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Um die Biodiversität Burkina Fasos darzustellen und auszuwerten, wurden umfangreiche Diversitätsdaten aus Sammlungsbelegen, Vegetationsaufnahmen und Literatur zusammengestellt. Die eigene Datenerhebung während dreier Feldaufenthalte hat mit > 300 Vegetationsaufnahmen (einschließlich der Biodiversitätsobservatorien) und > 1200 Herbarbelegen dazu beigetragen. Die Verwendung von relationalen Datenbanken (Microsoft Access) und GIS ermöglichte eine umfassende Analyse dieser enormen Datenmengen (> 100 000 Verbreitungspunkte) unter Einbeziehung von weiteren Art- oder ortsgebundenen Informationen. Datenbankstrukturen und Prozeduren wurden zu einem großen Teil selbst entwickelt. Unregelmäßigkeiten in den Primärdaten konnten durch Artverbreitungsmodelle ausgeglichen werden, die rasterbasierte Umweltdaten verwenden, insbesondere Satellitenbilder, Klima- und Höhendaten. Für die zusammenfassenden Analysen (Artenreichtum nach Familie, Lebensform, Photosynthesetyp; turnover) mussten wiederum eigene Prozeduren entwickelt werden. Räumliche Muster der Biodiversität wurden im landesweiten Rahmen, wie auch lokal für die Regionen Oudalan und Gourma, dargestellt. Die Zusammenfassung der Flora nach taxonomischen und ökologischen Gruppen gewährt dabei Einblicke in ökologische Zusammenhänge und die Eignung einzelner Gruppen als Indikatoren. Deutlich zeigen sich die Veränderungen des Lebensformspektrums und des Artenreichtums sowohl auf Landesebene im Zusammenhang mit dem Makroklima als auch in einer detaillierten Analyse des Oudalan – wo der Einfluss von Boden und Relief deutlich wird. Die großräumigen Muster der Artenvielfalt sind hauptsächlich durch klimatische Faktoren geprägt, auch der menschliche Einfluss ist in Form verschiedener Nutzungsformen vom Klima abhängig und schwer davon zu trennen. Umso deutlicher werden die Folgen intensiver Landnutzung aber in den Detailstudien der nordsudanischen Biodiversitätsobservatorien und des sahelischen Wiederbegrünungsprojektes. Über die in diesem Rahmen dargestellten Ergebnisse hinaus ergeben sich insbesondere aus der umfassenden Datenbasis und der interdisziplinären Zusammenarbeit mit Fernerkundung und Ethnobotanik weitere vielversprechende Möglichkeiten. Unter anderem wird auf der Grundlage der Datenbanken und ergänzender Literaturrecherchen eine aktualisierte Checklist der Gefäßpflanzen Burkina Fasos erstellt und eine Revision der phytogeographischen Zonen für Burkina Faso ist geplant.
Plants, fungi and algae are important components of global biodiversity and are fundamental to all ecosystems. They are the basis for human well-being, providing food, materials and medicines. Specimens of all three groups of organisms are accommodated in herbaria, where they are commonly referred to as botanical specimens.The large number of specimens in herbaria provides an ample, permanent and continuously improving knowledge base on these organisms and an indispensable source for the analysis of the distribution of species in space and time critical for current and future research relating to global biodiversity. In order to make full use of this resource, a research infrastructure has to be built that grants comprehensive and free access to the information in herbaria and botanical collections in general. This can be achieved through digitization of the botanical objects and associated data.The botanical research community can count on a long-standing tradition of collaboration among institutions and individuals. It agreed on data standards and standard services even before the advent of computerization and information networking, an example being the Index Herbariorum as a global registry of herbaria helping towards the unique identification of specimens cited in the literature.In the spirit of this collaborative history, 51 representatives from 30 institutions advocate to start the digitization of botanical collections with the overall wall-to-wall digitization of the flat objects stored in German herbaria. Germany has 70 herbaria holding almost 23 million specimens according to a national survey carried out in 2019. 87% of these specimens are not yet digitized. Experiences from other countries like France, the Netherlands, Finland, the US and Australia show that herbaria can be comprehensively and cost-efficiently digitized in a relatively short time due to established workflows and protocols for the high-throughput digitization of flat objects.Most of the herbaria are part of a university (34), fewer belong to municipal museums (10) or state museums (8), six herbaria belong to institutions also supported by federal funds such as Leibniz institutes, and four belong to non-governmental organizations. A common data infrastructure must therefore integrate different kinds of institutions.Making full use of the data gained by digitization requires the set-up of a digital infrastructure for storage, archiving, content indexing and networking as well as standardized access for the scientific use of digital objects. A standards-based portfolio of technical components has already been developed and successfully tested by the Biodiversity Informatics Community over the last two decades, comprising among others access protocols, collection databases, portals, tools for semantic enrichment and annotation, international networking, storage and archiving in accordance with international standards. This was achieved through the funding by national and international programs and initiatives, which also paved the road for the German contribution to the Global Biodiversity Information Facility (GBIF).Herbaria constitute a large part of the German botanical collections that also comprise living collections in botanical gardens and seed banks, DNA- and tissue samples, specimens preserved in fluids or on microscope slides and more. Once the herbaria are digitized, these resources can be integrated, adding to the value of the overall research infrastructure. The community has agreed on tasks that are shared between the herbaria, as the German GBIF model already successfully demonstrates.We have compiled nine scientific use cases of immediate societal relevance for an integrated infrastructure of botanical collections. They address accelerated biodiversity discovery and research, biomonitoring and conservation planning, biodiversity modelling, the generation of trait information, automated image recognition by artificial intelligence, automated pathogen detection, contextualization by interlinking objects, enabling provenance research, as well as education, outreach and citizen science.We propose to start this initiative now in order to valorize German botanical collections as a vital part of a worldwide biodiversity data pool.
Bare incrusted soils are a degradation stage often encountered in the Sahel zone. Our study documents the success of restoration (= regreening) experiments using deep ploughing in an experimental site south of Gorom-Gorom in the Oudalan province of Burkina Faso. We used phytosociological relevés and maximum likelihood classifications of digital photography to analyze changes in vegetation. Plant cover in treated plots was found to be about 20 times higher than in control plots, mean species richness more than twice as high. Therefore, this promising restoration method should be tested also in other Sahelian regions. Our approach to combine phytosociological relevés and maximum likelihood classifications of digital photography proved to be very useful.
Biodiversity research heavily relies on recent and older literature, and the data contained therein. Despite great effort, large parts of the literature and the data it holds are still not available in appropriate formats needed for efficient compilation and analysis. As a part of the current funding strategy of the German Research Council (Deutsche Forschungsgemeinschaft, DFG), and resulting from an extensive dialogue with the scientific community in Germany, a "Specialised Information Service" (Fachinformationsdienst, FID) for Biodiversity Research will be established with the objective of making further segments of literature about biodiversity available in up-to-date formats. This project, starting 2017, is conducted by the University Library Johann Christian Senckenberg (Frankfurt/Main, Germany) together with the Senckenberg Gesellschaft für Naturforschung and the Text Technology Lab of the Goethe University (Frankfurt/Main).
The new Specialised Information Service for Biodiversity Research (FID Biodiversitätsforschung) comprises four core elements: (A) A text mining approach which encompasses advanced text technologies and a large body of 20th century literature; (B) the digitisation of selected German biodiversity literature; (C) a platform für Open Access journals; and (D) Acquisition of specialised print literature.