Welcome to our interactive
Hubbard Brook landscape Biomass program!

This program calculates forest biomass and nutrient estimates by species and plant part at Hubbard Brook, online and on the fly!! The calculations are for the Bird Area, for which we have forest data starting in 1981. Biomass and nutrients can be estimated over the entire watershed or selected plots.

Please do not use any of these numbers in any official way without first checking with the Hubbard Brook research team.

If you are losing the page when reloading images in the calculators, please go back to the W6 front page and reenter by clicking "click here if your browser does not support frames".

This program is optimized for Internet Explorer 6.

Bird Area

Please choose a year:
Please choose a health code (vigor):

You may select a diameter range over which you would like to make the summaries. The smallest diameter included in the data is 10 cm and there are no trees over 120 cm dbh. If no diameter range is specified, the program will run for all trees >10 cm dbh. (Note that all trees 10.0 to 10.4 will be doubled. See explanation. We recommend using either integers or a midpoint range (i.e. X.5 to X.4), unless you have read all the notes and understand exactly what the program returns.)
Enter lower diameter (in cm): 
Enter upper diameter (in cm): 
 

Please indicate by number which of the following plot summary options you are going to use:

1. Please choose one of the 4 transects or the whole study area : 

2. OR, choose individual plots (hold down the shift key to select large blocks of plots or hold down the Ctrl key to select several individual plots):

3. OR, enter a single plot. Plots in the Bird Area are numbered 1 to 397:

4. OR, enter the numbers of the first and last plots in a sequence (please left justify and leave one space between the numbers, e.g. 23 48):
Note: Transect line 5 includes plots 1 to 88; line 9 includes plots 89 to 192; line 13 includes plots 193 to 308; and line 17 includes plots 309 to 397.

Would you like to see a summary of chemistry? 
Please choose an element:  

Would you also like to see plot by plot chemistry data for the species selected below? (default is all species combined)
 

Would you like to see a watershed map and plot by plot biomass data? (this may take some extra time)

Please choose the species you would like to map:
Please choose the plant part you would like to map: 

Only those trees within the size and vigor classes and plots selected above will be considered in the calculations. 

 

 


Click here for the general overview and details of how all these calculations are being made.

Click here for Tom's very specific miscellaneous notes regarding this calculator. (not yet available)

Click here to access the data used in these calculations.

        Please note that this page may undergo changes in the future as we develop new ideas for calculating phytosociology. In the meantime, we welcome any suggestions that you may have for this page at thomas.siccama@yale.edu.

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Web page created July 2004
by Thomas Siccama and Ellen Denny