I seized all in all, 943 bumble bees owned by eight varieties
Collection day testing prejudice try examined by evaluating measured variety richness out of web sites having rarefacted types richness. In the rarefaction analysis, i lay test proportions within dos1 anybody, you to definitely lower than the minimum amount bought at this site with the fewest bumble bees. Rating buy regarding kinds richness for the sites stayed the same apart from Solon Prairie, and therefore diminished a couple towns inside the relative score, showing nothing aftereffect of testing efforts on the kinds fullness.
Abilities
Species richness ranged from five to eight species per site, and log2 Shannon-Wiener diversity across the eight sites ranged from 2.05 to 2.69. Five species common to all sites were B. bimaculatus Cresson, B. impatiens Cresson, B. pensylvanicus (DeGeer), B. auricomus (Robertson), and B. griseocollis (DeGeer), but the abundance of individuals among bumble bee species differed greatly between sites ( Fig. 1). We observed bumble bees on 43 of the 150 flowering species found at the sites. The percentage of native plant species among the 43 species visited was similar to their overall percentage in the combined flora of the sites (80 versus 77%, respectively). All of the plants on which bees were caught were herbaceous perennials or shrubs, except for one annual species (Melilotus alba L.).
The brand new proportional shipping of wealth of any bumble bee types in the all of seven tall lawn prairie internet during the eastcentral Iowa. Find Dining table 1 to have site name abbreviations.
The fresh new LRI of your over landscape with and you can without the site included in addition to exhibited high consequences into the bumble-bee range ( Dining table cuatro) but were not significant improvements along side design that have grasslands LRI and wealth
An average of, the latest land surrounding the sites try ruled because of the corn and you can soybean line plants (41%), having an additional 29% composed of joint grasslands (fallow and you can grazed pastures, alfalfa, an such like.) and you may 17% shared woodland. Read more “I seized all in all, 943 bumble bees owned by eight varieties”