Production dynamics of some arctic Chironomus larvae
Production and standing stock were determined for a two‐species population of Chironomus larvae in a tundra pond near Barrow, Alaska, from 1975 through 1977. These larvae take 7 years from recruitment to adult emergence, and a multicohort population was always found. Cohort‐specific values for stand...
| Published in: | Limnology and Oceanography |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1982
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| Online Access: | http://dx.doi.org/10.4319/lo.1982.27.4.0728 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1982.27.4.0728 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1982.27.4.0728 |
| Summary: | Production and standing stock were determined for a two‐species population of Chironomus larvae in a tundra pond near Barrow, Alaska, from 1975 through 1977. These larvae take 7 years from recruitment to adult emergence, and a multicohort population was always found. Cohort‐specific values for standing stock and annual production were calculated from size and abundance data for seven cohorts found in each sample. Total standing stock ranged from 6.7 to 12.3 g·m − 2 (dry wt), and total annual production values were 5.4, 3.6, and 3.4 g·m −2 in the 3 years. Low temporal variation in both standing stock and annual production results from the multicohort structure of the population. Life table methods were used to estimate a value of 4.5 g·m −2 for cohort production over a 7‐year life cycle. Cohort P:B was 3.6, which is typical for Chironomus. Annual P:B values averaged only 0.49 because annual standing stock is about seven times greater than average cohort biomass over the life cycle, while annual production is comparable to cohort production. |
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