Rapid Sampling of Suspended and Floating Microplastics in Challenging Riverine and Coastal Water Environments in Japan

Environmental sampling plays an important role in quantitative and qualitative investigation of plastic pollution. Rivers are a major source, carrying plastic litter into the oceans. Microplastic sampling in riverine and coastal environments is often a challenging task due to limited access, time taken, costs, human resources, etc. Our present study evaluated the performance of newly developed sampling devices (Albatross Mark 5 and 6 (AM-5 and AM-6)) that were suitable to collect floating and suspended microplastic samples in challenging freshwater and coastal environments (95 locations). Our observations indicated a similar magnitude of microplastic concentrations with AM-5 and AM-6 sampling compared to conventional plankton nets. The sampling duration, originally 10–60 min (by plankton net), was reduced to 3 min (AM-5 and AM-6) for sampling water volumes of approximately 10 m3. The developed AM-6 device was used to collect samples from riverine and coastal environments in Japan. The microplastic particle polymer composition (using Fourier transform infrared spectrophotometry (FT-IR)), size, and shape (microscopic images) were investigated. The observations showed a statistically significant particle size reduction from the riverine to coastal areas. The dominant polymer types detected were polyethylene (PE) and polypropylene (PP). The observations were complied with the coastal microplastic observations that were reported for previous studies in Japanese water environments.

Habitat characteristics of the Japanese water shrew, Chimarrogale platycephalus

To determine the habitat characteristics of the Japanese water shrew, Chimarrogale platycephalus, seven stream parameters were studied along five streams. The shrew occurred along three of those streams. To evaluate the stream parameters related to water shrew occurrence as an objective variable, a generalized linear model analysis of the five streams was performed. The results indicated that current velocity was the most important parameter in shrew occurrence at p<0.001. The present findings are similar to those for the European water shrew, Neomys fodiens. The number of invertebrates as availability of food resources, however, was not a significant parameter influencing shrew occurrence. Along the banks of the two streams inhabited by C. platycephalus, there are artificially managed leisure fishing sites, and small fish farms have released fish regularly into the streams to stock up fishing resources. Such management of leisure fishing may provide the water shrews with fish as an additional food resource and possibly contribute to the occurrence of C. platycephalus.

Hybrid Pathways to Orthodoxy in Brunei Darussalam: Bureaucratised Exorcism, Scientisation and the Mainstreaming of Deviant-Declared Practices

This article investigates the bureaucratisation of Islam in Brunei and its interlinkages with socio-cultural changes. It elucidates how realisations of state-enforced Islamic orthodoxy and purification produce locally unique meanings, while simultaneously reflecting much broader characteristics of the contemporary global condition. The article first introduces a theoretical perspective on the bureaucratisation of Islam as a social phenomenon that is intimately intertwined with the state's exercise of classificatory power and related popular processes of co-producing, and sometimes appropriating symbolic state power. Second, it outlines the historical trajectory of empowering Brunei's national ideology, Melayu Islam Beraja (MIB). It then explores social imaginaries and bureaucratic representations of “deviant”-declared practices, before illustrating how these practices become reinvented within the parameters of state power as “Sharia-compliant” services to the nation state. Simultaneously, national-religious protectionism is paradoxically expressed in thoroughly globalised terms and shaped by forces the state cannot (entirely) control. Newly established Sharia-serving practices become culturally re-embedded, while also flexibly drawing upon multiple transnational cultural registers. In the main ethnographic example, bureaucratised exorcism, Japanese water-crystal photography and scientisation fuse behind the “firewall” of MIB. These hybrid pathways to orthodoxy complicate the narratives through which they are commonly framed.

Green Period Characteristics and Foliar Cold Tolerance in 12 Iris Species and Cultivars in the Yangtze Delta, China

Iris (Iris sp.) is a popular and widely planted herbaceous perennial. However, most iris species go dormant without any aesthetic quality for 5–6 months in the transition zone between the temperate and subtropical climates. To investigate the effects of species/cultivars, leaf shape, and air temperature conditions on the ability to stay green, 12 popular species and cultivars in the transition zone were evaluated. Iris tested included the following species: roof iris (I. tectorum), japanese iris (I. japonica), long leafed flag (I. halophila), yellow flag (I. pseudacorus), blood iris (I. sanguinea), japanese water iris (I. ensata), and small-flower iris (I. speculatrix) and the following cultivars: ‘Chinensis’ milky iris (I. lactea var. chinensis), ‘Bryce Leigh’ louisiana iris (I. hexagonae), ‘Black Swan’ german iris (I. germanica), ‘Careless Sally’ siberian iris (I. sibirica), and ‘Loyalty’ japanese water iris (I. ensata). We conducted a 2-year field study on mature iris populations and evaluated the percentage of green leaves during winter retention and spring recovery using a digital image analysis (DIA). Green period during this study was calculated using predicted sigmoid curves based on the percentage of green leaves. The present study revealed that iris species/cultivars and air temperatures had considerable influence on the duration of the green period. Both evergreen and deciduous iris phenotypes exist with three different leaf shapes, among which the average green period of fan-shaped leaf iris species and cultivars was the longest. Because there was no significant (P = 0.205) relationship between green period during this period and leaf lethal temperature (LT50), new cultivars with long green periods may be achieved without a simultaneous loss of cold tolerance in iris.