At the end of every season a relative estimate is taken in order to  better understand the productivity of the system in various species.  Four of the main salt marsh plant species were focused on,  Spartina alterniflora (tall and short forms) , Distichlis spicata, and Spartina patens.  Along each branch 25 plants are randomly collected on transects that run perpendicularly from the creek bank, either 3 and 4 transects were utilized dependent on the year. The data set includes production values of shoot height, shoot mass, shoot specific mass, and shoot diameter (all described below) for August (end of growing season) from 2004 to 2019.

Abbreviations:

TSA- Spartina alterniflora (tall form)
SSA- Spartina alterniflora (short form)
DS- Distichlis spicata
SP- Spartina patens

Creeks-

Reference creeks are West and Nelson
Nutrient Enriched creeks are Sweeney and Clubhead.  Sweeney has been fertilized every summer from  2004-2012  Clubhead had been fertilized in  2005 and then from 2009-2012.

Definitions-
Shoot height- length of shoot from base to tip including all leaves and flowers measure in centimeters(cm)
Shoot mass- dry massof shoot measured in grams (g)
Shoot specific mass- dry weight of shoot (g) per centimer of shoot length (cm)
Shoot diameter- width of widest part of the stem (mm)

All creeks have 2 branches (left and right) determined by remaining at  confluence of branches and facing upland areas.
Plant transects run perpendicular to  creeks at various points with a front pole at the creek bank and a back pole an the high marsh. Transects are in the order of 1, 2, 4, 3 or blue, green, red, yellow from confluence of branch.
*-Shoot diameter measurements are listed for TSA stems  2008-2012 and for  SSA 2008