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Fredag den 12. september blev Væksthusene indviet efter flere års ombygning

Taxonomic novelties in aiphanes (palmae) from colombia and venezuela

Two new species of Aiphanes from Colombia, Aiphanes buenaventurae and Aiphanes multiplex, are described and illustrated. Two other species, Aiphanes killipii and Aiphanes concinna, previously included in synonymy under Aiphanes horrida,and Aiphanes lindeniana, respectively, are restored. Aiphanes stergiosii described from Venezuela is included in synonymy under Aiphanes lindeniana. An epitype is designated for Aiphanes simplex

Herbarium Jutlandicum

Science and Technology Museerne ved Aarhus Universitet (Steno Museet, Væksthusene og Ole Rømer-Observatoriet) er netop blevet udvidet med universitetets herbarium

Genomic islands of divergence in hybridizing Heliconius butterflies identified by large-scale targeted sequencing

This article presents an inventory of South American palms including 457 species and 50 genera. The distribution of palms within seven phytogeographical entities is analyzed. Factors which influence the evolution of palms in South America are discussed.Este artículo presenta un inventario de la flora de palmeras autóctonas de Suramérica, conformada por 457 especies y 50 géneros. Se analiza la distribución de este grupo vegetal en siete entidades fitogeográficas y se discuten los principales factores que influyen sobre la evolución de las palmeras en América del Sur

Det går fremad i væksthusene

Væksthusene i Botanisk Have har været under renovering siden 2010. Væksthusenes gamle stålkonstruktioner er blevet restaureret, husene har fået nye vinduer, nyt varmeanlæg, nyt befugtnings-anlæg, og der er bygget et stort nyt tropehus. Det gamle tropehus er ved at blive indrettet til formidlingshus og café

TAXONOMIC NOVELTIES IN AIPHANES (PALMAE) FROM COLOMBIA AND VENEZUELA

Two new species of Aiphanes from Colombia, Aiphanes buenaventurae and Aiphanes multiplex, are described and illustrated. Two other species, Aiphanes killipii and Aiphanes concinna, previously included in synonymy under Aiphanes horrida,and Aiphanes lindeniana, respectively, are restored. Aiphanes stergiosii described from Venezuela is included in synonymy under Aiphanes lindeniana. An epitype is designated for Aiphanes simplex

Reproductive isolation of sympatric forms of the understorey palm Geonoma macrostachys in western Amazonia

The evolution of a mechanism for attaining reproductive isolation between two diverging populations is a key step in the speciation process. We studied phenotypic variation, genetic differentiation, spatial distribution and reproductive ecology in two sympatric forms of the understorey palm Geonoma macrostachys in lowland tropical rainforest in Amazonian Ecuador. The two forms were morphologically and genetically distinct and differed in habitat preference, with one form being confined to moist flood plain habitats and the other occurring in terra firme and flood plain. Pollen transfer between the two forms was limited, but not totally prevented, by differences in flowering time, with flowers of the small form opening 2–3 h earlier than those of the large form. Differences in floral scent probably reduce the number of shared pollinators. A crossing experiment showed that pistillate flowers of either form produced fruit with pollen from the other form. We conclude that flowering biology may be a key factor in causing reproductive isolation between these closely related sympatric taxa

Marantaceae in the Philippines

The Marantaceae are represented in the Philippines by 2 genera, Donax and Phrynium with 8 native species of which 3 are endemic and three near-endemic. All species are poorly documented in the literature and the most contemporary taxonomic treatments are more than 80 years old. We provide an up to date taxonomic treatment of the Philippine Marantaceae including a key to the species, morphological descriptions, and notes on their distribution, vernacular names, ecology and uses. Three species are lectotypified; two species is neotypified, and one new combination is made

Climate-change-induced range shifts of three allergenic ragweeds (Ambrosia L.) in Europe and their potential impact on human health

Invasive allergenic plant species may have severe health-related impacts. In this study we aim to predict the effects of climate change on the distribution of three allergenic ragweed species (Ambrosia spp.) in Europe and discuss the potential associated health impact. We built species distribution models based on presence-only data for three ragweed species, using MAXENT software. Future climatic habitat suitability was modeled under two IPCC climate change scenarios (RCP 6.0 and RCP 8.5). We quantify the extent of the increase in ‘high allergy risk’ (HAR) areas, i.e., parts of Europe with climatic conditions corresponding to the highest quartile (25%) of present day habitat suitability for each of the three species. We estimate that by year 2100, the distribution range of all three ragweed species increases towards Northern and Eastern Europe under all climate scenarios. HAR areas will expand in Europe by 27–100%, depending on species and climate scenario. Novel HAR areas will occur mostly in Denmark, France, Germany, Russia and the Baltic countries, and overlap with densely populated cities such as Paris and St. Petersburg. We conclude that areas in Europe affected by severe ragweed associated allergy problems are likely to increase substantially by year 2100, affecting millions of people. To avoid this, management strategies must be developed that restrict ragweed dispersal and establishment of new populations. Precautionary efforts should limit the spread of ragweed seeds and reduce existing populations. Only by applying cross-countries management plans can managers mitigate future health risks and economical consequences of a ragweed expansion in Europe