Dataset: Effects of flooding and nutrients on Spartina patens and Sagittaria lancifolia soil shear strength: a greenhouse study

This dataset is from a greenhouse study on the effects of flooding and nutrient-enrichment on two marsh plant species common to Louisiana. The greenhouse study tested the effects of flooding (5, 45, and 90% time flooded) and nutrients (control and 2 mgN/L + 0.1 mgP/L) on growth and strength of Sporobolus pumilus and Sagittaria lancifolia. Sporobolus at higher elevation had higher aboveground biomass and higher shear strength than at low elevation. Measurements include above-and belowground biomass and soil shear stength., To test the hypothesis that Sporobolus and Sagittaria differ in their response to flooding and nutrient-enrichment, we conducted a controlled greenhouse experiment. Plant material was collected from a Sporobolus dominated marsh in Sabine National Wildlife Refuge, Calcasieu, Louisiana in the Chenier Plain region of Louisiana where large robust stands of Sporobolus occur.  Sagittaria plants were collected from an intermediate marsh in Barataria Bay. At each site 48 PVC plant plugs of each species (15.5 cm diameter and 30 cm deep) were collected and transported to the Louisiana State University greenhouses. The plugs consisted of 27 clay Sporobolus,19 organic Sporobolus and 48 Sagittaria. Sporobolus samples were separated later on at greenhouse by either clay or organic. Core locations were chosen haphazardly to get a random sample of the area. Aboveground biomass in each plug were clipped to the soil surface prior to collection.  
Ninety-six plants were placed in one of eight tanks each o..., , # Dataset: Effects of flooding and nutrients on Spartina patens and Sagittaria lancifolia soil shear strength: a greenhouse study

[https://doi.org/10.5061/dryad.k3j9kd5h9](https://doi.org/10.5061/dryad.k3j9kd5h9)

## Description of the data and file structure

Specification: [https://creativecommons.org/publicdomain/zero/1.0/](https://creativecommons.org/publicdomain/zero/1.0/); the authors respectfully request to be contacted by researchers interested in the re-use of these data so that the possibility of collaboration can be discussed.

Suggested Citation:

```
Quirk, T., N. Matherne, and G. Mariotti. 2024. Data for the article \"Dataset: Effects of flooding and nutrients on Spartina patens and Sagittaria lancifolia soil shear strength: a greenhouse study\", Dryad, doi.org/10.5061/dryad.k3j9kd5h9
```

**Contact Information**

\* Name: Tracy Quirk
\* Affiliations: Department of Oceanography and Coastal Sciences, Louisiana State University
\* ORCID ID: [https://orcid.org/0000-0002-2068-5...