Fatty acid patterns during development of some therophytes from the plains near Kabul (Afghanistan)

Über das Verhalten der Fettsäuren der verseifbaren Lipide während des ganzen Entwicklungsganges von Therophyten sind uns keine Untersuchungen bekannt geworden, obwohl bei solchen Arten die Veränderungen im Stoffwechselgeschehen in kurzer Zeit ablaufen. Wir haben die Fettsäurezusammensetzung der Lipidfraktion aus den drei Arten Diarthron vesiculosum, Scabiosa olivieri und Ziziphora tenuoi L. während deren Entwicklung von Anfang Mai bis Ende Juni analysiert. Das bereits bezüglich der morphologischen Parameter und der osmotischen Verhältnisse und hinsichtlich der Mineralstoffe und verschiedener organischer Inhaltsstoffe untersuchte Material der drei Therophytenarten aus der Steppe von Kabul bot sich zu derartigen Messungen an, zumal sich die Rohlipidfraktion bei den drei Arten unterschiedlich verhielt.The fatty acid composition of the saponifiable lipids of three therophytes Diarthron vesiculosum, Scabiosa olivieri, and Ziziphora tenuior from the plains near Kabul were investigated during development of the plants from the beginning of May until the end of June. In all three species, linolenic acid and hexadecenic acid contents decreased with increasing age. Ziziphora exhibited greatest irregularities of fatty acid pattern. This species succumbs most rapidly with the onset of drought in June. Scabiosa had a high lipid content and the most balanced fatty acid pattern; this species is also more drought tolerant. This ecological advantage is discussed in relation to lipid metabolism. Diarthron was intermediate between the two species in these characteristics

Preserving a Comprehensive Vegetation Knowledge Base - An Evaluation of Four Historical Soviet Vegetation Maps of the Western Pamirs (Tajikistan)

Vanselow KA, Samimi C, Breckle S-W. Preserving a Comprehensive Vegetation Knowledge Base - An Evaluation of Four Historical Soviet Vegetation Maps of the Western Pamirs (Tajikistan). PLOS ONE. 2016;11(2): e0148930.We edited, redrew, and evaluated four unpublished historical vegetation maps of the Western Pamirs (Tajikistan) by the Soviet geobotanist Okmir E. Agakhanjanz. These maps cover an area of 5,188 km(2) and date from 1958 to 1960. The purpose of this article is to make the historic vegetation data available to the scientific community and thus preserve a hitherto non available and up to now neglected or forgotten data source with great potential for studies on vegetation and ecosystem response to global change. The original hand-drawn maps were scanned, georeferenced, and digitized and the corresponding land cover class was assigned to each polygon. The partly differing legends were harmonized and plant names updated. Furthermore, a digital elevation model and generalized additive models were used to calculate response curves of the land cover classes and to explore vegetation-topography relationships quantitatively. In total, 2,216 polygons belonging to 13 major land cover classes were included that are characterized by 252 different plant species. As such, the presented maps provide excellent comparison data for studies on vegetation and ecosystem change in an area that is deemed to be an important water tower in Central Asia

Natur und Landnutzung in Pamir: Wie sind Erhalt der Biodiversität, Naturschutz und nachhaltige Landnutzung im Pamirgebirge in Einklang zu bringen?

Breckle S-W, ed. Natur und Landnutzung in Pamir: Wie sind Erhalt der Biodiversität, Naturschutz und nachhaltige Landnutzung im Pamirgebirge in Einklang zu bringen? Bielefelder ökologische Beiträge. 2003;18:104

Distribution and ecology of Cystopteris (Athyriaceae) species within the Flora Iranica region

Breckle S-W. Distribution and ecology of Cystopteris (Athyriaceae) species within the Flora Iranica region. Plant Systematics and Evolution. 1987;155(1-4):59-65

Studies on halophytes from Iran and Afghanistan. II: Ecology of halophytes along salt gradients

Breckle S-W. Studies on halophytes from Iran and Afghanistan. II: Ecology of halophytes along salt gradients. Proceedings of the Royal Society of Edinburgh. Section B: Biological Sciences. 1986;89:203-215

MAPPING GEOMORPHOLOGY AND TRAILS AROUND THE BIOLOGICAL STATION AT THE RESERVA BIOLOGICA ALBERTO BRENES (SIERRA DE TILARAN), COSTA RICA

In thc last ycars several research projects werr started to elucidate structure, dynamics and diversity of the primary premontane forest at the Reserva Biológica Alberto Brenes (RBAB). The Biological Station steadily was improved and is more and more a very useful base for research in tropical ecology (Ortiz 1991)

Accumulation of Nitrate in Bladder Hairs of Atriplex Species

Freitas H, Breckle S-W. Accumulation of Nitrate in Bladder Hairs of Atriplex Species. Plant physiology and biochemistry. 1993;31(6):887-892.Plants of Atriplex littoralis L. and Atriplex calotheca (Rafn.). Fries were grown under sodium nitrate and sodium chloride salinity. Concentrations of Na+, K+, Cl-, and NO3- were investigated in leaves and bladder hairs harvested from young leaves. The content of ions in bladder hairs was correlated with concentrations in young leaves. Na+ and Cl- concentrations were higher in bladders than in leaves. Accumulation of nitrate in tissues and bladders was observed in plants grown under nitrate salinity. This suggests that in the absence of chloride, nitrate may have an osmotic role

Climatic Conditions in the Aralkum

Breckle S-W, Wucherer W. Climatic Conditions in the Aralkum. In: Breckle S-W, Wucherer W, Dimeyeva LA, Ogar NP, eds. Aralkum - A Man-Made Desert: The Desiccated Floor Of The Aral Sea (Central Asia). Ecological Studies-Analysis and Synthesis. Vol 218. New York: Springer; 2012: 49-72

Cadmium in Oak Tree-Rings - Investigations on a Chronology of the Immissions

Hagemeyer J, Breckle S-W. Cadmium in den Jahrringen von Eichen: Untersuchungen zur Aufstellung einer Chronologie der Immissionen. Angewandte Botanik. 1986;60(3-4):161-174

The Aralkum, a Man-Made Desert on the Desiccated Floor of the Aral Sea (Central Asia): General Introduction and Aims of the Book

Breckle S-W, Wucherer W. The Aralkum, a Man-Made Desert on the Desiccated Floor of the Aral Sea (Central Asia): General Introduction and Aims of the Book. In: Breckle S-W, Wucherer W, Dimeyeva LA, Ogar NP, eds. Aralkum - A Man-Made Desert: The Desiccated Floor Of The Aral Sea (Central Asia). Ecological Studies-Analysis and Synthesis. Vol 218. New York: Springer; 2012: 1-9