[MCN] Sustainable groundwater --> sustainable trout

[Lance Olsen]

Ecology of Freshwater Fish - Early View (Online 
Version of Record published before inclusion in 
an issue)
Article first published online: 14 DEC 2015
DOI: 10.1111/eff.12267

Projected impacts of climate change on stream 
salmonids with implications for resilience-based 
management
Andrew K. Carlson, William W. Taylor, Kelsey M. 
Schlee, Troy G. Zorn andDana M. Infante
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"As baseflow index (i.e., relative groundwater 
input) increased, stream thermal sensitivity 
(i.e., relative susceptibility to temperature 
change) decreased."
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Keywords:
brook charr; brown trout; rainbow trout; Michigan; temperature; resilience

Abstract
http://onlinelibrary.wiley.com/doi/10.1111/eff.12267/abstract

The sustainability of freshwater fisheries is 
increasingly affected by climate warming, habitat 
alteration, invasive species and other drivers of 
global change. The State of Michigan, USA, 
contains ecologically, socioeconomically valuable 
coldwater stream salmonid fisheries that are 
highly susceptible to these ecological 
alterations. Thus, there is a need for future 
management approaches that promote resilient 
stream ecosystems that absorb change amidst 
disturbances. Fisheries professionals in Michigan 
are responding to this need by designing a 
comprehensive management plan for stream brook 
charr (Salvelinus fontinalis), brown trout (Salmo 
trutta) and rainbow trout (Oncorhynchus mykiss) 
populations. To assist in developing such a plan, 
we used stream-specific regression models to 
forecast thermal habitat suitability in streams 
throughout Michigan from 2006 to 2056 under 
different predicted climate change scenarios. As 
baseflow index (i.e., relative groundwater input) 
increased, stream thermal sensitivity (i.e., 
relative susceptibility to temperature change) 
decreased. Thus, the magnitude of temperature 
warming and frequency of thermal habitat 
degradation were lowest in streams with the 
highest baseflow indices. Thermal habitats were 
most suitable in rainbow trout streams as this 
species has a wider temperature range for growth 
(12.0-22.5 °C) compared to brook charr 
(11.0-20.5 °C) and brown trout (12.0-20.0 °C). 
Our study promotes resilience-based salmonid 
management by providing a methodology for stream 
temperature and thermal habitat suitability 
prediction. Fisheries professionals can use this 
approach to protect coldwater habitats and 
drivers of stream cooling and ultimately conserve 
resilient salmonid populations amidst global 
change.


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"'Friends," said he, 'the taxes are indeed very 
heavy, and, if those laid on by the government 
were the only ones we had to pay, we might more 
easily discharge them; but we have many others, 
and much more grievous to some of us. We are 
taxed twice as much by our idleness, three times 
as much by our pride, and four times as much by 
our folly  ....   "   

"Away then with your expensive follies, and you 
will not then have so much cause to complain of 
hard times, heavy taxes, and chargeable families 
....  "      

"Here you are all got together at this sale of 
fineries and knick-knacks. You call them goods; 
but, if you do not take care, they will prove 
evils to some of you."

Benjamin Franklin, "The Way to Wealth" (1758).
[The classic Franklin summary of his advice from Poor Richard's Almanac.]
http://www.swarthmore.edu/SocSci/bdorsey1/41docs/52-fra.html
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