The Effect Of An Extreme Restoration Approach On Microbial Carbon Cycling In A Restored Subtropical Wetland
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The Effect Of An Extreme Restoration Approach On Microbial Carbon Cycling In A Restored Subtropical Wetland
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Author : Cassandra Anne Medvedeff
language : en
Publisher:
Release Date : 2012
The Effect Of An Extreme Restoration Approach On Microbial Carbon Cycling In A Restored Subtropical Wetland written by Cassandra Anne Medvedeff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Comparison of these results with direct C and P additions, suggests char acts as a source of C and P while ash simulates an addition of P. This work highlights the role of disturbance as a determinant of wetland greenhouse gas (GHG) emissions. During succession at restored sites, decreasing P availability with time will reduce gas production leading to increased C storage. Contrasting effects of fire residues indicates that residue proportion (determined by fire frequency and intensity) will determine net C cycling, where C sequestered as char could be offset by elevated GHG production within 1.5 and 7 months in native and restored sites, respectively. These results demonstrate a complex relationship between GHG production, fire, and the alteration of soil nutrient availability, and the need for further investigation to better manage these systems C cycling for GHG mitigation.
Microbial Diversity In Restored Wetlands Of San Francisco Bay
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Author :
language : en
Publisher:
Release Date : 2013
Microbial Diversity In Restored Wetlands Of San Francisco Bay written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Wetland ecosystems may serve as either a source or a sink for atmospheric carbon and greenhouse gases. This delicate carbon balance is influenced by the activity of belowground microbial communities that return carbon dioxide and methane to the atmosphere. Wetland restoration efforts in the San Francisco Bay-Delta region may help to reverse land subsidence and possibly increase carbon storage in soils. However, the effects of wetland restoration on microbial communities, which mediate soil metabolic activity and carbon cycling, are poorly studied. In an effort to better understand the underlying factors which shape the balance of carbon flux in wetland soils, we targeted the microbial communities in a suite of restored and historic wetlands in the San Francisco Bay-Delta region. Using DNA and RNA sequencing, coupled with greenhouse gas monitoring, we profiled the diversity and metabolic potential of the wetland soil microbial communities along biogeochemical and wetland age gradients. Our results show relationships among geochemical gradients, availability of electron acceptors, and microbial community composition. Our study provides the first genomic glimpse into microbial populations in natural and restored wetlands of the San Francisco Bay-Delta region and provides a valuable benchmark for future studies.
Microbial Role In The Carbon Cycle In Tropical Inland Aquatic Ecosystems
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Author : André Megali Amado
language : en
Publisher: Frontiers Media SA
Release Date : 2017-03-15
Microbial Role In The Carbon Cycle In Tropical Inland Aquatic Ecosystems written by André Megali Amado and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-03-15 with Electronic book categories.
Aquatic microorganisms are tidily related to the carbon cycle in aquatic systems, especially in respect to its accumulation and emission to atmosphere. In one hand, the autotrophs are responsible for the carbon input to the ecosystems and trophic chain. On the other hand, the heterotrophs traditionally play a role in the carbon mineralization and, since microbial loop theory, may play a role to carbon flow through the organisms. However, it is not yet clear how the heterotrophs contribute to carbon retention and emission especially from tropical aquatic ecosystems. Most of the studies evaluating the role of microbes to carbon cycle in inland waters were performed in high latitudes and only a few studies in the tropical area. In the prospective of global changes where the warm tropical lakes and rivers become even warmer, it is important to understand how microorganisms behave and interact with carbon cycle in the Earth region with highest temperature and light availability. This research topic documented microbial responses to natural latitudinal gradients, spatial within and between ecosystems gradients, temporal approaches and temperature and nutrient manipulations in the water and in the sediment.
Microbial Diversity And Carbon Cycling In San Francisco Bay Wetlands
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Author :
language : en
Publisher:
Release Date : 2014
Microbial Diversity And Carbon Cycling In San Francisco Bay Wetlands written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Wetland restoration efforts in San Francisco Bay aim to rebuild habitat for endangered species and provide an effective carbon storage solution, reversing land subsidence caused by a century of industrial and agricultural development. However, the benefits of carbon sequestration may be negated by increased methane production in newly constructed wetlands, making these wetlands net greenhouse gas (GHG) sources to the atmosphere. We investigated the effects of wetland restoration on below-ground microbial communities responsible for GHG cycling in a suite of historic and restored wetlands in SF Bay. Using DNA and RNA sequencing, coupled with real-time GHG monitoring, we profiled the diversity and metabolic potential of wetland soil microbial communities. The wetland soils harbor diverse communities of bacteria and archaea whose membership varies with sampling location, proximity to plant roots and sampling depth. Our results also highlight the dramatic differences in GHG production between historic and restored wetlands and allow us to link microbial community composition and GHG cycling with key environmental variables including salinity, soil carbon and plant species.
Recarbonization Of The Biosphere
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Author : Rattan Lal
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-03-28
Recarbonization Of The Biosphere written by Rattan Lal and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-03-28 with Science categories.
Human activities are significantly modifying the natural global carbon (C) cycles, and concomitantly influence climate, ecosystems, and state and function of the Earth system. Ever increasing amounts of carbon dioxide (CO2) are added to the atmosphere by fossil fuel combustion but the biosphere is a potential C sink. Thus, a comprehensive understanding of C cycling in the biosphere is crucial for identifying and managing biospheric C sinks. Ecosystems with large C stocks which must be protected and sustainably managed are wetlands, peatlands, tropical rainforests, tropical savannas, grasslands, degraded/desertified lands, agricultural lands, and urban lands. However, land-based sinks require long-term management and a protection strategy because C stocks grow with a progressive improvement in ecosystem health.
Proceedings Of The Second Workshop On Measurement Of Microbial Activity In The Carbon Cycle Of Aquatic Ecosystems
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Author : Jürgen Overbeck
language : en
Publisher: E. Schweizerbartsche Verlagsbuchhandlung
Release Date : 1984
Proceedings Of The Second Workshop On Measurement Of Microbial Activity In The Carbon Cycle Of Aquatic Ecosystems written by Jürgen Overbeck and has been published by E. Schweizerbartsche Verlagsbuchhandlung this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Science categories.
Wetland Ecosystems
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Author : William J. Mitsch
language : en
Publisher: John Wiley & Sons
Release Date : 2009-04-13
Wetland Ecosystems written by William J. Mitsch and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-04-13 with Technology & Engineering categories.
New focused text introduces readers to wetland ecosystems and systems approaches to studying wetlands With its comprehensive coverage of wetland science, management, and restoration, Mitsch and Gosselink's Wetlands has been the premier reference on wetlands for more than two decades. Now, the coverage of specific wetland ecosystem types from earlier editions of this acclaimed work has been updated, revised, and supplemented with additional content in order to create this new text focusing exclusively on wetland ecosystems. This book now complements Wetlands, Fourth Edition. Following an introduction to ecosystems in general and wetland ecosystems in particular, Wetland Ecosystems examines the major types of wetlands found throughout the world: coastal wetlands, freshwater marshes and forested swamps, and peatlands. The final chapter reviews three fundamental systems approaches to studying wetlands: mesocosms, full-scale experimental ecosystems, and mathematical modeling. This new text features: Updated descriptions of the hydrology, biogeochemistry, and biology of the main types of wetlands found in the world New content introducing general ecosystems, wetland ecosystems, whole ecosystem and mesocosm experiments with wetlands, and systems ecology and modeling A detailed description of the ecosystem services provided by wetlands A broad international scope, including many examples of wetlands located outside North America Two new coauthors offering new perspectives and additional insights into the latest ecosystem and modeling techniques An abundance of illustrations helps readers understand how different biological communities and the abiotic environment in wetland ecosystems interact and function. Tables and text boxes provide at-a-glance summaries of key information. Lastly, each chapter concludes with a list of recommended readings. This text has been designed as an introduction for students and professionals in wetland ecology and management, general ecology, environmental science, and natural resource management.
Effects Of Grazer Exclusion On Carbon Cycling In Created Freshwater Wetlands
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Author : Delanie Spangler
language : en
Publisher:
Release Date : 2019
Effects Of Grazer Exclusion On Carbon Cycling In Created Freshwater Wetlands written by Delanie Spangler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Carbon cycle (Biogeochemistry) categories.
"Wetland ecosystems play a significant role in the global carbon cycle, and yet are increasingly threatened by human development, climate change, and shifts in populations of large grazers. The loss of intact wetland systems heightens the need for effective wetland creation and restoration. However, wetland ecosystems are highly complex, complicating efforts to replace the functionality and delivery of ecosystem services associated with natural wetlands. Increasing waterfowl populations pose a threat to the development and persistence of created wetlands, largely through intensive grazing that can shift vegetation community structure or altogether limit desired plant establishment. This study capitalizes on a long-term herbivore exclusion experiment to evaluate how herbivore management impacts carbon storage in two created wetlands in Western New York State, USA. Changes in plant communities, above- and belowground biomass, soil carbon, and decomposition rates were evaluated in plots with and without the influence of grazers. Grazing reduced vegetation cover by approximately 34% in the height of the growing season, and led to similar reductions in aboveground biomass in a permanently flooded wetland, but had minor impacts in a seasonally flooded wetland. In the permanently flooded wetland, where we also measured fluxes of carbon dioxide and methane, this shift in vegetation resulted in reduced carbon uptake through primary productivity and a 27% reduction in soil carbon. During the summer, carbon fixation in grazer exclusion plots was 49% higher than in control plots, but methane emissions was also 62% higher. Our results suggest that grazers play an important role in vegetation dynamics in created wetlands and as a result shift carbon storage and greenhouse gas production."--Abstract.
Restoration Of Aquatic Ecosystems
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1992-01-01
Restoration Of Aquatic Ecosystems written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992-01-01 with Technology & Engineering categories.
Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
Microbial Communities And Functions Contribute To Plant Performance Under Various Stresses
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Author : Hui Li
language : en
Publisher: Frontiers Media SA
Release Date : 2022-12-02
Microbial Communities And Functions Contribute To Plant Performance Under Various Stresses written by Hui Li and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-12-02 with Medical categories.