Community Capability Building for Environmental Conservation in Lake Biwa (Japan) Through an Adaptive and Abductive Approach

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Community Capability Building for Environmental Conservation in Lake Biwa (Japan) Through an Adaptive and Abductive Approach Socio-Ecological Practice Research https://doi.org/10.1007/s42532-021-00078-3 RESEARCH ARTICLE Community capability building for environmental conservation in Lake Biwa (Japan) through an adaptive and abductive approach Yasuhisa Kondo1,2 · Eiichi Fujisawa3,2 · Kanako Ishikawa4 · Satoe Nakahara1 · Kyohei Matsushita5 · Satoshi Asano6,1 · Kaoru Kamatani7,1 · Satoko Suetsugu1 · Kei Kano8,1 · Terukazu Kumazawa1 · Kenichi Sato9,1 · Noboru Okuda10,1 Received: 15 September 2020 / Accepted: 16 March 2021 © The Author(s) 2021 Abstract In the south basin of Lake Biwa, Shiga, Japan, overgrown aquatic weeds (submerged macrophytes) impede cruising boats and cause unpleasant odors and undesirable waste when washed ashore. To address this socio-ecological problem, Shiga Prefectural Government implemented a public program to remove overgrown weeds and compost them ashore to conserve the lake environment, while coastal inhabitants and occasional volunteers remove weeds from the beaches to maintain the quality of the living environment. However, these efects are limited because of disjointed social networks. We applied an adaptive and abductive approach to develop community capability to jointly address this problem by sharing academic knowl- edge with local actors and empowering them. The initial multifaceted reviews, including interviews and postal questionnaire surveys, revealed that the agro-economic value of composted weeds declined in historical and socio-psychological contexts and that most of the unengaged public relied on local governments to address environmental problems. These fndings were synthesized and assessed with workshop participants, including local inhabitants, governmental agents, businesspeople, social entrepreneurs, and research experts, to unearth the best solution. The workshops resulted in the development of an e-point system, called Biwa Point, to promote and acknowledge voluntary environmental conservation activities, including beach cleaning. It may contribute to enhancing the socio-ecological capability of communities. Additionally, ethical issues, such as publication of inconvenient truths, undesired interpretation by the researchers, and social constraints in research methods, arose through our research practice. Keywords Transdisciplinary action research · Adaptive abduction circuit · Area capability · Ethical issues · Ecological conservation · Citizen-driven environmental governance * Yasuhisa Kondo 6 Graduate School of Global Environmental Studies, Kyoto [email protected] University, Kyoto, Japan 7 College of Gastronomy Management, Ritsumeikan 1 Research Institute for Humanity and Nature, Kyoto, Japan University, Kusatsu, Shiga, Japan 2 Biwako-Chishin, Otsu, Shiga, Japan 8 Faculty of Education, Shiga University, Otsu, Shiga, Japan 3 Ohmi Data Institute, Otsu, Shiga, Japan 9 Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, 4 Lake Biwa Environmental Research Institute, Otsu, Shiga, Japan Japan 10 Research Center for Inland Seas, Kobe University, Kobe, 5 Faculty of Economics, Shiga University, Hikone, Shiga, Hyogo, Japan Japan Vol.:(0123456789)1 3 Socio-Ecological Practice Research 1 Introduction to a recent socio‑ecological the Ordinance for the Prevention of Eutrophication of problem in Japan Lake Biwa in 1980 (Ibid., p.92). Under this ordinance, the public sewerage systems were improved. Since then, Environmental deterioration can result from damaging the water quality has gradually recovered, but cyanobacte- interactions between human societies and ecosystems. This rial water blooms have been observed since 1983 (Ibid., is often perceived as a “wicked problem” that has no clear- pp.100, 110). cut solution (Norris et al. 2016, p.115; Rittel and Webber In the south basin, aquatic weeds (or submerged mac- 1973, p.160). Such a problem cannot simply be solved by rophytes in biological and ecological terms), including research experts; rather, it requires team-based collabora- endemic species like Potamogeton maackianus (sen’nin- tion with experts from diferent domains for interdiscipli- mo locally) and Hydrilla verticillata (kuromo) and exotic nary research (Kelly et al. 2019, p.150; Repko and Szostak species like Elodea nuttallii (kokanadamo) and Egeria 2020, pp.6–9), and with practitioners based at govern- densa (ōkanadamo), have been proliferating annually since ments, funding bodies, industry, non-proft organizations a substantial decrease in lake water in 1994 (Haga 2020, (NPOs), and civil society for transdisciplinary research pp.294–296; Hamabata et al. 2020, pp.105–113). This coin- (OECD 2020, p.4; Pohl et al. 2017, pp.319–323). Inter- cided with a remarkable increase in water transparency, disciplinary and transdisciplinary research can help “dis- which suggested a so-called ecological regime shift (Hama- solve” the problems, which may be perceived diferently bata et al. 2020, pp.105–113; Ishikawa and Okamoto 2015, by diferent actors. Due to the nature of the problems and pp.488–493). In 2014, weeds occupied an area comprising 2 the dynamics of diverse collaborators, the process of team- 95% (49.6 km ) of the south basin (Fig. 1d; Haga 2020, based research on socio-ecological problems is not always Table 1). as linear as conventional scientifc research, in particu- Overgrown weeds impede cruising boats. The Shiga Pre- lar because it may experience some tortuous adaptations fectural Government, responsible for the ecosystem man- in its methodological development. This study presents agement of Lake Biwa, spent 330 million yen (~ 3.1 mil- our experience of an adaptive and abductive approach to lion US dollars) on a public conservation program in 2016 address a socio-ecological problem in Lake Biwa, Japan. (Shiga Prefectural Government 2017) to mitigate the harm- ful efects of overgrown weeds. The gross annual budget, including funds for removing designated alien species, was 1.1 The problem: overgrown aquatic weeds in Lake approximately 600 million yen (Ibid., pers. comm.). In col- Biwa laboration with the afliated Ohmi Environment Conserva- tion Foundation, the prefectural government mows aquatic Lake Biwa (Biwako locally) is the largest freshwater lake weeds ofshore using special boats and devices (Fig. 1c), but (area: 670 km 2) in Japan, located in Shiga Prefecture in the the removed mass (approximately 5200 tons) was less than central part of Honshū Island (Fig. 1a, b; Kawanabe et al. 30% of the estimated total standing stock (18,173 tons; Haga 2020, p.ix). From ecological and geographical viewpoints, 2015, Table 1) in 2014. the lake consists of a mesotrophic north basin (Hokko; The mown weeds are transported to a dumpsite, where mean depth: 43 m; area: 618 km 2) and a eutrophic south they are dried and fermented for two summers. A soil micro- basin (Nanko; mean depth: 3.5 m; area: 52 km 2). The litto- bial study demonstrated the positive efects of composted ral zone of the south basin is an urbanized area (servicing weeds on terrestrial plant growth (Matsuoka et al. 2020, cities of Ōtsu, Kusatsu, Moriyama, and Yasu, from west p.451). The composted weeds are provided, free of charge, to east; see Fig. 1b) with a population of approximately to locals. The prefectural ofce also fnancially supports aca- 630,000 people, connected to the urban belt including demic and private sectors to develop technologies to prevent Kyoto, Osaka, and Kobe. Lake Biwa currently supplies aquatic weed overgrowth. potable water to 17 million people in this belt. Aquatic weeds cause unpleasant odors and undesirable The water quality of Lake Biwa, particularly in the waste when washed ashore, particularly in the summer. south basin, has signifcantly worsened since the late 1960s Occasionally, inhabitants request local municipal ofces due to population growth and industrial developments to remove decayed weeds. Under the Waste Management (International Lake Environment Committee Foundation Law, municipal ofces are responsible for clearing weeds 2014, p.100). Eutrophication caused the frst large-scale from public areas. In 2016, the Ōtsu City Ofce received 15 outbreak of red tide (i.e., overgrowth of plankton) in 1977 complaints and spent approximately 23 million yen (~ 0.22 (Ibid., p.100). To reduce the discharge of phosphorus con- million US dollars) on cleaning and disposal of weed waste tained in synthetic detergents, local homemakers launched (Suihōzan 2017, p.4). Cleaning activities rely on coastal the “Soap Movement,” which led to the enforcement of residents and occasional volunteers, and therefore, their efect is limited. 1 3 Socio-Ecological Practice Research a c Japan 500 km Shiga 60.0 d 15 km 48.6 49.6 50.0 42.7 40.0 43.0 ] Lake 27.0 Biwa 30.0 23.4 Area [sq. km 20.0 22.2 3 4 2 10.0 7.1 1 9.4 9.5 3.6 0.0 0.6 3.3 b 1936 1953 1964 19691977 19821994 1997 2000 2003 2007 2012 2014 Year Fig. 1 General information on the overgrown aquatic weeds in Lake the south basin of Lake Biwa (courtesy of the Lake Biwa Environ- Biwa. a Location of Lake Biwa in Japanese Archipelago (base map: mental Conservation Division of Shiga Prefectural Government); d https:// www. freem ap. jp/); b Location of Lake Biwa and municipali- Diachronic fuctuation of submerged macrophytes in the south basin ties in the south basin area, Shiga prefecture. 1: Ōtsu; 2: Kusatsu; 3: of Lake Biwa (after Haga 2015, Table 1; 2020, Table 1). The vertical Moriyama; 4: Yasu (base map: https:// www. freem ap. jp/); c A spe- axis represents the area of the lake surface occupied by submerged cially manufactured workboat removes overgrown aquatic weeds in
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