Appendix 3
Reference Document 3-1
A threat category for wildlife disease was added and replaces the geologic events (e.g., earthquakes, volcanos) threat described in Salafsky (et al. 2008) because impacts from the spread of infectious disease (e.g., white-nosed syndrome, chronic wasting disease) pose a more significant threat in NC. Threat category 11 (Disease & Pathogens) and the sub-categories for this threat were developed by the 2015 SWAP Revision Ranking Criteria Work Group. Table 2 describes the scope and severity of impact that each threat is likely to have on wildlife. The scope and severity descriptions are based on the scales outlined in NatureServe’s evaluation assessment report (see Tables 6 and 7 in Master et al. 2012). The evaluation uses the Bayesian style analysis shown in Figure 1 to characterize the relationship between scope and severity of the threat. The relationship between scope and severity of the impact is used to assign an overall risk category of very high, high, medium, low, or not a threat.
A score will be calculated for each of the risk categories (scope, severity) and the final threat category score will reflect a calculated average for each of the 11 threats listed in Table 1.
Table 2. Threat Scope and Severity. THREAT - SCOPE
THREAT – SEVERITY
(a) Pervasive
71-100% Affects all or most of the total population or occurrences
(a) Extreme
71-100% Likely to destroy or eliminate occurrences, or reduce the population 31-70% Likely to seriously degrade/reduce affected occurrences or habitat or reduce the population 11-30% Likely to moderately degrade/reduce affected occurrences or habitat or reduce the population 1-10% Likely to only slightly degrade/reduce affected occurrences or habitat, or reduce the population There is insufficient information to determine the severity of threats
(b) Large
31-70% Affects much of the total population or occurrences 11-30% Affects some of the total population or occurrences 1-10% Affects a small proportion of the total population or occurrences There is insufficient information to determine the scope of threats
(b) Serious
(c) Restricted
(c) Moderate
(d) Small
(d) Slight
(e) Unknown
(e) Unknown
(f) None
(f) None
2015 NC Wildlife Action Plan
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