摘要
In order to understand the pattern and status of plant species in the forest-meadow ecotonein Sanjiangyuan Nature Reserve, this study was undertaken through expert consultation, literaturesurvey and fieldwork in various parts of the ecotone during 2002-2004. Based on 3 important systems,i.e. threatened status, genetic loss effect and use value, the list of threatened and prioritized plants wasestablished. In this paper, the threatened coefficient was defined as the criteria of category for threatenedplants, the conservation priorities coefficient summed by threatened coefficient, genetic coefficient anduse value coefficient was defined as the criteria of prioritized plants. In addition, 10 indicators toevaluate threatened grading and conservation priorities sequence were included in the 3 importantsystems. The weights of 3 systems and 10 indicators were given through expert consultation andanalytic hierarchy process. Ten indicators were given scores based on the subcriteria, respectively, andall the scores of the 3 systems were summed up for each species, then contrasted to the criteria ofthreatened grading and conservation priorities for plant species. The status of endangerment andconservation priorities of plant species were analyzed, and the results showed that the number ofendangered species was 2, vulnerable species 37, near threatened species 140, safe species 767; the firstconcern category had 4 species, the second concern category 18, the third concern category 150 and theleast concern category 774.
In order to understand the pattern and status of plant species in the forest-meadow ecotone in Sanjiangyuan Nature Reserve, this study was undertaken through expert consultation, literature survey and fieldwork in various parts of the ecotone during 2002-2004. Based on 3 important systems, i.e. threatened status, genetic loss effect and use value, the list of threatened and prioritized plants was established. In this paper, the threatened coefficient was defined as the criteria of category for threatened plants, the conservation priorities coefficient summed by threatened coefficient, genetic coefficient and use value coefficient was defined as the criteria of prioritized plants. In addition, 10 indicators to evaluate threatened grading and conservation priorities sequence were included in the 3 important systems. The weights of 3 systems and 10 indicators were given through expert consultation and analytic hierarchy process. Ten indicators were given scores based on the subcriteria, respectively, and all the scores of the 3 systems were summed up for each species, then contrasted to the criteria of threatened grading and conservation priorities for plant species. The status of endangerment and conservation priorities of plant species were analyzed, and the results showed that the number of endangered species was 2, vulnerable species 37, near threatened species 140, safe species 767; the first concern category had 4 species, the second concern category 18, the third concern category 150 and the least concern category 774.
基金
This research is one part of "The Rapid Evaluation Technology of Threatened Species in Sanjiangyuan Nature Reserve " (2001BA510B10-03), which is supported by the National Advanced Project of the Tenth Five-year Plan.
