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<br /> 2 <br /> ) <br /> 4 <br /> 5 <br />ITllAM . <br />0..... <br /> 7 <br /> I <br /> . <br /> 10 <br /> 11 <br /> 12 <br /> <br />85 <br /> <br />BIotIC Nt'T1l.1ENT POOL <br /> <br />DOH '" 110M ~ny <br />I <br /> <br />SPUlALlNG <br /> <br />j <br />t <br /> <br />"'11Tl0. <br /> <br />PROCJ:SSING <br /> <br /> <br />AlIOTIC NUTRIENT POOL <br /> <br />SPIR.Al.ING_ <br /> <br />IIOtlC NUtRIENT POO <br /> <br />SPIRALING <br /> <br />\ <br /> <br />CliANNEL WIDn <br /> <br />F1.un 6. Nutrient Spiraliog. Where ret:etlUoa h blab. .ph'aUnl h <br />Ilow. Wher. rlt'nUoa. :I.. low. Ipda11ftl ... w:rlt !'alii.. Budwuer <br />atre.. tlad to ba.. ,re.ter nt'Dtion aDeI dOllll!' ~lr.Uftl and large <br />Un... teud to hn. 1... nteation and lIOn uplcl Iplral1ng. <br /> <br />apparently differs depending on the interaction between physical retention <br />and biological activity. Large amounts of organic matter and nutrients <br />will tend to be processed when turnover distance and time is shorr. Thus <br />relatively fast rates of recycling occur be,:ause of short time delays in <br />moving from the biotic to the abiotic compartments and back again. 1'1 <br />contrast, cold, fast-flowing streams that have few ret.:ntion mechanisms <br />tend to be more conduit-like, may have slow rates of rE:cycling and long <br />distances between spirals, and may export a large proportion of the <br />material they receive and produce. Streams with relatilvely high retention <br />and slow-to-moderate rates of biological aCI:ivity tend to store relatively <br />large amounts of organic matter (Minshall el: al. 1983)" <br /> <br />_~.~,_~'I~"_\">"'iI!'<"~'~-C-"' <br />