Zoogeography and diversity patterns of the family Cicadellidae (Hemiptera) in Toshka Region, Egypt.

Leafhoppers (family: Cicadellidae) are among the most common plant sap-sucking pests, causing damage to wild and agronomic plants worldwide. The current paper aims to assess the zoogeography, diversity and population dynamics of the leafhopper species in an agricultural land converted ecosystem. Twenty species (two identified only to the genus level) belonging to 17 genera, 10 tribes, and three subfamilies were collected from Toshka Region, Aswan Governorate, Egypt, in 2020. The most common cicadellid species was Orosius albicinctus, representing 46.7% of the total catch. Low values of species richness and diversity were measured for leafhopper species as compared with those reported in our recent study carried out in Alexandria and Qena governorates. In sum, conversion of any natural ecosystem to agricultural land uses may cause declines in insect diversity. However, desert conversion may increase the diversity pattern of some insect pests. Analysis of the zoogeographic affinities of the leafhopper species from Toshka Region indicated a closer affiliation to the Palaearctic Region (35%) than any other region. Most leafhopper populations exhibited a unimodal seasonal pattern and were abundant in hot and dry months (May–September). The abundance of some leafhopper species correlated positively with temperature (seven species) and negatively with relative humidity (nine species). Six of these species correlated with both variables. This study is the first to investigate leafhopper communities in a converted ecosystem of Toshka Depression, Western Desert. [ABSTRACT FROM AUTHOR]