Download or read book Nutrients and Productivity of the Giant Kelp Macrocystis Pyrifera in the Nearshore written by George Anthony Jackson and published by . This book was released on 1976 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nutrients and Productivity of the Giant Kelp Macrocystis Pyrifera in the Nearshore written by George Anthony Jackson and published by . This book was released on 1976 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Patterns in the Productivity of a Giant Kelp Macrocystis Pyrifera Forest written by Richard Carl Zimmerman and published by . This book was released on 1983 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fuels from Biomass Symposium written by John T. Pfeffer and published by . This book was released on 1977 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecophysiological Studies on the Giant Kelp Macrocystis written by William Neilson Wheeler and published by . This book was released on 1978 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survey of Oceanographic and Meteorological Parameters of Importance to the Site Selection of an Ocean Food and Energy Farm OFEF in the Eastern Pacific written by Peter F. Seligman and published by . This book was released on 1977 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Case Studies of Seven Commercial Seaweed Resources written by Maxwell Stanford Doty and published by Food & Agriculture Org.. This book was released on 1987 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seven case studies are presented on commercial seaweed resources; five on wild crops, respectively Ascophyllum nodosum, Chondrus crispus, Gelidium, Laminaria longicruris and Macrocystis, are provided along with case studies of the farmed crops of Eucheuma and Laminaria japonica . Individually the cases range from descriptions of the wild crops and their management to the managed production of farmed crops including, in several examples, some information on economics and/or processing. These initial seven cases range from those emphasizing but one species from but one part of one country, to studies of a genus as it occurs commercially throughout the world.
Download or read book Topical Report on Sources and Systems for Aquatic Plant Biomass as an Energy Resource written by and published by . This book was released on 1977 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FAO Fisheries Technical Paper written by and published by . This book was released on 1987 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthetic and Degradative Processes in Marine Macrophytes written by L. M. Srivastava and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-10-08 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: No detailed description available for "Synthetic and Degradative Processes in Marine Macrophytes".
Download or read book Microbes Among Marine Giants written by and published by . This book was released on 2018 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kelp forest ecosystems are distributed on the rocky reefs of coastal regions worldwide. Kelps (order Laminariales) are a diverse group of brown macroalgae containing numerous species including giant kelp, Macrocystis pyrifera. The giant kelp dominates the kelp forests of southern California, engineering complex three-dimensional habitat which provides foundational shelter, nursery, and nutrients to marine organisms including invertebrates, fish, and marine mammals. While the kelp forests of southern California are well-regarded for their ecological and economic importance, traditional ecological surveys have ignored the most abundant fraction within the ecosystem - microbes. Microbes, including bacteria, archaea, and micro-eukaryotes, are present on all submerged surfaces in marine ecosystems, including microbiomes on macroorganisms. Microbes serve key ecological roles, including cycling of nutrients such as carbon and nitrogen to higher trophic levels within the ecosystem. Host-associated microbes have a symbiotic relationship with the host, providing environmentally-limited nutrients and protection from pathogen invasion in exchange for settlement substrate and host-derived metabolic exudates. Despite the known importance of microbes in marine ecosystems, microbes are absent from classic ecological models describing the top-down and bottom-up regulating forces structuring kelp populations. Thus, for my dissertation I aimed to address the lack of knowledge on the microbial ecology of southern California kelp forests, including the interactions between the predominant macroalgae and the associated microbiomes. In Chapter 1, I established a baseline description of the taxonomic structure and functional potential of microbial communities residing within the Macrocystis pyrifera-dominated kelp forest of Point Loma, CA, and identified sources of variation in microbiome profiles. The Point Loma kelp forest is subject to fluctuations in environmental conditions resulting from seasonality and stratification, which has an influence on kelp forest productivity. However, the potential direct and indirect effects of altered kelp forest environmental conditions on the microbial community structure and function has yet to be described, and as such I aimed to address this for Chapter 1. I sampled microbiomes from both the M. pyrifera biofilm and the adjacent water column seasonally over a three year investigation (2013-2016). I described the microbiomes in great depth using culture-independent whole genome shotgun metagenomics, and assessed the spatial and temporal variability in microbiome composition, function, and diversity. The microbiomes of the kelp and water were distinct in both taxonomic composition and functional potential. Kelp microbiomes remained stable across vertical depth, did not change significantly across season, and were not influenced by biophysical measurements of the surrounding environmental conditions. In contrast, the water-associated microbiomes varied significantly across depth with distinct community profiles above and below the thermocline stratification, showed significant changes across season, and seasonal changes within microbiome structure were strongly correlated with biophysical measurements of kelp forest productivity. Overall, my results showed that while free-living microbiomes were structured by the surrounding environmental conditions, host factors outweighed environmental factors in structuring hostassociated microbiomes. In Chapter 2, I examined the potential shifts in the baseline kelp forest microbiomes resulting from disturbance caused by the spread of an invasive alga, and the potential microbial influence in the alga's invasion strategy. This investigation took place at Santa Catalina Island within the Channel Islands 40 km offshore southern California, throughout the progression of the species invasion (2014-2018). Catalina Island has historically boasted dense populations of the native alga Macrocystis pyrifera, but has undergone disturbance due to the invasion and spread of invasive alga, Sargassum horneri. Invasive species cause significant alterations to ecosystems with both physical and chemical influences which deter and inhibit recovery of native species; however, whether there is a microbial influence in the invasion strategy of alga S. horneri is unknown. First, I described the microbiome of the invasive S. horneri and compared it to the native M. pyrifera, and found the microbiomes of the two macroalgal species to be distinct; specifically, the S. horneri microbiome was enriched in potentially pathogenic Vibrios. Next, I identified the potential for S. horneri presence to induce changes in the surrounding microbiomes. In 2018 as the native alga M. pyrifera was attempting to recover from disturbance, M. pyrifera and S. horneri existed in an interface at some sites. Where the two were in direct contact, I observed evidence of tissue bleaching and deterioration of the native alga, and investigated whether this detriment was a direct result of microbial pathogens. I did not find evidence of S. horneri microbiome inoculation onto the adjacent M. pyrifera; rather, the bleached M. pyrifera showed dysbiosis where the microbiome was lost completely compared to healthy M. pyrifera individuals nearby. However, I did find evidence of S. horneri microbiome inoculation onto the benthic substrate directly below the invasive alga, which resulted in an enrichment of Vibrios compared to the microbiome from benthic substrate beneath native M. pyrifera, and the enrichment of Vibrios on the benthic substrate occurred concurrently with a lack of native algal recovery at those locations. My findings suggest that the invasive species S. horneri has altered the baseline microbiome structure in the kelp forest, and the induced microbial changes may have an ongoing influence on the native species as they attempt to recover from disturbance. In Chapter 3, I investigated the microbial influence on a key stage of recruitment of the giant kelp, Macrocystis pyrifera. Macroalgae, including kelps, rely on recruitment processes to maintain adult populations and recover from disturbances. During kelp recruitment processes, microscopic propagules are released into the kelp forest water column where they are suspended until settlement onto the benthic substrate. Microscopic propagules are highly susceptible to abiotic conditions including UV irradiation, temperature, and nutrients, and biotic conditions including grazing. However, the influence of microbes on kelp propagule success has not been widely studied. Given that microbes are abundant in marine ecosystems (106 cells per ml of seawater) and are present on every submerged surface, microbes are likely to interact with kelp propagules during recruitment processes. For this investigation I reared M. pyrifera microscopic propagules in laboratory microcosms and exposed them to environmentally-sourced microbial communities within treatments. First, I investigated whether the presence of microbes influenced M. pyrifera propagules, and found that removing microbes in seawater increased propagule recruitment success. I then assessed the propagule success when exposed to a nearshore (Point Loma, CA) microbial community compared to an offshore (Santa Catalina Island, CA) microbial community, at multiple levels of microbial abundance. At the time the experiment was conducted, Catalina Island fostered a pristine kelp forest with lower anthropogenic influence compared to the nearshore Point Loma kelp forest. The nearshore (Point Loma) microbial community treatments yielded similar results to the first experiment, where removing microbes resulted in higher kelp propagule success. In contrast, kelp propagules exposed to offshore (Catalina) microbes had the greatest success when microbes were present at intermediate abundances, rather than removed completely. In both treatments, a microbialization of the seawater resulted in observed morphological detriment to kelp propagules. This study suggests that kelp forest microbes have an influence on a key stage of kelp recruitment, and the composition of the microbial community is important in recruitment success. Collectively, my dissertation shows that microbes influence kelp forest ecosystem dynamics and must be incorporated into future population and community models for a more holistic description of the ecosystem.
Download or read book Seasonal Patterns in the Growth of the Giant Kelp Macrocystis Pyrifera written by Peter D Kirkwood and published by . This book was released on 1978 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by John T. Pfeffer and published by . This book was released on 1977 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Marine Research written by Albert Eide Parr and published by . This book was released on 1937 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oceanography and Marine Biology written by R. N. Gibson and published by CRC Press. This book was released on 2007-06-20 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting the increasing interest in the field and its relevance in global environmental issues, Oceanography and Marine Biology: An Annual Review provides authoritative reviews that summarize results of recent research in basic areas of marine research, exploring topics of special and topical importance while adding to new areas as they arise. This volume, part of a series that regards the all marine sciences as a complete unit, features contributions from experts involved in biological, chemical, geological, and physical aspects of marine science. Including a full color insert and an extensive reference list, the text is an essential reference for researchers and students in all fields of marine science.
Download or read book Catalog of Copyright Entries Third Series written by Library of Congress. Copyright Office and published by Copyright Office, Library of Congress. This book was released on 1977 with total page 1624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Algae of California written by Isabella A. Abbott and published by Stanford University Press. This book was released on 1992-08-01 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a complete, systematic treatment of the marine algae (seaweeds) flora of California. The 726 species treated are each illustrated by a detailed line drawing made from an actual specimen. The two authors have drawn upon their phycological research to offer a definitive representation of benthic marine algae from the Californian coast. The floristic treatment in this first paperback edition should aid accurate and speedy identification of flora due to the improved keys, descriptions, illustrations and more detailed coverage of taxa, and should enhance the reader's knowledge of Californian macro-algae.
