Alexandra Kehl- University of Tübingen
Alexandra Kehl
- University of Tübingen
About
23
Publications
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Introduction
Current institution
Publications
Publications (23)
Whereas temporal variability of plant phenology in response to climate change has already been well studied, the spatial variability of phenology is not well understood. Given that phenological shifts may affect biotic interactions, there is a need to investigate how the variability in environmental factors relates to the spatial variability in her...
Whereas temporal variability of plant phenology in response to climate change has already been well studied, the spatial variability of phenology is not well understood. Given that phenological shifts may affect the magnitude of biotic interactions, there is a need to investigate how the variability in environmental factors relates to the spatial v...
Positionspapier Botanische Gärten und Kolonialismus
Urbanisation is one of the major drivers of global species extinction. Botanical gardens, being diverse green oases in urban landscapes, have a
high potential as refuge areas for wild species. How many and which organisms use the gardens as secondary habitats has been little studied.
Twenty botanical gardens in Germany, Austria and Switzerland part...
In this study, relevant variables were determined to predict the probability of sooty mould biofilm (SMB) occurrence on willow leaves in a multivariate model. Despite a large temporal gap between the main sap-feeding insect (SFI) season in spring (May to June) and the main season of SMBs in late summer and fall (August to September), trees infested...
Many botanic gardens keep ex-situ collections of rare species to prevent their extinction and to enable their reintroduction into the wild. A potential problem with ex-situ collections is that relaxed selection, genetic drift, novel selection and inbreeding may cause rapid loss of adaptation to natural conditions and therefore may hamper success of...
Sonderheft zur Ausstellung (Softcover, erhältlich über den Palmengarten Frankfurt a.M.) - Spannendes zur Biologie und zum Anbau des Kakaos, seine historische Verwendung in vorkolumbianischer Zeit, den Siegeszug der Schokolade in Europa sowie die heutigen Herstellungsmethoden vom Kakaobaum bis zur Schokolade. Interessant ist auch, wie Kakao in Mediz...
Knoppern entwickeln sich auf den Eicheln von Stiel-Eichen (Quercus robur). Sie werden durch Gallwespen (Andricus quercuscalicis) verursacht. Diese kleine Gallwespe hat einen komplizierten Lebenszyklus, der die Anwesenheit von zwei Eichenarten erfordert, nämlich der Stiel- und der Zerr-Eiche (Quercus robur, Q. cerris). Das Insekt bildet abwechselnd...
Restriction fragment length polymorphism tools is an R application which supports a complete workflow of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), dealing with the problems which accompany analysis when PCR-RFLP is used in diversity studies. Large numbers of different RFLP samples obtained from multiple electrop...
The host taxon preference of Pontania proxima (Serville 1823) (Tenthredinidae, Hymenoptera) was investigated by observing densities of galls on previously genotypically
and phenotypically characterized clones representing three taxa of a hybrid complex, i.e., Salix alba, Salix×rubens, and Salix fragilis. Gall densities among these three taxa were o...
Gentianella bohemica wird seit 2004 zur Arterhaltung und für Wiederansiedelungsprojekte im Ökologisch-Botanischen-Garten der Universität Bayreuth (ÖBG) kultiviert. Wie frühere Stu- dien zeigten sind Pflanzen in Kultur im Gegensatz zu denjenigen am Naturstandort nicht my- korrhiziert. Es wird angenommen, dass der Böhmische Fransenenzian wie die ganz...
Though it is known that flower scent not only attracts pollinators but also herbivores, little is known about the importance
of flower scent on the distribution of leaf herbivores among individuals within a plant species. In this study we determined
the distribution of galls induced by the sawfly Pontania proxima (Serville 1823) (Hymenoptera, Tenth...
The project is based on the development of the Diversity Workbench framework (www.diversityworkbench.net) and will expand the platform by the software application DiversityMobile for handheld devices or smartphones. The approach is to gain biological research data from the field by using mobile devices with GPS functionality and a digital imagery o...
A majority of biodiversity research projects depend on field recording and ecology data. Therefore it is important to provide a seamless and transparent data flow from the field to the data storage systems and networks. Seamless in the sense, that data are available shortly after their gathering, transparent in the sense that the history of data op...
Most studies on Salix hybrids concerning the diversity in a hybrid complex included typical morphological characteristics of leaves, buds, twigs
and flowers for comparison with genotypic traits. Our analyses are based on a set of phenotypical traits of 19 clones of the S. alba/S. fragilis-aggregate which includes characteristics as phenology, growt...
Great Burnet, Sanguisorba officinalis L. (Rosaceae), is the previously unknown larval host plant of the sawfly Empria testaceipes (Konow, 1896) (Tenthredinidae: Allantinae).We report here that young, endophagous larvae inhabit galls in the leaves, while later instars are external feeders on leaves. This is the first report
of a gall-inducing habit...
Abstrakt: Počas deviateho medzinárodného pracovného stretnutia špecialistov na hrubopáse blanokrídlovce (Hymenoptera, Symphyta) v júni 2005 bol vykonaný faunistický prieskum hrubopásych na viacerých lokalitách Národného parku Nízke Tatry. Celkovo bolo zaznamenaných 200 druhov a osem čeľadí hrubopásych. Ďalších dvanásť taxónov nebolo identifikovanýc...
