Downloads – William Currie

MONDRIAN model

Mondrian is a computer model of wetland community and ecosystem ecology. The name is an acronym for Modes Of Nonlinear Dynamics, Resource Interactions, And Nutrient cycling. It is a complex, spatially explicit, individual-based model initially developed for ecological research. It is used to synthesize and better understand the interactions among plant populations, plant communities including invasive species, and ecosystem processes including nutrient cycling (Currie et al. 2014). Since its initial publication, it has been used for a variety of purposes, each time expanding the model to include more processes and more complex integration across ecological levels of organization (Martina et al. 2016, Goldberg et al. 2017, Sharp et al. 2020).

We designed Mondrian so that it could be used by different research groups to address a wide variety of research questions in different wetland systems. Hundreds of parameters that represent plant traits or environmental drivers can be changed by the user by making simple changes to parameters in input files. Default values are supplied for each parameter.

Open source license

Licensed under the Apache License, Version 2.0 (the “License”); you may not use the Mondrian model files except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Download Mondrian v. 4.3

For a zip file containing the source code (Visual Basic / Visual Studio 2017), an executable version (Mondrian43.exe), and default values of all input files, together with Excel templates for creating and changing input files, download this (3.6 MB): Mondrian43.zip.

Also download the Mondrian User Guide v 4.3. To install and run the model, follow the instructions in the user guide. The user guide also contains detailed information about how processes are modeled in Mondrian.

Publications using the Mondrian model (see Publications):

Currie, W. S., D. E. Goldberg, J. Martina, R. Wildova, E. Farrer, and K. J. Elgersma. 2014. Emergence of nutrient-cycling feedbacks related to plant size and invasion success in a wetland community-ecosystem model. Ecological Modelling 282:69-82.

Elgersma, K.J., J.P. Martina, W.S. Currie, and D.E. Goldberg. 2017. Effectiveness of cattail (Typha spp.) management techniques depends on exogenous nitrogen inputs. Elementa 5:19, DOI: https://doi.org/10.1525/elementa.147

Goldberg, D. E., J. P. Martina, K. J. Elgersma, and W. S. Currie. 2017. Plant Size and Competitive Dynamics along Nutrient Gradients. The American Naturalist 190:229-243.

Martina, J. P., W. S. Currie, D. E. Goldberg, and K. J. Elgersma. 2016. Nitrogen loading leads to increased carbon accretion in both invaded and uninvaded coastal wetlands. Ecosphere 7:e01459. 01410.01002/ecs01452.01459.

Sharp, S. J., K. J. Elgersma, J. P. Martina, and W. S. Currie. 2020. Hydrologic flushing rates drive nitrogen cycling and plant invasion in freshwater coastal wetlands. Ecological Applications Available online, early view.