2 edition of Nitrogen, phosphorus, and carbon flux in Chesapeake Bay marshes found in the catalog.
Nitrogen, phosphorus, and carbon flux in Chesapeake Bay marshes
Donald M. Axelrad
by Virginia Water Resources Research Center, Virginia Polytechnic Institute and State University in Blacksburg
Written in English
Bibliography: p. 49-57
|Statement||Donald M. Axelrad, Kenneth A. Moore, and Michael E. Bender.|
|Series||Bulletin - Virginia Water Resources Research Center ;, 79, Bulletin (Virginia Water Resources Research Center) ;, 79.|
|Contributions||Moore, Kenneth A., joint author., Bender, Michael E., joint author.|
|LC Classifications||TD201 .V57 no. 79, GB857.2.C4 .V57 no. 79|
|The Physical Object|
|Pagination||viii, 182 p. :|
|Number of Pages||182|
|LC Control Number||76623767|
Priority agricultural watersheds were computed by Chesapeake Bay Program partners using nutrient SPARROW model results. The identification of priority agricultural watersheds helped to direct Chesapeake Bay Stewardship Fund grants to areas that contribute the greatest yields of total nitrogen and total phosphorus to Chesapeake Bay (National Fish and Wildlife Foundation, ). Exchange Rates for Carbon, Nitrogen, and Phosphorus in the Trinity River Delta Marshes [Neal A. Armstrong] on *FREE* shipping on qualifying : Neal A. Armstrong.
This overlying sediment was separated from the clay layer and then dried, weighed, and analyzed for its total carbon (C), nitrogen (N), and phosphorus (P) content. Mean C accumulation rates ranged from 61 to gm −2 yr −1, N accumulation rates ranged from to gm −2 yr −1, and P accumulation rates ranged from to 4. Responses of estuarine and coastal marine phytoplankton to nitrogen and phosphorus enrichment a in estuarine and coastal marine systems were strongly dependent on the mean concentrations of total nitrogen and total phosphorus in the water column. Local and regional disturbances associated with the invasion of Chesapeake Bay marshes by.
Understanding trends in stream chemistry is critical to watershed management, and often complicated by multiple contaminant sources and landscape conditions changing over varying time scales. We adapted spatially-referenced regression (SPARROW) to infer causes of recent nutrient trends in Chesapeake Bay tributaries by relating observed fluxes during , , and to contemporary inputs. Differences in nitrogen and phosphorus pools between watershed inputs and lower estuary exports suggest that the Mullica River–Great Bay estuarine system serves an important role in the cycling of dissolved nitrogen and phosphorus, ultimately controlling the fraction of organic and inorganic nitrogen and phosphorus delivered to the coastal zone.
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This study analyzed the variations of soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) with depth in coastal wetlands of Laizhou Bay, Bohai Sea. Get this from a library. Nitrogen, phosphorus, and carbon flux in Chesapeake Bay marshes.
[Donald M Axelrad; Kenneth A Moore; Michael E Bender]. Bulletin 79 Jan uary Nitrogen, Phosphorus and Carbon Flux in Chesapeake Bay Marshes. Donald 1Vl. Axelrad Kenneth A.
Moore and Michael E. Bender Virgin ia Institute of Marine. •Total Nitrogen concentrations are continuing to decline at most discharges. •But at very high flows they are showing some increase. •Flow-normalized flux continues to fall.
Down about 16% since its high in •Year to year variability in actual TN flux is increasing (standard deviation about double for vs.
Estimates indicate that, on average, the Susquehanna River contributed nearly 47 percent of the freshwater and 41 percent of the nitrogen, 25 percent of the phosphorus, and 27 percent of the sediment load to the Chesapeake Bay during – (Gary Shenk, U.S.
Environmental Protection Agency, written commun., ).Cited by: 1 Introduction. Located at the intersection between land and ocean, estuaries play an important role in global carbon and biogeochemical cycles [Bauer et al., ; Bianchi and Bauer, ; Canuel et al., ].Chesapeake Bay, the largest estuary in the United States, plays a particularly significant role in the transformation and burial of riverine terrestrial nitrogen [Bronk et al., University of Maryland Center for Environmental Science.
The Chesapeake Bay portion of the SLAMM application was extracted previously as part of a study of nitrogen removal by Chesapeake Bay tidal wetlands (Bryan ). Wetlands areas from SLAMM for the year were employed in our model. Chesapeake Bay tidal wetlands totaledhectares. Tidal exchanges of nitrogen, phosphorus, and organic carbon by a high and a low elevation marsh in the Rhode River estuary were measured throughout th.
Exchange of carbon, nitrogen, and phosphorus in Lavaca Bay, Texas Marshes, Volume II, The role of plants in nutrient exchange in the Lavaca Bay brackish marsh system.
Report to the Texas Develop ment Board by the Center for Research in Water. Concentrations of nitrogen, phosphorus, and suspended sediment are measured at the U.S. Geological Survey streamgage at Conowingo Dam at the downstream end of the Susquehanna River Basin in Maryland, where the river flows into the Chesapeake Bay.
Chesapeake Bay receives an estimated x 10 8 kilograms (, metric tons) of nitrogen and x 10 6 kilograms (9, metric tons) of phosphorus annually from its watershed, mainly through its two largest tributaries, the Susquehanna and Potomac Rivers.
Chesapeake Bay York River Basin. Source: Phase Chesapeake Bay Watershed Model Scenario. Figure Model estimated total nitrogen loads delivered to the Chesapeake Bay by major tributary in The major river basins’ model estimated contributions to total phosphorus loads to the Bay in are illustrated in.
Figure • Nitrogen and phosphorus sources to the Eastern Shore landscape are dominantly (greater than 90 percent) agricultural.
• Inputs are more intensive, on average, than in the remainder of the Chesapeake Bay watershed. • Applications of nitrogen and phosphorus to cropland have generally exceeded removal in crops in recent decades. Exchange Rates for Carbon, Nitrogen, and Phosphorus in Nueces and San Antonio Bay Marshes [Armstrong, Neal A.] on *FREE* shipping on qualifying offers.
Exchange Rates for Carbon, Nitrogen, and Phosphorus in Nueces and San Antonio Bay MarshesAuthor: Neal A. Armstrong. Phosphorus has always been a part of the Chesapeake Bay ecosystem. Like nitrogen, phosphorus is an essential nutrient for all plants and like nitrogen, too much phosphorus in the Bay causes algae to grow in large, dense algal blooms, which depletes oxygen for the fish, crabs, and other marine organisms.
The annual flow‐normalized nitrogen flux to the bay from its watershed declined by 14% toMg (metric tons) between anddue primarily (more than 80% of the decline) to reduced point sources. The remainder of the decline was due to reduced atmospheric deposition (13%) and urban nonpoint sources.
the conversion of fixed nitrogen into N 2 gas (Figure 1). Tidal wetlands are a dominant feature on a number of upper Chesapeake Bay subestuaries and have been identified as important sinks of nitrogen and phosphorus via burial of fluvial particulates and marsh-derived organic matter (Merrill and Cornwell ; Malone et al.
Introduction. The water and the nitrogen, phosphorus, and suspended sediment—the three constituents for which there are watershed-specific goals under the Chesapeake Bay Total Maximum Daily Load (TMDL) requirements (U.S.
Environmental Protection Agency, )—that are derived from the Susquehanna River Basin and flow past Conowingo Dam are critically important to the ecological. Seasonal Transformation and Fluxes of Nitrogen, Carbon and Phosphorus in a Tidal Freshwater Marsh David Velinsky1,2, In general, there was a substantial flux of total nitrogen and total phosphorus from the river to the marsh over the year with loads of 4, kg N and 1, kg P per year, respectively.
marshes degrades at different rates. Nitrogen and phosphorus pollution of the Chesapeake Bay cause phytoplankton to increase, which ultimately leads to the process called _____. eutrophication The entire area of land that a river drains is called its __________.
Documenting the flux is crucial to understanding the relative importance of the various inputs and reactions over daily and longer-term (such as seasonal) scales and provides insights into carbon and nitrogen transfer in the system.
Blake took the following steps to create a transect analysis for the Rhode River dissolved organic matter model.Nitrogen, Phosphorus, and Carbon Flux in Chesapeake Bay Marshes. Bulletin Num Virginia Polytechnic Institute and State University, Blacksburg, Virginia.
Google Scholar.1. Introduction  Human alteration of the global nitrogen (N) and phosphorus (P) cycles has contributed to increased coastal eutrophication, harmful algal blooms and alterations in aquatic food webs [Ryther and Dunstan, ; Smil, ; Kemp et al., ].It is generally assumed that P is a limiting nutrient for freshwater eutrophication and N is a limiting nutrient for coastal.