The Role Of Host Microbiomes In Modulating Phytoplankton Community Dynamics And Ecosystem Functioning Under Abiotic Stressors PDF Download
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Author | : Nikki Michaela Mercer |
Publisher | : |
Total Pages | : 0 |
Release | : 2022 |
Genre | : |
ISBN | : |
Download The Role of Host Microbiomes in Modulating Phytoplankton Community Dynamics and Ecosystem Functioning Under Abiotic Stressors Book in PDF, ePub and Kindle
With increasing anthropogenic stressors affecting aquatic systems, it is becoming crucial to understand what factors promote and maintain phytoplankton populations and communities. Previous research shows that variation within phytoplankton microbiomes affects pairwise species interactions, but the full extent of the impacts that host microbiomes have on species-rich algal communities is not known. Our research aims to test if greater diversity in host-associated microbiomes increases algal community diversity and ecosystem functioning. Furthermore, our research goal is to determine if increased diversity in host-microbiomes will have a stronger effect on these metrics under more stressful conditions, including nutrient-depleted and warmer environments. This was tested by growing cultures consisting of five species of green eukaryotic algae in varying temperature, phosphorus, and microbiome diversity treatments for six weeks. Overall, our data did not support our hypotheses as cultures inoculated with the highest microbiome diversities did not promote the highest levels of algal community richness or biomass. Additionally, higher bacterial diversity did not mitigate the negative effects of phosphorus or temperature stress for algal communities. Our work empirically concludes that host microbiome composition is a critical factor that influences algal community dynamics and ecosystem functioning, and that it is environmentally dependent. This work develops our understanding of the various biotic and abiotic factors that govern species community composition, which will allow us to better predict how anthropogenic disturbances may affect our natural aquatic systems.
Author | : Graham P. Harris |
Publisher | : Springer Science & Business Media |
Total Pages | : 504 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9400931654 |
Download Phytoplankton Ecology Book in PDF, ePub and Kindle
Author | : Stéphane Karasiewicz |
Publisher | : |
Total Pages | : 0 |
Release | : 2017 |
Genre | : |
ISBN | : |
Download The Phytoplankton Community Response(s) to Global Changes and Their Effect(s) on Ecosystem Functioning with a Special Focus on Phaeocystis Spp, a Harmful Algae Book in PDF, ePub and Kindle
Coastal ecosystems, the interfaces between land and sea, are subject to climate change and high anthropogenic pressure. Consequently, most coastal waters are prone to eutrophication. The phytoplankton require a special attention because of its role of primary producer in marine ecosystems. Recently, Harmful Algae Bloom outbreaks has raised concern worldwide. The thesis aim was to describe and to measure the temporal responses and causalities of the phytoplankton community structure, with the occurrence of a harmful algae, under global changes. To do so, the ecological niche concept and a statistical method were adapted. The Within Outlying Mean Indexes was proposed to refine the Outlying Mean Index analysis by combining its properties with the K-select analysis species marginality decomposition. The subniche dynamics of the species composing the community were studied under environmental conditions hosting low (L) and high (H) Phaeocystis spp. abundance. Subset H was characterized by a large Phaeocystis spp. niche and a high diatom diversity. In subset L, Phaeocystis spp. was subject to great biological constrain suspected to be caused by diatom competition for resources. The phytoplankton diversity productivity was stronger at a seasonal scale than on the long-term. The resource imbalance had no direct link with productivity in the long-term. The long-term invasive species success and its impact on productivity is favored by successive cold years with high resource imbalance which rise the number of small species and its bloom. I finally discussed on the methodological improvements, the potential use of the trait-based approach, and possible experimental set-ups to support the thesis results.
Author | : Xavier Mayali |
Publisher | : Frontiers Media SA |
Total Pages | : 227 |
Release | : 2018-06-06 |
Genre | : |
ISBN | : 2889454959 |
Download Metabolic Interactions Between Bacteria and Phytoplankton Book in PDF, ePub and Kindle
The cycling of energy and elements in aquatic environments is controlled by the interaction of autotrophic and heterotrophic processes. In surface waters of lakes, rivers, and oceans, photosynthetic microalgae and cyanobacteria fix carbon dioxide into organic matter that is then metabolized by heterotrophic bacteria (and perhaps archaea). Nutrients are remineralized by heterotrophic processes and subsequently enable phototrophs to grow. The organisms that comprise these two major ecological guilds are numerous in both numbers and in their genetic diversity, leading to a vast array of physiological and chemical responses to their environment and to each other. Interactions between bacteria and phytoplankton range from obligate to facultative, as well as from mutualistic to parasitic, and can be mediated by cell-to-cell attachment or through the release of chemicals. The contributions to this Research Topic investigate direct or indirect interactions between bacteria and phytoplankton using chemical, physiological, and/or genetic approaches. Topics include nutrient and vitamin acquisition, algal pathogenesis, microbial community structure during algal blooms or in algal aquaculture ponds, cell-cell interactions, chemical exudation, signaling molecules, and nitrogen exchange. These studies span true symbiosis where the interaction is evolutionarily derived, as well as those of indirect interactions such as bacterial incorporation of phytoplankton-produced organic matter and man-made synthetic symbiosis/synthetic mutualism.
Author | : Leticia Chamelete de Vilhena |
Publisher | : |
Total Pages | : 124 |
Release | : 2013 |
Genre | : |
ISBN | : |
Download Physical-biological Coupling in Aquatic Ecosystems Book in PDF, ePub and Kindle
Phytoplankton form the basis of aquatic food webs and are responsible for almost half of the Earth's primary production. They represent an important indicator of water quality and are extremely sensitive to climate change. Physical processes in water bodies affect ecosystem functioning in a number of ways and phytoplankton readily respond to alterations in the physical environment. Hence, a deep knowledge of hydrodynamics and physical-biological coupling mechanisms in aquatic ecosystems is essential in understanding the structure of ecological communities and elucidating phytoplankton growth and succession patterns, which is of paramount importance for water quality management, especially in the light of a changing climate. This study explored the hydrodynamic mechanisms underlying phytoplankton community composition and responsible for maintaining bioproductivity in three very distinct aquatic systems: Lake Burragorang, Swan-Canning Estuary (both in Australia), and Lake Iseo (Italy). This was achieved through an integrated approach combining field data and three-dimensional modelling. Lake Burragorang is a reservoir formed in 1960 that represents the biggest water supply source to Sydney (Australia). This work has shown that low water levels as a consequence of climate change combined with an extreme rainfall event and associated high inflow volumes were responsible for a major cyanobacteria bloom that was the only algal bloom registered in the history of the reservoir. In the Swan-Canning Estuary, a highly urbanised micro-tidal salt-wedge estuary located in Perth (Australia), phytoplankton succession and the formation of algal blooms were shown to be strongly controlled by the timing and magnitude of freshwater inflows and their consequences to residence time, water column stratification, and salinity concentrations. Lastly, the work in Lake Iseo, a large, deep, and strongly stratified sub-alpine lake in Lombardy (Italy), has conclusively shown that the energy transfer from basin-scale internal waves down to high-frequency nonlinear internal waves is significant, implying nonlinear and nonhydrostatic processes need to be considered in order to accurately predict ecological responses to physical forcing. This is extremely important in deep, meromictic systems, where the breaking of high-frequency internal waves and resulting boundary mixing are most likely the main mechanisms of communication between hypolimnetic and epilimnetic waters, strongly controlling phytoplankton productivity in the euphotic layer. This study brings new insights into proper management strategies and demonstrates a thorough comprehension of physical-biological coupling mechanisms is crucial in order to understand and predict how different aquatic ecosystems will respond to extreme events and climate change.
Author | : Ajit Varma |
Publisher | : Springer Science & Business Media |
Total Pages | : 672 |
Release | : 2004-03-24 |
Genre | : Science |
ISBN | : 9783540009238 |
Download Plant Surface Microbiology Book in PDF, ePub and Kindle
This volume examines the interactions between plants and microorganisms located on plant surfaces, exploring their possible biotechnological applications. Interactions of microbial communities with plants are illustrated by experimental studies of typical symbiosis. Topics include signaling within a symbiosis, molecular differences between symbiotic and pathogenic microorganisms, and the role of microorganisms in the development of plants.
Author | : Rima Franklin |
Publisher | : Springer Science & Business Media |
Total Pages | : 339 |
Release | : 2007-09-04 |
Genre | : Science |
ISBN | : 1402062168 |
Download The Spatial Distribution of Microbes in the Environment Book in PDF, ePub and Kindle
This volume highlights recent advances that have contributed to our understanding of spatial patterns and scale issues in microbial ecology. The book brings together research conducted at a range of spatial scales (from μm to km) and in a variety of different types of environments. These topics are addressed in a quantitative manner, and a primer on statistical methods is included. In soil ecosystems, both bacteria and fungi are discussed.
Author | : Yonghong Wu |
Publisher | : Elsevier |
Total Pages | : 436 |
Release | : 2016-08-29 |
Genre | : Science |
ISBN | : 0128013230 |
Download Periphyton Book in PDF, ePub and Kindle
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
Author | : David C. Sigee |
Publisher | : John Wiley & Sons |
Total Pages | : 516 |
Release | : 2005-09-27 |
Genre | : Science |
ISBN | : 0470026472 |
Download Freshwater Microbiology Book in PDF, ePub and Kindle
This unique textbook takes a broad look at the rapidly expanding field of freshwater microbiology. Concentrating on the interactions between viruses, bacteria, algae, fungi and micro-invertebrates, the book gives a wide biological appeal. Alongside conventional aspects such as phytoplankton characterisation, seasonal changes and nutrient cycles, the title focuses on the dynamic and applied aspects that are not covered within the current textbooks in the field. Complete coverage of all fresh water biota from viruses to invertebrates Unique focus on microbial interactions including coverage of biofilms, important communities on all exposed rivers and lakes. New information on molecular and microscopical techniques including a study of gene exchange between bacteria in the freshwater environment. Unique emphasis on the applied aspects of freshwater microbiology with particular emphasis on biodegradation and the causes and remediation of eutrophication and algal blooms.
Author | : |
Publisher | : Academic Press |
Total Pages | : 346 |
Release | : 2016-08-03 |
Genre | : Science |
ISBN | : 0128096179 |
Download Host-Microbe Interactions Book in PDF, ePub and Kindle
Host-Microbe Interactions, the latest volume in the Progress in Molecular Biology series, provides a forum for the discussion of new discoveries, approaches, and ideas in molecular biology. It contains contributions from leaders in their respective fields, along with abundant references. This volume is dedicated to the subject of host-microbe interactions. Provides the latest research on host-microbe interactions, including new discoveries, approaches, and ideas Contains contributions from leading authorities on topics relating to molecular biology Informs and updates on all the latest developments in the field