共查询到20条相似文献,搜索用时 109 毫秒
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报道了纽藓属(丛藓科)中国新记录——节叶纽藓(Tortella alpicola Dix.)(新拟)。该种主要分布于北美洲、欧洲和亚洲,在中国为首次记录。该种特征:植物体高约1cm,基部细胞雪白色,叶尖端易断裂且形成若干分节。该文对节叶纽藓的形态特征和地理分布进行了详细描述,将其与折叶纽藓[T.fragilis(Hook.Wils.)Limpr.]、长叶纽藓[T.tortuosa(Hedw.)Limpr.]和纽藓[T.humilis(Hedw.)Jenn.]进行了比较分析,并提供了该种的图版和中国纽藓属的分种检索表。 相似文献
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杜氏长喙藓(Rhynchostegium duthiei Müll.Hal.ex Dixon)以往仅在印度的东北部及不丹有分布记载.本文首次报道了该种在中国的新分布.提供了该种详细的形态特征图和特征描述,并对其与相近种斜枝长喙藓[Rh.in-clinatum(Mitt.)A.Jaeger]的区别与联系进行了讨论. 相似文献
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报道产自贵州省的中国藓类植物一新记录种———芒果树生藓( Erpodium mangiferae)。树生藓科( Erp-odiaceae)隶属于变齿藓目( Isobryales)木灵藓亚目( Orthotrichinales),该科全世界共有5属24种,主要分布在热带地区。中国报道有3属4种。该科的树生藓属( Erpodium),在我国曾经有过2种的记录,被认为是细鳞藓[Solmsiella biseriata (Austin) Steere.]和钟帽藓[Venturiella sinensis (Vent.) C. Müll.]的异名。2004年熊源新等人在贵州省罗甸县红水河谷采到1号树生藓科标本,最终鉴定为芒果树生藓( E. mangiferae C. Muell.)。此次发现也为树生藓属在中国的新分布记录。至此,我国的树生藓科共有4属5种。该文根据对标本的显微观察提供了详细的形态描述和各部分细节线条图,并对该种的分布状况进行了简要的讨论。根据资料,该种主要分布于印度南部、中部、北部和东北部,该种的发现地“贵州罗甸县红水河谷”从经纬度上看,与此前报道的最北分布地印度阿萨姆邦基本在同一纬度上,仅在经度上相差约10°,距离上相差约1400 km。该种与Erpodium glaziovii的外形相似,但根据雌苞叶与营养叶的尺寸比较,以及叶片细胞中是否存在原始小囊( primordial utri-cle)等可将两者区分开。 相似文献
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该文报道了短尖拟青藓[Sciuro-hypnum ornellanum (Molendo) Ignatov & Huttunen]在新疆阿尔泰山的分布,这是该种在中国的首次记录。详细介绍了拟青藓属[Sciuro-hypnum (Hampe) Hampe]的由来,讨论了短尖拟青藓的形态特征及其地理分布,对其与形态相近种进行了比较分析,并提供了中国拟青藓属分种检索表。该种的发现不仅为中国青藓科植物研究提供了新资料,同时也进一步佐证了中国新疆植物区系与俄罗斯、中亚及欧洲的密切联系。 相似文献
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从青海省祁连山脉首次报道了奥地利真藓(Bryum austriacum Kockinger, Holyoak&Suanjak)在中国的分布。该种的主要识别特征为:植株纤弱,黄绿色至浅褐色;叶卵状披针形,强烈内凹,覆瓦状排列;叶细胞大,薄壁,疏松排列;大量深棕红色的卵状芽胞在叶腋处单个着生;叶原基小,半透明。该种可能起源于中亚,是高山草甸上腐殖质和富营养化土壤的先锋植物。编制了中国真藓属中有叶腋生球形芽胞物种的分种检索表。标本存放于华东师范大学植物标本馆(HSNU)和焦作师专植物标本馆(JZNC)。 相似文献
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Alexandra Laitly Corey T. Callaghan Kaspar Delhey William K. Cornwell 《Ecology and evolution》2021,11(9):4071
- Color research continuously demands better methods and larger sample sizes. Citizen science (CS) projects are producing an ever‐growing geo‐ and time‐referenced set of photographs of organisms. These datasets have the potential to make a huge contribution to color research, but the reliability of these data need to be tested before widespread implementation.
- We compared the difference between color extracted from CS photographs with that of color extracted from controlled lighting conditions (i.e., the current gold standard in spectrometry) for both birds and plants. First, we tested the ability of CS photographs to quantify interspecific variability by assessing > 9,000 CS photographs of 537 Australian bird species with controlled museum spectrometry data. Second, we tested the ability of CS photographs to quantify intraspecific variability by measuring petal color data for two plant species using seven methods/sources with varying levels of control.
- For interspecific questions, we found that by averaging out variability through a large sample size, CS photographs capture a large proportion of across species variation in plumage color within the visual part of the spectrum (R2 = 0.68–0.71 for RGB space and 0.72–0.77 for CIE‐LAB space). Between 12 and 14 photographs per species are necessary to achieve this averaging effect for interspecific studies. Unsurprisingly, the CS photographs taken with commercial cameras failed to capture information in the UV part of the spectrum. For intraspecific questions, decreasing levels of control increase the color variation but averaging larger sample sizes can partially mitigate this, aside from particular issues related to saturation and irregularities in light capture.
- CS photographs offer a very large sample size across space and time which offers statistical power for many color research questions. This study shows that CS photographs contain data that lines up closely with controlled measurements within the visual spectrum if the sample size is large enough, highlighting the potential of CS photographs for both interspecific and intraspecific ecological or biological questions. With regard to analyzing color in CS photographs, we suggest, as a starting point, to measure multiple random points within the ROI of each photograph for both patterned and unpatterned patches and approach the recommended sample size of 12–14 photographs per species for interspecific studies. Overall, this study provides groundwork in analyzing the reliability of a novel method, which can propel the field of studying color forward.
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VICKY J. MERETSKY VIRGIL BRACK JR. TIMOTHY C. CARTER RICHARD CLAWSON ROBERT R. CURRIE TRACI A. HEMBERGER CARL J. HERZOG ALAN C. HICKS JOSEPH A. KATH JOHN R. MACGREGOR R. ANDREW KING DAVID H. GOOD 《The Journal of wildlife management》2010,74(1):166-173
ABSTRACT The size and distribution of measurement errors associated with major techniques for estimating numbers of hibernating bats are unstudied, although this is the principle method of enumerating several endangered bat species. However, decisions concerning the listing status of a species under the Endangered Species Act require consistent and accurate estimation of population size and trends. Recent advances in digital photography have improved the ability to produce a quantitative record of the numbers of bats in hibernacula. We surveyed clusters of Indiana bats in a hibernaculum and compared results from counts of digital photographs of clusters to results from 4 variations of visual estimation. We counted bats in photographs using Geographic Information System digitization over the photograph. Total counts from 2 sets of photographs varied by <1.5%. Nonphotographic estimation techniques varied from 76% to 142% of counts from photographs for clusters for which estimation (rather than counting) was used. Where feasible, photography can improve status and trend information for species of concern, permitting more timely and specific management actions. 相似文献
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Tanaka M 《Primates; journal of primatology》2003,44(2):157-165
With a free-choice task, visual preference was estimated in five adult chimpanzees (Pan troglodytes). The subjects were presented with digitized color photographs of various species of primates on a CRT screen. Their touching
responses to the photographs were reinforced by food reward irrespective of which photographs they touched. The results revealed
that all chimpanzees touched the photographs of humans significantly more than any other species, or phylogenetic families
of primates. This tendency was consistent across different stimulus sets. The results suggest that the chimpanzees showed
visual preference for the photographs of humans over those of their own species. The results also suggest that the degree
of this visual preference was not in accordance with phylogenetic distance from the subjects' species, chimpanzees. The preference
for humans was stronger in the case of the colored photographs than in monochromatic ones. All of the five chimpanzees had
been in captivity for at least 16 years. They were reared by humans from just after their birth, or at least from 1.5 years
old. Their preference might have developed through social experience, especially that during infanthood.
Electronic Publication 相似文献
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A New Species of the Genus Colilodion Besuchet (Coleoptera: Staphylinidae: Pselaphinae) from Vietnam
A new pselaphine species, Colilodion thienmu n. sp., is described from Mt. Bach Ma in Central Vietnam. SEM photographs of this species are provided and morphological notes are given in this study. 相似文献
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Abstract A method using digital photography to enable confirmation of taxonomic identifications of mosquito specimens is presented. Portfolio documents containing up to 20 photographs of various taxonomic features of exotic mosquito species were taken through the microscope, reformatted and sent via email for confirmation of the identifications. Examples of the photographs produced are provided in this paper. The method has advantages in situations requiring rapid turnaround times, such as biosecurity responses. 相似文献
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锥羽蛾属Gillmeria全世界已记录13种,除G.omissalis(Fletcher)分布于澳大利亚外,其余12种均分布在全北区,而G.pallidactyla(Haworth)在巴西也有记录.我国原记录有4种,本文记述8种,包括3新种和中国1新纪录种.新种为:楔锥羽蛾G cuneiformis sp.nov.,点斑锥羽蛾G.fuscata sp.nov.和佛坪锥羽蛾G.fopingensis sp.nov.新纪录种环锥羽蛾G.ochrodactyla(Denis &Schiffermüller).文中给出了中国锥羽蛾属的分种检索表,并提供了成虫图和外生殖器特征图.研究标本及模式标本分别保存在南开大学生物系昆虫标本室和中国科学院动物研究所昆虫标本馆. 相似文献
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连小卷蛾属系统分类研究(鳞翅目:卷蛾科:新小卷蛾亚科) 总被引:1,自引:0,他引:1
本文对连小卷蛾属Nuntiella Kuznetsov进行了系统研究,共记述三个种研究,其中有两个新种:阔端连小卷蛾Nuntiella laticuculla sp. Nov.和狭翅连小卷蛾Nuntiella angustiptera sp. Nov.。首次描述了连小卷蛾属的雌性外生殖器特征。文中提供了成虫和外生殖器特征图及分种检索表。模式标本保存在南开大学生物系。 相似文献
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报道了锈盘衣属(Bellemerea Hafellner&Cl.Roux)地衣中国新纪录种,即高山锈盘衣(B.alpina(Sommerf.)Clauzade&Cl.Roux)。从形态学、解剖学、化学及生境方面进行了详细的描述,并提供了形态和解剖特征相关的彩色图片。 相似文献
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Visual preference was evaluated in a male agile gibbon. The subject was raised by humans immediately after birth, but lived
with his biological family from one year of age. Visual preference was assessed using a free-choice task in which five or
six photographs of different primate species, including humans, were presented on a touch-sensitive screen. The subject touched
one of them. Food rewards were delivered irrespective of the subject’s responses. We prepared two types of stimulus sets.
With set 1, the subject touched photographs of humans more frequently than those of other species, recalling previous findings
in human-reared chimpanzees. With set 2, photographs of nine species of gibbons were presented. Chimpanzees touched photographs
of white-handed gibbons more than those of other gibbon species. The gibbon subject initially touched photographs of agile
gibbons more than white-handed gibbons, but after one and two years his choice patterns resembled the chimpanzees’. The results
suggest that, as in chimpanzees, visual preferences of agile gibbons are not genetically programmed but develop through social
experience during infancy. 相似文献