I presented visual surveys for bumble bees at each of 7 internet from inside the exact same around three census attacks as we counted flowery money assortment (twenty eight Get so you can seven Summer, 22-31 June, 22-29 July). For every of your own three bumble bee studies, i went along to per site 3 times, immediately after through the each of three time symptoms (0800-1100, 1100-1300, 1300-1700 times). Most of the sampling was accomplished into the bright months having temperature between 19 and thirty-two°C.
We trapped and noted for each bumble-bee with a tiny mark off colored correction water into thorax to stop counting individuals more than once during a sample months on an online site. We recorded bumble bee variety, status, and also the plant variety on which this new bumble-bee was found foraging and you will create the newest bee. We spent 29 min for every visit during the a few internet sites which have a segmet of ?dos,000 meters 2 , 45 minute at a couple of ten,000-yards dos internet, ninety min on a couple of 29,000-yards dos internet sites, and 120 min at the several 70,000-meters 2 internet sites. We checked out to possess a sampling time prejudice having fun with rarefaction (come across Mathematical Studies)parisons regarding variety out of bees stuck hourly so you can resource values or environment types eliminated possible testing time biases.
I known bumble bees worldwide having fun with Mitchell (1962) since the a first expert; to possess definitions out of regional species, i utilized Medler and you may Carney (1963). Hendrix in the University of Iowa. New plant species was indeed later on classified while the native otherwise put so you’re able to get acquainted with whether the bumble bees, which can be indigenous, demonstrated choices for native flowering species. 続きを読む →