ISSN:
1573-5117
Keywords:
Daphnia lumholtzi
;
production
;
carbon budget
;
seasonality
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract D. lumholtzi in Lake Samsonvale, Queensland, Australia, is a small species (max. size approx. 7 µgC) that occurs in low abundance (max. abundance 6400 m−3), with an average daily biomass of 3.32 mgC m−3. Its annual rates of carbon assimilation, production and respiration, are 166, 110, and 56 mgC m−3 y−1 respectively. Annual biomass turnover (annual production/average daily biomass) is 33 and production efficiency is 50–66%. The population may consume 1.65–2.20 mgC m−3 daily, equivalent to about 1% of the average daily standing crop of phytoplankton. Clutch size is small, 2 eggs, but represents 30–80% of a female's weight. A female may only produce 8–10 offspring in a full lifespan, nevertheless egg production may account for 56% of total production. The population shows autumn and spring peaks in abundance, and is believed to oversummer (4 months) as ephippia.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00018203
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