Following is a list of freeware that provides tools and on-line resources to support ecological investigations and restoration projects. Before you access any software or apps, please read our disclaimer and permissions page if you haven't already done so.

By US Environmental Protection Agency. Predicts the fate of various pollutants in aquatic ecosystems, such as nutrients and organic toxicants, and their effects on the ecosystem, including fish, invertebrates, and aquatic plants.

Bioassay Quick Reference Table
By California Department of Toxic Substances Control. This guide is the prototype of a project aimed at creating an index of all the standard bioassays currently being used in the scientific community. Initially includes ASTM standards.

By Forest Resources Systems Institute. BIOPAK (Means, et al. 1994) is a menu-driven package of computer programs for personal computers that calculates the biomass, area, height, length, or volume of plant components (leaves, branches, stem, crown, and roots) using existing prediction equations. It has application in ecosystem studies for calculating biomass allocation, productivity and leaf area; in wildlife and entomology studies for calculating foliage area, and browse (e.g., foliage + small twigs), fruit and inflorescence mass; and fire management for calculating fuels of live plants by size classes.

CADDIS Biological Impairment Identification System
By US Environmental Protection Agency. An online tool that helps investigators in the regions, states and tribes find, access, organize, use and share information to produce causal evaluations in aquatic systems.

Ecopath with Ecosim
By ICLARM and the Fisheries Centre, University of British Columbia. Helps construct and analyze mass-balance models and feeding interactions or nutrient flow in ecosystems. Aquatic ecosystems are emphasized.

Ecosystem Management Decision Support (EMDS)
By US Department of Agriculture, Forest Service. The Ecosystem Management Decision Support (EMDS) system is an application framework for knowledge-based decision support of ecological assessments at any geographic scale. The system integrates a geographic information system (GIS) that provides decision support for a substantial portion of the adaptive management process of ecosystem management.

By US Department of Agriculture, Forest Service. A rendering system for stand- and landscape-scale images. Basic components of an EnVision project include a digital terrain model to define the ground surface, color and texture maps to define ground surface characteristics, and groups of objects or "actors". Scene definitions include background imagery used to add clouds and distant landscape features, model components (e.g. terrain model(s) and polygon overlays), viewpoint and camera characteristics, and foreground imagery used to provide high detail in the image foreground.

EXAMS (Exposure Analysis Modeling System)
By US Environmental Protection Agency, Center for Exposure Assessment Modeling (CEAM). The U.S. EPA's Exposure Analysis Modeling System (EXAMS) for Windows, first published in 1982 (EPA-600/3-82-023), provides interactive computer software for formulating aquatic ecosystem models and rapidly evaluating the fate, transport, and exposure concentrations of synthetic organic chemicals - pesticides, industrial materials, and leachates from disposal sites. EXAMS contains an integrated Database Management System (DBMS) specifically designed for storage and management of project databases required by the software.

FGETS (Food and Gill Exchange of Toxic Substances) (for DOS)
By US Environmental Protection Agency, Center for Exposure Assessment Modeling (CEAM). A FORTRAN simulation model that predicts temporal dynamics of fish whole body concentration (ug chemical/(g live weight fish)) of nonionic, nonmetabolized, organic chemicals that are bioaccumulated from either: (a) water only - the predominant route of exchange during acute exposures, or (b) water and food jointly - characteristic of chronic exposures.

Fire Regime Condition Class (FRCC)
By FRCC Interagency Working Group. A tool for determining the degree of departure from reference condition vegetation, fuels and disturbance regimes. Assessing FRCC can help guide management objectives and set priorities for treatments.

Forest Vegetation Simulator (FVS)
By US Department of Agriculture, Forest Service. A family of forest growth simulation models.

Fuel Characteristic Classification System (FCCS)
By US Department of Agriculture, Forest Service. Characterizes and classifies fuelbeds to capture the structural complexity and geographical diversity of fuel components across landscapes and provide the ability to assess elements of human (e.g. logging slash) and natural (e.g. insect and disease) change. Also available as PDF file.

By The Natural Capital Project. InVEST is a family of tools to map and value the goods and services from nature which are essential for sustaining and fulfilling human life. It enables decision-makers to assess the tradeoffs associated with alternative choices and to identify areas where investment in natural capital can enhance human development and conservation in terrestrial, freshwater, and marine ecosystems.

Registry of Ecological Models (REM)
By University of Kassel and GSF. A meta-database of ecological models providing model information, references, and contact information. Search by name, subject or free-text search.

SWPROD (for Data General AViiON)
By US Geological Survey (USGS). Determines primary productivity and community metabolism in streams and lakes using diel oxygen measurements. UNIX source code is available.

By ESSA Technologies. The Tool for Exploratory Landscape Scenario Analyses (TELSA) is a spatially explicit, GIS-based landscape-level model for simulating terrestrial ecosystem dynamics. It helps resource managers and planners assess the consequences of alternative management scenarios at the scale of landscape units. TELSA is freely available for research and educational purposes. Registration required.

By ESSA Technologies. The Vegetation Dynamics Development Tool (VDDT) provides a modeling framework for examining the role of various disturbance agents and management actions in vegetation change. It allows users to create and test descriptions of vegetation dynamics, simulating them at the landscape level. Registration required.

WWW-Server for Ecological Modelling
By ISEM and University of Kassel. A register and documentation system of ecological models: REM and ECOBAS, simulation-software and links, data sources and other information about modelling.

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This page last updated on 9/29/16