A search for pattern in faunistical records of drosophilid species in Switzerland

Abstract

A total of 257966 specimens from 149 catches of drosophilid flies from Switzerland, belonging to the 34 most frequent species are considered here. The records are screened for effects of environmental factors (geographical region, altitude, season, habitat, soil, climate) on the size and diversity of the samples. Furthermore, the individual species are compared with respect to frequency and diversity, and to the effect of the above factors on their proportions in the samples. Fig. 1. Localities in Switzerland (for code numbers see Table 1) from which a total of 149 samples was collected. Regions are abbreviated as follows: J = Jura, M = Mittelland (dotted), P = Prealps, A = Alps (dotted), T = Ticino u. S.

Conservation of arthropod diversity in montane wetlands: effect of altitude, habitat quality and habitat fragmentation on butterflies and grasshoppers

“…The decline of general arthropod diversity and in species richness of grasshoppers with increasing altitude is consistent with most previous findings, indicating that the diversity of many taxa decreases with colder temperatures (Currie 1991; Thomas 1991; Kennedy 1994). Thus, Burla & Bächli (1991) found similar declines in species richness in drosophilid flies along altitudinal gradients in the Alps. However, the positive relationship of the species richness of butterflies with increasing altitude was unexpected.…”

Behavioral constancy for interspecies dependency enables Nearctic Chymomyza amoena (Loew) (Diptera: Drosophilidae) to spread in orchards and forests in Central and Southern Europe

“…However, two centuries of European forest entomology (Schwerdtfeger 1973) failed to disclose any record in Europe prior to 1975. Drosophilid collecting in Switzerland netted over 250,000 specimens from 1946 to 1984 representing the 34 most frequent species (Burla and Ba¨chli 1991a) and C. amoena was not present until 1988 when it was captured in three places in Canton Ticino. Two additional samplings in Canton Ticino also support the evidence that C. amoena is a recent invader: in 1970, 32,812 drosophilids were netted in forests some 10 km south of Maggia and in 1981, 22,385 flies were netted in 10 places between Bellinzona and All'Acqua also in Canton Ticino; C. amoena was in neither sample .…”

Altitudinal distribution and seasonal life cycle of drosophilid flies (Diptera: Drosophilidae) in central Japan, with reference to their biogeographic features

“…1982; Minami & Watabe 1990, 1991). The former is also mainly distributed at high altitudes in central Europe (Burla & Bächli 1991), although it occurs at low altitudes in northern Europe and eastern Siberia (Lumme et al . 1978; Tanabe et al .…”