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Table 3 The five most important variables given by the Random Forests (RF) models for each month

From: Modelling the monthly abundance of Culicoides biting midges in nine European countries using Random Forests machine learning

Month

Ensemble or species

Variable 1

Variable 2

Variable 3

Variable 4

Variable 5

January

Obsoletus

NDVI A2 (100)

BIO 13 (99.29)

dLST A0 (94.14)

MIRP3 (91.60)

dLST A1 (83.34)

Pulicaris

dLST DA (100)

BIO 18 (98.32)

dLST A0 (97.28)

BIO 14 (95.91)

MIR A1 (94.91)

C. imicola

NDVI A0 (100)

dLST A1 (95.94)

year.2012 (92.02)

dLST DA (88.44)

EVI A1 (84.53)

February

Obsoletus

dLST A1 (100)

BIO 2 (89.01)

Altitude (79.35)

BIO 3 (78.19)

BIO 7 (76.32)

Pulicaris

rec_snow (100)

NDVI A3 (91.51)

BIO 1 (88.21)

BIO 18 (85.53)

BIO 3 (84.6)

C. imicola

MIRDA (100)

BIO 18 (96.60)

EVI P1 (94.60)

MIR D3 (92.40)

nLST P3 (92.06)

March

Obsoletus

BIO 8 (100)

dLST A1 (89.42)

BIO 1 (60.88)

nLST A0 (58.24)

Altitude (47.88)

Pulicaris

dLST A1 (100)

BIO 1 (97.29)

MIRD1 (97.24)

Altitude (96.54)

dLST P1 (95.80)

C. imicola

BIO 1 (100)

MIRP2 (91.79)

BIO 18 (91.49)

BIO 14 (86.05)

BIO 15 (84.94)

April

Obsoletus

EVI A1 (100)

BIO 18 (57.19)

BIO 14 (98.44)

dLST P2 (95.81)

EVI P1 (94.00)

Pulicaris

dLST A0 (100)

BIO 18 (77.71)

BIO 1 (73.82)

dLST P2 (67.63)

BIO 14 (66.36)

C. imicola

dLST P2 (100)

BIO 1 (99.74)

BIO 15 (93.88)

MIR P1 (93.46)

MIR D1 (93.21)

May

Obsoletus

BIO 3 (100)

BIO 18 (66.19)

BIO 8 (48.85)

BIO 2 (44.25)

nLST P1 (33.82)

Pulicaris

year.2010 (100)

nLST P3 (53.54)

BIO 15 (32.67)

dLST P3 (31.48)

BIO 1 (30.68)

C. imicola

nLST A0 (100)

BIO 14 (91.81)

BIO 1 (89.24)

BIO 7 (83.80)

year.2008 (79.33)

June

Obsoletus

BIO 18 (100)

dLST P1 (62.27)

nLST P1 (57.27)

MIR A0 (55.11)

BIO 2 (48.97)

Pulicaris

BIO 1 (100)

Goat (55.07)

year.2008 (48.19)

BIO 8 (46.77)

nLST P3 (42.38)

C. imicola

year.2008 (79.33)

year.2008 (74.75)

dLST P2 (74.30)

BIO 7 (65.81)

BIO 18 (48.15)

July

Obsoletus

BIO 18 (100)

BIO 2 (69.01)

BIO 14 (68.50)

Altitude (63.25)

nLST A2 (59.09)

Pulicaris

BIO 1 (100)

BIO 18 (85.69)

EVI P3 (82.03)

dLST P3 (80.52)

dLST A0 (75.92)

C. imicola

BIO 14 (100)

year.2008 (74.75)

dLST P2 (74.30)

BIO 7 (65.81)

BIO 18 (48.15)

August

Obsoletus

nLST A2 (100)

nLST A2 (90.07)

BIO 1 (87.11)

nLST A0 (83.53)

year.2008 (66.38)

Pulicaris

year.2011 (100)

year.2012 (49.76)

nLST A2 (49.56)

nLST A0 (48.00)

nLST P2 (37.90)

C. imicola

BIO 1 (100)

BIO 18 (97.20)

MIRD1 (96.48)

dLST P2 (96.20)

EVI P1 (95.47)

September

Obsoletus

BIO 18 (100)

year.2012 (62.45)

nLST P1 (45.62)

nLST A2 (44.68)

MIR P2 (43.26)

Pulicaris

nLST A2 (100)

BIO 1 (86.34)

dLST P2 (80.35)

dLST A0 (76.10)

BIO 8 (71.45)

C. imicola

BIO 1 (100)

nLST A0 (90.67)

BIO 14 (83.13)

dLST P2 (78.91)

BIO 18 (70.83)

October

Obsoletus

BIO 3 (100)

BIO 18 (38.70)

year.2012 (32.36)

nLST A2 (23.50)

BIO 2 (23.18)

Pulicaris

nLST A2 (100)

year.2012 (64.97)

BIO 1 (41.18)

BIO 3 (40.17)

nLST P2 (38.33)

C. imicola

BIO 14 (100)

BIO 1 (95.56)

nLST A0 (91.46)

BIO 13 (81.09)

BIO 15 (73.79)

November

Obsoletus

nLST A2 (100)

BIO 3 (93.01)

EVI A0 (62.95)

year.2011 (58.13)

nLST P3 (53.28)

Pulicaris

BIO 8 (100)

nLST A2 (93.51)

Altitude (87.21)

dLST P1 (82.30)

dLST P2 (77.51)

C. imicola

BIO 14 (100)

BIO 13 (96.53)

BIO 1 (91.16)

nLST A0 (72.20)

nLST P1 (67.13)

December

Obsoletus

Altitude (100)

NDVI A0 (97.44)

dLST A1 (97.30)

EVI A2 (92.83)

EVI D2 (92.24)

Pulicaris

nLST A2 (100)

nLST P3 (97.92)

dLST A0 (92.55)

Altitude (92.51)

dLST P2 (91.47)

C. imicola

Goat (100)

year.2008 (76.26)

year.2011 (75.42)

BIO 15 (63.56)

EVI DA (61.48)

  1. Notes: Numbers in parentheses indicate the importance of the variables. The top most important variables (“Variable 1” column) have a value of 100