Clustered Broomrape (Orobanche fasciculata) Conservation Status Review

Review Date = 07/23/2012

View State Conservation Rank Criteria Review Date = 07/23/2012

Population Size

Score1 - Moderate: Generally 10,000-100,000 individuals.

CommentPopulation size is estimated.

Range Extent

Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.

Area of Occupancy

Score0 - High: Occurs in >25 Subwatersheds (6th Code HUC’s).

Environmental Specificity

Score1 - Moderate: Species is restricted to a specific habitat that is more widely distributed or to several restricted habitats and is typically dependent upon relatively unaltered, good-quality habitat (C Values of 5-7).

Trends

Score1 - Minor Declines: Species has experienced declines of 10-30% in population size, range extent and/or occupied area in the recent past (approximately 30 years).

CommentTrends are undocumented but likely to be declining due to reductions in sagebrush.

Threats

Score1 - Medium: 11-30% of the populations are being negatively impacted or are likely to be impacted by one or more activities or agents, which are expected to result in decreased populations and/or habitat quality and/or quantity.

Intrinsic Vulnerability

Score1-2 - Moderate to High Vulnerability.

Raw Conservation Status Score

Score 5 to 6 total points scored out of a possible 19.

