Ecological parameter: reproductive life cycles per year

Parameter group: life & body related parameters

Explanation:
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

Abbreviations:

Category name:	Abbreviations:	Explanation:
semivoltine	sev	one generation in two years
univoltine	unv	one generation per year
bivoltine	biv	two generations per year
trivoltine	trv	three generations per year
multivoltine	muv	more than three generations per year
flexible	flx	flexible number of life cycles per year

Assigned taxa for each higher systematic unit:

Taxagroup	Number of assigned taxa / total number of taxa - percentage
Chironomidae	184 / 1315 - 13.9%
Ephemeroptera	168 / 353 - 47.5%
Odonata	163 / 174 - 93.6%
Plecoptera	125 / 576 - 21.7%
Trichoptera	130 / 1439 - 9%