Calocedrus formosana Florin (Cupressaceae) is an endemic tree species in Taiwan; its timber is recognized for natural decay resistance. To examine the antitermitic and antifungal activities of leaf essential oil and its main constituents, C. formosana leaves were extracted and the essential oils analyzed by GC-MS. Bioactivity tests against the termite Coptotermes formosanus demonstrate that the LC50 value of leaf essential oil is 27.6 mg/g. Furthermore, exposure to T-muurolol caused 100% mortality at a dosage of 5 mg/g after 14 d. Leaf oil constituents displayed activity against four fungi, Lenzites betulina, Pycnoporus coccineus, Trametes versicolor, and Laetiporus sulphureus. Two compounds, alpha-cadinol and T-muurolol, exhibited the strongest antifungal activity. The LC50 values of alpha-cadinol against L. sulphureus, L. betulina, and T. versicolor are 9.9, 28.6, and 30.4 microg/ml, respectively.

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This paper foregrounds the riverfront as a re-territorialising arena of urban governance. Through a long-term study of the Xindian River in Taipei metropolis, Taiwan, we illustrate how the riverfront can be the key locus where the expansion of the urban frontier is manifested through and intertwines with the transformation of nature. While first interwoven with everyday activities of subsistence, Xindian River was gradually turned into the periphery of the city and then green space for recreation, a process actualised through infrastructure aimed at flood control and waste treatment as well as other informal activities that challenge such measures. We propose that ‘territorialisation’ and ‘folding’ are notions that can grasp asymmetrical relations embedded in the physical landscape. We argue that a riverfront landscape composed by territorialisation and heterogeneous folding reveals that the emergence of a negotiable state–society relationship is pivotal in the production of the urban riverfront of Taipei.

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