Pub Date : 2020-10-01DOI: 10.1080/13887890.2020.1828194
G. Assandri, G. Bazzi, D. Maggioni, A. Galimberti, B. Kunz
Aquatic macroinvertebrates are a primary component of freshwater ecosystems and one of the most threatened by anthropogenic pressures. Among them, dragonflies are a charismatic group of growing scientific and social interest. However, little is known about the natural history of several species. One paradigmatic example is the declining Orthetrum nitidinerve, a Western Mediterranean endemic anisopteran. We reviewed published and new data on this species, addressing distribution, autecology, and conservation (with a focus on Italy), and provide its first genetic characterization and phylogenetic placement within the genus. In Italy, the species is known from 50 sites so far (only 17 breeding populations) located in Sardinia and Sicily (1841–2019, only 22 from 1990 onward). Records from continental Italy are due to misidentification. The flight period in Italy spans between May and September. Habitat consists of permanent freshwater (mostly helocrene sources, seepages, and small brooks), slow-flowing, shallow, with muddy bottom deposits at elevation from the sea level up to 1000 m asl. All the breeding populations are found in open and sunny landscapes, almost invariably in extensive pasturelands. The species has strongly declined in Sicily, whereas several large populations still occur in Sardinia. The major threats identified so far are agriculture and grazing intensification or abandonment and drought/source desiccation determined by water overexploitation and climate change. The first ever provided mitochondrial COI barcode and ITS nuclear sequences allowed a first tentative phylogenetic placement of the species as a sister group of the O. brunneum/O. lineostigma lineage.
水生大型无脊椎动物是淡水生态系统的主要组成部分，也是受人为压力威胁最大的物种之一。其中，蜻蜓是一个极具魅力的群体，具有日益增长的科学和社会兴趣。然而，人们对几个物种的自然历史知之甚少。一个典型的例子是衰落的Orthetrum nitidinerve，一种西地中海特有的异翅目昆虫。我们回顾了关于该物种的已发表和新数据，涉及分布、生态和保护（重点关注意大利），并提供了其在属内的首次遗传特征和系统发育位置。在意大利，迄今为止，该物种在撒丁岛和西西里岛的50个地点（只有17个繁殖种群）已知（1841年至2019年，1990年以后只有22个）。意大利大陆的记录是由于误认造成的。意大利的飞行期为5月至9月。栖息地由永久性淡水（主要是海洛林来源、渗漏和小溪）组成，流动缓慢，浅层，海拔高达1000米处有泥底沉积物 m asl。所有繁殖种群都分布在开阔、阳光充足的地方，几乎无一例外地分布在广阔的牧场上。该物种在西西里岛已大幅减少，而撒丁岛仍有几个大型种群。到目前为止，确定的主要威胁是农业和牧场的集约化或废弃以及由水资源过度开发和气候变化造成的干旱/水源枯竭。有史以来第一个提供的线粒体COI条形码和ITS核序列允许将该物种作为O.brunneum/O的姐妹群进行首次尝试性的系统发育定位。lineostigma谱系。
{"title":"Distribution, autecology, genetic characterization, and conservation of the Western Mediterranean endemic dragonfly Orthetrum nitidinerve (Selys, 1841): insights from Italy","authors":"G. Assandri, G. Bazzi, D. Maggioni, A. Galimberti, B. Kunz","doi":"10.1080/13887890.2020.1828194","DOIUrl":"https://doi.org/10.1080/13887890.2020.1828194","url":null,"abstract":"Aquatic macroinvertebrates are a primary component of freshwater ecosystems and one of the most threatened by anthropogenic pressures. Among them, dragonflies are a charismatic group of growing scientific and social interest. However, little is known about the natural history of several species. One paradigmatic example is the declining Orthetrum nitidinerve, a Western Mediterranean endemic anisopteran. We reviewed published and new data on this species, addressing distribution, autecology, and conservation (with a focus on Italy), and provide its first genetic characterization and phylogenetic placement within the genus. In Italy, the species is known from 50 sites so far (only 17 breeding populations) located in Sardinia and Sicily (1841–2019, only 22 from 1990 onward). Records from continental Italy are due to misidentification. The flight period in Italy spans between May and September. Habitat consists of permanent freshwater (mostly helocrene sources, seepages, and small brooks), slow-flowing, shallow, with muddy bottom deposits at elevation from the sea level up to 1000 m asl. All the breeding populations are found in open and sunny landscapes, almost invariably in extensive pasturelands. The species has strongly declined in Sicily, whereas several large populations still occur in Sardinia. The major threats identified so far are agriculture and grazing intensification or abandonment and drought/source desiccation determined by water overexploitation and climate change. The first ever provided mitochondrial COI barcode and ITS nuclear sequences allowed a first tentative phylogenetic placement of the species as a sister group of the O. brunneum/O. lineostigma lineage.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1828194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49468011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-30DOI: 10.1080/13887890.2020.1818639
R. B. Dubois
More than 400 scientific journal articles and gray literature reports that addressed macroinvertebrate drift were reviewed and 63 articles were found that reported on the natural drift of Odonata at some taxonomic level. Forty-three species and 44 genera within 15 families (nine Zygoptera; six Anisoptera) were documented in the drift. Drift of another 13 species and eight genera was inferred from indirect evidence. The mean drift density reported was 0.03 m–3 (range <0.001–0.153 m–3), which is relatively low, but not unexpected because benthic densities of Odonata are often lower than those of the macroinvertebrate taxa that occur more frequently in the drift. Percent composition of odonates in the total drift was invariably <10% and usually <1%, but the percent was slightly higher if expressed as biomass or volume because odonate larvae are relatively large. Most odonates that drifted were not full grown. High flows were often associated with drift of Odonata, but not exclusively so; drift was highest at night and during summer months. Accidental (catastrophic) drift and active, behavioral drift to colonize new habitats and reduce crowding are thought to be the primary causes of Odonata drift, but its ecological significance would benefit from more research. The presumption that Odonata have a low predisposition to drift is probably not uniformly accurate. Use of drift nets specifically to collect odonates is unlikely to be as efficient as other collection methods in most circumstances, but it should not be entirely dismissed because drift nets are easy to set, relatively clean to operate, do not destroy habitats, and provide integrated samples of various habitats where it might be difficult or unsafe to use other methods.
{"title":"Odonata drift: a reassessment","authors":"R. B. Dubois","doi":"10.1080/13887890.2020.1818639","DOIUrl":"https://doi.org/10.1080/13887890.2020.1818639","url":null,"abstract":"More than 400 scientific journal articles and gray literature reports that addressed macroinvertebrate drift were reviewed and 63 articles were found that reported on the natural drift of Odonata at some taxonomic level. Forty-three species and 44 genera within 15 families (nine Zygoptera; six Anisoptera) were documented in the drift. Drift of another 13 species and eight genera was inferred from indirect evidence. The mean drift density reported was 0.03 m–3 (range <0.001–0.153 m–3), which is relatively low, but not unexpected because benthic densities of Odonata are often lower than those of the macroinvertebrate taxa that occur more frequently in the drift. Percent composition of odonates in the total drift was invariably <10% and usually <1%, but the percent was slightly higher if expressed as biomass or volume because odonate larvae are relatively large. Most odonates that drifted were not full grown. High flows were often associated with drift of Odonata, but not exclusively so; drift was highest at night and during summer months. Accidental (catastrophic) drift and active, behavioral drift to colonize new habitats and reduce crowding are thought to be the primary causes of Odonata drift, but its ecological significance would benefit from more research. The presumption that Odonata have a low predisposition to drift is probably not uniformly accurate. Use of drift nets specifically to collect odonates is unlikely to be as efficient as other collection methods in most circumstances, but it should not be entirely dismissed because drift nets are easy to set, relatively clean to operate, do not destroy habitats, and provide integrated samples of various habitats where it might be difficult or unsafe to use other methods.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1818639","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48923313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-29DOI: 10.1080/13887890.2020.1818640
Diogo Silva Vilela, H. Venancio, Jean Carlos Santos
The Neotropical genus Forcepsioneura is composed of 11 species that inhabit almost exclusively the Brazilian Atlantic Forest domain, with F. sancta (Hagen in Selys, 1860) being the only species of this genus known to occur in the Cerrado biome. Here we describe a new species of Forcepsioneura from the Cerrado of Minas Gerais State, Brazil. This new species is morphologically closer to F. sancta and can be separated from this and other species of Forcepsioneura mainly by the rectangular shape of male prothoracic hind lobe and cerci morphology http://www.zoobank.org/urn:lsid:zoobank.org:pub:5706455E-92F5-44C3-AD13-820F4B5131AE
新热带Forcepsioneura属由11个物种组成，几乎完全栖息在巴西大西洋森林域，其中F. sancta (Hagen in Selys, 1860)是该属中已知的唯一出现在塞拉多生物群系中的物种。在这里，我们描述了来自巴西米纳斯吉拉斯州塞拉多的一种新的Forcepsioneura。该新种在形态上更接近于F. sancta，主要通过雄性前胸后叶的矩形形状和尾毛形态与该种和其他Forcepsioneura种区分开来http://www.zoobank.org/urn:lsid:zoobank.org:pub:5706455E-92F5-44C3-AD13-820F4B5131AE
{"title":"Forcepsioneura machadorum (Coenagrionidae: Protoneurinae) sp. nov. from the Cerrado Biome of Minas Gerais, southeastern Brazil","authors":"Diogo Silva Vilela, H. Venancio, Jean Carlos Santos","doi":"10.1080/13887890.2020.1818640","DOIUrl":"https://doi.org/10.1080/13887890.2020.1818640","url":null,"abstract":"The Neotropical genus Forcepsioneura is composed of 11 species that inhabit almost exclusively the Brazilian Atlantic Forest domain, with F. sancta (Hagen in Selys, 1860) being the only species of this genus known to occur in the Cerrado biome. Here we describe a new species of Forcepsioneura from the Cerrado of Minas Gerais State, Brazil. This new species is morphologically closer to F. sancta and can be separated from this and other species of Forcepsioneura mainly by the rectangular shape of male prothoracic hind lobe and cerci morphology http://www.zoobank.org/urn:lsid:zoobank.org:pub:5706455E-92F5-44C3-AD13-820F4B5131AE","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1818640","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43424160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-20DOI: 10.1080/13887890.2020.1794987
GUO-HUI Yang, Qing Liu
The final stadium larvae of Megalestes micans Needham, 1930 and M. kurahashii Asahina, 1985 are described and illustrated from Yunnan Province, China, and a key to the known larvae of seven species of the genus Megalestes is provided. All exuviae will be stored at the Invertebrate Collection of the College of Agriculture and Life Sciences, Dali University, Dali, Yunnan, China. http://www.zoobank.org/urn:lsid:zoobank.org:pub:461E0535-7F93-4B2E-A53A-F288D6310D73
{"title":"Descriptions of the last instar larvae of two species of Megalestes Selys from Yunnan, China (Odonata: Zygoptera: Synlestidae)","authors":"GUO-HUI Yang, Qing Liu","doi":"10.1080/13887890.2020.1794987","DOIUrl":"https://doi.org/10.1080/13887890.2020.1794987","url":null,"abstract":"The final stadium larvae of Megalestes micans Needham, 1930 and M. kurahashii Asahina, 1985 are described and illustrated from Yunnan Province, China, and a key to the known larvae of seven species of the genus Megalestes is provided. All exuviae will be stored at the Invertebrate Collection of the College of Agriculture and Life Sciences, Dali University, Dali, Yunnan, China. http://www.zoobank.org/urn:lsid:zoobank.org:pub:461E0535-7F93-4B2E-A53A-F288D6310D73","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1794987","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41857127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-17DOI: 10.1080/13887890.2020.1788999
S. Joshi, N. V. D. Poorten, A. Sumanapala, E. Nielsen, Jenis Patel, B. Nielsen, Dattaprasad Sawant, M. Sherif
Polymorphism has rarely been reported from dragonflies of the Libellulidae (Odonata: Anisoptera) family. Here, we report female-limited polymorphism in females of five species of the Libellulidae and a gynandromorph male of Brachythemis contaminata from South Asia. We describe the morphological variation between andromorph and heteromorph females, and collate records of andromorph females from various sources. Yearly number of andromorph females of Crocothemis servilia, Urothemis signata and Neurothemis tullia was calculated using records from published literature and unpublished sources, and social media.
{"title":"New records of polymorphism in Asian libellulid dragonflies (Insecta: Odonata)","authors":"S. Joshi, N. V. D. Poorten, A. Sumanapala, E. Nielsen, Jenis Patel, B. Nielsen, Dattaprasad Sawant, M. Sherif","doi":"10.1080/13887890.2020.1788999","DOIUrl":"https://doi.org/10.1080/13887890.2020.1788999","url":null,"abstract":"Polymorphism has rarely been reported from dragonflies of the Libellulidae (Odonata: Anisoptera) family. Here, we report female-limited polymorphism in females of five species of the Libellulidae and a gynandromorph male of Brachythemis contaminata from South Asia. We describe the morphological variation between andromorph and heteromorph females, and collate records of andromorph females from various sources. Yearly number of andromorph females of Crocothemis servilia, Urothemis signata and Neurothemis tullia was calculated using records from published literature and unpublished sources, and social media.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1788999","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42306150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-11DOI: 10.1080/13887890.2020.1796831
W. Worthen, Mara G. Chamlee
Dragonflies (Insecta: Odonata) use both aquatic and terrestrial ecosystems, and the abundance and diversity of odonates should be good indicators of habitat integrity. To determine which environmental variables affect odonates, we sampled adult dragonflies three times at 12 sites in Pickens and Greenville Counties, SC, USA, in different habitats, at different spatial scales, across a landscape gradient from intact forest to urban locations. At each site, we established two 2 m × 20 m plots along the shoreline of each aquatic habitat. We sampled dragonflies in ten 2 m × 2 m subplots/plot, described the vegetation and substrate in these subplots and adjacent aquatic subplots, and measured the percent cover of different landforms within 500 m of each plot center. Using nested ANOVA and Akaike information criteria models, habitat type and correlating environmental variables (substrate type and bank vegetation) were the best predictors of community structure at all spatial scales. Streams and rivers had fewer individuals and species than lakes, and had a nested subset of species found in lake communities. Landscape elements were also important, with indices declining as barren land and grasslands increased. At the largest scale, anthropogenic changes to the landscape had mixed effects. Small habitats isolated in urban areas had a significantly depauperate, nested subset of species found in communities inhabiting larger natural areas. However, odonate abundance and diversity was highest at human-made lakes and ponds, suggesting that these anthropogenic features help maintain odonate communities.
蜻蜓(昆虫纲:蜻蜓目)利用水生和陆地生态系统，蜻蜓目的丰度和多样性应该是生境完整性的良好指标。为了确定哪些环境变量会影响蜻蜓，我们在美国南卡罗来纳州皮肯斯县和格林维尔县的12个地点，在不同的栖息地，不同的空间尺度，跨越从完整森林到城市地点的景观梯度，对成年蜻蜓进行了三次采样。在每个地点，我们沿着每个水生栖息地的海岸线建立了两个2米× 20米的地块。我们在10个2 m × 2 m的样地/样地取样蜻蜓，描述了这些样地和相邻水生样地的植被和底物，并测量了每个样地中心500 m范围内不同地貌的覆盖率。利用嵌套方差分析和Akaike信息标准模型，生境类型和相关环境变量(基质类型和河岸植被)是各空间尺度上群落结构的最佳预测因子。溪流和河流的个体和物种比湖泊少，并且在湖泊群落中发现了一个嵌套的物种子集。景观要素也很重要，随着荒地和草地的增加，各指数呈下降趋势。在最大规模上，人为对景观的改变产生了复杂的影响。在城市地区孤立的小生境中，在居住在较大自然区域的群落中发现了明显缺乏的筑巢物种子集。然而，在人工湖泊和池塘中，有机物丰度和多样性最高，这表明这些人为特征有助于维持有机物群落。
{"title":"Determinants of adult odonate community structure at several spatial scales: effects of habitat type and landscape context","authors":"W. Worthen, Mara G. Chamlee","doi":"10.1080/13887890.2020.1796831","DOIUrl":"https://doi.org/10.1080/13887890.2020.1796831","url":null,"abstract":"Dragonflies (Insecta: Odonata) use both aquatic and terrestrial ecosystems, and the abundance and diversity of odonates should be good indicators of habitat integrity. To determine which environmental variables affect odonates, we sampled adult dragonflies three times at 12 sites in Pickens and Greenville Counties, SC, USA, in different habitats, at different spatial scales, across a landscape gradient from intact forest to urban locations. At each site, we established two 2 m × 20 m plots along the shoreline of each aquatic habitat. We sampled dragonflies in ten 2 m × 2 m subplots/plot, described the vegetation and substrate in these subplots and adjacent aquatic subplots, and measured the percent cover of different landforms within 500 m of each plot center. Using nested ANOVA and Akaike information criteria models, habitat type and correlating environmental variables (substrate type and bank vegetation) were the best predictors of community structure at all spatial scales. Streams and rivers had fewer individuals and species than lakes, and had a nested subset of species found in lake communities. Landscape elements were also important, with indices declining as barren land and grasslands increased. At the largest scale, anthropogenic changes to the landscape had mixed effects. Small habitats isolated in urban areas had a significantly depauperate, nested subset of species found in communities inhabiting larger natural areas. However, odonate abundance and diversity was highest at human-made lakes and ponds, suggesting that these anthropogenic features help maintain odonate communities.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1796831","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41728724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-27DOI: 10.1080/13887890.2020.1787237
Johanna Hedlund, Eva Ehrnsten, C. Hayward, Philipp Lehmann, Alex Hayward
Tropical America is currently experiencing the establishment of a new apex insect predator, the Paleotropical dragonfly Hemianax ephippiger (Odonata: Aeshnidae). H. ephippiger is migratory and is suggested to have colonised the eastern Neotropics by chance Trans-Atlantic displacement. We report the discovery of H. ephippiger at three new locations in the Caribbean, the islands of Bonaire, Isla de Coche (Venezuela), and Martinique, and we review its reported distribution across the Neotropics. We discuss the establishment of H. ephippiger as a new apex insect predator in the Americas, both in terms of ecological implications and the possible provision of ecosystem services. We also provide an additional new species record for Bonaire, Pantala hymenaea (Odonata: Libellulidae).
{"title":"New records of the Paleotropical migrant Hemianax ephippiger in the Caribbean and a review of its status in the Neotropics","authors":"Johanna Hedlund, Eva Ehrnsten, C. Hayward, Philipp Lehmann, Alex Hayward","doi":"10.1080/13887890.2020.1787237","DOIUrl":"https://doi.org/10.1080/13887890.2020.1787237","url":null,"abstract":"Tropical America is currently experiencing the establishment of a new apex insect predator, the Paleotropical dragonfly Hemianax ephippiger (Odonata: Aeshnidae). H. ephippiger is migratory and is suggested to have colonised the eastern Neotropics by chance Trans-Atlantic displacement. We report the discovery of H. ephippiger at three new locations in the Caribbean, the islands of Bonaire, Isla de Coche (Venezuela), and Martinique, and we review its reported distribution across the Neotropics. We discuss the establishment of H. ephippiger as a new apex insect predator in the Americas, both in terms of ecological implications and the possible provision of ecosystem services. We also provide an additional new species record for Bonaire, Pantala hymenaea (Odonata: Libellulidae).","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1787237","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49513774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-27DOI: 10.1080/13887890.2020.1787871
J.D. Silva-Hurtado, J. Márquez, J. Escoto-Moreno, A. Martínez-Falcón
Odonates have been recognized as an important group for evaluating ecosystems since they are used as bioindicators of the conservation status of the habitat they occupy, in addition to being generalist predators feeding on invertebrates and small vertebrates. In this work, the biodiversity of adult odonates from a locality near the San Marcos River, in Puebla, Mexico, is analyzed through systematic sampling performed during 2018. Species richness and composition patterns were analyzed and compared between the rainy and dry seasons; the results were also compared with those of similar studies at the regional level. There were six families, 21 genera and 37 species that represent about 40% of the 95 species registered in Puebla. Coenagrionidae, with Argia, was the best representative of the Zygoptera, and Libellulidae was the best for the Anisoptera. Three of the species collected in the San Marcos River increased the species number from 95 to 98 for Puebla, making it currently placed 14th of 32 Mexican states in terms of the species richness of odonates nationwide. According to the Chao2 and Bootstrap estimators, the completeness of the inventory varied from 61% to 67% in the dry season, from 73% to 83% in the rainy season, and from 74% to 86% for the annual completeness. There were no significant differences in species richness and composition between the rainy and dry seasons. The species richness of odonates in this locality is the second highest known for Puebla and can still provide important data for this group.
{"title":"Odonate fauna (Insecta: Odonata) from a locality in San Marcos River in the Sierra Norte of Puebla, Mexico","authors":"J.D. Silva-Hurtado, J. Márquez, J. Escoto-Moreno, A. Martínez-Falcón","doi":"10.1080/13887890.2020.1787871","DOIUrl":"https://doi.org/10.1080/13887890.2020.1787871","url":null,"abstract":"Odonates have been recognized as an important group for evaluating ecosystems since they are used as bioindicators of the conservation status of the habitat they occupy, in addition to being generalist predators feeding on invertebrates and small vertebrates. In this work, the biodiversity of adult odonates from a locality near the San Marcos River, in Puebla, Mexico, is analyzed through systematic sampling performed during 2018. Species richness and composition patterns were analyzed and compared between the rainy and dry seasons; the results were also compared with those of similar studies at the regional level. There were six families, 21 genera and 37 species that represent about 40% of the 95 species registered in Puebla. Coenagrionidae, with Argia, was the best representative of the Zygoptera, and Libellulidae was the best for the Anisoptera. Three of the species collected in the San Marcos River increased the species number from 95 to 98 for Puebla, making it currently placed 14th of 32 Mexican states in terms of the species richness of odonates nationwide. According to the Chao2 and Bootstrap estimators, the completeness of the inventory varied from 61% to 67% in the dry season, from 73% to 83% in the rainy season, and from 74% to 86% for the annual completeness. There were no significant differences in species richness and composition between the rainy and dry seasons. The species richness of odonates in this locality is the second highest known for Puebla and can still provide important data for this group.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1787871","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49482330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-14DOI: 10.1080/13887890.2020.1779826
Lucas Pereira Moura, Sheyla Regina Marques Couceiro, L. Juen, D. Veras
Nos riachos tropicais a sazonalidade tem forte influência sobre a heterogeneidade, alterando os recursos disponíveis e ocasionando o carreamento de organismos, substrato e matéria orgânica. Provocando mudanças nas variáveis limnológicas, bem como na composição de espécies. O objetivo de nosso trabalho foi avaliar a congruência de resposta da comunidade de Odonata em duas estações sazonais em riachos da transição entre Cerrado e Caatinga. Foram amostrados 10 riachos afluentes do rio Itapecuru em Caxias, no leste do Maranhão nos meses de julho a dezembro de 2017 (menor precipitação) e em janeiro a junho de 2018 (maior precipitação). Um total de 386 espécimes foram coletados sendo 160 na estação de menor precipitação e 226 para a estação de maior precipitação. Não houve congruência de resposta para a ordem Odonata entre as estações, no entanto, para as subordens separadamente, Zygoptera apresentou alta congruência de imaturo, mas não houve para Anisoptera. Assim, em ambientes que enfrentam um forte estresse hídrico e devido as diferenças ecofisiológicas das subordens, a amostragem de apenas um período sazonal não fornece dados consistentes sobre a composição das espécies (Zygoptera apresentou semelhança na composição entre os dois períodos, mas não para Anisoptera), perdendo informações importantes sobre a diversidade local. Se o foco é a biodiversidade, o uso de subordinados pode estabelecer padrões de diversidade e adaptação entre as estações, tendo em vista as diferenças ecofisiológicas existentes.
{"title":"Congruence of the composition of Odonata between dry and rainy seasons in the Maranhense Cerrado","authors":"Lucas Pereira Moura, Sheyla Regina Marques Couceiro, L. Juen, D. Veras","doi":"10.1080/13887890.2020.1779826","DOIUrl":"https://doi.org/10.1080/13887890.2020.1779826","url":null,"abstract":"Nos riachos tropicais a sazonalidade tem forte influência sobre a heterogeneidade, alterando os recursos disponíveis e ocasionando o carreamento de organismos, substrato e matéria orgânica. Provocando mudanças nas variáveis limnológicas, bem como na composição de espécies. O objetivo de nosso trabalho foi avaliar a congruência de resposta da comunidade de Odonata em duas estações sazonais em riachos da transição entre Cerrado e Caatinga. Foram amostrados 10 riachos afluentes do rio Itapecuru em Caxias, no leste do Maranhão nos meses de julho a dezembro de 2017 (menor precipitação) e em janeiro a junho de 2018 (maior precipitação). Um total de 386 espécimes foram coletados sendo 160 na estação de menor precipitação e 226 para a estação de maior precipitação. Não houve congruência de resposta para a ordem Odonata entre as estações, no entanto, para as subordens separadamente, Zygoptera apresentou alta congruência de imaturo, mas não houve para Anisoptera. Assim, em ambientes que enfrentam um forte estresse hídrico e devido as diferenças ecofisiológicas das subordens, a amostragem de apenas um período sazonal não fornece dados consistentes sobre a composição das espécies (Zygoptera apresentou semelhança na composição entre os dois períodos, mas não para Anisoptera), perdendo informações importantes sobre a diversidade local. Se o foco é a biodiversidade, o uso de subordinados pode estabelecer padrões de diversidade e adaptação entre as estações, tendo em vista as diferenças ecofisiológicas existentes.","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1779826","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42704995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-02DOI: 10.1080/13887890.2020.1768157
J. K. Dickens, Daniel Schoenberger, M. VanCompernolle
The department of Ñeembucú, in south-western Paraguay, is home to the virtually unexplored Ñeembucú Wetlands, the second largest wetland system in the country, representing a major gap in biodiversity knowledge. As organisms ubiquitous with wetlands, the Odonata, or dragonflies (Anisoptera) and damselflies (Zygoptera), have the potential to be effective indicators of wetland habitats in the face of increasing anthropogenic impacts in the region. We therefore comprehensively surveyed the Odonata in central Ñeembucú over a period of two years using a listing method. Here, we present an annotated checklist and identification key to the species present in central Ñeembucú with details on their habitat preferences, phenology and behaviour. We found 60 species but estimate a total of between 62 and 90 species. Eleven (18%) are new records for Paraguay. Species composition is similar to the Argentine Humid Chaco, with four bioregional endemics, whilst representatives from the Andean-Patagonian subregion are present in open areas. Such partitioning of species from different bioregions into different habitats is typical of ecotonal regions. Two further species are endemic to the Paraná-Paraguay basin and three are highly localised, indicating the high conservation value of the Ñeembucú Wetlands. Eleven species have the potential to be effective indicators of the Paraguay River, large permanent wetlands, grassy temporary wetlands and wooded temporary wetlands, providing an effective tool to identify critical wetland ecosystems in the face of the growing threats from human activities. We also provide recommendations for the protection and management of wetlands in the region. urn:lsid:zoobank.org:pub:FC5926FE-5007-446C-86B8-0E36E4D97856
{"title":"Guide to the Odonata of central Ñeembucú, Paraguay: indicator species of wetland habitats","authors":"J. K. Dickens, Daniel Schoenberger, M. VanCompernolle","doi":"10.1080/13887890.2020.1768157","DOIUrl":"https://doi.org/10.1080/13887890.2020.1768157","url":null,"abstract":"The department of Ñeembucú, in south-western Paraguay, is home to the virtually unexplored Ñeembucú Wetlands, the second largest wetland system in the country, representing a major gap in biodiversity knowledge. As organisms ubiquitous with wetlands, the Odonata, or dragonflies (Anisoptera) and damselflies (Zygoptera), have the potential to be effective indicators of wetland habitats in the face of increasing anthropogenic impacts in the region. We therefore comprehensively surveyed the Odonata in central Ñeembucú over a period of two years using a listing method. Here, we present an annotated checklist and identification key to the species present in central Ñeembucú with details on their habitat preferences, phenology and behaviour. We found 60 species but estimate a total of between 62 and 90 species. Eleven (18%) are new records for Paraguay. Species composition is similar to the Argentine Humid Chaco, with four bioregional endemics, whilst representatives from the Andean-Patagonian subregion are present in open areas. Such partitioning of species from different bioregions into different habitats is typical of ecotonal regions. Two further species are endemic to the Paraná-Paraguay basin and three are highly localised, indicating the high conservation value of the Ñeembucú Wetlands. Eleven species have the potential to be effective indicators of the Paraguay River, large permanent wetlands, grassy temporary wetlands and wooded temporary wetlands, providing an effective tool to identify critical wetland ecosystems in the face of the growing threats from human activities. We also provide recommendations for the protection and management of wetlands in the region. urn:lsid:zoobank.org:pub:FC5926FE-5007-446C-86B8-0E36E4D97856","PeriodicalId":50297,"journal":{"name":"International Journal of Odonatology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/13887890.2020.1768157","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47198869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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