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Application of ontologies in peer-to-peer database with routing queries based on ant colony algorithm

Valêncio, Carlos Roberto; Costa, Leandro Rincon; El Hetti Laurenti, Carlos Henrique; Cansian, Adriano Mauro
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Conferência ou Objeto de Conferência Formato: 287-292
ENG
Relevância na Pesquisa
26.62%
A significant set of information stored in different databases around the world, can be shared through peer-topeer databases. With that, is obtained a large base of knowledge, without the need for large investments because they are used existing databases, as well as the infrastructure in place. However, the structural characteristics of peer-topeer, makes complex the process of finding such information. On the other side, these databases are often heterogeneous in their schemas, but semantically similar in their content. A good peer-to-peer databases systems should allow the user access information from databases scattered across the network and receive only the information really relate to your topic of interest. This paper proposes to use ontologies in peer-to-peer database queries to represent the semantics inherent to the data. The main contribution of this work is enable integration between heterogeneous databases, improve the performance of such queries and use the algorithm of optimization Ant Colony to solve the problem of locating information on peer-to-peer networks, which presents an improve of 18% in results. © 2011 IEEE.

Database marketing intelligence methodology supported by ontologies and knowlegde discovery in databases

Pinto, Filipe
Fonte: Universidade do Minho Publicador: Universidade do Minho
Tipo: Tese de Doutorado
Publicado em 30/09/2009 ENG
Relevância na Pesquisa
26.68%
Tese de doutoramento em Tecnologias e Sistemas de Informação; Actualmente as organizações actuam em ambientes caracterizados pela inconstância, elevada competitividade e pressão no desenvolvimento de novas abordagens ao mercado e aos clientes. Nesse contexto, o acesso à informação, o suporte à tomada de decisão e a partilha de conhecimento tornam-se essenciais para o desempenho organizativo. No domínio do marketing têm surgido diversas abordagens para a exploração do conteúdo das suas bases de dados. Uma das abordagens, utilizadas com maior sucesso, tem sido o processo para a descoberta de conhecimento em bases de dados. Por outro lado, a necessidade de representação e partilha de conhecimento tem contribuído para um crescente desenvolvimento das ontologias em áreas diversas como sejam medicina, aviação ou segurança. O presente trabalho cruza diversas áreas: tecnologias e sistemas de informação (em particular a descoberta de conhecimento), o marketing (especificamente o database marketing) e as ontologias. O objectivo principal desta investigação foca o papel das ontologias em termos de suporte e assistência ao processo de descoberta de conhecimento em bases de dados num contexto de database marketing. Através de abordagens distintas foram formuladas duas ontologias: ontologia para o processo de descoberta de conhecimento em bases de dados e...

Relational databases digital preservation

Freitas, Ricardo André Pereira
Fonte: Universidade do Minho Publicador: Universidade do Minho
Tipo: Tese de Doutorado
Publicado em 24/07/2013 ENG
Relevância na Pesquisa
26.6%
Tese doutoramento - Programa Doutoral em Informática; With the expansion and growth of information technologies, much of human knowledge is now recorded on digital media. It began in the 20th century, it has been occurring continuously and it seems that there is no turning back. This paradigm brings scenarios where humans need mediators to understand digital information { computer platforms. These platforms are constantly changing and evolving and nothing can guarantee the continuity of access to digital artifacts in their absence. A new problem in the digital universe arises: Digital Preservation. There are huge volumes of information stored digitally and there are also a panoply of di erent classes, formats and types of digital objects. Our work addresses the problematic Digital Preservation and focuses on the logic and conceptual models within a speci c class of digital objects: Relational Databases. This family of digital objects is used by organizations to record their data produced on daily basis by information systems at operational levels or others. This structures are complex and the relational databases software support may di er from one organization to another. It can be proprietary, free or open source. Previously...

Databases and software for the analysis of mutations in the human p53 gene, the human hprt gene and the lacZ gene in transgenic rodents.

Cariello, N F; Douglas, G R; Soussi, T
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 01/01/1996 EN
Relevância na Pesquisa
26.6%
We have created databases and software applications for the analysis of DNA mutations in the human p53 gene, the human hprt gene and the rodent transgenic lacZ locus. The databases themselves are stand-alone dBase files and the software for analysis of the databases runs on IBM- compatible computers. The software created for these databases permits filtering, ordering, report generation and display of information in the database. In addition, a significant number of routines have been developed for the analysis of single base substitutions. One method of obtaining the databases and software is via the World Wide Web (WWW). Open home page http://sunsite.unc.edu/dnam/mainpage.ht ml with a WWW browser. Alternatively, the databases and programs are available via public ftp from anonymous@sunsite.unc.edu. There is no password required to enter the system. The databases and software are found in subdirectory pub/academic/biology/dna-mutations. Two other programs are available at the WWW site, a program for comparison of mutational spectra and a program for entry of mutational data into a relational database.

Databases and software for the analysis of mutations in the human p53 gene, the human hprt gene and both the lacI and lacZ gene in transgenic rodents.

Cariello, N F; Douglas, G R; Dycaico, M J; Gorelick, N J; Provost, G S; Soussi, T
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 01/01/1997 EN
Relevância na Pesquisa
26.6%
We have created databases and software applications for the analysis of DNA mutations at the humanp53gene, the humanhprtgene and both the rodent transgeniclacIandlacZlocus. The databases themselves are stand-alone dBASE files and the software for analysis of the databases runs on IBM-compatible computers. Each database has a separate software analysis program. The software created for these databases permit the filtering, ordering, report generation and display of information in the database. In addition, a significant number of routines have been developed for the analysis of single base substitutions. One method of obtaining the databases and software is via the World Wide Web (WWW). Open the following home page with a Web Browser: http://sunsite.unc.edu/dnam/mainpage.ht ml . Alternatively, the databases and programs are available via public FTP from: anonymous@sunsite.unc.edu . There is no password required to enter the system. The databases and software are found beneath the subdirectory: pub/academic/biology/dna-mutations. Two other programs are available at the site-a program for comparison of mutational spectra and a program for entry of mutational data into a relational database.

Databases and software for the analysis of mutations in the human p53 gene, human hprt gene and both the lacI and lacZ gene in transgenic rodents.

Cariello, N F; Douglas, G R; Gorelick, N J; Hart, D W; Wilson, J D; Soussi, T
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 01/01/1998 EN
Relevância na Pesquisa
26.6%
We have created databases and software applications for the analysis of DNA mutations at the human p53 gene, the human hprt gene and both the rodent transgenic lacI and lacZ loci. The databases themselves are stand-alone dBASE files and the software for analysis of the databases runs on IBM-compatible computers with Microsoft Windows. Each database has a separate software analysis program. The software created for these databases permit the filtering, ordering, report generation and display of information in the database. In addition, a significant number of routines have been developed for the analysis of single base substitutions. One method of obtaining the databases and software is via the World Wide Web. Open the following home page with a Web Browser: http://sunsite.unc.edu/dnam/mainpage. html . Alternatively, the databases and programs are available via public FTP from: anonymous@sunsite.unc.edu. There is no password required to enter the system. The databases and software are found beneath the subdirectory: pub/academic/biology/dna-mutations. Two other programs are available at the site, a program for comparison of mutational spectra and a program for entry of mutational data into a relational database.

A survey of population-based drug databases in Canada.

Miller, E; Blatman, B; Einarson, T R
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 15/06/1996 EN
Relevância na Pesquisa
26.6%
OBJECTIVE: To identify the population-based drug databases in Canada and to determine their comprehensiveness and accessibility for performing pharmacoepidemiologic and outcomes research. DESIGN: Survey (four-part mailed questionnaire). SETTING: Public and private third-party drug plans across Canada. PARTICIPANTS: All provincial and territorial drug plan or pharmacare managers as well as selected private plan managers including health benefit consultants, group insurers and claims adjudicators/pharmacy benefit managers (CA/PBMs). OUTCOME MEASURES: Patient, drug and pharmacy information; potential for electronic linkages to other provincial databases (e.g., physician, hospital, vital statistics); accessibility of information; population profile. RESULTS: Of the 32 recipients of the questionnaire 29 (91%) responded and 18 (56%) completed the survey. Most databases were reported to contain patient information (e.g., patient identification number, age, sex and medication history) and prescription drug information (e.g., drug identification number, strength, quantity and cost). Six provinces and one territory reported the capability to link to other databases (e.g., hospital and physician databases). One CA/PBM reported some links to selected long-term disability data. All of the government databases except those in British Columbia and the Yukon Territory allowed use of the data for research purposes. Manitoba and Saskatchewan included all residents of the province in their database; the others included selected groups (e.g....

Hyperlink Management System and ID Converter System: enabling maintenance-free hyperlinks among major biological databases

Imanishi, Tadashi; Nakaoka, Hajime
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.6%
Hyperlink Management System (HMS) is a system for automatically updating and maintaining hyperlinks among major public databases in the field of life science. We daily create corresponding tables of data IDs of major databases for human genes and proteins, and provide a CGI-program that returns correct and up-to-date URLs for showing data of various databases that correspond to user-specified IDs. The HMS can deal with various IDs: accession numbers of International Nucleotide Sequence Databases, HUGO Gene Symbols and IDs of UniProt, PDB, H-InvDB and others, and it can return URLs of various databases: H-InvDB, HUGO Gene Nomenclature Committee Database, NCBI Entrez Gene, UniProt, PDB and others. For example, 23 297 pages of Locus view of H-InvDB are reachable by using HUGO Gene Symbols through the HMS. Not only the CGI-program, the HMS provides a Web page for finding and opening URLs of these databases. Although hyperlinking is an effective way of relating biological data among different databases, updating hyperlinks has been a laborious work. The HMS fully automates the job, enabling maintenance-free hyperlinks. We also developed the ID Converter System (ICS) for simply converting data IDs by using corresponding tables in the HMS. The HMS and ICS are freely available at http://biodb.jp/.

Searching for Controlled Trials of Complementary and Alternative Medicine: A Comparison of 15 Databases

Cogo, Elise; Sampson, Margaret; Ajiferuke, Isola; Manheimer, Eric; Campbell, Kaitryn; Daniel, Raymond; Moher, David
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.67%
This project aims to assess the utility of bibliographic databases beyond the three major ones (MEDLINE, EMBASE and Cochrane CENTRAL) for finding controlled trials of complementary and alternative medicine (CAM). Fifteen databases were searched to identify controlled clinical trials (CCTs) of CAM not also indexed in MEDLINE. Searches were conducted in May 2006 using the revised Cochrane highly sensitive search strategy (HSSS) and the PubMed CAM Subset. Yield of CAM trials per 100 records was determined, and databases were compared over a standardized period (2005). The Acudoc2 RCT, Acubriefs, Index to Chiropractic Literature (ICL) and Hom-Inform databases had the highest concentrations of non-MEDLINE records, with more than 100 non-MEDLINE records per 500. Other productive databases had ratios between 500 and 1500 records to 100 non-MEDLINE records—these were AMED, MANTIS, PsycINFO, CINAHL, Global Health and Alt HealthWatch. Five databases were found to be unproductive: AGRICOLA, CAIRSS, Datadiwan, Herb Research Foundation and IBIDS. Acudoc2 RCT yielded 100 CAM trials in the most recent 100 records screened. Acubriefs, AMED, Hom-Inform, MANTIS, PsycINFO and CINAHL had more than 25 CAM trials per 100 records screened. Global Health...

Conceptual framework and pilot study to benchmark phylogenomic databases based on reference gene trees

Boeckmann, Brigitte; Robinson-Rechavi, Marc; Xenarios, Ioannis; Dessimoz, Christophe
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.6%
Phylogenomic databases provide orthology predictions for species with fully sequenced genomes. Although the goal seems well-defined, the content of these databases differs greatly. Seven ortholog databases (Ensembl Compara, eggNOG, HOGENOM, InParanoid, OMA, OrthoDB, Panther) were compared on the basis of reference trees. For three well-conserved protein families, we observed a generally high specificity of orthology assignments for these databases. We show that differences in the completeness of predicted gene relationships and in the phylogenetic information are, for the great majority, not due to the methods used, but to differences in the underlying database concepts. According to our metrics, none of the databases provides a fully correct and comprehensive protein classification. Our results provide a framework for meaningful and systematic comparisons of phylogenomic databases. In the future, a sustainable set of ‘Gold standard’ phylogenetic trees could provide a robust method for phylogenomic databases to assess their current quality status, measure changes following new database releases and diagnose improvements subsequent to an upgrade of the analysis procedure.

Protein Databases on the Internet

Xu, Dong
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /11/2004 EN
Relevância na Pesquisa
26.62%
Protein databases have become a crucial part of modern biology. Huge amounts of data for protein structures, functions, and particularly sequences are being generated. Searching databases is often the first step in the study of a new protein. Comparison between proteins or between protein families provides information about the relationship between proteins within a genome or across different species, and hence offers much more information than can be obtained by studying only an isolated protein. In addition, secondary databases derived from experimental databases are also widely available. These databases reorganize and annotate the data or provide predictions. The use of multiple databases often helps researchers understand the structure and function of a protein. Although some protein databases are widely known, they are far from being fully utilized in the protein science community. This unit provides a starting point for readers to explore the potential of protein databases on the Internet.

A Survey of Metabolic Databases Emphasizing the MetaCyc Family

Karp, Peter D.; Caspi, Ron
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.6%
Thanks to the confluence of genome sequencing and bioinformatics, the number of metabolic databases has expanded from a handful in the mid 1990s to several thousand today. These databases lie within distinct families that have common ancestry and common attributes. The main families are the MetaCyc, KEGG, Reactome, Model SEED, and BiGG families. We survey these database families, as well as important individual metabolic databases, including multiple human metabolic databases. The MetaCyc family is described in particular detail. It contains well over 1,000 databases, including highly curated databases for Escherichia coli, Saccharamyces cerevisiae, Mus musculus, and Arabidopsis thaliana. These databases are available through a number of web sites that offer a range of software tools for querying and visualizing metabolic networks. These web sites also provide multiple tools for analysis of gene expression and metabolomics data, including visualization of those datasets on metabolic network diagrams, and overrepresentation analysis of gene sets and metabolite sets.

Systematic Reviews and Meta-Analyses of Traditional Chinese Medicine Must Search Chinese Databases to Reduce Language Bias

Wu, Xin-Yin; Tang, Jin-Ling; Mao, Chen; Yuan, Jin-Qiu; Qin, Ying; Chung, Vincent C. H.
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.65%
Systematic reviews (SRs) that fail to search non-English databases may miss relevant studies and cause selection bias. The bias may be particularly severe in SRs of traditional Chinese medicine (TCM) as most randomized controlled trials (RCT) in TCM are published and accessible only in Chinese. In this study we investigated how often Chinese databases were not searched in SRs of TCM, how many trials were missed, and whether a bias may occur if Chinese databases were not searched. We searched 5 databases in English and 3 in Chinese for RCTs of Chinese herbal medicine for coronary artery disease and found that 96.64% (115/119) eligible studies could be identified only from Chinese databases. In a random sample of 80 Cochrane reviews on TCM, we found that Chinese databases were only searched in 43 or 53.75%, in which almost all the included studies were identified from Chinese databases. We also compared SRs of the same topic and found that they may draw a different conclusion if Chinese databases were not searched. In conclusion, an overwhelmingly high percentage of eligible trials on TCM could only be identified in Chinese databases. Reviewers in TCM are suggested to search Chinese databases to reduce potential selection bias.

Glycoproteomic and glycomic databases

Baycin Hizal, Deniz; Wolozny, Daniel; Colao, Joseph; Jacobson, Elena; Tian, Yuan; Krag, Sharon S; Betenbaugh, Michael J; Zhang, Hui
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
Publicado em 13/04/2014 EN
Relevância na Pesquisa
26.62%
Protein glycosylation serves critical roles in the cellular and biological processes of many organisms. Aberrant glycosylation has been associated with many illnesses such as hereditary and chronic diseases like cancer, cardiovascular diseases, neurological disorders, and immunological disorders. Emerging mass spectrometry (MS) technologies that enable the high-throughput identification of glycoproteins and glycans have accelerated the analysis and made possible the creation of dynamic and expanding databases. Although glycosylation-related databases have been established by many laboratories and institutions, they are not yet widely known in the community. Our study reviews 15 different publicly available databases and identifies their key elements so that users can identify the most applicable platform for their analytical needs. These databases include biological information on the experimentally identified glycans and glycopeptides from various cells and organisms such as human, rat, mouse, fly and zebrafish. The features of these databases - 7 for glycoproteomic data, 6 for glycomic data, and 2 for glycan binding proteins are summarized including the enrichment techniques that are used for glycoproteome and glycan identification. Furthermore databases such as Unipep...

Information exchange between medical databases through automated identification of concept equivalence

Sun, Yao, 1962-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 148 p.; 13094524 bytes; 13094281 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
26.62%
The difficulty of exchanging information between heterogeneous medical databases remains one of the chief obstacles in achieving a unified patient medical record. Although methods have been developed to address differences in data formats, system software, and communication protocols, automated data exchange between disparate systems still remains an elusive goal. The Medical Information Acquisition and Transmission Enabler (MEDIATE) system identifies semantically equivalent concepts between databases to facilitate information exchange. MEDIATE employs a semantic network representation to model underlying native databases and to serve as an interface for database queries. This representation generates a semantic context for data concepts that can subsequently be exploited to perform automated concept matching between disparate databases. To test the feasibility of this system, medical laboratory databases from two different institutions were represented within MEDIATE and automated concept matching was performed. The experimental results show that concepts that existed in both laboratory databases were always correctly recognized as candidate matches.; (cont.) In addition, concepts which existed in only one database could often be matched with more "generalized" concepts in the other database that could still provide useful information. The architecture of MEDIATE offers advantages in system scalability and robustness. Since concept matching is performed automatically...

Landslide databases in Europe: analysis and recommendations for interoperability and harmonisation.

VAN DEN EECKHAUT MIET; HERVAS JAVIER; MONTANARELLA Luca
Fonte: Springer Publicador: Springer
Tipo: Contributions to Conferences Formato: Printed
ENG
Relevância na Pesquisa
26.68%
Landslide inventories, usually including digital inventory maps and linked alphanumeric attributes, are the most important input for further landslide zoning. However, to allow landslide susceptibility, hazard and risk assessment the inventory databases should contain information on the location of landslide phenomena, types, history, state of activity, magnitude or size, causal factors and the damage caused. Yet, in Europe it is not known which national (or regional) landslide databases contain all this information, and thus allow landslide risk assessment. Therefore this study presents a review of existing national landslide databases in Europe together with a number of regional databases, and proposes improvements in agreement with the EU Soil Thematic Strategy, and with INSPIRE Directive. Replies received to a detailed questionnaire learned that currently 22 out of 37 contacted European countries have a national landslide database. Six other countries only have regional databases. In total the databases contain so far more than 642,000 landslides. About half of the databases contain less than 50 % of all landslides in the country and also information on landslide history, triggering factor and consequences is generally only available for less than 25 % of the landslides in the databases. A positive observation is that 60% of the databases are updated at least once a year or after a major event. The spatial data are almost always collected with traditional methods such as field surveys...

Towards semantic and affective coupling in emotionally annotated databases

Horvat, Marko; Popović, Siniša; Ćosić, Krešimir
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 01/12/2012
Relevância na Pesquisa
26.62%
Emotionally annotated databases are repositories of multimedia documents with annotated affective content that elicit emotional responses in exposed human subjects. They are primarily used in research of human emotions, attention and development of stress-related mental disorders. This can be successfully exploited in larger processes like selection, evaluation and training of personnel for occupations involving high stress levels. Emotionally annotated databases are also used in multimodal affective user interfaces to facilitate richer and more intuitive human-computer interaction. Multimedia documents in emotionally annotated databases must have maximum personal ego relevance to be the most effective in all these applications. For this reason flexible construction of subject-specific of emotionally annotated databases is imperative. But current construction process is lengthy and labor intensive because it inherently includes an elaborate tagging experiment involving a team of human experts. This is unacceptable since the creation of new databases or modification of the existing ones becomes slow and difficult. We identify a positive correlation between the affect and semantics in the existing emotionally annotated databases and propose to exploit this feature with an interactive relevance feedback for a more efficient construction of emotionally annotated databases. Automatic estimation of affective annotations from existing semantics enhanced with information refinement processes may lead to an efficient construction of high-quality emotionally annotated databases.; Comment: 6 pages...

An Ehrenfeucht-Fraisse Game Approach to Collapse Results in Database Theory

Schweikardt, Nicole
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 20/12/2002
Relevância na Pesquisa
26.62%
We present a new Ehrenfeucht-Fraisse game approach to collapse results in database theory and we show that, in principle, this approach suffices to prove every natural generic collapse result. Following this approach we can deal with certain infinite databases where previous, highly involved methods fail. We prove the natural generic collapse for Z-embeddable databases over any linearly ordered context structure with arbitrary monadic predicates, and for N-embeddable databases over the context structure (R,<,+,Mon_Q,Groups). Here, N, Z, R, denote the sets of natural numbers, integers, and real numbers, respectively. Groups is the collection of all subgroups of (R,+) that contain Z, and Mon_Q is the collection of all subsets of a particular infinite subset Q of N. Restricting the complexity of the formulas that may be used to formulate queries to Boolean combinations of purely existential first-order formulas, we even obtain the collapse for N-embeddable databases over any linearly ordered context structure with arbitrary predicates. Finally, we develop the notion of N-representable databases, which is a natural generalization of the classical notion of finitely representable databases. We show that natural generic collapse results for N-embeddable databases can be lifted to the larger class of N-representable databases. To obtain...

Future Outlook for Databases from the Perspective of Bioresources Databases

Yukiko Yamazaki
Fonte: Nature Preceedings Publicador: Nature Preceedings
Tipo: Conferência ou Objeto de Conferência
Relevância na Pesquisa
26.67%
Databases, like journals, are now an essential component of our research activities. However, the maintenance of databases and the timely, accurate, and complete incorporation into them of the wealth of data being created daily through scientific activities represent a difficult problem. I have been working on bioresources databases and come to appreciate the need for closer links between journals and databases to improve the scientific value of databases. For example, it is frequently difficult to identify experimental materials from articles in journals. In experimental science, it is vital that one scientist’s experiments are readily reproducible by others; this requires an environment that provides other scientists with ready access to identical experimental materials. This could become possible if journal requires a database address and/or an idendifier of the material as a prerequisite of publication. There are also problems in the maintenance and management of gene lists. I believe that a dramatic improvement in this field would also be possible if database submission system were established in cooperation with journals, databases and communities. In another regard, I have high expectations for ontology to make efficient use of databases. Bioresources databases deal with various biological species...

An assessment of the information content of South African alien species databases

Faulkner,Katelyn T.; Spear,Dian; Robertson,Mark P.; Rouget,Mathieu; Wilson,John R.U.
Fonte: Bothalia - African Biodiversity & Conservation Publicador: Bothalia - African Biodiversity & Conservation
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2015 EN
Relevância na Pesquisa
26.65%
National alien species databases indicate the state of a country's biodiversity and provide useful data for research on invasion biology and the management of invasions. In South Africa there are several different published alien species databases, but these databases were created for different purposes and vary in completeness and information content. We assessed the information content of published South African alien species databases in the context of other such databases globally, and evaluated how the information content of South African databases varies across taxonomic groups. Although introduction pathway, date of introduction, region of origin and current broad-scale distribution data are available for most taxonomic groups assessed (60% - 90%), data on invasion status, introduction effort and introduction source are available for few taxonomic groups (5% - 18%). South African alien species databases have lower information content than the detailed databases available in other parts of the world and thus cannot be utilised to the same extent. We conclude with 11 recommendations for improving South African alien species databases. In particular, we highlight the data types that should be incorporated in future databases and argue that existing data should be collated in a single...