31 Mar At each and every check out, i walked the complete web site and you can sought for bumble bees on flowering plant life
I held artwork studies to possess bumble bees at each of seven websites in same around three census periods while we counted floral capital variety (28 Get so you're able to 7 June, 22-31 Summer, 22-31 July). For every of three bumble bee surveys, we went along to for each and every webpages three times, immediately after during the every one of three-time episodes (0800-1100, 1100-1300, 1300-1700 days). Most of the sampling try accomplished towards bright months having temperatures anywhere between 19 and you can thirty two°C.
I stuck and marked for each bumble bee having a small dot regarding coloured correction fluid towards thorax to get rid of relying anyone more often than once throughout the a sampling several months at a site. We submitted bumble bee types, status, while the plant variety about what new bumble-bee is discovered foraging and you will put out the brand new bee. We invested 30 min each head to from the one or two internet which have an area of ?2,000 meters dos , forty five minute on a few 10,000-m 2 sites, 90 min in the several 29,000-m dos web sites, and you can 120 minute at the two 70,000-m dos websites. I looked at to have a sampling time prejudice having fun with rarefaction (come across Mathematical Analysis)parisons regarding wealth out of bees stuck each hour to help you money thinking otherwise environment items removed potential sampling big date biases.
We recognized bumble bees on the planet having fun with Mitchell (1962) since a primary expert; to own definitions of local variety, we used Medler and you may Carney (1963). Hendrix at College regarding Iowa. The newest plant kinds was indeed later on categorized because local otherwise put so you're able to familiarize yourself with if the bumble bees, which happen to be local, displayed preferences getting native flowering variety.
Analytical Analyses.
Dominikaaniset naishenkilöitäWe used the log2 Shannon-Wiener index to calculate bumble bee species diversity using cumulative abundances across all censuses.