SEVERITY (a) Extreme Likely to destroy or eliminate occurrences, or reduce the population 71-100%
SCOPE (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 (f) None
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% (e) Unknown There is insufficient information to determine the severity of threats (f) None
AQUATIC SNAILS Taxa Team Evaluation 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 (some may be provisional) Delta Hydrobe Sharp Sprite
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT
THREAT Metric 9.09
THREAT
THREAT
(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
(a) Scope
(b) Severity
Metric 9.10
(a) Scope
(b) Severity
Metric 9.11
(b) Severity
Mimic Lymnaea A Hydrobid Snail
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
f f
0 0
e e
e e
1 1
e e
e e
1 1
e e
e e
1 1
a a
e e
5 5
e e
e e
1 1
e e
e e
1 1
Panhandle Pebblesnail Two-ridge Valvata A valvatid snail Banded Mystery Snail Rotund Mystery Snail
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