List of Articles Shannon-Wiener

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Spatial and temporal assessment of weeds biodiversity in wheat agroecosystems of Bandar-e-Torkeman county, Golestan province
  Maral Neyazmoradi Hossein Kazemi Javid Gherekhloo Afshin Soltani Behnam Kamkar
  This research was conducted to study of diversity and weed population structure of wheat agroecosystems of Bandar-e-Torkeman county in 2018-2019 year. Diversity indices such as Shannon-Wiener and Simpson for fields and frequency, relative frequency, relative uniformity More

  This research was conducted to study of diversity and weed population structure of wheat agroecosystems of Bandar-e-Torkeman county in 2018-2019 year. Diversity indices such as Shannon-Wiener and Simpson for fields and frequency, relative frequency, relative uniformity and relative density indices for all weed species were calculated and measured in two time stages, before and after chemical treatment with herbicides. Obtained data from diversity indices were moved in the GIS media and weed species maps of wheat fields were prepared. In this study, we were identified 18 species from 9 plant families. The checking of plant species showed that 66.67% and 33.33% were belonged to annual and perennial, also, about 27.77% and 72.23% were narrow-leaved and broad-leaved, respectively. Gramineae species include Avena ludoviciana, Lolium temulentum, Phalaris minor, Alopecurus myosuroides and Polygon monspeliensis, Fabaceae species include Medicago scutellata, Polygonom avicular, Vicia villosa and Oxalis corniculata and Compositea species such as Helianthus annuus and Cirsium arvense, had about 27.77, 22.22 and 11.11 percent of the available plant species, that were recognized as the most important plant families in wheat fields of county, respectively. In this study, weed distribution maps in wheat fields of the county before and after chemical control were prepared in three frequency groups of 50-100, 30-50 and less than 30% and showed an almost uniform distribution of weeds in surveyed region. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - Determination of Population Indices and Distribution Map of Weeds in Rainfed Wheat Fields of Kermanshah Province
  Mozhgan Veisi Mahdi Minbashi Peyman Sabeti Abdolreza Mohammadi
  In order to identify and determine weeds distribution in rainfed wheat fields of Kermanshah province, 58 fields in 7 counties were investgated during 2001 and 2009. After weed survey the charsterictics of weed species were evaluated. Then density, frequency, uniformity, More

  In order to identify and determine weeds distribution in rainfed wheat fields of Kermanshah province, 58 fields in 7 counties were investgated during 2001 and 2009. After weed survey the charsterictics of weed species were evaluated. Then density, frequency, uniformity, mean density, abundance index, Shannon- Weaver diversity index and Simpson index were determined. In  rainfed wheat fields of Kermakshah province 91 weed species were identified out of which 15 species belong to grass weed and 53 species belong to broadleaf weed. Poaceae, Fabaceae, Asteraceae and  Rubiaceae were the most important families with, 57, 35.5, 34.6 and 18 percent of FIV, respectively. Based on the result of this study Galium tricornatum, Vicia hyrcanica, Vaccaria pyramidata and Anthemis cotula were the dominant broadleaved weeds. Avena ludoviciana, Hordeum spontaneum and Bromus tectorum were the most important grass weeds. In addition the most important troubeling preharvest weeds were Convolvulus arvensis, Carthamus oxyacanthus and Glycyrrhiza glabra in rainfed wheat  fields. Shannon-Weaver diversity index showed the highest species diversity were in Kermanshah with 2.67 and the lowest species diversity in Songhor and Sarpolezohab were with 1.8 and 1.9, respectively. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Weed Map Distribution of Chickpea (Cicer arietinum L.) Fields and Prediction of Their Presence in Agricultural Fields of Kermanshah Province with Using Geographic Information System (GIS)
  Younes Chalechale Mahdi Minbashi Moeini Amir Hossein Shirani Rad
  Recognizing the composition of weed community in chickpea field is the most fundamental issues in weed crop management. Based on chickpea acreage and overall field areas in Kermanshah province during 2009-2010, fifty-two farms were selected as indicators of chickpea fie More

  Recognizing the composition of weed community in chickpea field is the most fundamental issues in weed crop management. Based on chickpea acreage and overall field areas in Kermanshah province during 2009-2010, fifty-two farms were selected as indicators of chickpea fields in the province. The weeds in sampling points were counted based on overall plants and each species and their population indices were calculated. In each field, at sampling points, the longitudes, latitudes and altitudes were determined via GPS device. By using this information, the distribution maps of different weed species of chickpea fields in Kermanshah produced via GIS software. The results showed that there were sixty-one weed species in chickpea fields of Kermanshah province. The ranking of predominant broadleaf weeds of chickpea fields in Kermanshah were included of succory (Cichorium intybus), field bind weed (Convolvulus arvensis), bed straw (Galium tricornatum), wild safflower (Carthamus oxycantha) and cowcockie (Vaccaria pyramidata), of Kermanshah province, respectively. Dominant grasses of chickpea fields in Kermanshah province were included: wild barley (Hordeum spontaeum), spring wild oat (Avena fatua) and Bermuda grass (Cynodon dactylon), respectively. Based on Shannon-Wiener species diversity index, different cities were classified into three clusters. Being in low value for Simpson abundance index of some cities were similar to being low Shannon-Wiener index and were indicated the presence of non-uniform community with the presence of dominant species in chickpea fields of these cities. There were significant differences among of chickpea fields' weeds of different cities in regard to species diversity, only the difference between Kermanshah city and Dalaho and Ravansar cities was significant. The predictive maps of different species based on their soil and climatic requirements showed that shifting of these species toward area with similar ecological conditions are able to infest the area and should prevent weed infestation of new area. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Investigation on Syrphid flies (Dip., Syrphidae) in Arak region and comparison of their bio-diversity indices in sampling sites
  F. Khaki B. Gharali Sh. Goldasteh
  In order to investigate the fauna and bio-diversity indices of syrphid flies in Arak region, samples were taken from April to November 2012. The indices were calculated using the Shannone Wiener index. Totally 21 species belonging to two subfamilies, six tribes and 13 g More

  In order to investigate the fauna and bio-diversity indices of syrphid flies in Arak region, samples were taken from April to November 2012. The indices were calculated using the Shannone Wiener index. Totally 21 species belonging to two subfamilies, six tribes and 13 genera were identified. Results showed that the highest diversity was in the second week of October, fourth week of June and the first week of October. The least index was in the third week of June, August and November. Sphaerophoria rueppeli is the ecologic dominant species in Arak and neighboring regions. Manuscript profile