scholarly journals Additional notes on Cistanthe philhershkovitziana Hershk. (Montiaceae)

2018 ◽  
Author(s):  
Mark Hershkovitz
Keyword(s):  
Social Network ◽  
Species Range ◽  
Herbarium Specimens ◽  
Historical Collections

Scrutiny of online herbarium and social network images revealed at least three historical collections and one recent photograph of the recently described Cistanthe philhershkovitziana Hershk. (C. sect. Cistanthe). The herbarium specimens, dating to 1829, 1882, and 1905, corroborate, and extend slightly the species range estimated on the basis of unvouchered collections and observations C. grandiflora (Lindl.) Schlect.

scholarly journals Inventory of the historical Dianthus sylvestris herbarium materials from Herbarium Croaticum and Herbarium Ivo and Marija Horvat

2020 ◽  
Vol 8 (1) ◽  
pp. 8-14
Author(s):  
Ana Terlević ◽  
Ivana Rešetnik
Keyword(s):  
Balkan Peninsula ◽  
Herbarium Specimens ◽  
Molecular Analyses ◽  
Historical Collections ◽  
Taxonomical Revision ◽  
Insight Into

In order to initiate a taxonomical revision of the Dianthus sylvestris group, an inventory of historical herbarium materials from ZA and ZAHO collections was conducted. Herbarium specimens of D. sylvestris group from these two herbaria were digitized and the data from the original herbarium labels were inserted in the Flora Croatica Database. A total of 344 herbarium sheets were digitized and six taxa (D. sylvestris Wulfen in Jacq. ssp. sylvestris, D. sylvestris ssp. tergestinus (Rchb.) Hayek, D. sylvestris ssp. longicaulis (Ten.) Greuter et Burdet, D. sylvestris ssp. nodosus (Tausch) Hayek, D. siculus C. Presl and D. arrosti C. Presl) were registered within studied collections. Inventory of herbarium sheets from ZA and ZAHO historical collections provided a significant insight into historical distributional data of D. sylvestris taxa related to the area of the Balkan Peninsula, which is a prerequisite for accurate taxonomic/ geographic sampling for further morphological and molecular analyses.

scholarly journals Typical specimens of genus Artemisia L. s.l. (Asteraceae) kept in the herbarium of St. Petersburg State University (LECB)

2016 ◽  
Author(s):  
Alexander Korobkov ◽  
Vyacheslav Byalt ◽  
Valentina Bubyreva
Keyword(s):  
Central Asia ◽  
Hawaiian Islands ◽  
Critical Study ◽  
Herbarium Specimens ◽  
State University ◽  
Type Specimens ◽  
Historical Collections

This article continues a series of publications devoted to the historical collections and collections of type herbarium specimens stored in the Herbarium of Department of Botany, St. Petersburg State University (SPbSU) (LECB). As a result of critical study of the genus Artemisia L. s. l. (Asteraceae) in the Herbarium LECB 134 type specimens for 93 taxa of the genera Absinthium Mill. and Artemisia L. (43 species, 1 subspecies, 48 varieties and 1 form) are identified. In the collection the types (syntype and isotypes) for taxa described by C. Willdenow, M. von Bieberstein, C. Ledebour, W. Besser, A. Bunge, I. M. Krasheninnikov and some others from Siberia, Central Asia, Iran, Caucasus, Crimea and even the Hawaiian Islands in Oceania are presented. Refs 22.

scholarly journals Taxonomic Revision of Staurogyne (Nelsonioideae, Acanthaceae) in the Neotropics

Phytotaxa ◽  
2017 ◽  
Vol 296 (1) ◽  
pp. 1 ◽  
Author(s):  
DENISE MONTE BRAZ ◽  
REINALDO MONTEIRO
Keyword(s):  
Taxonomic Revision ◽  
Morphological Characters ◽  
Southeastern Brazil ◽  
Herbarium Specimens ◽  
South American ◽  
Southern Brazil ◽  
Key To Species ◽  
Historical Collections ◽  
Species Descriptions ◽  
Diagnostic Importance

Twenty-eight species of Staurogyne are recognized from the Neotropics, where the genus is distributed from Mexico to southern Brazil. The study of herbarium specimens, especially from Brazil and other South American countries, including historical collections from many European herbaria, resulted in the recognition of numerous new geographical records. Morphological characters of diagnostic importance are discussed for the genus and species, for which aspects of the inflorescence, corolla, gynoecium and indument are important for identification. In Neotropical Staurogyne, the corolla may have two basic forms: 1) short, infundibular, and white (often with markings on the limb and throat), and 2) long, tubular, and yellow or red. Species with the latter form of the corolla are restricted to southeastern Brazil. Eight synonymizations and one lectotyfication are proposed, while a key to species, descriptions, illustrations and comments on taxonomy, phenology and geographical distribution are provided.

scholarly journals Vascular Flora of Adobe Valley and Surrounding Hills, Mono County, California

Aliso ◽  
2021 ◽  
Vol 38 (1) ◽  
pp. 32-61
Author(s):  
Sophie Winitsky
Keyword(s):  
Sierra Nevada ◽  
Great Basin ◽  
Mojave Desert ◽  
Conservation Status ◽  
Vascular Plant ◽  
Herbarium Specimens ◽  
Vascular Flora ◽  
Historical Collections ◽  
Wetland Complex ◽  
Wind Energy Development

Adobe Valley and the Adobe Hills lie east of the Sierra Nevada in Mono County, California, and are within the Great Basin Floristic Province. The flora of Adobe Valley and the surrounding hills is influenced by the Great Basin Desert to the east, the Sierra Nevada to the west and the northern Mojave Desert to the south. Adobe Valley is surrounded by the Adobe Hills, Benton Range and Glass Mountain region, creating a circular closed basin with many small tributaries feeding into it. This topography contributes to the creation of a rare wetland complex, including alkali meadows, marshes, and lakes at the base of the hills, which represent some of the more botanically interesting terrain in the region. Prior to this study, the wetland complex of Adobe Valley had not been systematically investigated with regard to its botanical diversity. The vegetation types associated with the wetland complex are listed as threatened by the California Natural Diversity Database and face a number of conservation concerns including water pumping, overgrazing, and possible wind energy development. A total of 1525 herbarium specimens were collected within the study area over 59 days in the field from 2016 to 2018. The vascular flora of the Adobe Valley and Hills includes 397 minimum-rank vascular plant taxa, representing 194 genera and 61 families. Six taxa are only known from historical collections, 21 taxa are non-native and 27 taxa have conservation status. The results of the inventory are presented here in an annotated checklist, along with descriptions of vegetation alliances.

scholarly journals Databasing and georeferencing historical collections to discover potential sites for rare and endangered plants of New York, U.S.A.

2018 ◽  
Vol 12 (1) ◽  
pp. 323-368
Author(s):  
Carol L. Kelloff ◽  
Lee B. Kass
Keyword(s):  
New York ◽  
Google Earth ◽  
Conservation Priorities ◽  
Herbarium Specimens ◽  
Historical Collections ◽  
Plant Collections ◽  
Label Information ◽  
Rare And Endangered ◽  
Plant Families ◽  
Life On Earth

Over 400 years of natural history inventories of preserved specimens and vouchers in museums and research institutions are now important repositories of invaluable information and permanent records documenting life on earth. Plant collections, in particular, play roles in understanding climate change, conservation modeling, molecular and medicinal studies, invasive-species management, and biodiversity assessments. Researchers reexamine these collections in order to establish conservation priorities for threatened and endangered taxa. Herbarium specimens, spanning many decades, can provide data on a natural population’s geographical range and its shift over time. Although historical specimens provide valuable information about past distributions, label information may lack geographic coordinates or precise locations, or may have descriptions that are too vague or confusing to be useful. Here we present a case study for plant specimens collected by Thomas F. Lucy in the late 1800’s in Chemung County, New York. The goal of this research was to determine if Lucy’s label localities could be improved using historical land use and topographic maps, and georeferenced using Google Earth©. Lucy documented 134 plant families for the Chemung County area: 106 species of flowering plants (ca. 982 taxa, excluding hybrids), 12 fern and fern allies (48 taxa), 13 mosses (21 taxa), and one species each for lichens, liverworts, and algae. Nine taxa are noteworthy for the state of New York. Fourteen taxa are listed as endangered, threatened, or unknown: Chaerophyllum procumbens (Apiaceae), Arabis shortii (Brassicaceae), Cacalia suaveoleus and Lactuca floridana (Compositae), Carex retroflexa (Cyperaceae), Hydrangea arborescens (Hydrangeaceae), Allium cernuum and Chamaelirium luteum (Liliaceae), Liparis lilifolia and Platanthera hookeri (Orchidaceae), Polygonum erectum (Polygonaceae), Lysimachia quadrifolia (Primulaceae), Geum virginianum (Rosaceae) and Vitis vulpine (Vitaceae). Nine other plants are recommended for protection: Panax quinquefolius (Araliaceae), Rudbeckia fulgida (Compositae), Carex conjuncta (Cyperaceae), Pterospora andromedea (Ericaceae), Aesculus grabra (Hippocastanaceae), Epilobium ciliatum (Onagraceae), Cypripedium arietinum (Orchidaceae), and Calamagrostis porteri and Panicum scoparium (Poaceae).

The social network

2013 ◽  
Vol 44 (2) ◽  
pp. 22
Author(s):  
ALAN ROCKOFF
Keyword(s):  
Social Network ◽  
The Social

Abstract #1249: Novel Use of Physician Social Network Data to Map the Gap in the Endocrinology Workforce

2015 ◽  
Vol 21 ◽  
pp. 301
Author(s):  
Armand Krikorian ◽  
Lily Peng ◽  
Zubair Ilyas ◽  
Joumana Chaiban
Keyword(s):  
Social Network ◽  
Network Data ◽  
Social Network Data

Correlating Personality and Actual Phone Usage

2014 ◽  
Vol 35 (3) ◽  
pp. 158-165 ◽  
Author(s):  
Christian Montag ◽  
Konrad Błaszkiewicz ◽  
Bernd Lachmann ◽  
Ionut Andone ◽  
Rayna Sariyska ◽  
...  
Keyword(s):  
Big Data ◽  
Social Network ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Self Report ◽  
Psychological Variables ◽  
New Approach ◽  
Report Data ◽  
Self Report Data ◽  
Voice Calls

In the present study we link self-report-data on personality to behavior recorded on the mobile phone. This new approach from Psychoinformatics collects data from humans in everyday life. It demonstrates the fruitful collaboration between psychology and computer science, combining Big Data with psychological variables. Given the large number of variables, which can be tracked on a smartphone, the present study focuses on the traditional features of mobile phones – namely incoming and outgoing calls and SMS. We observed N = 49 participants with respect to the telephone/SMS usage via our custom developed mobile phone app for 5 weeks. Extraversion was positively associated with nearly all related telephone call variables. In particular, Extraverts directly reach out to their social network via voice calls.

Extraverts Have Larger Social Network Layers

2011 ◽  
Vol 32 (3) ◽  
pp. 161-169 ◽  
Author(s):  
Thomas V. Pollet ◽  
Sam G. B. Roberts ◽  
Robin I. M. Dunbar
Keyword(s):  
Social Network ◽  
Social Relationships ◽  
Outer Layer ◽  
Network Size ◽  
Emotional Intensity ◽  
Emotional Closeness ◽  
Network Layer ◽  
Network Layers ◽  
Social Network Size

Previous studies showed that extraversion influences social network size. However, it is unclear how extraversion affects the size of different layers of the network, and how extraversion relates to the emotional intensity of social relationships. We examined the relationships between extraversion, network size, and emotional closeness for 117 individuals. The results demonstrated that extraverts had larger networks at every layer (support clique, sympathy group, outer layer). The results were robust and were not attributable to potential confounds such as sex, though they were modest in size (raw correlations between extraversion and size of network layer, .20 < r < .23). However, extraverts were not emotionally closer to individuals in their network, even after controlling for network size. These results highlight the importance of considering not just social network size in relation to personality, but also the quality of relationships with network members.

The Multilevel p2 Model

Methodology ◽  
2006 ◽  
Vol 2 (1) ◽  
pp. 42-47 ◽  
Author(s):  
Bonne J. H. Zijlstra ◽  
Marijtje A. J. van Duijn ◽  
Tom A. B. Snijders
Keyword(s):  
Social Network ◽  
Network Data ◽  
Mcmc Algorithm ◽  
Independent Observation ◽  
Single Observation ◽  
Multiple Networks ◽  
Social Network Data ◽  
Multiple Observations ◽  
Practical Support ◽  
The Social

The p 2 model is a random effects model with covariates for the analysis of binary directed social network data coming from a single observation of a social network. Here, a multilevel variant of the p 2 model is proposed for the case of multiple observations of social networks, for example, in a sample of schools. The multilevel p 2 model defines an identical p 2 model for each independent observation of the social network, where parameters are allowed to vary across the multiple networks. The multilevel p 2 model is estimated with a Bayesian Markov Chain Monte Carlo (MCMC) algorithm that was implemented in free software for the statistical analysis of complete social network data, called StOCNET. The new model is illustrated with a study on the received practical support by Dutch high school pupils of different ethnic backgrounds.

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