Desarrollo de la Antártica

Takesi Nagata / THE ADVANCEMENT OF SClENTIFIC RESEARCH '" as tihe primary producers to the final consumers such as Baleen whales or Sperm whales is very much simple. In the food chains s:hown in Fig. 14, tJhe most important zoo– planktons would be Eupihausia sU'rperba (krills) as indicated by the thick lines connecting to phyto-planktons on one side and fishes, birds, crab-eater seals and Baleen whales on the other side. The biomass of Euphausia superba is approximately equivalent that ol alI other zoo-planktons in the Antarctic Ocean (Actually, those krills frequently form dense patches of 4 '-""' 100 kgjm3 in density, whereas dhe density is about 4 gmjm 3 in other parts of the sea surface) , and they are found in a broad zone from the pack ice areas near the Antarctic coast to the Antarctic convergence lineo The marine food chain system particularly in the paok ice zone may be interesting in relation to Figures 13 and 14. Fig. 15 illustrates a diagram of food-chain relationships in the pack-ice zone, where also the fundamental food-chain of phyto-plankton -+ zoo-plankton -+ fishes, sea birds and seals can be dearly observed. The over-al1 picture of food chain relatiomfuips among various kinds 01 lives 00 flRST TROPHIC LEVEt" SECONO T"ROPHIC LEVEL Pru'Nry ~Mlcro"'gilt ) COl'\5vmer. fH!RO TROPHIC LEVEt,. Stcor,d.IfY (C.fn¡1I0rlHJJ ) Conlam«rs FOiJ!HH iROPHfC L€V€L Yerf¡¡l'? t Pred~!Qfy i COI'!$umtr. FOOO CHAIN RELATIONSHIPS IN THE PACK ICE ZONE e,,", }- ICE jUG1WE lHE NEOIVM ~ HUlR H S C¡!ICVI..All!)lt lE f ".""IV" ! PHYTOPLANKTON DETRITUS I Food..chlin rel;,ationships in [he p:H:'l~:·ice zone. Dascd oo •• unp'ubllshed figure by Andri.:u:hcv. ( After Knox. 1970) Fig. 15