Abstract
ABSTRACT During June 2003 to June 2004, annual production and Production/Biomass (P/B) ratios were estimated for the larval chironomid assemblage found on the submerged branches and leaves (snag) of Heizhuchong Stream, a second order river of Hanjiang River basin, China. Temperature-specific growth rate equations from field growth studies were applied to the biomass values from quantitative field samples to obtain mean daily production on a monthly basis throughout the year. The annual production of the filtering collector Rheotanytarsus spp. was 32.1g'm−2'y −1 for snag surface area, and productions for the gathering collectors Polypedilum spp. and Rheocricotopus spp. were 10.9 g'm−2'y−1 and g'm−2'y−1, respectively. These production estimates are among the highest ones ever reported for chironomids in freshwater ecosystems, mainly owing to extremely high P/B ratios. Annual PB ratios were 177 for Rheocricotopus spp., 261 for Polypedilum spp. and 194 for Rheotanytarsus spp.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
