渐危种 meaning in Chinese

vulnerable species

In this dissertation , the author analyzed plant biodiversity in yunmengshan forest region with field survey on plant species and forest vegetation , the results show that : the vascular plants in yunmengshan forest region include 548 species ( variation ) which belong to 319 genera , 98 families , the flora geographical composition are complex , the dominant characteristics of flora are temperate zone plants which account for 55 percent , herbaceous species occupy 75 percent exclusively . evaluating the threatened hierarchy of plants in yunmengshan forest region , the results show that the number of critically endangered species is 7 , endangered species isll , vulnerable species is 53 , lower risk species is79 , safty species 376
本文在对云蒙山林区的植物物种、植被进行调查的基础上，进行植物多样性分析，研究结果如下：云蒙山林区共有维管束植物98科319属548种和变种，地理成分复杂，包括中国全部属的15个分布区类型，区系组成以温带成分为主，占55 ；生活型谱中，草本植物种类占绝对优势，比例为75 . 3 ；通过濒危评价，得出云蒙山林区植物极危种7种，濒危种11种，渐危种53种，敏感种79种，安全种376种。