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Blountstown, FL
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County:  Calhoun State: FL
Active Since: 2009 Observer: Pippen
Lat/Long: 30.4, -85.1 Landsat WRS Path/Row: 19/39
MODIS TIle V/H: 5/10 MODIS Line, Samp: 1145.58, 800.90

Site/Hive Description:

Hive on scale in a backyard shed, front of the hive is oriented so the bees can work out the door of the partially shaded SE door. Area is diverse in nectar and pollen producing plants along a creek and swampy area. Site is approx. 3/4 mile from the Apalachicola River.
Early in record keeping the hive consisted of 7 brood frames and 2 honey frames. One shallow super was added the first day of the study. The colony was started in Feb 09 as a nuc with a new Queen.

Scale is a Fairbanks platform 17x22 in, 500 lb capacity, increments are 0.5 lb, scale is leveled on firm wooden floor.

Red Maple, Ti Ti, Willow (Feb); Ti Ti, various berry, Pear, Peach, Persimmon, Willow, Poplar, Red Clover, Swamp Galberry (Mar); Ti Ti, Poplar, R. Clover, Swamp Galberry, Tupelo, Black Gum ( Apr); Tupelo, Low Bush Galberry, Chinese Talon (May); Chinese Talon, Palmetto, Red Cabbage Palm (Jun)

Nectar Flow Data 2009

Download Data File (comma delimited), download QA flag key



MODIS Subset Data (from the ORNL DAAC)
Red dots are the average of all pixels with acceptable quality (see landcover extract below for area covered).
Blue dots are the center pixel only (point is not plotted if the pixel is of unacceptable quality).



The Normalized Difference Vegetation Index (NDVI) is the ratio of the  difference between visible (red) and infra-red (IR) wavebands to the sum of these bands. 

NDVI = nir - red / nir + red

 NDVI provides an indication of the amount and vigor of vegetated  surfaces. 

 NDVI has been widely used with multiple generations of satellite data.


 The Enhnaced Vegetation Index (EVI) is a more complicated combination of wavebands compared to the more widely used index, NDVI.  The advantage of this newer index is improved sensitivity in high biomass regions and reduction in atmospheric influences.
pNIR = NIR reflectance
pRed = red reflectance
pBlue = blue reflectance
C1 = atmosphere resistance red correction coefficient
C2 = atmosphere resistance blue correction coefficient
L = canopy background brightness
G = gain factor

The MODIS sensor on the Terra satellite platform provides us with 16-day composite measures of NDVI/EVI throughout the year.  NASA distributes MODIS data from many of their distributed data centers.

MODIS Land Cover

MODIS Data Subset Citation:
Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC). 2007. MODIS subsetted land products, Collection 4. Available on-line [] from ORNL DAAC, Oak Ridge, Tennessee, U.S.A..

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Last Updated: February 1, 2024