. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Others Sponges 3 4 Gastropods 43% Echinoderms Kchinoderms 4%. Figure 2. Composition and biomass of the benthos While the high macrophytobenthic biomass in the centre of the lagoon, is a result of the high abundance of a cushion-shaped Cyanophyceae spp. at station 90. Animal biomass is significantly correlated with depth, and plant biomass with mud percentage (Table 2). Table 2. Relations between biological parameters and environmental parameters (ATP in ng/cm2 ; Chlorophyll a and Phaeopigments in mg/cm2 ; Dens
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Others Sponges 3 4 Gastropods 43% Echinoderms Kchinoderms 4%. Figure 2. Composition and biomass of the benthos While the high macrophytobenthic biomass in the centre of the lagoon, is a result of the high abundance of a cushion-shaped Cyanophyceae spp. at station 90. Animal biomass is significantly correlated with depth, and plant biomass with mud percentage (Table 2). Table 2. Relations between biological parameters and environmental parameters (ATP in ng/cm2 ; Chlorophyll a and Phaeopigments in mg/cm2 ; Density in ind/m2; Biomass in gAFDW/m2; Mean grain size in mm ; % hard bottom = hard bottom cover percentage ; Depth in m ; Sediment thickness in cm ; % mud = percentage of grain size < 63 |im, r = coefficient of correlation, P= probability as follows : * : P<, ** : P<\, ns : not significant). Mean grain % hard Depth Sediment % size bottom thickness mud r P r P r P r P r P ATP ns ** ns ** ns Chlorophyll a ns * ns ns ns Phaeopigments ns ** ns ** ns Number of taxa per sampling station ** ** ** ** * Density ns ** ** ns ns Macrophytobenthic biomass ns ns ns ns ** Macrozoobenthic biomass ns ns ** ns ns Trophic structure. In the Uvea Lagoon, macrobenthic biomass is dominated by deposit-feeders ( gAFDW/m2 ; ), particularly by surface deposit- feeders (). The gastropod Cerithium sp. (cf. tenuifilosum) represents more than 50% of the latter biomass. The dominant species of deposit-swallowers are the holothurians Halodeima atra and Microthele nobilis (95% of the total biomass). The second trophic group in the lagoon are carnivores ( gAFDW/m2, ),. Please note that these images are extracted from scanned page images that may have been digitally enhanced for r
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