Journal article
The influence of temperature and salinity on energy partitioning in the marine nematode Diplolaimelloides bruciei
Oecologia, Vol.51(3), pp.318-325
1981
Abstract
Measurements of population growth, generation time, fecundity and respiration in laboratory culture have been made, in relation to temperature and salinity, for the nematode Diplolaimelloides bruciei Hopper, a species normally associated with decayed material of the marsh grass Spartina. The intrinsic rate of increase (r) is high: it is related to temperature between 5° and 25°C by a sigmoid function which is steepest between 10° and 15°C, and is maximum at 26‰ salinity. Generation time is related to temperature by a power function and is shortest at 26‰ salinity. The effect of temperature on generation time is consistent with other data for marine nematodes, and the steep slope of r against temperature is largely due to the marked effect of temperature on fecundity. A sex ratio of 2:1 in favour of males is maintained regardless of culture conditions or population density. Respiration increases exponentially with temperature between 5° and 25°C, with a very high Q10 (3.94), but is not affected by salinity. At 30°C respiration is no higher than at 25°C. A high and relatively stable production efficiency (P/A) is maintained between 10 and 30°C with a maximum of 87% at 15°C; there is a stable reproductive effort (Pr/A) of about 10%. At 5°C both these ratios are zero. Data for the harpacticoid copepod Tachidius discipes, derived from the literature, show that this too has a high and stable production efficiency, which may be a characteristic of meiofaunal species in general, but in this species efficiency is relatively high at 5°C. Many features of the energy balance in D. bruciei can be related to an opportunistic mode of life.
Details
- Title
- The influence of temperature and salinity on energy partitioning in the marine nematode Diplolaimelloides bruciei
- Authors/Creators
- R.M. Warwick (Author/Creator) - Natural Environment Research Council
- Publication Details
- Oecologia, Vol.51(3), pp.318-325
- Publisher
- Springer Verlag
- Identifiers
- 991005540533307891
- Copyright
- © 1981 Springer-Verlag.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.2 Marine Biology
- 3.2.605 Benthic Biodiversity
- Web Of Science research areas
- Ecology
- ESI research areas
- Environment/Ecology