Results (
Thai) 1:
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The results presented here clearly demonstrate a steady change in animal communitiesin the various habitats of the Bay of Rest. The seaward mudflat had thegreatest species richness, both in terms of the total species number (112) and themean number of species per station (20.5), the greatest mean animal density (992/m2) and the second highest biomass (4,056 mg/m2). The total number of speciesis partly increased by the greater number of stations made on the mudflat, butthe latter three categories are based on units of equal size. A combination of thelarge size and the high biomass per unit area (Table 3) shows that 61.1 % of thetotal biomass of marine invertebrates in the Bay of Rest was on the seawardmudflat. In contrast the landward backflat was poorest in all the biological characteristicsmeasured and contributed only 1.6% of the standing crop. The twomangrove zones R. stylosa and A. marina were intermediate between the mudflatto the seaward and the landward backflat, except for mean biomass which wasslightly higher in A. marina than on the mudflat due to the high biomasses of thegastropod T. sulcata. Differences between R. stylosa and A. marina stations were not as great as differences between either mangrove and either the mudflat orback flat. The total standing crop in the tree areas was 37.1% of the total (Table3).
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