 |
Bumble Bee hive ready to install |
One of our projects for this coming field season is to measure how far various bumble bee species travel through the mountains to pollinate flowers. We are trying to understand how sensitive these bees are to forest fragmentation that will likely occur as changes in the climate drive the treelines higher and encroach on mountain meadows. The nanotech revolution hasn't supplied us with GoPro Cameras or GPS devices small enough to attach to bees, so our plan is to examine the pollen that they bring back from their foraging missions. If a bee returns to a nest at the base of a mountain with pollen from plants that are only found at the top of the mountain, then we can deduce that they flew there themselves and didn't hitch a ride with a ranger (but you never know, they've been talking more about assisted migration...).
Jim and I built a dozen bumble bee nests out of 8" flower pots, wire mesh, mosquito netting, and sections of hose. Below are pictures of the pieces and at the bottom of this post is a list of useful resources on bumble bee nest construction.
1/4 in hardware clothe with sides folded.
 |
Screen to keep the nest material off the wet ground |
We used dried moss, cattail fluff, sedge flowers, bracken fern, and mouse bedding for our next material
 |
Nest material and hose with nail to keep out rodents |
Super glue worked well to attach the mosquito netting to the pot
 |
Ventilation holes with bug netting to keep pests out |
 |
Buried several inches with gravel liner for drainage |
 |
Installation complete (Ferndale) |
We placed 9 nests around Bellingham and Ferndale last week, and once we get the necessary permits from the US Forest Service, we will place the last three near the Silver Fir Campground in the Mt. Baker National Forest. The day after we installed the nests in Ferndale, we observed a Bombus melanpygus queen searching for a home in the vicinity. With luck, the bees will find our nests.
Sources for more information on building bumble bee nests:
Johansen, C. 1967 Ecology of three
species of bumble bees in southwestern Washington. Wash. Agr. Exp. Sta.
Bull. 57:1-12
Hobbs, G. A. et al 1967 Ecology of
species of Bombus (Hymenoptera: Apidae) in southern Alberta: Subgenus
Pyrobombus. Canad. Entomol. 99:1271-1292
Sladen, F. W. L. (1912, 1989). The
humble-bee. Macmillian and Co. Ltd.
Intenthron, Manfred and Gerrard, John.
(1999). Making nests for bumble bees. International Bee Research Association. (available
from http://www.ibra.org.uk)