共查询到15条相似文献,搜索用时 62 毫秒
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<正>2014年5月4日,在河南省罗山县灵山镇附近的一处水田(31°57'9'N,114°19'50"E)发现1只大型鹳形目鸟类。其嘴细长向下弯曲呈黑褐色,头部、颏、上喉和枕部羽冠均呈暗金属绿色,颈部和下体一直到尾下覆羽暗栗红色,后颈的基部以及上背最上部的边缘和翅膀的上缘为紫栗色,背部、腰部、尾上覆羽和尾羽为暗金属紫色,翅膀上的覆羽为金属绿色,逐渐变为紫色。经与《中国鸟类野外手册》(约翰·马敬能等2000)核对,确认为彩鹮(Plegadis falcinellus)。当时该个体在水田中觅食、梳理羽毛。次日再去观察时,该鸟已经离开发现地点。 相似文献
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正2015年11月22日,在湖北省武汉市东西湖区府河柏泉段(30°45′10″N,114°9′15″E)观察并拍摄到小美洲黑雁(Branta hutchinsii)1只(图1),隶属于雁形目鸭科黑雁属。该雁所发现之处,为长江一级支流——府河流经武汉柏泉的河段,该河段夏季被高水位所淹,冬季水位降低后,露出草滩,河道则因人为挖筑的堤岸而形成一个面积数百亩的开阔水面,中间有若干泥土堆积而成的小岛。同域分布有豆雁(Anser fabalis)、灰雁(A.anser)、绿头 相似文献
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正2014年4月7至25日,在湖北省武汉市江夏区汤逊湖千亩塘(30°26'48″N,114°24'27″E)观测到长嘴半蹼鹬(Limnodromus scolopaceus)1只,隶属于鸻形目鹬科半蹼鹬属。该鹬被发现于一大型荷塘内,同域分布有扇尾沙锥(Gallinago gallinago)、林鹬(Tringa glareola)、鹤鹬(T.erythropus)、泽鹬(T.stagnatilis)等鹬科鸟种。借助蔡司60倍单筒望远镜观察,并拍摄下图片及视频后发现,该鹬中等体型,与扇尾沙锥近似,但比鹤鹬小。具长而粗的嘴,全嘴色深。白色眉纹明显。上体体羽深褐色,具浅色羽缘。尾上覆羽具横斑。下体色浅,胸 相似文献
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Jessica A. Oswald Michael G. Harvey Rosalind C. Remsen DePaul U. Foxworth Donna L. Dittmann Steven W. Cardiff Robb T. Brumfield 《Molecular ecology》2019,28(7):1675-1691
Geographic range shifts can cause secondary contact and hybridization between closely related species, revealing mechanisms of species formation and integrity. These dynamics typically play out in restricted geographic regions, but highly vagile species may experience major distributional changes resulting in broad areas of contact. The Glossy Ibis (Plegadis falcinellus) is a dispersive waterbird of the Old World and Australia that colonized eastern North America in the early 19th century and came into contact with the native White‐faced Ibis (P. chihi). Putative hybrids between the two species have been observed across North America. To examine the population genomic consequences of this natural invasion, we sequenced 4,616 ultraconserved elements from 66 individuals sampled across the distributions of falcinellus, chihi, and the Puna Ibis (P. ridgwayi) of South America. We found genomic differentiation among the three species. Loci with high sequence divergence were often shared across all pairwise species comparisons, were associated with regions of high nucleotide diversity, and were concentrated on the Z chromosome. We detected signals of genetic admixture between chihi and falcinellus in individuals both near and far from their core area of sympatry. Genomic cline analyses revealed evidence of greater introgression into falcinellus from chihi, but we found little evidence for selection against hybrids. We also found signals of admixture between ridgwayi and South American populations of chihi. Our results indicate vagile species can experience pervasive introgression upon secondary contact, although we suggest these dynamics may be more ephemeral than the stable hybrid zones often observed in less dispersive organisms. 相似文献
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正2015年8~11月,在湖北神农架森林生态系统国家野外科学观测研究站,3次发现一种此前未监测到的鸟类,鉴定为小黑领噪鹛(Garrulax monileger)。8月5日,在湖北宜昌市兴山县龙门河村黄崩口沟口西侧公路上方山坡(31°19′37′′N,110°28′59′′E,海拔1 292 m),小溪边的化香树(Platycarya strobilacea)林发现5只小黑领噪鹛并拍摄照片(图1);10月21日在龙门河东湾白栎子树包(31°19′32″N,110°31′19″E,海拔1 691 m)的巴山水青冈 相似文献
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该文报道了湖北蕨类植物1个新记录属:冷蕨属(Cystopteris Bernhardi)及对应的新记录种宝兴冷蕨(Cystopteris moupinensis Franchet); 4个新记录种:台湾剑蕨(Loxogramme formosana Nakai)、扇羽阴地蕨[Botrychium lunaria (Linnaeus) Swartz]、耳状紫柄蕨[Pseudophegopteris aurita (Hooker) Ching]、巢形鳞毛蕨[Dryopteris transmorrisonense (Hayata) Hayata]; 2个新记录变种:尾头凤尾蕨(Pteris oshimensis var.paraemeiensis Ching)和西藏粉背蕨[Aleuritopteris subvillosa var. tibetica (ChingS. K. Wu) H. S. Kung]。这些蕨类新记录在湖北的发现,大大丰富了湖北的植物区系及物种多样性,同时对这些蕨类的经济价值或药用价值进行了简要分析,为其资源的进一步合理开发和利用提供了一些理论依据。 相似文献
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2011~2013年对湖北神农架国家级自然保护区进行了第四次全国中药资源普查,调查过程中发现了湖北十字花科3个新记录属——双果荠属(Megadenia Maximowicz)、念珠芥属(Neotorularia HedgeJ.Léonard)、大蒜芥属(Sisymbrium Linnaeus)以及对应的3个湖北分布新记录种双果荠(Megadenia pygmaea Maximowicz)、蚓果芥(Neotorularia humilis(C.A.Meyer)HedgeJ.Léonard)、全叶大蒜芥(Sisymbrium luteum(Maximowicz)O.E.Schulz)。并对其地理分布进行了分析,为该区域的生物多样性及其植物区系组成研究提供了新的资料。 相似文献