Laserfiche WebLink
<br />Management Situation by Revision Topic <br /> <br />I . Current estimates for potential old-growth acreage on the RGNF are: aspen -- 61,100 acres, sprucelfir <br />__ 147,250 acres, Douglas-fir -- 37,700 acres, ponderosa pine -- 20,350 acres, lodgepole pine -- 700 <br />acres, and bristlecone pine -- 15,000 acres. These acres are based on the definition listed in Table 11I- <br />6. The new regional criteria for old growth, which are listed above, may change the acreage we are <br />now listing as old growth. We are' currently developing computer software to extract the acres of old <br />growth which meet ~ehl's criteria (1992). <br /> <br />Thrt'Jatt'JnM, Endan~erM. and St'Jn6ithit'J Plant Sp=it'J6 <br /> <br />Threatened and Endangered Plants: An endangered plant is one that is in danger of extinction <br />throughout all or a significant portion of its range. A threatened plant is one that is likely to become <br />an endangered species within the foreseeable future throughout all or a significant portion of its <br />range. Some states also have declared certain species as threatened through their regulations or <br />statutes. <br /> <br />Threatened and endangered plants are determined and listed by the USDI Fish and Wildlife Service <br />(USFWS) in 50 CFR 17.1;2, August 29, 1992. There are no documented records or suspected <br />occurrences of threatened or endangered plants on the RGNF. Colorado's threatened and <br />endangered plants have unique habitats or ranges that do not occur on the RGNF. There are also no <br />proposed plants for listing that occur on the RGNF (personal communication, February 3, 1993, with <br />lucy Jordan, USFWS and Dean Erhard}. ' <br /> <br />Sensitive Plants: The Forest Service (1991) defines a sensitive plant as one that is not presently listed <br />as threatened or endangered by the U~FWS, but a population viability concern has been identified <br />by: <br /> <br />a) Significant current or predicted downward trends in population numbers or density. <br /> <br />b) Significant current or predicted downward trends in habitat capability that would reduce a <br />species' existing distribution. <br /> <br />The Regional Forester has identified sensitive species for the Rocky Mountain Region and there are <br />five sensitive plants known to occur on the RGNF. Documented locations of sensitive plants came <br />from Forest maps, files, and records from the Colorado Natural Heritage data base. Table 111-7 lists <br />the sensitive plant species known or suspected to occur on the RGNF. <br /> <br />\ <br /> <br />" <br />" <br /> <br />, <br />, <br /> <br />111-26 <br /> <br />ii' '0.1 J' 9 <br />'-J'" i <br /> <br />( <br />