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Forest Health Information Management

Ground Survey Data Standards for Tracking Bark Beetle Management Activities

April 2003

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Following an aerial survey (or returning to a known infestation site, possibly pheromone baited the previous year), ground surveys are conducted to estimate the numbers of trees to be treated, mark trees for treatment, or define the outer boundary of an infestation in preparation for removal by harvesting.  

Several types of ground surveys are conducted depending on the expected method of treatment to be used.  These range in intensity from a walkthrough (least intense), grid probes, to fall and burn layout (most intense).  A brief description of surveys is presented in the Bark Beetle Management Guidebook.  Example district specific survey standards are found on the FPB FIA web site

Because of the variety of survey methods, the following are the recommended minimum attributes that should be included in any ground survey tracking system (additional attributes can be added by the TSA.):
 

Node_num

Region

District

Year

Site_ID

Location Mapsheet_polygon Aerial_surveyID

GPS_Waypoint

Latitude

Longitude

SurveyDate

Surveyed_by

Responsibilty

SurveyType

FHF

area_surveyed

survey_line_length

Num_Currents

Perc_Current

Num_2yr_cycle Perc_2yr_cycle

Num_Reds

Perc_red

vol_to_treat

Other Action  Comments        

Attribute Description (where standard codes are available, a look-up table is a useful feature to link to the field)

Node_num = a unique identity number generated by the GIS or database; ties the record to spatial data
Region/District  = standard three letter codes
Year = year of survey
Site_ID
= generated by the district using whatever numbering system is in place
Location = local geographic name
Mapsheet_polygon = from forest cover map
Aerial_surveyID = link to corresponding to Site_num in aerial survey record, if available
GPS Waypoint; Latitude, Longitude = from GPS
Survey Date / Surveyed by = from survey data
Responsibility = MOF, SBFEP, Licensee (name), private, other
Survey_type =  grid probe, walkthrough, etc.
FHF = predominant FH factor (pest) encountered
Area_surveyed = area represented by the sample (i.e., grid probed a stand of 25 ha)
Survey_line_length = for specific types of ground surveys, performance tracked by metres of line surveyed
Num_currents / Perc_Current = Number of trees / percentage of stand currently (green) attacked 
Num_2yr_cycle / Perc_2yr_cycle = Number of trees / percentage of stand infested with beetles in 2 yr life cycles
Num_Reds / Perc_red = Number of trees / percentage of stand that are red attacked (no live brood)
Vol_to_treat = Estimated or measured volume of trees with live brood requiring treatment.  Calculated from the sum of number of trees with brood (current + 2 yr cycle) x avg. vol/tree, or directly measured.

Other
= other pest damage
Action = proposed treatment (i.e., fall and burn, MSMA, conventional harvest, small-scale salvage, heli-log, defer and bait, abandon)
Comments = other information


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Last updated on October 19, 2005
The contact for this web page is: tim.ebata@gov.bc.ca

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BC Ministry of Forests and Range Forest Practices Branch