SCOPE
SEVERITY
(a) Pervasive Affects all or most (71-100%) of the total population or occurrences (b) Large Affects much (31-70%) of the total population or occurrences (c) Restricted Affects some (11-30%) of the total population or occurrences (d) Small Affects a small (1-10%) proportion of the total population or occurrences (e) Unknown There is insufficient information to determine the scope of threats
(a) Extreme Likely to destroy or eliminate occurrences, or reduce the population 71-100%
VERY HIGH
HIGH
(b) Serious Likely to seriously degrade/reduce affected occurrences or habitat or reduce the population 31-70% (c) Moderate Likely to moderately degrade/reduce affected occurrences or habitat or reduce the population 11-30% (d) Slight Likely to only slightly degrade/reduce affected occurrences or habitat, or reduce the population 1-10%
AQUATIC SNAILS
(e) Unknown There is insufficient information to determine the severity of threats
Taxa Team Evaluation
(f) None
(f) None
Results
LOW
MEDIUM
1 = Unknown 0 = None
9.01 Residential and commercial development
9.02 Agriculture and Aquaculture
9.03 Energy production and mining
9.04 Transportation and service corridors
9.05 Biological resource use
9.06 Human intrusions and disturbance
9.07 Natural system modifications
9.08 Invasive, other problematic species and genes
9.09 Pollution
9.10 Climate change and severe weather
9.11 Disease and pathogens
Common Name
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
(some may be provisional)
(a) Scope
(b) Severity
9.01 SCORE
(a) Scope
(b) Severity
Metric 9.02
(a) Scope
(b) Severity
Metric 9.03
(a) Scope
(b) Severity
Metric 9.04
(a) Scope
(b) Severity
Metric 9.05
(a) Scope
(b) Severity
Metric 9.06
(a) Scope
(b) Severity
Metric 9.07
(a) Scope
(b) Severity
Metric 9.08
(a) Scope
(b) Severity
Metric 9.09
(a) Scope
(b) Severity
Metric 9.10
(a) Scope
(b) Severity
Metric 9.11
Mud Amnicola Waccamaw Snail
f
f
0
e
a
5
f
f
0
f
f
0
f
f
0
f
f
0
f
f
0
e
a
5
e
a
5
e
a
5
f
f
0
Bloodfluke Planorb Pointed Campeloma
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
f f
f f
0 0
e e
e e
1 1
e e
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
File Campeloma
f
f
0
f
f
0
e
1
Chinese Mystery Snail Japanese Mystery Snail Savannah Elimia Gravel Elimia
e a
e e
1 5
e a
e e
1 5
e a
e e
1 5
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
Christy's Elimia (Knotty Elimia)
a
e
5
d
d
3
e
e
1
e
e
1
Club Elimia Lapped Elimia Sprite Elimia
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
f
f
0
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
a
e e
5
e e
e e
1 1
e e
e e
1 1
Fine-ridged Elimia Smooth Elimia Symmetrical Elimia
d
d
3
e e e
e e e
1 1 1
e e e
e e e
1 1 1
e e e
e e e
1 1 1
e
e e e
1
e e e
e e e
1 1 1
e e e
e e e
1 1 1
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
Piedmont Elimia
f
f
0
a
5
Fragile Ancylid Blackwater Ancylid Oblong Ancylid Creeping Ancylid Waccamaw Siltsnail Watercress Snail Carib Fossaria Marsh Fossaria Golden Fossaria Buffalo Pebblesnail Flexed Gyro Ash Gyro Excentric Ancylid Two-ridged Rams-horn Greenfield Rams-horn
f
f
0
e
a
5
f
f
0
f
f
0
f
f
0
f
f
0
f
f
0
e
a
5
e
a
5
e
a
5
f
f
0
e a
e a
1
e e
e e
1 1
e a
e a
1
f f
f f
0 0
e a
e a
1
e a
e a
1
e e
e e
1 1
a a
e a
5
e a
e a
1
10
f
f
0
10
10
10
10
10
e
e
1
Dusky Ancylid Crested Mudalia
e
e
1
e
e
1
e b a e
e e e e
1 5 5 1
e e e e
e e e e
1 1 1 1
e e e e
e e e e
1 1 1 1
e e e e
e e e e
1 1 1 1
e e e e
e e e e
1 1 1 1
Seep Mudalia
d a
d e
3 5
d d
d d
3 3 0
e e
e e
1 1
e e
e e e
1 1
Smooth Mudalia Ridged Lioplax
a e
e e
5 1
a e
e e
5 1
f
f
Henscomb Hydrobe Squat Duskysnail Giant Rams-horn Red-rim Melania
Marsh Sprite Bugle Sprite Olive Nerite Tadpole Physa
Bayou Physa Pewter Physa Glossy Physa Seminole Rams-horn Magnificent Rams-horn
a e
a e
10
a e
a e
10
f f
f f
0 0
a e
a e
10
f f
f f
0 0
a e
a e
10
a e
a e
10
e e
e e
1 1
a a
a e
10
a e
a e
10
e
e
1 0
Marsh Rams-horn Thicklip Rams-horn Dainty Hornsnail Pagoda Hornsnail Slender Walker
1
1
1
1
1
5
1
f
f
c
c
3
c
c
3
e
e
1
e
e
1
e
e
1
e
e
1
e
e
1
e
e
1
e
e
1
e
e
1
e
e
1
2020 Addendum NC Wildlife Action Plan
Updated July 2020
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