significant effects of increased nutrients, but did observe temporal changes in biomass and chlorophyll-a levels. Overall, epiphytic growth was not influenced by nutrient additions in this study suggesting that this and other similar salt marsh systems may be resilient to anthropogenic eutrophication. Instead, other factors, such as light and herbivory, likely played a key role in determining epiphytic algal growth and community composition.
Download or read book Algal Ecology written by and published by Academic Press. This book was released on 1996-06-03 with total page 781 pages. Available in PDF, EPUB and Kindle. Book excerpt: Algae are an important component of aquatic benthic ecosystems because they reflect the health of their environment through their density, abundance, and diversity. This comprehensive and authoritative text is divided into three sections to offer complete coverage of the discussion in this field. The first section introduces the locations of benthic algae in different ecosystems, like streams, large rivers, lakes, and other aquatic habitats. The second section is devoted to the various factors, both biotic and abiotic, that affect benthic freshwater algae. The final section of the book focuses on the role played by algae in a variety of complex freshwater ecosystems. As concern over environmental health escalates, the keystone and pivotal role played by algae is becoming more apparent. This volume in the Aquatic Ecology Series represents an important compilation of the latest research on the crucial niche occupied by algae in aquatic ecosystems. - Presents algae as the important player in relation to environmental health - Prepared by leading authorities in the field - Includes comprehensive treatment of the functions of benthic algae as well as the factors that affect these important aquatic organisms - Acts as an important reference for anyone interested in understanding and managing freshwater ecosystems
Book Synopsis A Method Comparison and Stressor-response Experimental Study of Nitrogen and Phosphorus Impacts to Periphyton in Ozark Streams by : Ashley Renee Rodman
Download or read book A Method Comparison and Stressor-response Experimental Study of Nitrogen and Phosphorus Impacts to Periphyton in Ozark Streams written by Ashley Renee Rodman and published by . This book was released on 2016 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stream bioassessment is important for understanding algal-nutrient relationships and the development of scientifically defensible numeric nutrient criteria. However, multiple methods of periphyton data collection are currently used, and little is known about the comparability of resulting datasets. Literature also suggests other factors besides nutrients (i.e. variable grazing, light, and flow) can confound algal-nutrient relationships. A one-year method comparison study and 31-day algal biomass-nutrient manipulative experiment were conducted in the southern Ozarks of Arkansas. The method comparison study was implemented using two common bioassessment procedures (whole-surface and delimiter-reduced periphyton removal) to assess the potential for combining datasets. During the manipulative experiment, cobbles from the Buffalo River Watershed were exposed to a range of phosphorus (P) and nitrogen (N) concentrations during P-only and N + P enrichment periods to evaluate algal biomass responses using recirculating streamside mesocosms. Results of the method comparison study showed no statistical difference between bioassessment procedures for chlorophyll-a (chl-a) and ash-free dry mass (AFDM) (p = 0.123 and p = 0.550, respectively) or any interaction between method and season. Differences in chl-a and AFDM from both methods were detected (p
Book Synopsis The Relative Significance of Phosphorus and Nitrogen as Algal Nutrients by : Charles M. Weiss
Download or read book The Relative Significance of Phosphorus and Nitrogen as Algal Nutrients written by Charles M. Weiss and published by . This book was released on 1970 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth Rate and Biomass Responses of Periphytic Algae to Phosphorus Enrichment in Experimental Flumes, Athabasca River, Seasonal Variation, 1993 and 1994 by : Alec R. Dale
Download or read book Growth Rate and Biomass Responses of Periphytic Algae to Phosphorus Enrichment in Experimental Flumes, Athabasca River, Seasonal Variation, 1993 and 1994 written by Alec R. Dale and published by . This book was released on 1995 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents results of an experiment conducted in artificial streams (flumes) in which the growth of periphyton (algae) was studied in relation to phosphorus concentrations in the water. The goal of the study was to determine whether periphyton growth in the Athabasca River was phosphorus limited and whether the degree of phosphorus limitation varied seasonally. The experimental flumes were located on site, adjacent to the Athabasca River at Hinton. The experiment was designed to test periphyton growth and biomass response to a gradient of phosphorus additions during fall and early spring. Periphyton response was compared for phosphorus additions of zero (control), 1, 10, and 25 micrograms per litre of phosphorus (spring and fall 1994) or zero, 0.1, 0.2, 1, 5, 10, 25, and 50 micrograms per litre of phosphorus (fall 1993). Results include relative specific growth rates as indicated by measuring the build-up of chlorophyll a, the level at which growth rate saturation occurred, and phosphorus concentrations required to reach maximum biomass levels.
Book Synopsis Nutrient Criteria Technical Guidance Manual by :
Download or read book Nutrient Criteria Technical Guidance Manual written by and published by . This book was released on 2000 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phosphorus Control of Algal Production and Biomass in the Thompson River, British Columbia by : Max L. Bothwell
Download or read book Phosphorus Control of Algal Production and Biomass in the Thompson River, British Columbia written by Max L. Bothwell and published by Saskatoon : National Hydrology Research Centre. This book was released on 1989 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first phase of the experimental trough research program during 1980-81 established that the higher algal biomass levels in the Thompson River downstream from Kamloops Lake were caused by phosphorus originating from point source discharges near Kamloops. The 2nd phase of the program consisted of extensive controlled phosphorus addition experiments conducted at Chase, B.C. during 1984-86. This report presents the results of those experiments.
Book Synopsis Freshwater Algae by : Edward G. Bellinger
Download or read book Freshwater Algae written by Edward G. Bellinger and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freshwater Algae: Identification and Use as Bioindicators provides a comprehensive guide to temperate freshwater algae, with additional information on key species in relation to environmental characteristics and implications for aquatic management. The book uniquely combines practical material on techniques and water quality management with basic algal taxonomy and the role of algae as bioindicators. Freshwater Algae: Identification and Use as Bioindicators is divided into two parts. Part I describes techniques for the sampling, measuring and observation of algae and then looks at the role of algae as bioindicators and the implications for aquatic management. Part II provides the identification of major genera and 250 important species. Well illustrated with numerous original illustrations and photographs, this reference work is essential reading for all practitioners and researchers concerned with assessing and managing the aquatic environment.
Book Synopsis Growth Rate and Biomass Responses of Periphytic Algae to Phosphorus Enrichment in Experimental Flumes, Athabasca River, April and May, 1994 by : Alec R. Dale
Download or read book Growth Rate and Biomass Responses of Periphytic Algae to Phosphorus Enrichment in Experimental Flumes, Athabasca River, April and May, 1994 written by Alec R. Dale and published by . This book was released on 1995 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents results of an experiment conducted in artificial streams (flumes) in which the growth of periphyton (algae) was studied in relation to phosphorus concentrations in the water. The goal of the study was to determine whether periphyton growth in the Athabasca River was phosphorus limited and whether the degree of phosphorus limitation varied from a similar study conducted in fall 1993. The experimental flumes were located on site, adjacent to the Athabasca River at Hinton. The four-week experiment consisted of four treatments: a control of zero phosphorus addition and three experimental levels of 1, 10, and 25 micrograms per litre of phosphorus. Results include relative specific growth rates as indicated by measuring the build-up of chlorophyll a, the level at which growth rate saturation occurred, and phosphorus concentrations required to reach maximum biomass levels in spring.
Book Synopsis Biogeochemistry of Wetlands by : K. Ramesh Reddy
Download or read book Biogeochemistry of Wetlands written by K. Ramesh Reddy and published by CRC Press. This book was released on 2022-09-10 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: The globally important nature of wetland ecosystems has led to their increased protection and restoration as well as their use in engineered systems. Underpinning the beneficial functions of wetlands are a unique suite of physical, chemical, and biological processes that regulate elemental cycling in soils and the water column. This book provides an in-depth coverage of these wetland biogeochemical processes related to the cycling of macroelements including carbon, nitrogen, phosphorus, and sulfur, secondary and trace elements, and toxic organic compounds. In this synthesis, the authors combine more than 100 years of experience studying wetlands and biogeochemistry to look inside the black box of elemental transformations in wetland ecosystems. This new edition is updated throughout to include more topics and provide an integrated view of the coupled nature of biogeochemical cycles in wetland systems. The influence of the elemental cycles is discussed at a range of scales in the context of environmental change including climate, sea level rise, and water quality. Frequent examples of key methods and major case studies are also included to help the reader extend the basic theories for application in their own system. Some of the major topics discussed are: Flooded soil and sediment characteristics Aerobic-anaerobic interfaces Redox chemistry in flooded soil and sediment systems Anaerobic microbial metabolism Plant adaptations to reducing conditions Regulators of organic matter decomposition and accretion Major nutrient sources and sinks Greenhouse gas production and emission Elemental flux processes Remediation of contaminated soils and sediments Coupled C-N-P-S processes Consequences of environmental change in wetlands# The book provides the foundation for a basic understanding of key biogeochemical processes and its applications to solve real world problems. It is detailed, but also assists the reader with box inserts, artfully designed diagrams, and summary tables all supported by numerous current references. This book is an excellent resource for senior undergraduates and graduate students studying ecosystem biogeochemistry with a focus in wetlands and aquatic systems.
Book Synopsis The Role of Iron in Suppressing Internal Phosphorus Loading and Toxic Cyanobacterial Blooms in Freshwater Lakes by : Diane Michelle Orihel
Download or read book The Role of Iron in Suppressing Internal Phosphorus Loading and Toxic Cyanobacterial Blooms in Freshwater Lakes written by Diane Michelle Orihel and published by . This book was released on 2013 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmful algal blooms occur in nutrient-rich lakes around the world, diminishing the value of these ecosystems for wildlife and humans. Management of algal blooms is an on-going challenge for lake managers and policy makers. The overarching goal of this research was to advance our understanding of the environmental factors leading to blooms of potentially toxic cyanobacteria in shallow eutrophic lakes, in order to guide effective management strategies to reduce their occurrence. First, I evaluated the nutrient conditions that lead to elevated levels of microcystins, a hepatotoxin produced by certain cyanobacteria, by consolidating a national database of nutrient and microcystin concentrations for Canadian lakes. Second, I tested whether nutrients released from sediments stimulate toxic cyanobacterial blooms by culturing the cyanobacterium Microcystis in overlying water harvested from incubated lake sediments. Third, I developed and evaluated a conceptual model to explain the biogeochemical pathways leading to toxic cyanobacterial blooms in shallow lakes, based on sediment and culture experiments and lake monitoring in a hypereutophic lake in Alberta, Canada. Fourth, I tested this conceptual model experimentally by manipulating iron loading to in-lake mesocosms and examining changes in sediment chemistry, nutrient cycling, algal biomass and community composition, and microcystin concentrations. The main conclusions of these studies are: (i) microcystins are prevalent in lakes across Canada, but only under high nutrient conditions and at low ratios of nitrogen-to-phosphorus; (ii) lake sediments release bioavailable nutrients that support the growth and toxin production of microcystin-producing cyanobacteria; (iii) toxic blooms of cyanobacteria in shallow lakes may result from the synergy between iron-deficient sediments and discontinuous polymixis; (iv) iron loading to lakes inhibits internal phosphorus loading, decreases algal biomass, discourages the dominance of cyanobacteria, and reduces microcystin concentrations. This research reaffirms the need for controlling internal phosphorus loading in shallow lakes of the Canadian Prairies, and suggests iron treatment may be an effective remediation strategy to complement external nutrient loading reductions. More broadly, this research emphasizes the important role of iron in influencing the trophic status of lakes, and raises concerns for how sulfur pollution and climate change may be exacerbating the problem of lake eutrophication.
Book Synopsis The Temporal and Spatial Relationship Between Phosphorus and Nitrogen Concentrations, Algal Growth, and Nutrient Sources in the Meduxnekeag River Watershed by : Elizabeth A. Fretwell
Download or read book The Temporal and Spatial Relationship Between Phosphorus and Nitrogen Concentrations, Algal Growth, and Nutrient Sources in the Meduxnekeag River Watershed written by Elizabeth A. Fretwell and published by . This book was released on 2006 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cyanobacterial Harmful Algal Blooms: State of the Science and Research Needs by : H. Kenneth Hudnell
Download or read book Cyanobacterial Harmful Algal Blooms: State of the Science and Research Needs written by H. Kenneth Hudnell and published by Springer Science & Business Media. This book was released on 2008-03-13 with total page 955 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the ever-increasing incidence of harmful cyanobacterial algal blooms, this monograph has added urgency and will be essential reading for all sorts of researchers, from neuroscientists to cancer research specialists. The volume contains the proceedings of the 2005 International Symposium on Cyanobacterial Harmful Algal Blooms, and has been edited by H. Kenneth Hudnell, of the US Environmental Protection Agency. It contains much of the most recent research into the subject.
Book Synopsis Bioindicators for Assessing Ecological Integrity of Prairie Wetlands by : Paul R. Adamus
Download or read book Bioindicators for Assessing Ecological Integrity of Prairie Wetlands written by Paul R. Adamus and published by . This book was released on 1996 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book River Algae written by Orlando Necchi JR and published by Springer. This book was released on 2016-06-02 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: The content is focused on benthic communities showing how they play an in important role in the river ecosystems. Provides also information on taxonomy of river-inhabiting algal groups, including phylogeny, distribution, collection, preservation and description of the most representative genera of algae in river benthic algal communities. The book also approaches the ecology of river algae not to mention the ecological factors influencing abundance, distribution and diversity of river benthic algal communities and their use as bio-indicators, providing an up-to-date information on taxonomy, ecology, methodology and uses, and a great source of research to everyone interested in freshwater algae, limnology, water quality assessment and biodiversity in river ecosystems.
Download or read book Periphyton written by Yonghong Wu and published by Elsevier. This book was released on 2016-08-29 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periphyton: Functions and Application in Environmental Remediation presents a systematic overview of a wide variety of periphyton functions and applications in environmental remediation, providing readers with an understanding of the biological/ecological features of periphyton, the methodology of their study, and their application in environmental conservation. With increases in environmental stress, anthropogenic impacts, and the global decline in biodiversity, there is a pressing need for methods to assess and improve environmental quality that are rapid, reliable, and cost-effective. Periphyton is an important component of benthic communities and plays a crucial role in the functioning of microbial food webs. Because of a number of advantages, such as a short lifecycle, relative immobility, more rapid responses to environmental stress and anthropogenic impact than any metazoa, ease of sampling, availability of taxonomic/molecular identification, and standardized methodologies for temporal/spatial comparisons, there has, in recent decades, been an increased interest in periphyton as a tool in biological conservation in aquatic ecosystems. - Presents case studies that help readers implement similar ecological designs - Focuses on the function of periphyton in remediating destructed ecosystems - Provides readers with an understanding of periphyton in practice, especially the value of periphyton in enhancing environmental and ecosystem qualities - Discusses the role of periphyton in purifying water and its effect on abiotic elements
