共查询到19条相似文献，搜索用时 46 毫秒
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彩步甲属Mastax Fischer von Waldheim在中国分布8种,分别为:布氏彩步甲M.brittoni Quentin,1952、台湾彩步甲M.formosana Dupuis,1912、盖氏彩步甲M.gestroi Bates,1892、宽斑侧步甲M.latefaciata Liebke,1931、饰彩步甲M.ornata Schmidt-Gobel,1846、杂彩步甲M.poecila Schaum,1863、美彩步甲M.pulchella Dejean,1831和大彩步甲M.thermarum(Steven,1806),其中饰彩步甲和大彩步甲为中国新纪录种.依据成虫形态特征编制了中国彩步甲属的分种检索表. 相似文献
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绒蛛步甲属Ａｐｏｔｏｍｕｓ Ｉｌｌｉｇｅｒ已记录１４种,其中一种分布于我国。本文记述产于海南省琼山市的一新种,模式标本保存在华南农业大学昆虫标本室。黑绒蛛步甲Ａｐｏｔｏｍｕｓ ａｔｒｉｐｅｎｎｉｓ Ｍｏｔｃｈｕｌｓｋｙ,１８５８。分布 中国湖北;印度,锡金,孟加拉国及东南亚。琼绒蛛步甲,新种Ａｐｏｔｏｍｕｓ ｑｉｏｎｇｓｈａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．,雌虫：体长３．８ｍｍ,宽１．６ｍｍ。雄虫不说 相似文献
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淡足青步甲Chlaenius pallipes是一类重要的天敌昆虫。为了揭示秦岭地区淡足青步甲的种群遗传分化和种群历史动态,对13个地理种群151个个体的线粒体Cox1-tRNALeu-Cox2片段DNA序列进行了分析。序列比对后的全长为1 602 bp,共检测到57个多态性位点,定义65个单倍型,其中48个为居群内特有单倍型,17个为居群间共享单倍型。单倍型多样性指数Hd 为0.972,核苷酸多样性指数Pi为 0.0025。该种群遗传分化明显,但AMOVA分析结果表明变异主要来源于种群内,占变异总量的92.10%。SAMOVA和PERMUT分析结果均表明秦岭地区的淡足青步甲种群不存在明显的谱系地理结构。结合中性检验、错配分布和BSP分析结果表明该物种发生过种群扩张,且扩张时间大致在0.100-0.025 Ma之间。 相似文献
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步甲属是步甲科昆虫中的一个大属,其以体形大(相对于步甲科昆虫)、体态优美、色彩艳丽而著称.步甲属昆虫多生活于森林中,以蚯蚓、蜗牛等为食,与环境关系密切,在作为生物多样性指示物方面有一定的应用前景.我国步甲属种类非常丰富,且特有成份高.目前已知约410种,其中特有种为324种,占79.02%;在分布于我国的46个亚属中,18个为特有亚属,特有率为39.1%.本文在分析中国步甲属物种多样性及其特点的基础上,对这一类群的研究和保护问题提出了建议. 相似文献
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简要记述了步甲科中国特有属连唇步甲属Sofota Jedlieka 之鉴别特征及地理分布情况,本属原记载2种,即台湾连唇步甲S.chujoi Jedlicka(产于台湾省)和黑连唇步甲S.nigrum Tian et Chen(产于广东省).本文描述采自广东省北部的1新种:南岭连唇步甲S.nanlingense sp.nov.,并提供本属分种检索表. 相似文献
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记述采自越南胡志明市附近Tan Phu火山熔岩管系统中的穴居步甲1新种.模式标本分别保存在巴黎自然博物馆、华南农业大学昆虫标本室和胡志明大学昆虫标本室.德氏伊塔步甲Itamus deuvei,新种(图1～8)本种为伊塔步甲属中两个喜洞穴种类之一(另一种穴伊塔步甲Itamus cavicola,产于巴布亚新几内亚的新爱尔... 相似文献
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Yuno Do Woong-Bae Park Jun-Kyu Park Siae Park Ohseok Kwon Moon Bo Choi 《Entomological Research》2023,53(11):509-517
The relationship between the gut bacterial communities of carabid beetles and their habitats holds implications for understanding ecological dynamics. This study examined the gut bacterial communities of two carabid beetle species, Chlaenius pallipes and Pheropsophus jessoensis, in terraced and flat paddy fields. Differences in gut bacterial communities were evident at the species level and were based on habitat. Specifically, P. jessoensis had a greater presence of Firmicutes and Proteobacteria in terraced fields but more Actinobacteria in flatland fields. In comparison, C. pallipes consistently showed high levels of Firmicutes in both habitats. These differences were reflected at class and genus levels, emphasizing the role of host specificity in shaping gut microbiota. Alpha diversity metrics indicated that P. jessoensis hosted a more diverse bacterial community than C. pallipes. Terraced fields, however, showed slightly reduced diversity in P. jessoensis, suggesting environmental effects on microbial populations. Beta diversity analysis using Bray–Curtis distances differentiated the bacterial communities of the two beetles. Multivariate analysis of variance reinforced these findings. Insights from the Sloan neutral model indicate that environmental factors predominantly influence bacterial community assembly through stochastic processes. Functionally, metabolism was highlighted, indicating the role of gut bacteria in beetle metabolic processes. Notably, energy metabolism varied between field types, revealing environmental effects on gut bacterial functions. This study offers in-depth insights into interactions between host-specific and environmental factors influencing gut bacterial communities of carabid beetles, contributing to a broader understanding of microbial ecology and the roles of environment and host in microbiota dynamics. 相似文献
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秦岭山区隆肛蛙胚后发育的初步观察 总被引：1，自引：0，他引：1
初步观察记录了秦岭山区隆肛蛙Feirana quadrana胚后发育过程.隆肛蛙蝌蚪的头长、体长、尾长和后肢长度随发育时间的增加而显著增长.将隆肛蛙的胚后发育过程划分为20期.其蝌蚪在发育中体色、荚膜(皮肤褶)、侧线以及唇齿式等结构都发生了相应的变化.唇齿式由以II∶ 5-5/II∶ 1-1型为主演变为以II∶ 6-6/II∶ 1-1、I∶ 6-6/II∶ 1-1和II∶ 5-5/II∶ 1-1型为主. 相似文献
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The study on the population status and structure of mountain nyala (Tragelaphus buxtoni) was carried out in the Bale Mountains National Park, Ethiopia during the wet and dry seasons of 2000/2001. Total counts were carried out in an area of 13.1 km2. The count ranged between 682 and 732 individuals. Females comprised 62.9% while males 27.4%. The calf ratio was 9.7%. The group structure of the animals varied with season. Large herds were frequently observed during the wet season and smaller groups during the dry season. Group size changed seasonally. In both seasons, 7–12 individuals were the frequent group size formation. The maximum group (62) was observed during the wet season. The population trend of the animal from 1975 to 1990 indicated a recovery and increase. But between 1990 and 1995 the population showed a continuous and steep decline. However, between 1995 and 2000 the population trend showed a better condition when compared with the previous years. 相似文献
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为调查内蒙古贺兰山国家级自然保护区内岩羊（Pseudois nayaur alashanicus）的种群现状,通过样线法在2017、2018年冬季,2018、2019年春季进行了调查,利用R 4.0.3中的Distance 1.0.2对样线观测数据进行分析,估测保护区内岩羊的种群数量及密度,分析其种群结构。结果显示,调查共观测到岩羊6299只,其中,2018年冬季种群数量最高,约为2654（2230-3161）只（括号内为95%数量置信区间）,种群密度为3.921（3.293-4.668）只/km2。与2003年同季节的调查数据对比发现,保护区内岩羊的种群数量在15年间增长迅速,岩羊的种群密度累计增长了约53.17%,年平均增长3.54%。岩羊集群形式：混合群（88.03%,80.95%）为岩羊冬、春最主要的集群形式,且混合群的数量冬季多于春季,独羊出现的次数最低（1.99%,2.86%）,不同的集群类型在不同的季节的差异极显著（P<0.001）;岩羊平均群大小：春季为（13.439±12.085）只,冬季为（9.011±8.610）只,调查季节中集群大小多为1-10只,岩羊的不同季节的群大小差异极显著（P<0.001）。种群成体与幼体比在不同季节的变化范围为1.411-2.673,雌雄比在不同季节的变化范围为0.934-1.469,种群结构的季节性差异极显著（P<0.001）。集群类型、群大小及群组成的调查表明,不同季节间岩羊种群结构差异明显。 相似文献
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为探究落叶松毛虫种群数量与气象因子的关系,利用大兴安岭地区落叶松毛虫发生年度监测数据与气象数据构建线性回归模型,以赤池信息量准则为评价依据,通过逐步回归的方式从拟合优度和复杂度两方面权衡选取最优模型.采用相对权重法确定影响落叶松毛虫种群数量的关键气象因子,并量化了关键气象因子对松毛虫种群数量的影响.结果表明: 低龄幼虫期和繁殖期是影响落叶松毛虫种群数量的关键时期,而中龄幼虫期和高龄幼虫期的影响较弱; 低龄幼虫期日相对湿度均值、低龄幼虫越冬期日均温小于-22 ℃积温和繁殖期降水总量是影响落叶松毛虫种群数量的关键气象因子; 低龄幼虫期日相对湿度均值和繁殖期降水总量的标准差每增加1倍,落叶松毛虫种群数量的标准差分别减少62%和35%;低龄幼虫越冬期日均温小于-22 ℃积温的标准差每增加1倍,落叶松毛虫种群数量的标准差增加40%.表明全球气候变暖趋势下落叶松毛虫的爆发特点等可能呈现出新的形式,建立长期的种群数量监测体系尤为重要. 相似文献
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黄土高原不同气象因子对中国沙棘亚居群遗传多样性的影响 总被引：2，自引：0，他引：2
顶生金花茶(Camellia terminalis)是一种濒危植物,主要分布在广西天等县石灰岩山钙质土上的常绿阔叶林内.采用样地调查、统计分析和回归模型预测等方法,对顶生金花茶种群的分布环境、资源量现状、大小和高度结构等进行了研究.结果表明:该种群主要依存于天等县小山乡的蚬木-石山樟林(P1)和任豆-蚬木林(P2)、福新乡的枝花李榄-石山楠林(P3)和齿叶大风子-闭花木林(P4)4种群落,构成灌木层的优势种和共优种;P1、P3和P4种群处于群落较稳定的典型常绿季雨林中,结构较完整,属于稳定或增长型;P2种群由于恶劣环境和频繁人为干扰的共同胁迫,有衰退的趋势;与小山乡生境相比,福新乡相对冷凉湿润的气候条件、丰厚肥沃的土层以及较轻度的人为干扰有利于顶生金花茶种群的发展.目前顶生金花茶种群的资源量有限,建议列为\"严重濒临灭绝\"(CR)等级. 相似文献
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The Pleistocene climatic oscillations had profound effects on the demographic history and genetic diversification of plants in arid north-west China where some glacial refugia have been recognized. The genus Ixiolirion comprises three species, of which two, I. tataricum and I. songaricum (endemic), occur in China. In some locations they are sympatric. We investigated their population structure and population history in response to past climatic change using a sample of 619 individuals in 34 populations with nITS and ptDNA sequences. A significant genetic divergence between the two species was supported by a high level of pairwise genetic differentiation, very low gene flow, and phylogenetic analysis showing that I. songaricum haplotypes were monophyletic, whereas those of I. tataricum were polyphyletic. We found significant differentiation and phylogeographic structure in both species. The split of the two species was dated to the late Miocene (～7?Ma), but deep divergence occurred in the mid-late Quaternary. A similar haplotype distribution pattern was found in both species: one to two dominant haplotypes across most populations, with unique haplotypes in a few populations or a geographic group. The genetic diversity, haplotype number, and haplotype diversity decreased from the Yili Valley to the central Tianshan and Barluk Mountains. Additionally, ptDNA analysis showed that I. tataricum diversified in the eastern Tianshan and Barluk Mountains, which might be due to physical barriers to long distance seed dispersal such as desert. In conclusion, our results indicated that the Yili Valley was likely a glacial refuge for Ixiolirion in China, with postglacial dispersal from the Yili Valley eastward to the eastern Tianshan Mountains, and northward to the Barluk Mountains. The climatic changes in the Miocene and Pleistocene and geographic barriers are important factors driving species divergence and differentiation of Ixiolirion and other taxa. 相似文献
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绿僵菌(Metarhizium spp.)是地下害虫重要的生防真菌,为了明确绿僵菌对金针虫的驱避作用,本文以平沙绿僵菌WP08菌株为研究对象,通过Y型管等嗅觉生测方法测定了筛胸梳爪叩甲幼虫对绿僵菌分生孢子、非挥发物和挥发性物的行为反应。结果表明:金针虫的选择行为与土壤中平沙绿僵菌分生孢子浓度密切相关,当土壤中绿僵菌孢子浓度达到5×10~8个·g~(-1)干土时,绿僵菌对金针虫表现出极显著的驱避作用(P0.001),随着浓度的降低,驱避作用减弱,当浓度达到5×10~6个·g~(-1)干土时,驱避作用消失;平沙绿僵菌孢子发酵液(浓度为1×10~8个·mL~(-1))对金针虫驱避作用极显著(P0.001),而挥发物对金针虫驱避作用不明显(P0.05)。本研究结果为揭示绿僵菌驱虫的内在机制提供了重要的基础信息。 相似文献
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Dragana &#x;njegota Astrid Vik Stronen Barbara Boljte Du&#x;ko &#x;irovi&#x; Mihajla Djan Djuro Huber Maja Jelen
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Marjeta Konec Josip Kusak Toma Skrbin&#x;ek 《Ecology and evolution》2021,11(24):18492
The Balkan Peninsula and the Dinaric Mountains possess extraordinary biodiversity and support one of the largest and most diverse wolf (Canis lupus) populations in Europe. Results obtained with diverse genetic markers show west‐east substructure, also seen in various other species, despite the absence of obvious barriers to movement. However, the spatial extent of the genetic clusters remains unresolved, and our aim was to combine fine‐scale sampling with population and spatial genetic analyses to improve resolution of wolf genetic clusters. We analyzed 16 autosomal microsatellites from 255 wolves sampled in Slovenia, Croatia, Bosnia and Herzegovina (BIH), and Serbia and documented three genetic clusters. These comprised (1) Slovenia and the regions of Gorski kotar and Lika in Croatia, (2) the region of Dalmatia in southern Croatia and BIH, and (3) Serbia. When we mapped the clusters geographically, we observed west‐east genetic structure across the study area, together with some specific structure in BIH–Dalmatia. We observed that cluster 1 had a smaller effective population size, consistent with earlier reports of population recovery since the 1980s. Our results provide foundation for future genomic studies that would further resolve the observed west‐east population structure and its evolutionary history in wolves and other taxa in the region and identify focal areas for habitat conservation. They also have immediate importance for conservation planning for the wolves in one of the most important parts of the species’ European range. 相似文献