The Species Composition and the Impacts on Vegetation of Medium to Large Herbivorous Mammals at Tataka in Yushan National Park, 2020-2021
From February 2020 to August 2021, recording 14 species of mammals and 29 species of birds. Muntiacus reevesi (Reeves's muntjac) had the highest activity index, followed by Formosan sambar. Formosan sambar has nocturnal activities with an activity peak at 7:00- 8:00 pm, while Reeves's muntjac and Naemorhedus swinhoei (Formosan serow) activity period were all day with activity peaks at both 5:00 to 6:00 am and 5:00-6:00pm.Combined the results of long-term monitoring plots, surveys along the road-side and belt transect surveys, the Formosan sambars had a preference for tree species and DBH size of bark stripping and antler rubbing. Schefflera taiwaniana and Photinia niitakayamensis were the most two favorite tree species of gnawing pressure. Moreover, the tree sizes from DBH 5- 25cm the size was prefered by Formosan sambars. The rate of debarking along the Yushan forest road has increased significantly. The research team collected 300 dung heap samples, of which 35 were detected with parasitic infections, all of which were from Formosan sambars. The parasites detected included Strongyloides sp., Oesophagostomum radiatum, Cooperia pectinita, Eurytrema pancreaticum, Ascaris equorum, Strongyloides papillosus, and two unknown species of nematode egg. Besides, fibers were found in the dung heap samples of Formosan sambar, and the researchs suspected that were plastic fibers.