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Research Application ID:  GCE-16-2011 (submitted: 06/27/2011, status: approved)

Provide a brief title for web display

Long-term Nutrient (N, P) Additions to a Tidal Freshwater Marsh

Investigator Information

On Island Sponsor: GCE SINERR UGAMI GADNR

Principal Investigator: Christopher B. Craft
Home Institution: Indiana University at Bloomington
Award Information: (not specified)
Mailing Address: Indiana University - School of Public and Environmental Affairs Phone Number: (812) 856-1837
  Room 408. MSB II. E-mail Address: ccraft@indiana.edu
  Bloomington, Indiana 47405  
Co-investigators: Ellen Herbert (Ducks Unlimited)

Briefly describe the project goals and methodology

Evaluate the effects of long-term (>5 years) additions of nitrogen (N), phosphorus (P) and N+P on a Zizaniopsis milacea tidal freshwater marsh

Where will the project be located?

GCE site 7 - Hammersmith Creek

How will you provide GPS coordinates for study sites?

I will arrange with my research sponsor to collect and register GPS coordinates

What are the expected start and end dates of the project?

Start Date:  03/15/2004 End Date:  (ongoing)

How many people will access the site and at what frequency?

Three to 4 people, three times a year (two times for 15 minutes to fertilize, one time for 3-4 hours to sample).

Keywords that describe your project

Taxonomic/Functional group: plants

Organisms: Zizaniopsis

Habitat type: marsh, freshwater wetlands

Measurements: biomass, nutrients

Study theme: plant ecology, primary production, nutrient chemistry

Likely long-term impacts of the study: fertilization

What equipment will be deployed in the field?

One inch diameter pvc poles (2 meters in height) to demarcate plots. 16 plots with 4 poles each equals 64 poles total.

Will plants or animals be collected as part of this study?

Biomass is non-destructively samples in permanent plots. Five green leaves are clipped from each plot annually to measure leaf C, N and P.

What are the likely impacts of the project on the site?

Plots are relatively small (2 m by 2 m) so no long-term, large scale impacts expected. Expect to see enhanced aboveground biomass (and perhaps declining species richness) in N fertilized plots

Will the project design include boardwalks? If not, explain why not.

No. We make infrequent visits with few people so that the foot paths recover between visits.

How long will impacts persist after the research is concluded?

Small (2 meter by 2 meter) areas (N-treated plots) may exhibit high aboveground biomass for several years after nutrient additions cease.

Study Area Map:

Files attached to this application

GCE-16-2011_Documents_Wetland_Fertilization_Experimental_Design_(2011).doc  (MS Word file, 35 kb, submitted 06/27/2011)

GCE-16-2011_Maps_Craft_Herbert_GCE7_N-P_2011.kml  (KML file, 3.83 kb, submitted 03/05/2012)

LTER
NSF

This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959, OCE-1237140, OCE-1832178 and OCE-2425396. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.