Pub Date : 2020-08-28DOI: 10.17265/2161-6256/2020.04.004
Benitez Hernández Solange Viviana, Aragón Rojas Stephania, Novoa Sindy, Madrigal Sandra, Núñez Paula, Montenegro Monica Gómez Paola, O. Elizabeth, L. Graciela, S. Ligia
{"title":"Evaluation of a Fermented Millet Product of Bacillus subtilis ATCC 55033 as Potential in Biocontrol of Bacteriosis (Xanthomonas axonopodis) in Gulupa (Passiflora edulis Sims)","authors":"Benitez Hernández Solange Viviana, Aragón Rojas Stephania, Novoa Sindy, Madrigal Sandra, Núñez Paula, Montenegro Monica Gómez Paola, O. Elizabeth, L. Graciela, S. Ligia","doi":"10.17265/2161-6256/2020.04.004","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.04.004","url":null,"abstract":"","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83418278","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}
Pub Date : 2020-08-28DOI: 10.17265/2161-6256/2020.04.001
J. Ferrell, Ok-Youn Yu, Heiyoung Kim
Biomass energy generated from livestock manure, other agricultural by-products and food waste can be an affordable greenhouse-heating energy source for those seeking lower energy costs. Appalachian State University, North Carolina (NC), USA, has built a 6.1 m × 9.1 m greenhouse, called the “Nexus” to test the integrated sustainable energy heating system for growing season extension with less energy cost. This is done by using on-farm biomass resources/wastes such as agricultural waste and wood chips to produce energy coupled with solar water heating to store and supplement required thermal inputs. Growing season extension with heated greenhouses increases the availability of local food throughout the year, expands available markets and increases farmers’ profits. Nexus includes an above ground 5,680-L water storage tank and an aquaculture pond. It is supported by a small-scale pyrolysis system, an anaerobic digestion system, solar thermal and compost heating. The preliminary result showed that compared to a conventional space heating system, about 30% of energy was saved to keep the greenhouse temperature available for growing by radiation from the water storage tank. The main purpose of this study was to test the proposed greenhouse heating systems developed at Nexus by implementing pilot systems on two local farms. Pyrolysis and solar thermal system in conjunction with heat storage and delivery system for each farm were built and tested in order to demonstrate how to reduce greenhouse energy use. This paper describes the results of the case study, which showed significant energy savings that can promote the resource-limited farmers’ interest.
从牲畜粪便、其他农业副产品和食物垃圾中产生的生物质能，对于那些寻求降低能源成本的人来说，可以成为一种负担得起的温室加热能源。美国北卡罗莱纳州(NC)的阿巴拉契亚州立大学(Appalachian State University)建造了一个6.1米× 9.1米的温室，名为“Nexus”，以测试综合可持续能源供暖系统，以更低的能源成本延长生长期。这是通过利用农场生物质资源/废物(如农业废物和木屑)产生能源，再加上太阳能热水来储存和补充所需的热输入来实现的。通过加热温室延长生长季节，增加了全年当地食品的供应，扩大了可用市场，增加了农民的利润。Nexus包括一个5680升的地上储水箱和一个水产养殖池。它由一个小型热解系统、一个厌氧消化系统、太阳能热和堆肥加热系统支持。初步结果表明，与传统的空间供暖系统相比，通过储水箱的辐射可以节省约30%的能源，以保持温室温度适合生长。这项研究的主要目的是通过在两个当地农场实施试点系统来测试Nexus开发的温室加热系统。为演示如何减少温室能源的使用，在每个农场建立并测试了热解和太阳能热系统以及储热和输送系统。本文描述了案例研究的结果，表明显著的能源节约可以促进资源有限的农民的利益。
{"title":"Case Study: Promoting Sustainable Energy Greenhouse Heating Systems to Small-Scale Local Farms","authors":"J. Ferrell, Ok-Youn Yu, Heiyoung Kim","doi":"10.17265/2161-6256/2020.04.001","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.04.001","url":null,"abstract":"Biomass energy generated from livestock manure, other agricultural by-products and food waste can be an affordable greenhouse-heating energy source for those seeking lower energy costs. Appalachian State University, North Carolina (NC), USA, has built a 6.1 m × 9.1 m greenhouse, called the “Nexus” to test the integrated sustainable energy heating system for growing season extension with less energy cost. This is done by using on-farm biomass resources/wastes such as agricultural waste and wood chips to produce energy coupled with solar water heating to store and supplement required thermal inputs. Growing season extension with heated greenhouses increases the availability of local food throughout the year, expands available markets and increases farmers’ profits. Nexus includes an above ground 5,680-L water storage tank and an aquaculture pond. It is supported by a small-scale pyrolysis system, an anaerobic digestion system, solar thermal and compost heating. The preliminary result showed that compared to a conventional space heating system, about 30% of energy was saved to keep the greenhouse temperature available for growing by radiation from the water storage tank. The main purpose of this study was to test the proposed greenhouse heating systems developed at Nexus by implementing pilot systems on two local farms. Pyrolysis and solar thermal system in conjunction with heat storage and delivery system for each farm were built and tested in order to demonstrate how to reduce greenhouse energy use. This paper describes the results of the case study, which showed significant energy savings that can promote the resource-limited farmers’ interest.","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74434658","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}
Pub Date : 2020-08-28DOI: 10.17265/2161-6256/2020.04.006
M. A. M. Kramadibrata, W. Sugandi, A. Yusuf, D. R. Kendarto
{"title":"Application of Symmetric Ploughs for Tillage on Wetland Paddy Fields","authors":"M. A. M. Kramadibrata, W. Sugandi, A. Yusuf, D. R. Kendarto","doi":"10.17265/2161-6256/2020.04.006","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.04.006","url":null,"abstract":"","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81807947","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}
Pub Date : 2020-08-28DOI: 10.17265/2161-6256/2020.04.003
Sampson Alai Koi Binyason, Simon Demaya Baka, P. W. Marchelo, Jebedayo Simon Duku, B. A. Ogwaro
{"title":"The Discovery of a Green Wood Beetle Diastocera trifasciata (Coleoptera: Lamiinae) on Mango Tree in South Sudan","authors":"Sampson Alai Koi Binyason, Simon Demaya Baka, P. W. Marchelo, Jebedayo Simon Duku, B. A. Ogwaro","doi":"10.17265/2161-6256/2020.04.003","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.04.003","url":null,"abstract":"","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74749873","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}
Pub Date : 2020-08-28DOI: 10.17265/2161-6256/2020.04.005
M. Kasprowicz-Potocka, A. Zaworska-Zakrzewska, A. Rutkowski
{"title":"Effect of Phytase on Digestibility and Performance of Growing and Finishing Pigs Fed Diets with Lupins and Rapeseed Meal","authors":"M. Kasprowicz-Potocka, A. Zaworska-Zakrzewska, A. Rutkowski","doi":"10.17265/2161-6256/2020.04.005","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.04.005","url":null,"abstract":"","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90864014","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}
Pub Date : 2020-08-28DOI: 10.17265/2161-6256/2020.04.002
E. Diouf, A. Coly
{"title":"Integrated Water Resources Management in the Sandougou Catchment Area (Senegal): Going beyond Soil Defence and Restoration (SDR)","authors":"E. Diouf, A. Coly","doi":"10.17265/2161-6256/2020.04.002","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.04.002","url":null,"abstract":"","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77176235","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}
Pub Date : 2020-04-28DOI: 10.17265/2161-6256/2020.02.002
Ahmed M. Elgharib, Fatima Al-Khulaifi
The scientific program of the Qur’anic Botanic Garden (QBG) is concerning with agricultural, conservational, biotechnology and medicinal fields. The QBG not only focusing on the study of the plants mentioned in the Holy Qur’an and Hadith, but also the endogenous plants of the Flora of Qatar and potential medicinal plants of the Arabic world. In the Hadith, the Prophet’s sayings, there are more than 20 plants mentioned in the occasions of cosmetic or medicinal uses. The garden is conserving special kinds of plants collected from different parts of the world to be restored at one place for preservation and study purposes. Both ex-situ and in-situ conservational programs are designed to collect and conserve plants inside and outside their natural habitats. The QBG plant nursery, herbarium, and seeds units are main components of the QBG that build to produce and preserve the plants at QBG. More than 59 plant spices are preserved from three different geographical zones: desert, Mediterranean and tropical zones. The Garden also is collecting and preserving those traditional entities from the entire world in order to be exhibited in the Botanic Museum of the QBG. By following the Islamic principles of conservation, the QBG highlights these conservational ethics and explains them for all people. Garden emphasizes multi-activities, campaigns, events, fairs and exhibitions for the students and public in order to encourage people to preserve the natural resources through an ordinately oriented educational program which is based on plant conservation. Another side of QBG’s conservation roles is the conservation based on community engagement and education. QBG’s education programs, horticulture and conservation programs, dissemination activities, and partnerships are fundamental in ensuring the transfer of this knowledge to the global community.
{"title":"The Conservational Role of Qur’anic Botanic Garden of Medicinal, Desert and Tropical Plants in Qatar","authors":"Ahmed M. Elgharib, Fatima Al-Khulaifi","doi":"10.17265/2161-6256/2020.02.002","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.02.002","url":null,"abstract":"The scientific program of the Qur’anic Botanic Garden (QBG) is concerning with agricultural, conservational, biotechnology and medicinal fields. The QBG not only focusing on the study of the plants mentioned in the Holy Qur’an and Hadith, but also the endogenous plants of the Flora of Qatar and potential medicinal plants of the Arabic world. In the Hadith, the Prophet’s sayings, there are more than 20 plants mentioned in the occasions of cosmetic or medicinal uses. The garden is conserving special kinds of plants collected from different parts of the world to be restored at one place for preservation and study purposes. Both ex-situ and in-situ conservational programs are designed to collect and conserve plants inside and outside their natural habitats. The QBG plant nursery, herbarium, and seeds units are main components of the QBG that build to produce and preserve the plants at QBG. More than 59 plant spices are preserved from three different geographical zones: desert, Mediterranean and tropical zones. The Garden also is collecting and preserving those traditional entities from the entire world in order to be exhibited in the Botanic Museum of the QBG. By following the Islamic principles of conservation, the QBG highlights these conservational ethics and explains them for all people. Garden emphasizes multi-activities, campaigns, events, fairs and exhibitions for the students and public in order to encourage people to preserve the natural resources through an ordinately oriented educational program which is based on plant conservation. Another side of QBG’s conservation roles is the conservation based on community engagement and education. QBG’s education programs, horticulture and conservation programs, dissemination activities, and partnerships are fundamental in ensuring the transfer of this knowledge to the global community.","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74093514","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}
Pub Date : 2020-04-28DOI: 10.17265/2161-6256/2020.02.004
I. Bahelka, O. Bučko, R. Stupka, M. Šprysl, J. Čítek
Forty-two (42) finishing pigs (entire males—EM, surgical castrates—SC and gilts—G, each of 14)—progeny of Landrace sows and Hampshire × Pietrain boars, were included in the trial. They were randomly divided into control and experimental groups (each of seven). Control groups were fed the standard diet without any supplement. Experimental groups received standard diet with the same composition as control but with supplement of creatine monohydrate (CMH, 2.0 g/kg of feed) for 30 d prior to slaughter. Sex of pigs had significant effect (p < 0.05) on drip loss and tenderness of pork when EM showed higher drip loss than SC and lower tenderness compared to other two groups (4.71% vs. 3.80%, resp. 3.23 vs. 3.91 and 4.12). Creatine level in plasma was increased by CMH supplementation in 46% in EM, 43% in SC and 41% in G. Similarly, concentration of phosphocreatine (PCr) in muscle increased in 84% in EM, 88% in SC and 83% in G, respectively. CMH also improved meat colour L (50.03 vs. 48.88) and reduced drip loss in both EM (5.24% vs. 4.18%) and G (4.48% vs. 3.60%). Higher tenderness and better oxidative stability of pork after CMH supplementation was found in all three sexes.
{"title":"Effects of Creatine Monohydrate Diet on Muscle Metabolism, Quality, Sensory and Oxidative Stability of Pork in Female, Entire and Castrated Male Pigs","authors":"I. Bahelka, O. Bučko, R. Stupka, M. Šprysl, J. Čítek","doi":"10.17265/2161-6256/2020.02.004","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.02.004","url":null,"abstract":"Forty-two (42) finishing pigs (entire males—EM, surgical castrates—SC and gilts—G, each of 14)—progeny of Landrace sows and Hampshire × Pietrain boars, were included in the trial. They were randomly divided into control and experimental groups (each of seven). Control groups were fed the standard diet without any supplement. Experimental groups received standard diet with the same composition as control but with supplement of creatine monohydrate (CMH, 2.0 g/kg of feed) for 30 d prior to slaughter. Sex of pigs had significant effect (p < 0.05) on drip loss and tenderness of pork when EM showed higher drip loss than SC and lower tenderness compared to other two groups (4.71% vs. 3.80%, resp. 3.23 vs. 3.91 and 4.12). Creatine level in plasma was increased by CMH supplementation in 46% in EM, 43% in SC and 41% in G. Similarly, concentration of phosphocreatine (PCr) in muscle increased in 84% in EM, 88% in SC and 83% in G, respectively. CMH also improved meat colour L (50.03 vs. 48.88) and reduced drip loss in both EM (5.24% vs. 4.18%) and G (4.48% vs. 3.60%). Higher tenderness and better oxidative stability of pork after CMH supplementation was found in all three sexes.","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76354047","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}
Pub Date : 2020-02-28DOI: 10.17265/2161-6256/2020.01.001
Felimon Brazas, Liwayway Perlado Taglinao, A. G. M. Revilla, R. Javier, E. Tadiosa
The present study was conducted primarily, to determine the diversity of basidiomycetous fungi and their taxonomy, in the northeastern side of Quezon Protected Landscape, bordering the municipalities of Pagbilao, Padre Burgos and Atimonan in Quezon province, Southern Philippines. Ten quadrats measuring 10 m × 15 m with an interval of 50 m were established from a transect line set up from the baseline to the peak of the landscape. Species of basidiomycetous fungi were pre-identified in the field. Substratum, form, texture, size, color and other noteworthy characteristics were recorded during the time of collection. Confirmation of identities was done using published textbooks, literature and consultation with mycology expert. A total of 863 individuals of basidiomycetous fungi were collected and identified belonging to 19 different families, 31 genera and 53 species. Polyporaceae family has the highest number of species representing 30% of the total number of individuals documented. Most of the species belong to Hexagonia and Polyporus genera. The current research revealed that most of the substrates used by these fungal organisms are woody substrate, specifically rotten woods. The results of Shannon-Wiener diversity index showed that the area has a high basidiomycetous fungal diversity. There was also a high species richness of these fungal organisms, but there was a low dominance and the species were not evenly distributed in the area. As this area is open for hikers, it is recommended that a continuous monitoring of the macrofungi community be done for sustainability and conservation.
本研究主要是在菲律宾南部奎松省与Pagbilao, Padre Burgos和Atimonan市接壤的奎松保护景观东北侧进行的，以确定担子菌真菌的多样性及其分类。从基线到景观顶峰的样线建立10 m × 15 m的10个样方，间隔50 m。对担子菌属真菌进行了野外预鉴定。采集时记录基质、形态、质地、大小、颜色等值得注意的特征。身份确认使用出版的教科书，文献和咨询真菌学专家。共收集到担子菌属真菌863株，隶属于19科31属53种。水螅科的种类最多，占记录的总个体数的30%。大多数种类属于六角属和水螅属。目前的研究表明，这些真菌生物利用的基质大多是木质基质，特别是腐烂的木材。Shannon-Wiener多样性指数表明，该地区担子菌真菌多样性较高。真菌种类丰富度较高，但优势度较低，分布不均匀。由于该地区对徒步旅行者开放，建议对大型真菌群落进行持续监测，以实现可持续性和保护。
{"title":"Diversity and Taxonomy of Basidiomycetous Fungi at the Northeastern Side of Quezon Protected Landscape, Southern Luzon, Philippines","authors":"Felimon Brazas, Liwayway Perlado Taglinao, A. G. M. Revilla, R. Javier, E. Tadiosa","doi":"10.17265/2161-6256/2020.01.001","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.01.001","url":null,"abstract":"The present study was conducted primarily, to determine the diversity of basidiomycetous fungi and their taxonomy, in the northeastern side of Quezon Protected Landscape, bordering the municipalities of Pagbilao, Padre Burgos and Atimonan in Quezon province, Southern Philippines. Ten quadrats measuring 10 m × 15 m with an interval of 50 m were established from a transect line set up from the baseline to the peak of the landscape. Species of basidiomycetous fungi were pre-identified in the field. Substratum, form, texture, size, color and other noteworthy characteristics were recorded during the time of collection. Confirmation of identities was done using published textbooks, literature and consultation with mycology expert. A total of 863 individuals of basidiomycetous fungi were collected and identified belonging to 19 different families, 31 genera and 53 species. Polyporaceae family has the highest number of species representing 30% of the total number of individuals documented. Most of the species belong to Hexagonia and Polyporus genera. The current research revealed that most of the substrates used by these fungal organisms are woody substrate, specifically rotten woods. The results of Shannon-Wiener diversity index showed that the area has a high basidiomycetous fungal diversity. There was also a high species richness of these fungal organisms, but there was a low dominance and the species were not evenly distributed in the area. As this area is open for hikers, it is recommended that a continuous monitoring of the macrofungi community be done for sustainability and conservation.","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81595004","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}
Pub Date : 2020-02-28DOI: 10.17265/2161-6256/2020.01.002
Earl Sunday Niya Perez, Majella G. Bautista
Dragonflies are well-known group of insects because of their biological and ecological importance in a community, that is, they indicate the environmental health of an ecosystem. However, in an urban ecosystem, there are many threats that can affect the assemblages of dragonfly species such as the intensification of urbanization which contributes biodiversity loss of most dragonfly species. This study aimed to identify dragonfly species and determine the species richness, relative abundance, species diversity, evenness and effective number of dragonflies in selected areas in Davao City. Opportunistic sampling using sweep net and photo documentation were used during the study. The sampling lasted for three months from June 2017 to August 2017. A total of 962 individuals of dragonflies were observed and recorded comprising of six species of dragonflies from six different genera of one family. Orthethrum sabina was the most abundant among the six species recorded in all sampling sites. The species richness was six. Low species diversity was obtained in all sampling which shows that the sites were not evenly distributed and indicating that the study sites were not diverse in terms of the number of species and highly disturbed.
{"title":"Dragonflies in the City: Diversity of Odonates in Urban Davao, Philippines","authors":"Earl Sunday Niya Perez, Majella G. Bautista","doi":"10.17265/2161-6256/2020.01.002","DOIUrl":"https://doi.org/10.17265/2161-6256/2020.01.002","url":null,"abstract":"Dragonflies are well-known group of insects because of their biological and ecological importance in a community, that is, they indicate the environmental health of an ecosystem. However, in an urban ecosystem, there are many threats that can affect the assemblages of dragonfly species such as the intensification of urbanization which contributes biodiversity loss of most dragonfly species. This study aimed to identify dragonfly species and determine the species richness, relative abundance, species diversity, evenness and effective number of dragonflies in selected areas in Davao City. Opportunistic sampling using sweep net and photo documentation were used during the study. The sampling lasted for three months from June 2017 to August 2017. A total of 962 individuals of dragonflies were observed and recorded comprising of six species of dragonflies from six different genera of one family. Orthethrum sabina was the most abundant among the six species recorded in all sampling sites. The species richness was six. Low species diversity was obtained in all sampling which shows that the sites were not evenly distributed and indicating that the study sites were not diverse in terms of the number of species and highly disturbed.","PeriodicalId":14977,"journal":{"name":"Journal of agricultural science & technology A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86006581","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}
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