Abstract
Paddy fields play an important role as alternative habitats for various wetland-dependent species. Agricultural intensification in paddy fields, however, presents serious threats to these species. Here, we examined the environmental factors, including those related to modern farming practices, affecting the distribution of the Sado wrinkled frog (Glandirana susurra) in paddy fields on Sado Island, Japan. We recorded the abundance of frogs at 42 sites in early and late June 2014 and investigated the species’ responses to several local and landscape-scale variables. We found that frog abundances decreased sharply following the drainage of paddy fields in mid-June and were negatively associated with deep concrete irrigation ditches that surrounded the paddies. The addition of conservation ditches built into rice paddy fields, however, was shown to mitigate against the effects of the drainage. Our results suggest that conservation ditches serve as refuges for G. susurra. We propose that decreasing the depth of irrigation ditches or providing structures for frogs to use and traverse the ditches could be useful approaches that help conserve G. susurra. We also suggest the increased use of conservation ditches and implementation of aquatic biotopes in the surrounding landscape might serve to aid this species’ long-term conservation.
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References
Alroy J (2015) Current extinction rates of reptiles and amphibians. Proceedings of the National Academy of Sciences 112:201508681
Amilhat E, Lorenzen K (2005) Habitat use, migration pattern and population dynamics of chevron snakehead Channa striata in a rainfed rice farming landscape. Journal of Fish Biology 67:23–34
Anderson D. R (2007) Model based inference in the life sciences: a primer on evidence. Springer Science & Business Media, Berlin
Azuma A, Takeuchi K (1999) Relationships between population density of frogs and environmental conditions in Yatsu-habitat. Journal of the Japanese Institute of Landscape Architecture 62:573–576 (in Japanese with English summary)
Baillie JEM, Hilton-Taylor C, Stuart SN (2004) IUCN red list of threatened species. A global species assessment. IUCN Gland, Switzerland and Cambridge, pp 6–18
Bartoń K (2019) MuMIn: multi-model inference. R package version 1.43.6. https://CRAN.R-project.org/package=MuMIn
Bates D, Mächler M, Bolker BM, Walker SC (2015) Fitting linear mixed-effects models using lme4. Journal of Statistical Software 67:1–48
Brinson MM, Malvárez AI (2002) Temperate freshwater wetlands: types, status, and threats. Environmental Conservation 29:115–133
Burnham K. P, Anderson D. R (2002) Model selection and multimodel inference: a practical information-theoretic approach. Springer, New York
Cushman SA (2006) Effects of habitat loss and fragmentation on amphibians: A review and prospectus. Biological Conservation 128:231–240
Donald P (2004) Biodiversity impacts of some agricultural commodity production systems. Conservation Biology 18:17–37
Dontchev K, Matsui M (2016) Food habits of the American bullfrog Lithobates catesbeianus in the City of Kyoto, Central Japan. Current herpetology 35:93–100
Elphick CS (2000) Functional equivalency between Rice fields and Seminatural wetland habitats. Conservation Biology 14:181–191
Fujioka M, Lane SJ (1997) The impact of changing irrigation practices in rice fields on frog populations of the Kanto plain, Central Japan. Ecological Research 12:101–108
Gibbs JP (2000) Wetland loss and biodiversity conservation. Conservation Biology 14:314–317
Herzon I, Helenius J (2008) Agricultural drainage ditches, their biological importance and functioning. Biological Conservation 141:1171–1183
Kassambara A (2018) ggpubr: 'ggplot2' based publication ready plots. R package version 0.2. 3. https://CRAN.R-project.org/package=ggpubr
Katayama N, Baba YG, Kusumoto Y, Tanaka K (2015) A review of post-war changes in rice farming and biodiversity in Japan. Agricultural Systems 81:1–12
Kato N, Yoshio M, Kobayashi R, Miyashita T (2010) Differential responses of two anuran species breeding in rice fields to landscape composition and spatial scale. Wetlands 30:1171–1179
Katoh K, Sakai S, Takahashi T (2009) Factors maintaining species diversity in satoyama, a traditional agricultural landscape of Japan. Biological Conservation 142:1930–1936
Keppel G, Robinson TP, Wardell-Johnson GW, Yates CJ, van Niel K, Byrne M, Schut AG (2017) A low-altitude mountain range as an important refugium for two narrow endemics in the southwest Australian floristic region biodiversity hotspot. Annals of Botany 119:289–300
Kiritani K (2000) Integrated biodiversity management (IBM) in rice fields. Integrated Pest Management Reviews 5:175–183
Kobayashi R (2014) Column: Sado wrinkled frog: an alternative symbol for wildlife-friendly farming on Sado Island? In: Usio N, Miyashita T (eds) Social-ecological restoration in Paddy-dominated landscapes, 1st edn. Springer, Tokyo, pp 115–121
Korner-Nievergelt F, Roth T, von Felten S, Guelat J, Almasi B, Korner-Nievergelt P (2015) Bayesian data analysis in ecology using linear models with R, BUGS and Stan. Elsevier, London
Lane SJ, Fujioka M (1998) The impact of changes in irrigation practices on the distribution of foraging egrets and herons (Ardeidae) in the rice fields of Central Japan. Biological Conservation 83:221–230
Luo Y, Fu H, Traore S (2014) Biodiversity conservation in rice paddies in China: toward ecological sustainability. Sustainability 6:6107–6124
Maeda N (2007) The wrinkled frog (Tsuchigaeru). In: Uchiyama R, Maeda N, Numata K, Seki S (eds) A photographic guide; amphibians and reptiles in Japan 5th edn. Heibonsya, pp 116–117 (in Japanese)
Mazerolle MJ (2005) Drainage ditches facilitate frog movements in a hostile landscape. Landscape Ecology 20:579–590
Minagawa A (2009) Conservation of freshwater fish spawning and rearing in rice paddies. In: Mizutani S, Mori J (eds) Conserving habitat of freshwater fishes inhabiting Haruno–Ogawa irrigation/ drainage ditches in Rice paddies, 1st edn. Gakuhou-sha, Tokyo, pp 31–62 (in Japanese)
Ministry of the Environment, Japan (2012) Japan integrated biodiversity information system (J-IBIS). https://ikilog.biodic.go.jp/Rdb/. Accessed 07 Oct 2019
Moore ID, Norton TW, Williams JE (1993) Modelling environmental heterogeneity in forested landscapes. Journal of Hydrology 150:717–747
Nagata H (2012) The current status of the reintroduction program of crested Ibis Nipponia nippon and its perspective on Sado Island. Reintroduction 2:11–16 (in Japanese)
Natuhara Y (2013) Ecosystem services by paddy fields as substitutes of natural wetlands in Japan. Ecological Engineering 56:97–106
Ohtani H, Sekiya K, Ogata M, Miura I (2012) (Ranidae) found on Sado Island, Japan. Journal of Herpetology 46:325–330
Osawa S, Shimada M, Katsuno T (2005) Environmental factors that regulate the density of Rana porosa porosa on the levees of flatland Paddy fields. Journal of Rural Planning Association 24:91–102 (in Japanese)
Pierluissi S (2010) Breeding Waterbirds in Rice fields: a global review. Waterbirds 33:123–132
R Core Team (2019) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org/
Sekiya K, Ohtani H, Ogata M, Miura I (2010) Phyletic diversity in the frog Rana rugosa ( Anura : Ranidae ) with special reference to a unique morphotype found from Sado phyletic diversity in the frog Rana rugosa ( Anura : Ranidae ) with special reference to a unique morphotype found from Sado Island. Current Herpetology 29:69–78
Sekiya K, Miura I, Ogata M (2012) A new frog species of the genus Rugosa from Sado Island, Japan (Anura, Ranidae). Zootaxa 62:49–62
Semlitsch RD (2009) Principles for Management of Aquatic-Breeding Amphibians Invited Paper: PRINCIPLES FOR MANAGEMENT OF AQUATIC-BREEDING AMPHIBIANS. The Journal of Wildlife Management 64:615–631
Sørensen R, Zinko U, Seibert J (2006) On the calculation of the topographic wetness index: evaluation of different methods based on field observations. Hydrology and Earth System Sciences 10:101–112
Stuart SN, Chanson JS, Cox NA et al (2004) Status and trends of amphibian declines and extinctions worldwide. Science 306:1783–1786
Trenham PC, Shaffer HB (2005) Amphibian upland habitat use and its consequences for population viability. Ecological Applications 15:1158–1168
Uruma H, Kobayashi R, Nishijima S, Miyashita T (2012) Effectiveness of conservation-oriented agricultural practices on amphibians inhabiting Sado Island, Japan, with a consideration of spatial structure. Japanese Journal of Conservation Ecology 17:155–164 (in Japanese with English summary)
Usio N (2015) Environmentally friendly farming in Japan. In: Usio N, Miyashita T (eds) Social-ecological restoration in Paddy-dominated landscapes, 1st edn. Springer, Tokyo, pp 69–86
Van Buskirk J (2005) Local and landscape influence on amphibian occurrence and abundance. Ecology 86:1936–1947
Warnes G. R, Bolker B, Lumley T. (2018) Gtools: various R programming tools
Washitani I (2007) Restoration of biologically-diverse floodplain wetlands including Paddy fields. Global Environmental Research 11:135–140
Watari Y, Nishijima S, Fukasawa M, Yamada F, Abe S, Miyashita T (2013) Evaluating the “recovery level” of endangered species without prior information before alien invasion. Ecology and Evolution 3:4711–4721
Wickham H (2011) The split-apply-combine strategy for data analysis. Journal of Statistical Software 40(1):1–29 http://www.jstatsoft.org/v40/i01/
Wickham H (2016) ggplot2: elegant graphics for data analysis. Springer-Verlag New York
Wickham H (2018) stringr: simple, consistent wrappers for common string operations. R package version 1.4.0. https://CRAN.R-project.org/package=stringr
Wyman RL (1988) Soil acidity and moisture and the distribution of amphibians in five forests of Southcentral New York. Copeia 1988:394
Zedler JB, Kercher S (2005) WETLAND RESOURCES: status, trends, ecosystem services, and restorability. Annual Review of Environment and Resources 30:39–74
Acknowledgements
We thank members of the Laboratory of Biodiversity Science at The University of Tokyo and the Center for Toki and Ecological Restoration at Niigata University for help with the field work. This study was in part financially supported by the GCOE program (Asian Conservation Ecology) from the Ministry of Education, Culture, Sports, Science and Technology of Japan, and by the JSPS KAKENHI (grant number 25292210).
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MT performed field surveys, analyzed the data and drafted the initial manuscript. RK and KS carried out part of the field surveys. TM conceived the study and participated in its design. MS and ME helped with data analysis and several manuscript drafts. All authors have read and approved the final manuscript.
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Miyu, T.R., Evans, M.J., Soga, M. et al. Modern Farming Practices in Paddy Fields Negatively Affect an Endemic Frog, Glandirana susurra, in Japan. Wetlands 40, 1607–1615 (2020). https://doi.org/10.1007/s13157-020-01289-2
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DOI: https://doi.org/10.1007/s13157-020-01289-2