438 S. F. MacLean, Jr. 



Harvested by 

 next trophic level 



TUnharvested 



Production 

 J. 



Respiration 



Bio- 

 mass 

 (gm )1 



I Recycled 

 r through 



►J D.O.M. 



Feces 



Consumption 

 (kJm-^ yr-') 



Vertebrate 

 Carnivores 

 B = 0.003 T 0.03 



6.7 



145.2 



23.4 



Tnv. 

 Carn. 



J. 



5.9 



6.3 

 17.6 



-5.9 — 

 6.3 — 



123.0 



28.0 



Bacteria 



& Algae 



Grazers 



0.55 



64.9 



38.5 



76.6 

 TT28.1 



i78.7 



Fungivores ^ -^ 

 1.48 ""^-^ 



2.9 



2.9 tLLi9.2 



15.1 



Plants 



33.5 



Saprovores 

 0.91 



3222.5 

 108.4 



12.1 



J 357.8 



214.3 

 76.6 



1309.9 



Microorganisms 

 ca. 18.0 



824.4 



108.4 



180.4 



4532 



3640 



1364.3 



Dead Organic Matter 

 (22,200-45,000 to 15 cm) 



288.8 



— rf 



(Accumulation) 



FIGURE 11-8. The bioenergetic structure of the detritus-based trophic 

 system in the coastal tundra at Barrow. 



