The timeframe of this project spanned from January 1, 2024, to June 30, 2026. with an elevational span ranging approximately from 1,500 to 3,805 m. This study comprised 5 primary survey routes, and conducted biological resource surveys and evaluations targeting two state-owned forest lands adjacent to the Northwest Park that have not yet been included in protected areas. A total of 670 species across 323 genera and 125 families of vascular plants were recorded within the survey area. Among them, according to The Red List of Vascular Plants of Taiwan 2017, 2 species were classified as Critically Endangered (CR), 5 species as Endangered (EN), 19 species as Vulnerable (VU), 22 species as Near Threatened (NT), and 14 species as Data Deficient (DD). Additionally, 6 alien plant species across 6 genera and 5 families were recorded. Among these, Digitalis purpurea maintains a stable population across the high-altitude zone of the entire region, diffusing primarily along forest roads and landslide areas, making its removal significantly difficult; conversely, Perilla frutescens and Datura stramonium are confined to the perimeters of old tribal settlement relics, showing no distinct expansion trend. A total of 104 vegetation sampling plots were surveyed, including 47 arboreal plots, 24 shrub plots, and 33 herbaceous plots. Among these, 6 permanent arboreal plots and 4 permanent shrub plots were established, and statistical and canonical correspondence analysis (CCA) were performed against 8 direct and indirect environmental factors. Regarding fauna, 15 species across 15 genera and 9 families of mammals were recorded, including the Endangered protected species Ursus thibetanus formosanus, along with other protected species such as Capricornis swinhoei, Rusa unicolor swinhoei, and Martes flavigula chrysospila. Evaluated under the 2024 Red List of Terrestrial Mammals of Taiwan, there is 1 Nationally Endangered (NEN) species and 1 Nationally Vulnerable (NVU) species. Through the analysis of the occurrence index (OI) from automatic camera traps, the Junda Forest Road Route and the Sighing Bay Route emerged as zones with higher species diversity, with Rusa unicolor swinhoei serving as the dominant species within the region. Birds comprised 78 species across 70 genera and 34 families, including the Endangered protected species Nisaetus nipalensis; 15 Valuable and Rare protected species (Accipiter virgatus, Ictinaetus malaiensis, Spilornis cheela, Garrulax albogularis, Garrulax caerulatus, Enicurus scouleri, Machlolophus holsti, Lophura swinhoii, Syrmaticus reevesii, Dryocopus martius, Picus canus, Glaucidium brodiei, Strix aluco, Glaucidium passerinum, and Sittiparus castaneoventris); and 13 Other Deserving Conservation protected species (Actinodura morrisoniana, Garrulax morrisonianus, Liocichla steerii, Myiomela leucura, Cyornis vivax, Phoenicurus fuliginosus, Tarsiger indicus, Tarsiger johnstoniae, Parus monticolus, Periparus ater, Arborophila crudigularis, Regulus goodfellowi, and Yuhina brunneiceps). Evaluated under the 2024 Red List of Birds of Taiwan, 5 species were classified as Nationally Vulnerable (NVU). Furthermore, 3 species across 3 genera and 2 families of amphibians, 4 species across 4 genera and 2 families of reptiles, 65 species across 59 genera and 28 families of insects, and 16 species across 16 genera and 11 families of land snails and bivalves were documented. This project's surveys confirm that the population of Rusa unicolor swinhoei exhibits a significant increasing trend, and its bark-stripping and antler-rubbing behaviors are particularly severe in mid-to-high altitude regions. Severely impacted coniferous and broad-leaved tree species include Chamaecyparis formosensis, Abies kawakamii, Tsuga chinensis, Alnus formosana, and Acer morrisonense. In certain areas, high proportions of trunk girdling have resulted in elevated tree mortality rates, which has severely disrupted natural forest succession and hindered the regeneration of small-diameter class timber. Based on the aforementioned survey results, this project proposes the following management and future research recommendations: 1. Conduct re-surveys of the established permanent plots every five years to commit to long-term management and species trend assessments. 2. Investigate deeply into the intensity of the impact exerted by Rusa unicolor swinhoei on forest succession and vegetation regeneration, and evaluate the timely implementation of exclosure fencing or related prevention and management strategies. 3. Continuously monitor the population interaction relationships and living patterns of Ursus thibetanus formosanus, and establish prevention and control measures for human-bear conflicts. 4. Establish a tribal co-management mechanism and concrete strategies for sustainable management in the Wushuang Area, encompassing wildlife monitoring, prevention of illegal poaching and logging, and feasibility assessments for ecotourism development. 5. In response to years of natural environmental transformations and to serve as a basis for the Fifth General Review of Yushan National Park, the report submits recommendations for zoning adjustments: designate the Junda Creek Basin and the perimeter along the Junda Forest Road as Ecological Protection Zones; and consider incorporating currently unprotected state-owned forest lands, such as the Sighing Bay Area, the Taiping Valley Area, and the Wushuang Area, into the boundaries of Yushan National Park, delineating them as Ecological Protection Zones or Historical Monument Conservation Zones.