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Evaluation of ecological risk analysis for benthic macroinvertebrates in paddy fields in the Meriç–Ergene River Basin (Turkish Thrace)

100%

Aydın G. B. , Çamur-Elipek B.

Oceanological and Hydrobiological Studies

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2022

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tom Vol. 51, No. 2

213--223

EN

Benthic macroinvertebrates are very important components of aquatic environments, and monitoring their population dynamics helps us understand the effects of environmental factors on ecosystems. This study aimed to determine the dynamics of benthic macroinvertebrate fauna in paddy fields in the Meriç–Ergene River Basin (Turkish Thrace region) by investigating some physicochemical environmental parameters that may affect its distribution. For this purpose, water and sediment samples were collected from paddy fields in the study area during the cultivation season, including spring, summer and autumn of 2016, taking into account the water resources that supply the rice fields (artesian water, the Meriç River, the Ergene River and Meriç–Ergene mixed water). A total of 47 taxa (on average 8953 individuals per m2) were identified at the study sites. Water samples were analyzed to determine water temperature, pH, conductivity, salinity, total dissolved solids, calcium, magnesium, total hardness, nitrite nitrogen, nitrate nitrogen, phosphate, sulfate, dissolved oxygen and pesticides, and sediment samples were analyzed to determine the content of some heavy metals, including Cd, Ni, Cu, and Mn. The biological risk index (mERM-Q) and the potential ecological risk index (RI) were applied to the data and a hypothetical ecological risk analysis was conducted using our data and data available in the literature to assess the ecological risk profile of the ecosystem based on benthic macroinvertebrates. To this end, environmental factors were grouped based on the literature as heavy metals (S1), nutrients (S2), other physicochemical parameters (S3) and pesticides (S4), while organisms were grouped as Oligochaeta, Chironomidae, Insecta and others based on the dynamics of benthic macroinvertebrates to assess pressure factors. As a result, pesticides (S4) were found to exert the strongest ecological pressure on benthic macroinvertebrate fauna in paddy fields in the Meriç-Ergene River Basin.

2

Cellular Automata Markov Method, an Approach for Rice Self-Sufficiency Projection

75%

Sutrisno D. , Ambarwulan W. , Nahib I. , Turmudi , Suryanta J. , Windiastuti R. , Kardono P.

Journal of Ecological Engineering

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2019

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tom Vol. 20, nr 6

117--125

EN

This article discusses the ability of the Cellular Automata (CA) Markov method to project rice sufficiency by considering the conversion of massive rice fields, such as the ones in Indonesia. The conversion of rice fields into land use for non-farming due to the rapidly growing population, industry and economic needs is increasingly affecting the rice self-sufficiency. With the development of remote sensing techniques, such as CA Markov, which has been used for years in spatial change projection, there is a need to assess the rice field conversion and its impact on the rice field self-sufficiency. The process is not solely based on CA Markov but also includes an object-based classification method utilising multi-temporal spot image data to derive land use maps, CA Markov for rice field conversion projection and rice self-sufficiency assessment, which was developed by assessing the availability of rice, consumption and production. Using the Indramayu district as the study area, the results indicate that within the next 20 years, the rice field area will decrease, and the impact on rice self-sufficiency will be 5.34 for Business as usual (BAU) and 0.47 when considering population growth. The previous research validated the results and indicated the efficiency of this method for rice self-sufficiency projection. Moreover, a management assessment was also conducted and indicated that in order to maintain rice self-sufficiency, innovation in the planting and seed systems as well as in farmers’ welfare management, such as incentives and subsidies, local food diversification systems and innovative food technique development to support food diversification, should be considered.

3

The vegetation of rice fields in North Korea and its relation to South Korea and Japan

75%

Kolbek J. , Dostalek J. , Jarolimek I.

Fragmenta Floristica et Geobotanica

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1996

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tom 41

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nr 2

4

Effects of ultraviolet, monochromatic and PAR waveband on nitrate reductase activity and pigmentation in a rice field cyanobacterium, Anabaena sp.

75%

Sinha R. P. , Krywult M. , Hader D. P.

Acta Hydrobiologica

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1998

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tom 40

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nr 2

5

Contribution to the knowledge of darkling beetles (Coleoptera: Tenebrionidae) from Iranian rice fields and surrounding grasslands

63%

Ghahari H. , Bunalski M. , Tabari M. , Ostovan H.

Polish Journal of Entomology

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2010

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tom 79

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nr 1

EN

Darkling beetles (Coleoptera: Tenebrionidae) are one of the most numerous and diverse family of beetles, present in almost all agroecosystems. The fauna of these beneficial insects in chain foods of ecosystems was studied in Iranian rice fields and surrounding grasslands. The results show a total of 21 tenebrionid species of 16 genera including, Zophosis LATREILLE, Dailognatha ESCHSCHOLTZ, Tentyria LATREILLE, Eutagenia REITTER, Phymatiotris SOLIER, Pachyscelis SOLIER, Pimelia FABRICIUS, Dendarus DEJEAN, Colpotus MULSANT et REY, Gonocephalum SOLIER, Opatroides BRULLÉ, Blaps FABRICIUS, Cephalostenus SOLIER, Probaticus SEIDLITZ, Euboeus BOIELDIEU and Tribolium MACLEAY. Altogether, members of 3 subfamilies (Pimeliinae, Opatrinae, Tenebrioninae) were collected from Iranian rice fields and surrounding grasslands. Four genera and 14 species are new records for Iran.

6

Immatures of Chironomidae (Insecta - Diptera) under the action of pesticides in irrigated rice field

63%

Marchiori A. , Baumart J. , Santos S.

International Journal of Ecohydrology and Hydrobiology

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2012

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tom 12

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nr 1

7

Providing of resource saving in Danube rice irrigation systems based on reuse of drainage water and wastewater

63%

Rokochynskiy A. , Turcheniuk V. , Volk P. , Prykhodko N. , Frolenkova N.

Acta Scientiarum Polonorum. Architectura

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2020

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tom 19

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nr 1

8

Occurrence and distribution of nematodes in rice fields in Guilan province, Iran and the first record of Mylonchulus polonicus (Stefanski, 1915) Cobb, 1917 (Nematoda: Mononchina)

51%

Shahabi S. , Kheiri A. , Rakhshandehroo F. , Jamali S.

Journal of Plant Protection Research

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2016

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tom 56

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nr 4

EN

The distribution of nematodes was studied in rice fields in Guilan province, Iran, from 2014 to 2016. Nematode biodiversity of 250 soil and root samples was examined. Thirty nematode species were identified morphologically, including plant parasites, microbivores and mycetophagous and predator species. Molecular techniques were also used for further identification of three plant parasitic species. Indicators of population were also estimated. Spiral nematodes (Helicotylenchus crenacauda Sher, 1966 and H. digitiformis Ivanova, 1967) and stunt nematode (Tylenchorhynchus agri) were the predominant parasitic species identified. Among other species, three mononchid species were identified namely Mononchus aquaticus, Mylonchulus sigmaturus and M. polonicus. The species M. polonicus was found and reported in Iran for the first time. The two plant parasitic species T. agri and Xiphinema index were reported in association with rice in Iran for the first time. To evaluate the distribution and incidence of Aphelenchoides besseyi (rice white-tip nematode) in different regions of Guilan province, a total of 255 fresh seed samples were collected/inspected, of which, about 40% of them were infested with A. besseyi. Of the 16 studied counties, the highest percentage of infected seeds came from fields around the city of Astara (69.2%) and the second highest infection was observed near the city of Anzali (60%).