The “deduction” approach: A non-invasive method for estimating secondary production of earthworm communities

摘要: Abstract Secondary production is an important parameter for the study of population dynamics and energy flow through animal communities. earthworm communities has been determined with size-frequency instantaneous growth rate methods, whereby populations are repeatedly sampled at regular intervals change in biomass cohorts or individuals between sampling dates determined. The major disadvantage repeated that it disturbs soil permanently removes earthworms from area. “ deduction ” approach a theoretical model partitions into defined pools makes assumptions about growth, recruitment mortality each pool. In 2004 2005, were added to undisturbed field enclosures was used estimate secondary indigenous during crop growing period (17–18 weeks) year. estimates made by similar direct temperate agroecosystems. “deduction indirect method production, appropriate manipulation experiments where removal organisms physical disturbance habitat could bias results.