Plum Island Sound Database

Plum Island Ecosystem LTER Database

http://ecosystems.mbl.edu/pie

Acceptance and utilization of PIE-LTER data requires that:

The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
A copy of any resultant publications should be sent to:

(Principal Investigator)
Ecosystems Center;
Marine Biological Laboratory
Woods Hole, MA 02543

PLUM ISLAND ECOSYSTEM LTER DATABASE

DATA FILE: MAR-RO-TRANSECTS.txt

DOCUMENTATION FILE: MAR-RO-TRANSECTS.doc

YEAR: 1998

PI: Charles Hopkinson

OTHERS: Catherine Schmitt, Nat Weston

BRIEF DESCRIPTION OF DATA FILE:

Marsh vegetation and sediment characteristics at three sites along five transects.

KEYWORDS: marsh, vegetation, biomass, density, organic, ammonium, vegetation, bulk, porosity, sediment

SITE TYPE: Marsh

RESEARCH LOCATION:

SITE	LAT	LON
MAR-RO-1.1	42.731246410	70.826330150
MAR-RO-1.2	42.730443910	70.826742050
MAR-RO-1.3	42.730104270	70.826899350
MAR-RO-2.1	42.729275240	70.834767120
MAR-RO-2.2	42.729378080	70.835543430
MAR-RO-2.3	42.729443090	70.836007910
MAR-RO-3.1	42.731567200	70.841497280
MAR-RO-3.2	42.731149890	70.842134370
MAR-RO-3.3	42.730737010	70.842783690
MAR-RO-4.1	42.721645790	70.847392110
MAR-RO-4.2	42.721022670	70.847527220
MAR-RO-4.3	42.720123160	70.847735380
MAR-RO-5.1	42.727350830	70.852271810
MAR-RO-5.2	42.727864350	70.852422780
MAR-RO-5.3	42.728260210	70.852528200

EXPERIMENTAL DESIGN AND METHODS:
Relative elevation of the sites were determined by near-simultaneous water depth measurement at slack high tide. Vegetation biomass and density were measured at each station by clipping all vegetation within duplicate quadrats (0.25 m² for alterniflora, 0.1 m² for patens), and counting and weighing the stems. Maximum vegetation height was measured in the field. Marsh sediment cores were obtained for sediment characteristics. Sediment NH4 was determined by a KCl extraction (see ANALYTICAL METHODS). Sediment bulk density was determined by dry weight of a known volume of sediment. Sediment organic matter was measured by weight loss on combustion of sediment to 500 ° C.

NOTES AND COMMENTS:

VARIABLE DESCRIPTION:

STATION = sampling station (transect.site)

STATE X = x coordinates (meters) in MA state plane NAD 83

STATE Y = y coordinates (meters) in MA state plane NAD 83

LAT = Latitude in NAD 83 geographic coordinates (decimal degrees)

LON = Longitude in NAD 83 geographic coordinates (decimal degrees)

DIST = distance from tidal creek along transect (m)

ELEV = relative elevation of marsh surface (cm)

VEG = dominant vegetation type (alterniflora = Spartina alterniflora; short alterniflora = Spartina alterniflora short-form; patens = Spartina patens)

DEN = vegetation density (m^-2)

DEN SE = standard error of the density measurements

BIO = vegetation biomass (g m^-2)

BIO SE = standard error of the biomass measurements

HT = maximum height of vegetation (cm)

HT SE = standard error of height measurements

NH4 = sediment porewater + exchangeable ammonium to 50 cm (µmols cm^-3)

POR = sediment porosity to 50 cm (g cm^-3)

BD = sediment bulk density (g cm^-3)

% OM = percent organic content of the sediment to 50 cm

CALCULATIONS:

FOR MORE INFORMATION, CONTACT:

Charles Hopkinson

OTHER DATA FILES TO REFERENCE:

REFERENCE CITATIONS:

DATA AVAILABILITY STATUS:

Type 1

ARCHIVE INFORMATION:

Date of entry: July 17, 2000

Data entered by: N. Weston

Comments: