RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Invader effects in a community of cavity nesting megachilid bees (Hymenoptera : Megachilidae)

Auteur(s) / Author(s)

BARTHELL J. F. (1) ; FRANKIE G. W. (1) ; THORP B. W. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Environmental Science, Policy and Management, University of California, Berkeley, CA 94720, ETATS-UNIS
(2) Department of Entomology, University of California, Davis, CA 95616, ETATS-UNIS

Résumé / Abstract

Temporal and spatial characteristics of a community of cavity nesting megachilid bee species and their introduced competitors were examined at a site in the Central Valley of California. Two of the introduced bee species Megachile apicalis Spinola and Megachile rotundata (F.), were frequent nest site occupants and accounted for 19.6 and 3.4% of all artificial nesting cavities (trap-nests) monitored during the lst and 2nd yr of this study, respectively. These species were most active before and after the peak in native bee nesting activity and tended to occupy xeric habitats, despite significantly higher larval mortality associated with such environments. The ability to occupy a wide array of habitats may account for the invasion success of M. apicalis in California. Another invader, the European earwig, Forficula auricularia L., was a frequent occupant of nesting cavities in mesic habitats, accounting for 59 and 85% occupancy of trap-nests during the 1st and 2nd yr of the study, respectively. Exclusion experiments indicate earwig densities were sufficient to displace female bees at nest sites with 1/3 as much nesting activity occurrig in sampling units that allowed entry by earwigs as those made inaccessible to them with sticky barriers. In comparison all native species (including bees and wasps) never accounted for >25% of all occupied nesting cavities of either monitoring period of the study.

Revue / Journal Title

Environmental entomology    ISSN  0046-225X   CODEN EVETBX 

Source / Source

1998, vol. 27, no2, pp. 240-247 (34 ref.)

Langue / Language

Anglais

Editeur / Publisher

Entomological Society of America, Lanham, MD, ETATS-UNIS  (1972) (Revue)

Mots-clés anglais / English Keywords

Animal community

;

Invasion

;

Introduced species

;

Interspecific competition

;

Habitat

;

California

;

Megachile

;

Forficula auricularia

;

Community structure

;

United States

;

North America

;

America

;

Social insect

;

Megachilidae

;

Apoidea

;

Aculeata

;

Hymenoptera

;

Insecta

;

Arthropoda

;

Invertebrata

;

Forficulidae

;

Dermaptera

;

Mots-clés français / French Keywords

Communauté animale

;

Invasion

;

Espèce introduite

;

Compétition interspécifique

;

Habitat

;

Californie

;

Megachile

;

Forficula auricularia

;

Structure communauté

;

Etats Unis

;

Amérique du Nord

;

Amérique

;

Insecte social

;

Megachilidae

;

Apoidea

;

Aculeata

;

Hymenoptera

;

Insecta

;

Arthropoda

;

Invertebrata

;

Forficulidae

;

Dermaptera

;

Mots-clés espagnols / Spanish Keywords

Comunidad animal

;

Invasión

;

Especie introducida

;

Competencia interespecífica

;

Habitat

;

California

;

Megachile

;

Forficula auricularia

;

Estados Unidos

;

America del norte

;

America

;

Insecto social

;

Megachilidae

;

Apoidea

;

Aculeata

;

Hymenoptera

;

Insecta

;

Arthropoda

;

Invertebrata

;

Forficulidae

;

Dermaptera

;

Localisation / Location

INIST-CNRS, Cote INIST : 15465, 35400007584023.0090

Nº notice refdoc (ud4) : 2257317



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas