Download or read book Taxon specific Analysis of Microzooplankton Grazing Rates and Phytoplankton Growth Rates Estimated from Chromatographic Pigment Analysis written by Tye Y. Waterhouse and published by . This book was released on 1992 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taxon specific analysis of microzooplankton grazing rates and phytoplankton growth rates written by T.Y. WATERHOUSE and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Microzooplankton and Mesozooplankton Grazing During the Planktothrix dominated Cyanobacterial Blooms in Sandusky Bay Lake Erie written by Matthew R. Kennedy and published by . This book was released on 2020 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the role of internal top-down trophic grazing interactions from zooplankton is necessary to better determine cyanobacterial algal bloom establishment as a parallel to more common investigation into the role of changes in nutrient concentrations, or bottom-up enrichment, on bloom structure and function. Bi-weekly samples were collected from two locations in Sandusky Bay, Lake Erie between March 2019 to October 2019 to capture pre-bloom, early-bloom, and late-bloom conditions. For microzooplankton analysis, dilution experiments were conducted to determine grazing rates using previously established methods. Mesozooplankton grazing rates were determined by concentrating natural populations to 8 times ambient levels, then measuring phytoplankton growth rate changes. After 24 hours samples for both experiments were collected for analysis of total chlorophyll É1 pigment concentration using fluorometry and analysis of chlorophyll É1 pigment concentration as well as phytoplankton community structure using a BBE Fluoroprobe. Phytoplankton cell enumeration using light microscopy was also conducted to determine cyanobacterial cell densities. This research also provided additional insights into correlations of chlorophyll É1 data analysis between fluorometry and BBE Fluoroprobes. Results indicated that microzooplankton were actively grazing on the overall phytoplankton community in the majority of experiments conducted and that microzooplankton grazing rates were not negatively affected by increases in cyanobacterial density. In contrast mesozooplankton grazing rates were extremely low or no grazing was seen in the majority of experiments. Overall, this study indicated that while microzooplankton can play an important role, mesozooplankton grazing may not, in the top-down control of Planktothrix-dominated blooms in Sandusky Bay, Lake Erie.
Download or read book Pigment specific rates of phytoplankton growth and microzooplankton grazing in the open subarctic Pacific Ocean written by S.L. STROM and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Abstracts International written by and published by . This book was released on 1993 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Chlorophyll Research and Application 2012 Edition written by and published by ScholarlyEditions. This book was released on 2012-12-26 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Chlorophyll Research and Application / 2012 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Chlorophyll. The editors have built Advances in Chlorophyll Research and Application / 2012 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Chlorophyll in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Advances in Chlorophyll Research and Application / 2012 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Microzooplankton Grazing Growth and Gross Growth Efficiency are Affected by PCO2 Induced Changes in Phytoplankton Biology written by Kelly Still and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accumulating evidence shows that ocean acidification (OA) alters surface ocean chemistry and, in turn, affects aspects of phytoplankton biology. However, very little research has been done to determine if OA-induced changes to phytoplankton morphology, physiology and biochemistry may indirectly affect microzooplankton, the primary consumers of phytoplankton. This is one of the first studies to explore how OA may indirectly affect microzooplankton ingestion, population growth and gross growth efficiency (GGE). I hypothesized 1) that the physiology, biochemistry and morphology of the phytoplankton Rhodomonas sp. would be directly affected by elevated pCO2 and 2) that pCO2-induced changes in Rhodomonas sp. would affect grazing, growth rates, and GGE in microzooplankton consumers. To test my first hypothesis, I cultured the ecologically important phytoplankton, Rhodomonas sp., semi-continuously for 17 days under three pCO2 treatments (400ppmv, 750ppmv and 1000ppmv). During this time I characterized Rhodomonas sp. cell size, C:N, cellular total lipids, growth rate, cellular chlorophyll a concentrations and carbohydrates. Rhodomonas sp. cell bio-volume and total cellular lipids were the only aspects of Rhodomonas sp. found to be significantly affected by pCO2. On average, Rhodomonas sp. cell bio-volume increased by ~60% and ~100% and total cellular lipids increased by 36% and 50% when cultured under moderate and high pCO2 treatments, respectively, compared to the ambient treatment. To test my second hypothesis, the pCO2-acclimated Rhodomonas sp. were fed to four microzooplankton species, two tintinnid ciliates (Favella ehrenbergii (recent name change to Schmidingerella sp.) and Coxliella sp.) and two heterotrophic dinoflagellates (Gyrodinium dominans and Oxyrrhis marina). Two experimental designs were used to test whether microzooplankton grazing and growth are affected by OA through changes in prey state. My data confirm my hypothesis that microzooplankton grazing is affected by OA-induced changes to their prey. In three out of the four grazers tested, short term ingestion rates were either higher or non-linear when grazers fed on moderate and high pCO2 acclimated Rhodomonas sp., compared to the ambient treatment cells. Using multiple linear regression models to test for the factors that explain the observed variation in microzooplankton short term ingestion rates across pCO2 treatments, prey cell bio-volume explained 43, 82 and 88% of the variability in short term grazing rates for O. marina, G. dominans and F. ehrenbergii, respectively. In contrast to the short term grazing results, I found that during long term grazing experiments, G. dominans and Coxliella sp. grazed ambient pCO2 acclimated Rhodomonas sp. significantly faster than moderate and high cultured cells. O. marina demonstrated a non-linear feeding response in both short and long term grazing experiments, where O. marina ingested moderate pCO2 acclimated Rhodomonas sp. faster than ambient and high pCO2 acclimated prey. Microzooplankton growth rates were higher for all microzooplankton species when feeding on Rhodomonas sp. cultured under moderate and high pCO2 compared to ambient pCO2 diets. G. dominans and Coxliella sp. were the only grazers that demonstrated a difference in GGE across treatments, showing increased GGE when feeding on prey cultured under elevated pCO2. These findings validate my hypothesis that OA-induced changes in Rhodomonas sp. morphology and biochemistry affects microzooplankton grazing and growth. If the alteration of phytoplankton morphology and nutritional quality observed in this study is wide spread across phytoplankton taxa under OA, and this, in turn, affects microzooplankton grazing and growth dynamics as seen here, it will serve as a mechanism to alter future biogeochemical processes in pelagic marine food webs.
Download or read book Oceanic Abstracts written by and published by . This book was released on 1997-10 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Use of Taxon specific Pigments for Measuring Nutrient Limitation Composition Growth and Grazing Rates of Phytoplankton written by Louise Schlüter and published by . This book was released on 1997 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Report of the Hakuh Maru Cruise written by and published by . This book was released on 1998 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICES Zooplankton Methodology Manual written by Roger Harris and published by Elsevier. This book was released on 2000-02-14 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term "zooplankton" describes the community of floating, often microscopic, animals that inhabit aquatic environments. Being near the base of the food chain, they serve as food for larger animals, such as fish. The ICES (International Council for the Exploration of the Sea) Zooplankton Methodology Manual provides comprehensive coverage of modern techniques in zooplankton ecology written by a group of international experts. Chapters include sampling, acoustic and optical methods, estimation of feeding, growth, reproduction and metabolism, and up-to-date treatment of population genetics and modeling. This book will be a key reference work for marine scientists throughout the world. Sampling and experimental design Collecting zooplankton Techniques for assessing biomass and abundance Protozooplankton enumeration and biomass estimation New optical and acoustic techniques for estimating zooplankton biomass and abundance Methods for measuring zooplankton feeding, growth, reproduction and metabolism Population genetic analysis of zooplankton Modelling zooplankton dynamics This unique and comprehensive reference work will be essential reading for marine and freshwater research scientists and graduates entering the field.
Download or read book The influence of grazing on the estimation of phytoplankton growth rate via cell cycle analysis written by J. CHANG and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pigment specific growth and grazing rates of phytoplankton in the central equatorial Pacific written by M. LATASA and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Cyanobacteria written by Loïc Charpy and published by Musee Oceanographique. This book was released on 1999 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Species specific Phytoplankton Growth Rates by Cell Cycle Analysis written by Jeng Chang and published by . This book was released on 1989 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The influence of nutrient addition on growth rates of phytoplankton groups and microzooplankton grazing rates in a mesocosm experiment written by L. SCHLUTER 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 Analysis of Zooplankton Grazing Rates and the Effect of Grazing on Phytoplankton Populations written by Nathaniel R. Brindza and published by . This book was released on 2002 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
