Effects of Water Management, Connectivity, and Surrounding Land use on Habitat use by Frogs in Rice Paddies in Japan

Naito, Risa; Yamasaki, Michimasa; lmanishi, Ayumi; Natuhara, Yosihiro; Morimoto, Yukihiro

doi:10.2108/zsj.29.577

Cited by 33 publications

(24 citation statements)

References 25 publications

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“…The few existing field studies have reported variable results. Naito et al (2012) showed no significant effects of agrochemicals on the abundance of several frog species, but dead frogs and fishes have often been observed after the application of insecticide and insecticide-fungicide mixtures (Minagawa, 2009). No data are available to test the effect of newer pesticides on the abundance or foraging success of waterbirds.…”

Section: Newer Pesticidesmentioning

confidence: 99%

“…The irrigation/drainage systems have broken up the connectivity of each landscape element; for example, the deep concrete-lined ditches act as a pitfall for frogs moving across the agricultural landscape (Watabe et al, 2010), reducing their regional abundance (e.g., Fujioka and Lane, 1997;Hasegawa, 1998; see also Table 2). An exception is the Japanese tree frog, a common species in Japan, which has not been negatively affected by the efficient irrigation systems (e.g., Tsuji et al, 2011;Naito et al, 2012). The tree frog can tolerate this environment because (1) it has sucker-bearing legs that enable it to climb up the concrete walls in the deep ditches (Fujioka and Lane, 1997) and (2) the efficient systems have reduced its predators, such as fishes and birds, compensating for any negative impact on eggs and larvae (Katayama et al, 2013).…”

Section: Efficient Irrigation/drainage Systemsmentioning

confidence: 99%

“…For high-trophiclevel species, the effectiveness of the reduced use of pesticides on their abundance seems to be less clear. For frogs, the effect of agrochemicals on abundance has not been significant (Naito et al, 2012). This may reflect their relatively low sensitivity to newer pesticides (see Section 3.2.2) or complex links among agrochemicals, life history, and frogs.…”

Section: Research On Conservation Management In Rice Fieldsmentioning

confidence: 99%

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A review of post-war changes in rice farming and biodiversity in Japan

Katayama

Baba

Kusumoto

et al. 2015

Agricultural Systems

149

100

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A B S T R A C TFlooded rice fields can provide habitats for wetland species and ecosystem services similar to those of natural wetlands. During the last three decades, however, farming practices and management systems have been intensified in many rice-producing countries. In addition, more recent socioeconomic changes have caused agricultural abandonment in some parts of East and Southeast Asian countries such as Japan. This study reviewed long-term statistics on rice farming, as well as the impact of agricultural intensification and abandonment on farmland biodiversity at multiple spatial scales in Japan. The impact of pesticide use was greatest in the 1950s-1970s, when the use of highly toxic agents had not yet been prohibited. More recently, different components of agricultural intensification have been the largest threat for various taxa, for example, chemical pesticides for aquatic plants and invertebrates and modern efficient irrigation/ drainage systems for amphibians, fishes, and waterbirds. The negative impacts of agricultural abandonment on farmland species have been rapidly increasing with the expansion of abandoned fields and the subsequent vegetation succession and loss of habitat heterogeneity. We also discuss the effectiveness of environmentally friendly farming practices, including the reduced use of pesticides, winter paddy flooding, and installation of fishways, to reduce the negative impacts of agricultural intensification on farmland species in rice-paddy landscapes.

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Section: Newer Pesticidesmentioning

confidence: 99%

Section: Efficient Irrigation/drainage Systemsmentioning

confidence: 99%

Section: Research On Conservation Management In Rice Fieldsmentioning

confidence: 99%

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A review of post-war changes in rice farming and biodiversity in Japan

Katayama

Baba

Kusumoto

et al. 2015

Agricultural Systems

149

100

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“…It is possible, but not proven that the over use of these agrochemicals and hormones may contribute to the development of CKD-mfo. In view of this, precautions and preventative actions need to be taken immediately to minimise the harm to farmers, fauna, flora, and the environment, and to protect consumers [95][96][97][98].…”

Section: Effects Of Harmful Agricultural and Irrigation Practicesmentioning

confidence: 99%

Escalating chronic kidney diseases of multi-factorial origin in Sri Lanka: causes, solutions, and recommendations

Wimalawansa

2014

Environ Health Prev Med

125

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During the last two decades, Sri Lanka, located close to the equator, has experienced an escalating incidence of chronic kidney disease (CKD) of unknown aetiology (CKDue) in dry zonal areas. Similar incidences of unusual CKDs have been reported in the dry zonal, agricultural areas of several other equatorial countries. In Sri Lanka, the incidence of CKDue is highest in the North Central Province (NCP), where approximately 45 % of the country's paddy fields are located. However, in recent years, the disease has spread into areas adjacent to as well as distant from the NCP. The cause of CKD in Sri Lanka is unknown, and may likely due to interactions of different potential agents; thus, CKD is of multi-factorial origin (CKD-mfo). These factors include, the negative effects from overuse of agrochemicals. Nevertheless, the potential interactions and synergism between probable agents have not been studied. This systematic review discusses the proposed hypotheses and causes of CKD-mfo in Sri Lanka, and ways to decrease the incidence of this disease and to eradicate it, and provide some recommendations. During the past decade, a number of groups have investigated this disorder using different methodologies and reported various correlations, but failed to find a cause. Research has focussed on the contamination of water with heavy metals, agrochemicals, hard water, algae, ionicity, climate change, and so forth. Nevertheless, the levels of any of the pollutants or conditions reported in water in NPC are inconsistent not correlated with the prevalence of the disease, and are too low to be the sole cause of CKD-mfo. Meanwhile, several nephrotoxins prevalent in the region, including medications, leptospirosis, toxic herbs, illicit alcohol, locally grown tobacco, and petrochemicals, as well as the effects of changed habits occured over the past four decades have not been studied to date. Taken together, the geographical distribution and overall findings indicate that combinations of factors and/or their interactions are likely to precipitate CKD-mfo, which kills more than 5,000 people annually in Sri Lanka; most victims are middleaged male farmers. Much anecdotal evidence from this region suggests that consumption of contaminated water is the most likely source of this deadly disease. Although the aetiology is unknown, prevention of this ''environmentally acquired'' disease seems relatively straightforward. Solutions include (a) preventing environmental pollution, (b) stopping the irresponsible use and decreasing the usage of agrochemicals, and encouraging the use of environmentally friendly agricultural methods, (c) taking proper precautions when using agrochemicals and safe disposal of their containers, (d) changing the risky behaviour of farmers and educating them to preserve the environment, and (e) providing clean potable water to all affected regions. Implementing a well-coordinated, in-depth, region-wide, broad-based research study together with a long-term effective surveillance programme across the country i...

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“…그러나 오랫동안 인간의 주거지에서 나타나는 일부의 양서류 는 경관 조성의 변화에 내성을 나타내기도 한다 (Hartel et al 2010). 도시화에 따른 어떤 구체적인 환경의 변화 가 양서류에 영향을 미치는지에 대하여 잘 알려져 있지 않다 (Naito et al 2012, Marsh et al 2017.…”

Section: 서 론unclassified

Comparison of Health Status of Japanese Tree Frog (Hyla Japonica) in a Rural and an Urban Area

Cho¹

2017

Ecology and Resilient Infrastructure

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Urbanization is a major driver of global amphibian declines. For the study on the effect of urbanization on amphibians, we compared the growth and the health status of Hyla japonica amphibians collected in the urban areas of Incheon and in the rural area of Gapyeong, Korea. The size and weight of Hyla japonica body in the urban area were smaller than those in the rural area. However, there was no significant difference in their condition factors as a health indicator between the two areas. Our study emphasizes the need for research into the specific mechanism of effects of urbanization on amphibian heath status for the further understanding of the relationship between urbanization and amphibians.

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Effects of Water Management, Connectivity, and Surrounding Land use on Habitat use by Frogs in Rice Paddies in Japan

Cited by 33 publications

References 25 publications

A review of post-war changes in rice farming and biodiversity in Japan

A review of post-war changes in rice farming and biodiversity in Japan

Escalating chronic kidney diseases of multi-factorial origin in Sri Lanka: causes, solutions, and recommendations

Comparison of Health Status of Japanese Tree Frog (Hyla Japonica) in a Rural and an Urban Area

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