Work Description

Title: Hydrologic flushing rates drive nitrogen cycling and plant invasion in a freshwater coastal wetland model Ecological Applications EAP20-0253 Reproducable Data Archive Open Access Deposited
Attribute Value
  • This dataset includes input and output ASCII files for a free ecosystem simulation model, MONDRIAN. When all inputs are entered into the model interface and once the model has completed, all model output is tabulated in a output ASCII file. Description of these data are provided within the ASCII file (each column of data has a description in the first rows of each .txt file) and in the .docx User Guide provided. Please refer to the 'readme' file for more information.
  • Coastal wetlands intercept significant amounts of nitrogen (N) from watersheds, especially when surrounding land cover is dominated by agriculture and urban development. Through plant uptake, soil immobilization, and denitrification wetlands can remove excess N from flow through water sources and mitigate eutrophication of connected aquatic ecosystems. Excess N can also change plant community composition in wetlands, including communities threatened by invasive species. Understanding how variable hydrology and N loading impact wetland N removal and community composition can help attain desired management outcomes, including optimizing N removal and/or preventing invasion by non-natives. By using a dynamic, process-based ecosystem simulation model, we are able to simulate various levels of hydrology and N loading that would otherwise be difficult to manipulate. We investigate the effects of hydroperiod, hydrologic residence time, N loading, and the NH4+:NO3- ratio on both N removal and the invasion success of two non-native species (Typha x glauca or Phragmites australis) in temperate freshwater coastal wetlands using Mondrian, a process-based, wetland ecosystem simulation model. We found that when residence time increased, annual N removal increased up to 10-fold while longer hydroperiods also increased N removal, but only when residence time was >10 days and N loading was >30 g N m-2 y-1. N removal efficiency also increased with increasing residence time and hydroperiod, but was less affected by N loading. However, longer hydrologic residence time increased vulnerability of wetlands to invasion by both invasive plants at low to medium N loading rates where native communities are typically more resistant to invasion. This suggests a potential tradeoff between ecosystem services related to nitrogen removal and wetland invasibility. These results help elucidate complex interactions of community composition, N loading and hydrology on N removal, helping managers to prioritize N removal when N loading is high or controlling plant invasion in more vulnerable wetlands.
Contact information
Funding agency
  • Other Funding Agency
Other Funding agency
  • NASA Earth Sciences
ORSP grant number
  • 80NSSC17K0262
Date coverage
  • 2020-01-10
Citations to related material
Resource type
Last modified
  • 08/25/2020
  • 08/25/2020
To Cite this Work:
Sean Sharp (2020). Hydrologic flushing rates drive nitrogen cycling and plant invasion in a freshwater coastal wetland model Ecological Applications EAP20-0253 Reproducable Data Archive [Data set]. University of Michigan - Deep Blue.


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