<s>
Mesohabitat	B-Application
simulation	I-Application
model	I-Application
(	O
MesoHABSIM	O
)	O
,	O
created	O
by	O
Dr.	O
Piotr	O
Parasiewicz	O
,	O
addresses	O
the	O
requirements	O
of	O
watershed-based	O
management	O
of	O
running	O
waters	O
and	O
is	O
designed	O
to	O
predict	O
an	O
aquatic	O
community	O
's	O
response	O
to	O
habitat	B-Application
modification	O
.	O
</s>
<s>
MesoHABSIM	O
builds	O
upon	O
pre-existing	O
physical	O
habitat	B-Application
simulation	O
models	O
(	O
e.g.	O
</s>
<s>
Fish	O
data	O
is	O
collected	O
in	O
randomly	O
distributed	O
mesohabitats	O
where	O
habitat	B-Application
surveys	O
are	O
also	O
conducted	O
.	O
</s>
<s>
This	O
allows	O
modeling	O
of	O
available	O
fish	O
habitat	B-Application
at	O
a	O
range	O
of	O
flows	O
.	O
</s>
<s>
Rating	O
curves	O
represent	O
the	O
changes	O
in	O
relative	O
area	O
of	O
suitable	O
habitat	B-Application
in	O
response	O
to	O
flow	O
and	O
allow	O
for	O
the	O
determination	O
of	O
habitat	B-Application
quantity	O
at	O
any	O
given	O
flow	O
within	O
the	O
range	O
of	O
surveys	O
.	O
</s>
<s>
These	O
rating	O
curves	O
can	O
be	O
developed	O
for	O
river	O
units	O
of	O
any	O
size	O
allowing	O
conclusions	O
to	O
be	O
drawn	O
about	O
the	O
suitability	O
of	O
channel	O
patterns	O
or	O
habitat	B-Application
structures	O
for	O
various	O
species	O
of	O
fish	O
for	O
specific	O
sections	O
as	O
well	O
as	O
for	O
the	O
entire	O
river	O
.	O
</s>
<s>
In	O
combination	O
with	O
hydrologic	O
time	O
series	O
,	O
rating	O
curves	O
are	O
used	O
to	O
create	O
Continuous	O
Under	O
Threshold	O
(	O
CUT	O
)	O
curves	O
for	O
the	O
analysis	O
of	O
frequency	O
,	O
magnitude	O
and	O
duration	O
of	O
significant	O
habitat	B-Application
events	O
.	O
</s>
<s>
(	O
1995	O
)	O
defines	O
critical	O
thresholds	O
and	O
determines	O
what	O
habitat	B-Application
variability	O
and	O
availability	O
is	O
necessary	O
to	O
support	O
the	O
target	O
river	O
fauna	O
.	O
</s>
<s>
CUT	O
curves	O
evaluate	O
durations	O
of	O
unsuitable	O
habitat	B-Application
under	O
a	O
specified	O
threshold	O
by	O
comparing	O
continuous	O
durations	O
in	O
days	O
under	O
this	O
threshold	O
to	O
the	O
cumulative	O
durations	O
in	O
the	O
study	O
period	O
.	O
</s>
<s>
To	O
use	O
physical	O
habitat	B-Application
models	O
to	O
analyze	O
and	O
predict	O
ecosystem	O
potential	O
,	O
compositions	O
must	O
also	O
be	O
determined	O
of	O
the	O
native	O
fish	O
community	O
and	O
a	O
subset	O
of	O
species	O
must	O
be	O
selected	O
for	O
model	O
development	O
.	O
</s>
<s>
Securing	O
habitat	B-Application
for	O
naturally	O
occurring	O
dominant	O
species	O
(	O
ecology	O
)	O
should	O
preserve	O
the	O
most	O
profound	O
characteristics	O
of	O
the	O
ecosystem	O
,	O
providing	O
survival	O
conditions	O
for	O
the	O
majority	O
of	O
the	O
aquatic	O
community	O
and	O
therefore	O
a	O
reference	O
for	O
restoration	O
efforts	O
.	O
</s>
<s>
The	O
simplest	O
way	O
to	O
create	O
a	O
river	O
habitat	B-Application
model	O
is	O
therefore	O
to	O
select	O
the	O
five	O
to	O
ten	O
highest	O
ranking	O
species	O
for	O
model	O
development	O
.	O
</s>
<s>
It	O
can	O
then	O
be	O
assumed	O
that	O
community	O
structure	O
reflects	O
habitat	B-Application
structure	O
;	O
therefore	O
,	O
the	O
most	O
common	O
species	O
should	O
indicate	O
the	O
most	O
common	O
habitat	B-Application
.	O
</s>
<s>
Since	O
habitat	B-Application
availability	O
forms	O
the	O
structure	O
of	O
aquatic	O
fauna	O
,	O
the	O
affinity	O
between	O
the	O
structure	O
of	O
the	O
river	O
habitat	B-Application
and	O
the	O
structure	O
of	O
the	O
fish	O
community	O
can	O
be	O
used	O
as	O
a	O
measure	O
of	O
habitat	B-Application
quality	O
.	O
</s>
<s>
Parasiewicz	O
,	O
P	O
.	O
(	O
2007	O
)	O
:	O
Developing	O
a	O
reference	O
habitat	B-Application
template	O
and	O
ecological	O
management	O
scenarios	O
using	O
the	O
MesoHABSIM	O
model	O
.	O
</s>
<s>
Assessment	O
and	O
restoration	O
of	O
instream	O
habitat	B-Application
of	O
the	O
Eightmile	O
River	O
in	O
Connecticut	O
–	O
Developing	O
MesoHABSIM	O
model	O
.	O
</s>
<s>
Fish	O
habitat	B-Application
assessment	O
on	O
Stony	O
Clove	O
Creek	O
,	O
NY	O
using	O
MesoHABSIM	O
.	O
</s>
<s>
Parasiewicz	O
P	O
.	O
&	O
M	O
.	O
B	O
.	O
Bain	O
(	O
2000	O
)	O
:	O
MesoHABSIM	O
or	O
modeling	O
of	O
physical	O
habitat	B-Application
at	O
the	O
scale	O
relevant	O
to	O
river	O
restoration	O
planning	O
.	O
</s>
