Browsing by Autor "Christoph Nowicki"

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    Ecology, biogeography and diversity of the Bolivian epiphytic cacti — with the description of two new taxa
    (2000) Pierre L. Ibisch; Michael Kessler; Christoph Nowicki; Wilhelm Barthlott
    We provide an overview of the taxonomy, ecology, and biogeography of the epiphytic cacti of Bolivia, which is second only to southeastern Brazil as a centre of epiphytic cactus diversity in South America. Twenty-one obligatory or facultative epiphytic species with 2 varieties in 7 genera occur in Bolivia. A further 14 species in 6 normally terrestrial genera are recorded as accidental epiphytes. Two taxa are described as new: Lepismium asuntapatense sp. nov. M. Kessler, P.L. Ibisch & Barthlott and Rhipsalis baccifera ssp. nov. cleistogama M. Kessler, P.L. Ibisch & Barthlott. Eight species are endemic to Bolivia, mostly in humid montane forests. Preliminary ecograms and extrapolated range maps for all obligatory epiphytes are provided. GIS-overlay of the range maps is used to predict the species diversity patterns for all obligatory epiphytes and for the genera of Rhipsalideae. Species-richness is highest in humid montane forests, but physiognomically and in relation to overall species-richness of vascular epiphytes, epiphytic cacti are most important in semi-humid montane forests of inter-Andean valleys and the Chaco zone. Three species are classified as vulnerable and all others as not endangered.
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    Nature conservation: priority-setting needs a global change
    (Springer Science+Business Media, 2013) Lisa Biber‐Freudenberger; P. R. Hobson; Martin Schluck; Stefan Kreft; Katrin Vohland; Henning Sommer; Steffen Reichle; Christoph Nowicki; Wilhelm Barthlott; Pierre L. Ibisch
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    Taxonomy and Biology of Andean Velloziaceae: Vellozia andina sp. nov. and Notes on Barbaceniopsis (including Barbaceniopsis castillonii comb. nov.)
    (BioOne, 2009) Pierre L. Ibisch; Christoph Nowicki; Roberto Vásquez; Kerstin Koch
    Abstract All published information on the Andean Velloziaceae is summarized and augmented by our own data obtained by revision of herbarium material, studies of cultivated plants and observations in the field. A new species from the central Andes within the department of Santa Cruz, Bolivia, is described and illustrated. Vellozia andina sp. nov. is distinguished by, among other characteristics, short, stout and trigonous stems and by the irregular pollen aggregates of more than eight grains. Habitat and ecology of the new taxon are described. This first Andean record considerably amplifies the known range of the genus Vellozia. The new species is a poikilohydrous and poikilochlorophyllous resurrection plant. Within the exclusively Andean genus Barbaceniopsis four species are recognized. Barbaceniopsis castillonii comb. nov., found in southern Bolivia and northern Argentina, with blue-violet and triangular-acute tepals forming a hypanthium, is differentiated from B. boliviensis, which has white, shorter, rather obtuse tepals and a shorter hypanthium. For both taxa new biological information and illustrations are provided. A distribution map and an identification key for all Andean Velloziaceae are presented. Communicating Editor: John V. Freudenstein