Temperature has a minor influence on some important factors governing the invasion dynamics. (A) Fraction of P-element insertions with any internal deletion (ID; all) and an ID that may repress P-element activity (KP-like repressor). Only samples at the plateau of the invasions were used (hot $≥$20, cold $≥$70 generations). (B) Total size of piRNA clusters during the invasions based on unambiguously mapped piRNAs. (C) Average number of P-element insertions in piRNA clusters per haploid genome. Only samples at the plateau of the invasion are shown. (D) Enrichment of P-element insertions in piRNA clusters, ORCs and insertion sites shared among species. Only samples with more than 10 P-element insertions per haploid genome were used (generations $≥$20 hot and $≥$50 cold).