Nitrogen Dynamics and Vegetation Succession in Salt Marshes PDF Download
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Author: Harm Jan Van Wijnen
Publisher:
ISBN: 9789036710763
Category : Marine eutrophication
Languages : en
Pages : 152
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Book Description
Author: Harm Jan Van Wijnen
Publisher:
ISBN: 9789036710763
Category : Marine eutrophication
Languages : en
Pages : 152
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Book Description
Author: Harm van Wijnen
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Taylor Ledford
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 49
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Book Description
Increased anthropogenic nutrient loading of nitrogen (N) and phosphorus (P) to estuaries and bays can lead to eutrophication, anoxia or hypoxia, and/or loss of native or other important species. Coastal salt marshes help to counteract eutrophication by removing excess N through microbially-mediated denitrification. One important factor that regulates salt marsh N removal is vegetation type, which affects sediment N-removal capacity by modifying redox potential and altering the microbial community structure within sediments. Additionally, plant community structure can alter carbon (C) uptake via photosynthesis and C release via sediment oxidation and organic matter degradation. A 1-year field study was conducted in a salt marsh located on Dauphin Island, AL, where we increased N and P inputs by 20 g N m-2 yr-1/ 1.25 g P m-2 yr-1 (low fertilization) and 40 g N m-2 yr-1/2.5 g P m-2 yr-1 (high fertilization) in plots dominated by either Juncus roemerianus (black needlerush) or Spartina alterniflora (smooth cordgrass). Denitrification was 5X higher in unamended J. roemerianus plots versus S. alterniflora, but denitrification in S. alterniflora was more responsive to fertilization, increasing ten-fold while denitrification in J. roemerianus plots did not respond to fertilization. Gross primary productivity (GPP) was marginally higher (~5%) in control plots of J. roemerianus than in control S. alterniflora plots. High fertilization increased GPP by 27% in S. alterniflora plots, however, GPP did not respond to fertilization in J. roemerianus plots. Additionally, ERCO2 was similar across vegetation types in control plots, and did not respond to fertilization in either vegetation type. Net ecosystem exchange was similar in J. roemerianus and S. alterniflora control plots and did not change in response to N and P additions for either vegetation type. Our results illustrate that while both J. roemerianus and S. alterniflora marshes have the capacity to withstand nutrient loading in the Gulf of Mexico via N removal, S. alterniflora dominated marshes may have a greater capacity to mitigate N inputs. Additionally, in a world with higher nutrient inputs and despite higher GPP in S. alterniflora, both vegetation types will continue to sequester C at similar rates.
Author: Bibit Halliday Traut
Publisher:
ISBN:
Category :
Languages : en
Pages : 296
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Book Description
Author: Douglas G. Capone
Publisher: Elsevier
ISBN: 0080558925
Category : Science
Languages : en
Pages : 1759
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Book Description
Since the first edition of Nitrogen in the Environment published in 1983, it has been recognized as the standard in the field. In the time since the book first appeared, there has been tremendous growth in the field with unprecedented discoveries over the past decade that have fundamentally changed the view of the marine nitrogen cycle. As a result, this Second Edition contains twice the amount of information as contained in the first edition. This updated edition is now available online, offering searchability and instant, multi-user access to this important information. *The classic text, fully updated to reflect the rapid pace of discovery*Provides researchers and students in oceanography, chemistry, and marine ecology an understanding of the marine nitrogen cycle*Available online with easy access and search - the information you need, when you need it
Author: M.P. Weinstein
Publisher: Springer Science & Business Media
ISBN: 0306475340
Category : Science
Languages : en
Pages : 862
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Book Description
In 1968 when I forsook horticulture and plant physiology to try, with the help of Sea Grant funds, wetland ecology, it didn’t take long to discover a slim volume published in 1959 by the University of Georgia and edited by R. A. Ragotzkie, L. R. Pomeroy, J. M. Teal, and D. C. Scott, entitled “Proceedings of the Salt Marsh Conference” held in 1958 at the Marine Institute, Sapelo Island, Ga. Now forty years later, the Sapelo Island conference has been the major intellectual impetus, and another Sea Grant Program the major backer, of another symposium, the “International Symposium: Concepts and Controversies in Tidal Marsh Ecology”. This one re-examines the ideas of that first conference, ideas that stimulated four decades of research and led to major legislation in the United States to conserve coastal wetlands. It is dedicated, appropriately, to two then young scientists – Eugene P. Odum and John M. Teal – whose inspiration has been the starting place for a generation of coastal wetland and estuarine research. I do not mean to suggest that wetland research started at Sapelo Island. In 1899 H. C. Cowles described successional processes in Lake Michigan freshwater marsh ponds. There is a large and valuable early literature about northern bogs, most of it from Europe and the former USSR, although Eville Gorham and R. L. Lindeman made significant contributions to the American literature before 1960. V. J.
Author: Scott W. Nixon
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 88
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Book Description
Author: Kasper Elgetti Brodersen
Publisher: Frontiers Media SA
ISBN: 2832501117
Category : Science
Languages : en
Pages : 190
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Book Description
Author: Theodore Paul Winfield
Publisher:
ISBN:
Category : Halophytes
Languages : en
Pages : 102
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Book Description
Author: M. L. Martínez
Publisher: Springer Science & Business Media
ISBN: 3540740023
Category : Science
Languages : en
Pages : 391
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Book Description
In this book, coastal dune specialists from tropical and temperate latitudes cover a wide set of topics, including: geomorphology, community dynamics, ecophysiology, biotic interactions and environmental problems and conservation. The book offers recommendations for future research, identifying relevant topics where detailed knowledge is still lacking. It also identifies management tools that will promote and maintain the rich diversity of the dune environments in the context of continuing coastal development.
