Abstract:
:Two methods of extraction were used in the estimation of snail population densities in woodland litter. The time-consuming-Vágvölgyi technique proved to be 6.25 times more efficient than infra-red heat extraction but it was shown that the results obtained by the latter method could be easily corrected to conform with those of the former.Snail density varied with season (Winter, 1,000-1,250 m-2, Summer, 50-600 m-2), the annual mean density being 645 m-2. The annual mean ash-free dry weight biomass was 176 mg m-2 while annual population metabolism equalled 0.8941 O2 (=17.84 kJ m-2 yr-1).Two independent estimates of the energy equivalent of food consumption gave rise to values of 25.37 and 57.98 kJ m-2 yr-1, these respectively account for 0.54 and 1.23% of the known ground litter disappearance of 4,716.58 kJ (=235 g dry wt. m-2 yr-1).
journal_name
Oecologiajournal_title
Oecologiaauthors
Phillipson J,Abel Rdoi
10.1007/BF00377177subject
Has Abstractpub_date
1983-03-01 00:00:00pages
333-338issue
3eissn
0029-8549issn
1432-1939pii
10.1007/BF00377177journal_volume
57pub_type
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