Laboratory work

A Identify the macrofauna in each collection, recording numbers and rough weight for each species. Pass part of each sediment sample through 0.5 mm sieves to collect meiofauna. Use menthol or dilute alcohol to detach interstitial species from sand grains, and decant. Plot zonation diagrams for each species, with details for macrofauna of numbers and rough biomass per unit area. B Investigate the vital statistics of populations of dominant macrofauna from size/frequency data or from annual rings on shells. Does the age structure of populations vary with shore level? Determine growth rates for size and weight from measurements of age groups. Distinguish rough weights, flesh weights, dry weights and ash-free dry weights. Does the drying technique affect the final figure of dry weight? By combining data on population density, vital statistics and growth rates, attempt to estimate annual production. Construct an energy flow diagram for the shore (Townsend and Phillipson, 1977). Calculate a diversity index for the population. C Measure salinities of interstitial water samples. Make particle grade analyses of sediment samples from each station by sedimentation or sieving. Determine organic contents of sediment samples by incineration and/or titration. To what extent are silt content and organic content related, and how do the inorganic parameters correlate with the distribution of each species?

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