Life Histories of some Benthic Invertebrates from Streams of the Northern Jarrah Forest, Western Australia

摘要: Life history patterns of thirteen species invertebrates from streams the northern jarrah forest were examined over a 1-year period. Five had univoltine cycles with single cohort and demonstrated high degree synchrony larval development restricted period adult emergence. Two Leptophlebiidae also but showed more typical pattern Australian mayflies, extended recruitment, multiple overlapping cohorts long Uroctena sp., small gammarid, generation time 1 year considerable spatial variation in development. This appeared to be result differences constancy stream discharge was not attributable temperature regime streams. At least three splitting which resulted an apparently bivoltine cycle. A life-history alternating short times is described which, on average, would produce two generations every 3 years. considered highly adaptive strategy for insects slow life can explain periods recruitment emergence so often observed. Streams are depauperate compared other streams, despite predictable regimes. The insular nature south-west Bassian region its isolation may principle cause this reduced diversity. invertebrate community these simple structure has seasonality that atypical temperate Australia New Zealand.