Ecological parameter: reproductive life cycles per year

Parameter group: life & body related parameters

The parameter indicates the number of broods or generations of an organism in a year. As life cycles are generally closely connected with thermal conditions, latitudinal and altitudinal gradients from univoltine to polyvoltine cycles can be expected, though few studies prove this phenomenon. Taxa are classified according to different floristic regions: arctic, boreal, temperate, submeridional, meridional zone.

Classification system: single category assignment system
A description of the coding system can be found here  Abbreviations/Coding Systems

Category name:Abbreviations:Explanation:
semivoltinesevone generation in two years
univoltineunvone generation per year
bivoltinebivtwo generations per year
trivoltinetrvthree generations per year
multivoltinemuvmore than three generations per year
flexibleflxflexible number of life cycles per year
Assigned taxa for each higher systematic unit:
TaxagroupNumber of assigned taxa / total number of taxa - percentage
Chironomidae184 / 1315 - 13.9%
Ephemeroptera168 / 353 - 47.5%
Odonata163 / 174 - 93.6%
Plecoptera125 / 576 - 21.7%
Trichoptera130 / 1439 - 9%