Table 1 Colony density estimates for bumble bee (Bombus spp.) subpopulations throughout the greater Saint Louis region in 2018. Ni is the total number of sampled females, Ng is the number of successfully genotyped females, Nnr is the number of colonies detected from genotyping, Nns is the number of colonies standardized for genotyping success, and Nc is colony density. Colony numbers were not calculated for populations with 15 or fewer successfully genotyped females. CC Calvary Cemetery, CW Castlewood State Park, ED EarthDance Farms, SNR Shaw Nature Reserve.

From: Bumble bees exhibit body size clines across an urban gradient despite low genetic differentiation

Species and colony estimates

Sites

CC

CW

ED

SNR

B. auricomus

Ni

56

39

44

Ng

54

38

38

Nnr

54

36

36

Nns

56.0

36.9

41.7

Nc

84.0

55.4

62.5

B. bimaculatus

Ni

1

72

49

38

Ng

1

70

49

34

Nnr

64

46

33

Nns

65.8

46.0

36.9

Nc

98.7

69.0

55.3

B. griseocollis

Ni

45

12

61

34

Ng

45

12

56

32

Nnr

45

54

32

Nns

45.0

58.8

34.0

Nc

67.5

88.2

51.0

B. impatiens

Ni

53

42

71

41

Ng

48

42

64

39

Nnr

45

41

58

35

Nns

49.7

41.0

64.3

36.8

Nc

74.5

61.5

96.5

55.2

B. pensylvanicus

Ni

39

5

19

53

Ng

38

5

16

52

Nnr

28

11

44

Nns

28.7

13.1

44.8

Nc

43.1

19.6

67.3