Modeling Ontario’s Stand Succession and Yield (MOSSY) - 120-303

Description: The objectives of this project were to develop a first version of a user-friendly computer based model, incorporating new data-derived projection rules, which will procide forest managers with the ability to generate more realistic projections of stand and forest growth by accounting for natural succession (changes in species composition, site class, stocking, height, etc.) through time, and to incorporate the outputs from this new succession model into forest management planning models such as SFMM (Strategic Forest Management Model), Patchworks, and OWHAM (Ontario Wildlife habitat Assessment Model).

The MOSSY Project can be broken down into 5 component parts:

1. Front-end Component - This entails developing the software requirements and applications necessary to allow the MOSSY model to retrieve and load the forest inventory data (comprising primarily FRI, plus other user-defined attributes).

2. Yield Component - This involves developing the yield functions, both at the Standard Forest Unit level and at the species level. Much of the SFU level work has been done already through the Benchmark Yield Curve Project. The emphasis for the MOSSY project will be in developing species-level yield functions and tables.

3. Succession Component - The succession component is really the most crucial part of the MOSSY project. The succession work involves analyzing data sets (Growth and Yield plots including PSP's and historic PGP's, NEFEC and COFEC plots), with the goal of determining rates of change in basal area of species compostion. These rates of change values will then be used to predict future species composition and age, based on the current Forest Resource Inventory description of the stand. Factors which affect BA growth such as stand age, height, site index, working group, stocking, site region, and slope position, may be included in the model.

4. OWHAM Component - The Ontario Wildlife Habitat Assessment Model will require inputs from MOSSY with regard to changes in habitat types through time, as a funtion of succession. As such, the MOSSY application will have to be able to create outputs which will be compatible with OWHAM.

5. Software Component - MOSSY will be a user-friendly program, targeted for use by field-level staff. Outputs from the four components listed above will be built into the MOSSY applicatio. Integral to the program will be its ability to interface with Patchworks, SFMM, and OWHAM.

The Project Team: Fred Pinto, MNR, Al Stinson, MNR-FRP, Margaret Penner, Forest Analysis Inc., Daniel Kaminski, NaturaLogic, Tom Moore, Spatial Planning Systems, Dave Nesbitt, Brian Naylor and Murray Woods, MNR.



Technical Notes/ Reports:

MOSSY User manual and electronic help file: Pinto, F and S. Romaniuk. 2007. MOSSY. Southern Science and Information, North Bay ON. 74 p.


Tree Tips:

Tree Tip: FRP Project No. 120-303



MOSSY Overview

MOSSY Update


Status Reports:

Status Report (2007-2008)

Project Work Report (2007-2008)

Status Report (2008-2009)

Financial Summary (2008-2009)

Status Report (2009-2010)


For Additional Information Contact:

This e-mail address is being protected from spambots. You need JavaScript enabled to view it