Biogeomorphology of an upper Chesapeake Bay river-mouth tidal freshwater marsh

  title={Biogeomorphology of an upper Chesapeake Bay river-mouth tidal freshwater marsh},
  author={Gregory B. Pasternack and William B. Hilgartner and Grace S. Brush},
Field mapping and monitoring of vegetation, sedimentation patterns, substrate characteristics, and geomorphology in the Bush River tributary to upper Chesapeake Bay has been conducted since 1991 to ascertain the process-morphology dynamics in a tidal freshwater marsh. Nine plant associations from 5 distinct marsh habitats were identified by clustering species abundance measurements from 115 quadrats throughout an 84-hectare area. High spatial variability in physical habitat conditions such as… 
Seasonal Variations in Sedimentation and Organic Content in Five Plant Associations on a Chesapeake Bay Tidal Freshwater Delta
Research on sedimentation processes in tidal freshwater marshes is lagging far behind that for salt marshes despite the imponance of tidal freshwater systems for understanding impacts of watershed
Vegetation Dynamics in a Tidal Freshwater Wetland: A Long-Term Study at Differing Scales
Tidal freshwater wetlands are complex, species-rich ecosystems located at the interface between tidal estuaries and nontidal rivers. This study conducted on the Patuxent River estuary in Maryland was
Sedimentary processes and products in a mesotidal salt marsh environment: insights from Groves Creek, Georgia
Southeastern salt marshes are important repositories of sediment and carbon, and their formation is heavily dependent on deposition and accumulation of inorganic sediment. This study examined Groves
Dynamics of Marsh‐Derived Sediments in Lagoon‐Type Estuaries
Salt marshes are valuable ecosystems that must trap sediments and accrete in order to counteract the deleterious effect of sea level rise. Previous studies have shown that the capacity of marshes to
Patterns of seed bank and vegetation diversity along a tidal freshwater river.
These findings suggest that suites of common species contributed to high localized vegetation diversity, yet large spatial scales maximized the number and diversity of species in the seed bank and vegetation through rare encounters, as well as the complexity of the landscape.
Effects of annual and perennial community dynamics on tidal freshwater marsh ecosystem functioning
Dissertation title: EFFECTS OF ANNUAL AND PERENNIAL COMMUNITY DYNAMICS ON TIDAL FRESHWATER MARSH ECOSYSTEM FUNCTIONING Kristine Noel Hopfensperger, Doctor of Philosophy, 2007 Dissertation directed
Beaver in Tidal Marshes: Dam Effects on Low-Tide Channel Pools and Fish Use of Estuarine Habitat
  • W. Hood
  • Environmental Science
  • 2012
Current Chinook recovery efforts focus on restoring herbaceous zone tidal marsh for rearing juveniles, but this focus overlooks presently rare and poorly understood habitat, like tidal shrub marsh, that was historically common and likely important to beaver and small estuarine or anadromous fish.
Influence of tidal range on the stability of coastal marshland
[1] Early comparisons between rates of vertical accretion and sea level rise across marshes in different tidal ranges inspired a paradigm that marshes in high tidal range environments are more
Conservation of tidal freshwater wetlands in North America
In the USA, significant losses of tidal and non-tidal wetlands occurred until legislation at various levels of government began to slow the rate of losses. Primarily because of their location in the


Sedimentation cycles in a river-mouth tidal freshwater marsh
Tidal freshwater marshes are critical buffers that exist at the interface between watersheds and estuaries. Little is known about the physical dynamics of tidal freshwater marsh evolution. Over a
Patterns of sediment deposition in subsiding coastal salt marshes, Terrebonne Bay, Louisiana: The role of winter storms
High rates of wetland loss in the Mississippi deltaic plain have been attributed to a combination of insufficient marsh sedimentation and relative sea-level rise rates of over 1.2 cm yr−1. This study
Nutrient and metal accumulation in a freshwater tidal marsh
Stratigraphic records from sediment cores collected in a freshwater tidal marsh and in the estuary upstream and downstream from the marsh were used to determine the accumulation of nutrients and
Understanding salt-marsh accretion, Scolt Head Island, Norfolk, England
Measurements of surface sediment accretion have been obtained for Hut Marsh, Scolt Head Island, Norfolk, England, using sand marker horizons. More than eighty 1-m2 marker sites were deployed in
The Development of a Tidal Marsh: Upland and Oceanic Influences
Results showed that tidal marsh sections can provide sensitive records of both upland and marsh vegetation histories, pollen and macrofossil records can be closely linked to tide—gauge records and are responsive to short—term changes in sea level with a high degree of temporal resolution, and upland influences can play an important role in determining the course of plant succession in the intertidal environment.
Historically, tidal freshwater environments have been ignored by limnologists because of the presence of oceanic tidal influence, and neglected by marine ecologists because they are bathed by freshwater and inhabited primarily by freshwater organisms.
The ecology of tidal freshwater marshes of the United States East Coast: a community profile
Tidal freshwater marshes are a distinctive type of estuarine ecosystem located upstream from tidal saline marshes and downstream from non-tidal freshwater marshes. They are characterized by
Primary production and seasonal aspects of emergent plants in a tidal freshwater marsh
Seasonal changes in aboveground plant biomass, cover, and frequency were monitored in Sweet Hall Marsh, a tidal freshwater marsh located on the Pamunkey River, Virginia, during the 1974 growing season, revealing an annual succession of plant species from spring to fall.
Rates of sediment accumulation in a tidal freshwater marsh
ABSTRACT Rates of sediment accumulation were determined for a Delaware River tidal freshwater marsh utilizing radiometric, palynological and sediment flux estimating techniques plus historical
The paleoecological development of a late holocene, tidal freshwater marsh of the Upper Delaware River estuary
Changes in groundwater tables brought about by sea level increases in the Delaware River Basin (near Philadelphia) about 2,500 years B.P., initiated wetland development at the Princeton-Jefferson