Our Nature最新文献_第6页

Investigation on impacts of artisanal refining of crude oil on river bed sediments 人工精炼原油对河床沉积物影响的研究

Our Nature Pub Date : 2017-12-25 DOI: 10.3126/ON.V15I1-2.18792

I. C. Howard, O. D. Azuatola, I. Abiodun

{"title":"Investigation on impacts of artisanal refining of crude oil on river bed sediments","authors":"I. C. Howard, O. D. Azuatola, I. Abiodun","doi":"10.3126/ON.V15I1-2.18792","DOIUrl":"https://doi.org/10.3126/ON.V15I1-2.18792","url":null,"abstract":"The impact of artisanal refining of crude oil on the river bed sediments of the study area was investigated by assessing some quality properties. The result showed some consistency across the stations of the study area; however there were some differences between the values of the test stations and control station indicating some level of impacts on the quality of the sediments. The mean values of the test stations are pH 3.3±0.7, E. conductivity -10.2±3.7 mS/cm, Salinity 19.0±4.0‰, PO43- 401.8±67.0 mg/kg, SO42- 279.8±52.8 mg/kg, NO3- 58.0±22.9 mg/kg, SO2 215±100.2 mg/kg, Cl- 97.4±89.8 mg/kg, TOM 45.6±51.4%, K+ 1.054±0.3 meq/100g, Na+ 6.385±2.5 meq/100g and Ca2+ 0.756±0.6 meq/100g while that of the control values are 4.15±0.55, 11.0±0.0, 12.2±0.6, 428.25±12.75, 294.9±8.2, 76.8±15.2, 148.75±23.75, 126±99, 20. 9±4.1, 0.798±0.34, 5.639±1.383 and 0.261±0.128, respectively. The result indicated that the said activities affected the pH, PO43-, SO42-, NO3-, Cl- etc. of the study area; as these values were consistently lower than that of the control station. Again some of the quality properties were higher or lower than those of the control station and some related studies within and outside the region of the study area indicating some impacts which could be mostly anthropogenic. These impacts if not checked and the make–shift refining of the crude oil stopped by the appropriate regulatory bodies could have some adverse effects on the aquatic life quality of the ecosystem.","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"27 1","pages":"34-43"},"PeriodicalIF":0.0,"publicationDate":"2017-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78220084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Algal flora of Rajarani Lake, Dhankuta and their seasonal distribution 丹库塔拉贾拉尼湖藻类区系及其季节分布

Our Nature Pub Date : 2017-12-25 DOI: 10.3126/ON.V15I1-2.18793

G. Shrestha, S. Rai

{"title":"Algal flora of Rajarani Lake, Dhankuta and their seasonal distribution","authors":"G. Shrestha, S. Rai","doi":"10.3126/ON.V15I1-2.18793","DOIUrl":"https://doi.org/10.3126/ON.V15I1-2.18793","url":null,"abstract":"In this paper, a total 46 algae belonging to 34 genera and 3 classes (Chlorophyceae 54%, Bacillariophyceae 28%, Cyanophyceae 18%) have been reported from Rajarani Lake, Dhankuta, Nepal. Among these, 13 algae were reported as new to the country. Genera Ankistrodesmus , Closterium, and Desmodesmus had maximum number of species whereas 25 genera were represented by single species. Seasonal variation of algae showed that there was changing number and type of algae with physicochemical parameters in different seasons. Cyanophycean algae Microcystis flos-aque was dominant and observed in all sites in every collection of winter, summer and rainy seasons, and followed by bacillariophyceaean algae i.e., Aulacoseira granulata var . angustissima . The maximum number of algae was found in summer (59%) followed by winter (50%) and rainy (31%) seasons. There were 6 common algae found in all season’s viz . Ankistrodesmus falcatus, Aulacoseira granulata var . angustissima, Flagilaria tenera, Microcystis flos-aquae, Navicula radiosa and Oedogonium sp. Algae viz ., Anabaena affinis, Cyclotella meneghiana, Pinnularia divergens, Pinnularia interrupta, Tetrastrum heteracanthum, and Ulothrix subtilissima were found only in winter season whereas, Aulacoseirsa granulata var . muzzanensis, Bolbochaete sp, Closterium striolatum, Cylindrospermum muscicola, Desmodesmus abundans, Desmodesmous quadricauda var.bicaudatus, Eunotia bilunaris, Gomphonema lacusrankaloides and Gomphonema pseudoaugur were observed only in summer. Similarly, Aphanocapsa pulchra, Oscillatoria sancta and Pediastrum duplex var . gracillimum were reported only in rainy season.","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"48 1","pages":"44-54"},"PeriodicalIF":0.0,"publicationDate":"2017-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80969204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

On the Bayat (Turkey) rugs, motif stories, used dyeing plants and their ethnobotanical properties 关于巴亚特(土耳其)地毯，图案故事，染色用植物及其民族植物学特性

Our Nature Pub Date : 2017-12-25 DOI: 10.3126/ON.V15I1-2.18790

Ş. Arı, M. Kargioğlu, M. Konuk

{"title":"On the Bayat (Turkey) rugs, motif stories, used dyeing plants and their ethnobotanical properties","authors":"Ş. Arı, M. Kargioğlu, M. Konuk","doi":"10.3126/ON.V15I1-2.18790","DOIUrl":"https://doi.org/10.3126/ON.V15I1-2.18790","url":null,"abstract":"Bayat rugs weaved with different madders can be used without fading their colors almost 100 years. The study aimed to record how to get madder by traditional methods from local plants, give stories of rug motives and present an overview of the medicinal uses of dyes plants collected in Afyonkarahisar, Inner-West Anatolia, Turkey. The study was conducted in both 11 villages and downtown of Bayat borough of Afyonkarahisar in 2013-2014. A total 150 women, aged between 17-25, were interviewed and observations were photographed. The rugs are completely 100% sheep wool and strings for weaving prepared traditionally by special spinning methods. The used plants to obtain the madders were determined. It was understood that in early August and September, plants give better colors and tones. These plants have also been used for medicinal purposes by the locals. Bayat people get non-fading colors from 11 plants (Allium cepa L., Berberis crataegina L., Papaver rhoeas, Papaver somniferum L., Malva silvestris L., Morus nigra L., Cistus laurifolius L., Quercus ithaburensis Decne. subsp. macrolepis (Kotschy) Hedge et Yalt, Rubia tinctorum L., Juglans regia L., Indigofera tinctoria L.) belonged to ten families. The plant organs used are root, shell, cupula, leaf, young shoot, and aerial parts of the plants. A natural mud is also used as alum in this region that provides to create dark colors, and prevents mixing the colors. It also inhibits fading the colors in the rugs’ texture. It was also recorded that different motives in Bayat Rugs have also interesting historical stories.","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"7 1","pages":"19-25"},"PeriodicalIF":0.0,"publicationDate":"2017-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82208603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of environmental regulated water temperature variations on survival, growth performance and haematology of African catfish, Clarias gariepinus 环境调节水温变化对非洲鲶鱼生存、生长性能和血液学的影响

Our Nature Pub Date : 2017-12-25 DOI: 10.3126/ON.V15I1-2.18791

J. Ogunji, J. Awoke

{"title":"Effect of environmental regulated water temperature variations on survival, growth performance and haematology of African catfish, Clarias gariepinus","authors":"J. Ogunji, J. Awoke","doi":"10.3126/ON.V15I1-2.18791","DOIUrl":"https://doi.org/10.3126/ON.V15I1-2.18791","url":null,"abstract":"A 56 day study was carried out to evaluate effect of temperature changes on survival, growth performance and haematology of Clarias gariepinus fingerlings fed housefly maggot meal (magmeal) diet. Ninety (90) Clarias gariepinus fingerlings, (initial mean weight 4.33±0.03g) were subjected to different environmental regulated temperature conditions in three locations (laboratory, outdoor, greenhouse). The observed average temperature was 26.53±0.01°C, 26.06±0.01°C and 31.52±0.00°C for laboratory, outdoor, greenhouse, respectively. Ten fingerlings stocked per experimental tank were fed in triplicates at 5% body weight in two portions per day. It was observed that different water temperatures affected fish growth. All experimental fish in the greenhouse died after 8 days of exposure. This happened around 14.00 hrs when water temperature reached 40°C. There was no significant difference (P 0.05). The result confirms that Clarias gariepinus fingerlings reared at a mean temperature of 26°C (within the recorded optimal temperature range for good growth) performed well. Clarias gariepinus fingerlings are not able to survive when water temperature reaches to 40oC.","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"95 1","pages":"26-33"},"PeriodicalIF":0.0,"publicationDate":"2017-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87623899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Conflict due to Assamese Macaques (Macaca assamensis McClelland 1840) and crop protection strategies in Kali-gandaki River Basin, Western Nepal 尼泊尔西部Kali-gandaki河流域阿萨姆猕猴冲突与作物保护策略

Our Nature Pub Date : 2017-01-23 DOI: 10.3126/ON.V14I1.16449

P. K. Paudel

引用次数: 7

Effect of disturbance on litter dynamics in moist tropical forest of eastern Nepal 干扰对尼泊尔东部潮湿热带森林凋落物动态的影响

Our Nature Pub Date : 2017-01-23 DOI: 10.3126/ON.V14I1.16435

T. Gautam, T. Mandal

{"title":"Effect of disturbance on litter dynamics in moist tropical forest of eastern Nepal","authors":"T. Gautam, T. Mandal","doi":"10.3126/ON.V14I1.16435","DOIUrl":"https://doi.org/10.3126/ON.V14I1.16435","url":null,"abstract":"Litterfall is an important vector of nutrient and carbon recycling in forest ecosystems. Present study was conducted in moist tropical forest of eastern Nepal to understand the effect of disturbance on litter dynamics. Litterfall was estimated at monthly intervals from one litter trap (1 m × 1 m) at each of the 70 sampling plots while litter mass accumulated at each sampling plot was collected once every season from one 1 m × 1 m plot. The total annual litterfall in undisturbed forest (UF) was 11.8 Mg ha −1 yr −1 which decreased by 54.2% in disturbed forest (DF). Leaves accounted for 69% (UF) to 76% (DF) of total litterfall while non-leaf litter formed the rest. Seasonal pattern exhibited a concentrated litterfall in summer season during March to June when more than 70% litterfall occurred in both stands. Forest floor litter mass also decreased due to forest disturbance. The total input of nutrients to the soil through litterfall in UF was more than double as compared to DF. The nutrient stocks in litter mass were in the order: N > K > P in both stands. Key disturbance activities like lopping, litter removal, tree felling, grazing, fire etc. in the peripheral part of the forest should be strictly prohibited by imposing rules and regulations so that status of biodiversity would be restored. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License .","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"62 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2017-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83874045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Biomass composition of phytoplanktons in Mahakali River, Nepal 尼泊尔Mahakali河浮游植物生物量组成

Our Nature Pub Date : 2017-01-23 DOI: 10.3126/ON.V14I1.16450

V. K. Mahaseth

引用次数: 0

Distribution pattern and species richness of Liliaceae in the Nepal Himalaya 尼泊尔-喜马拉雅地区百合科植物分布格局及物种丰富度

Our Nature Pub Date : 2017-01-23 DOI: 10.3126/ON.V14I1.16437

Hum Kala Rana, S. Rana, S. K. Ghimire

引用次数: 2

Effect of altitudinal variation on the soil characteristics in sal (Shorea robusta gaertn.) forests of eastern Nepal 海拔变化对尼泊尔东部小檗林土壤特征的影响

Our Nature Pub Date : 2017-01-23 DOI: 10.3126/ON.V14I1.16438

K. Bhattarai, T. Mandal

{"title":"Effect of altitudinal variation on the soil characteristics in sal (Shorea robusta gaertn.) forests of eastern Nepal","authors":"K. Bhattarai, T. Mandal","doi":"10.3126/ON.V14I1.16438","DOIUrl":"https://doi.org/10.3126/ON.V14I1.16438","url":null,"abstract":"Physico-chemical properties of forest soil depends on a variety of natural factors, the most important are variation in altitude, vegetation cover and microbial activities. The present study was conducted to understand the effect of variation in altitude in the soil characteristics in Tarai Sal forest (TSF) and Hill Sal forest (HSF), of eastern Nepal. Soil samples were collected from thirty plots randomly in each forest from 0- 15cm and 15-30cm depths in May 2012. Both forests had sandy loam type of soil texture. However, the percentage composition of soil particles varies within the forest sites. Soil moisture was higher in TSF. It was maximum in the rainy season in both forests. Water holding capacity was slightly higher in TSF. Bulk density was higher in TSF and it increased with soil depth in both forests. The pH value was slightly higher in HSF than TSF however, the value increased in lower soil depth in both forest stands. In the upper soil layer (0-15cm) soil organic carbon (SOC) was higher in HSF (2.09%) than TSF (1.6%). Similarly, total nitrogen (TN) was also higher in HSF (0.173%) than in TSF (0.129%) while total phosphorus (TP) was more or less same in both forest stands. The potassium (K) a soil extractable nutrient also showed higher value in HSF (312.13 µg g -1 ) than TSF (238.47 µg g -1 ). The values of SOC, TN, TP and K decreased in lower depth (15-30cm) in both forest stands. In conclusion, variation in altitude causes difference in the microclimatic condition which resulted into the alternation in soil characteristics. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License .","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"61 1","pages":"30-38"},"PeriodicalIF":0.0,"publicationDate":"2017-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85178403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Early winter avifaunal diversity from Buxa Tiger Reserve and Rasikbeel Wetland Complex of northern part of West Bengal, India 印度西孟加拉邦北部Buxa老虎保护区和Rasikbeel湿地群的早冬鸟类多样性

Our Nature Pub Date : 2017-01-23 DOI: 10.3126/ON.V14I1.16439

Sagar Adhurya, Moitreyee Banerjee, A. Pal, U. Roy

引用次数: 1