Effects of Fragmentation on a Distinctive Coastal Sage Scrub Bee Fauna Revealed Through

Effects of fragmentation on a distinctive coastal sage scrub bee fauna revealed through incidental captures by pitfall traps

Journal of Insect Conservation

Keng-Lou James Hung*, John S. Ascher, Jason Gibbs, Rebecca E. Irwin and Douglas T. Bolger

*Corresponding author. Department of Biological Sciences, Dartmouth College, Hanover, NH 03755. Current address: Division of Biological Sciences, Section of Ecology, Behavior, and Evolution, University of California, San Diego, La Jolla, CA 92093-0116. <

Online Resource 1:Map of the study area produced using Google Earth (© Google 2015). Four reserve plots (dark circles) in the northwest are located in Mission Trails Regional Park (northernmost point at N32.8274, W117.0510). The four reserve plots in the southwest are located within the Otay-Sweetwater (northernmost point at N32.7318, W116.9549). The Otay-Sweetwater plots form a cluster in which spatial autocorrelation may be possible; however, analyses that are conducted with the exclusion of any three of the four data points in the cluster yield results qualitatively similar to analyses of the full dataset. Thus, we have chosen to report the results from the analyses of the full dataset.

Effects of fragmentation on a distinctive coastal sage scrub bee fauna revealed through incidental captures by pitfall traps

Journal of Insect Conservation

Keng-Lou James Hung*, John S. Ascher, Jason Gibbs, Rebecca E. Irwin and Douglas T. Bolger

Online Resource 2:Native bee species and morphospecies collected via pitfall traps in coastal sage scrub habitats of southwestern San Diego County, California, USA.Asterisks (*) denote species represented only by records from outside of San Diego County in queried institutional databases, and daggers (†)denote species represented by fewer than 50 individuals in institutional databases. Institutional databases were obtained from the American Museum of Natural History, the US Department of Agriculture Bee Biology and Systematics Laboratory, the Kansas Natural History Museum Snow Entomology Collection, and the University of California Riverside Entomology Research Museum, and include specimens collected using all available collecting methods (i.e., not limited to pitfall samples). The abbreviation “nr.” means “near” or “similar to,” suggesting a species related to the specific epithet given and “cf.” means “compare to,” suggesting uncertainty in the identification.

Family / Species / # collected
(reserve / fragment) / # institutional records (including non-SD records)
Andrenidae / Andrena cryptanthae Timberlake / 1 / 0 / 121
Andrena osmioides † Cockerell / 0 / 3 / 19
Andrena timberlakei *† Cockerell / 21 / 11 / 18
Andrena nr. subtilis / 1 / 0
Calliopsis rhodophila Cockerell / 41 / 129 / 64
Macrotera tristella (Timberlake) / 74 / 56 / 131
Perdita claypoleiCockerell / 3 / 4 / 821
Perdita interrupta Cresson / 3 / 1 / 267
Perdita sp. 1 / 0 / 1
Apidae / Anthophora urbana Cresson / 1 / 0 / 8110
Anthophorula nitens (Cockerell) / 4 / 0 / 129
Anthophorula torticornis *† (Cockerell) / 79 / 115 / 30
Bombus californicus Smith / 5 / 4 / 1258
Bombus vosnesenskii Radoszkowski / 2 / 1 / 2332
Ceratina acanthaProvancher / 2 / 2 / 1410
Ceratina arizonensisCockerell / 48 / 131 / 900
Ceratina nanulaCockerell / 0 / 2 / 7302
Diadasia australis (Cresson) / 7 / 12 / 954
Diadasia bituberculata (Cresson) / 2 / 1 / 445
Diadasia diminuta (Cresson) / 1 / 0 / 4332
Diadasia laticauda Cockerell / 6 / 3 / 384
Diadasia martialis Timberlake / 2 / 1 / 194
Diadasia ochracea (Cockerell) / 1 / 1 / 1457
Diadasia opuntiae † Cockerell / 0 / 1 / 29
Diadasia rinconis Cockerell / 5 / 13 / 1835
Eucera tricinctella *† (Timberlake) / 8 / 0 / 6
Eucera cf. virgata / 3 / 1
Melissodes communis Cresson / 11 / 13 / 866
Melissodes plumosa † LaBerge / 27 / 40 / 23
Melissodes tessellataLaBerge / 15 / 36 / 51
Family / Species / # collected
(reserve / fragment) / # institutional records (including non-SD records)
Apidae / Melissodes velutina † (Cockerell) / 1 / 0 / 37
Neopasites nr. mojavensis / 0 / 3
Tetralonielladavidsoni † (Cockerell) / 1 / 0 / 2
Tetraloniella pomonae (Cockerell) / 0 / 1 / 103
Colletidae / Colletes sp. 1 / 1 / 0
Halictidae / Agapostemon texanus Cresson / 37 / 39 / 2710
Augochlorella pomoniella (Cockerell) / 2 / 0 / 1073
Conanthalictus bakeri Crawford / 22 / 7 / 522
Dufourea rhamni *† (Michener) / 16 / 29 / 39
Halictus farinosus Smith / 8 / 2 / 3226
Halictus tripartitusCockerell / 113 / 165 / 25996
Lasioglossum brunneiventre * (Crawford) / 5 / 46 / 1718
Lasioglossum imbrex*† Gibbs / 1 / 8 / 5
Lasioglossum incompletum * (Crawford) / 270 / 194 / 3692
Lasioglossum macroprosopum *† Gibbs / 3 / 30 / 4
Lasioglossum microlepoides * (Ellis) / 40 / 45 / 11226
Lasioglossum nevadense * (Crawford) / 58 / 47 / 3012
Lasioglossum petrellum * (Cockerell) / 5 / 0 / 129
Lasioglossum punctatoventre * (Crawford) / 3 / 9 / 1127
Lasioglossum sisymbrii (Cockerell) / 1 / 0 / 5348
Lasioglossum cf. avalonense / 16 / 11
Lasioglossum cf. impavidum / 22 / 37
Lasioglossum cf. nigrescens / 2 / 3
Lasioglossum cf. robustum / 29 / 4
Lasioglossum nr. actinosum / 8 / 7
Lasioglossum nr. incompletum / 1 / 0
Lasioglossum sp. 1 / 0 / 1
Micralictoides ruficaudus * (Michener) / 1 / 0 / 70
Sphecodes sp. 1 / 8 / 17
Sphecodes sp. 2 / 0 / 1
Megachilidae / Anthidiumjocosum † Cresson / 102 / 85 / 134
Ashmeadiella sp. 1 / 3 / 4
Ashmeadiella sp. 2 / 1 / 0
Atoposmia pycnognatha * (Michener) / 0 / 1 / 94
Dianthidium dubium Schwarz / 1 / 0 / 713
Dianthidium pudicum (Cresson) / 6 / 6 / 1226
Hoplitis grinnelliCockerell / 0 / 2 / 714
Hoplitis semirubra * (Cockerell) / 0 / 4 / 307
Melittidae / Hesperapis fuchsi † (Viereck) / 0 / 10 / 37
Hesperapis rufipes * (Ashmead) / 1 / 0 / 220