[MCN] Oops Re: Keeping a river together

[Lance Olsen]

My apologies: In excerpting the article named 
below, I forgot to add the concluding paragraph:

"Despite the lack of evidence of mass movement, 
our result suggested a few immigrants from the 
main stem (i.e., juvenile white-spotted charr, 
sculpin and a few relatively large Dolly Varden). 
Because more than 100 small tributaries exist in 
the Shiisorapuchi River (Koizumi 2011), only a 
few individuals escaping to each tributary should 
accumulate to a great number enough to 
re-colonise main stem habitats even if fishes in 
the main stem were extirpated. Multiple refuges 
at different spatial scales should increase 
resistance and Ž or	resilience of fish 
populations (Sedell et al. 1990; Pearsons et al. 
1992). Thus, the roles of tributaries as refuges 
would deserve further attention."

Ecology of Freshwater Fish 2012: 21: 165-167
Do small tributaries function as refuges from 
floods? A test in a salmonid-dominated 
mountainous river
Itsuro Koizumi et al
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