ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Electronic Resource

Differences in the eutrophication dynamics of Ammersee and Starnberger See (Southern Germany), reflected by the diatom succession in varve-dated sediments (1999)

Alefs, Joachim ; Müller, Jens

Springer

Journal of paleolimnology 21 (1999), S. 395-407

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ISSN: 1573-0417

Keywords: varves ; diatoms ; eutrophication dynamics ; Amersee ; Starnberger See

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Geosciences

Notes: Abstract Diatom assemblages in the annually laminated sediments of two neighboring, pre-alpine lakes (Ammersee and Starnberger See, Southern Germany) were analyzed and compared year by year. Within both varve records of the last decades, the same 4-phase-succession of planktonic diatom species is preserved, consisting of 1. a dominance of Cyclotella species 2. assemblages of Fragilaria crotonensis, Asterionella formosa and Stephanodiscus minutulus 3. a mass bloom of Aulacoseira islandica, and 4. a dominance of Stephanodiscus species. This diatom sequence is considered as a model of a 'basic species sequence of eutrophication'. Time lags and differences in the duration of the phases between both lakes show evidence of an earlier start for nutrient loading in Starnberger See than in Ammersee, and a faster development to a higher trophic state level in the latter. The different reactions of the lakes are attributed to hydrological differences such as the existence or lack of a major tributary, the size of the catchment area, and the water residence time. The reconstruction of the eutrophication dynamics appears to be reliably hindcast by the inference of total phosphorus (TP) concentrations using weighted averaging regression and calibration techniques. Remarkable differences in the occurrence of some diatoms in both stratigraphies, which are not related to the general changes of the 'basic species sequence of eutrophication' model, may be due to the epilimnetic silica content (e.g. Fragilaria crotonensis) or competitive weaknesses (e.g. Tabellaria flocculosa).

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1008098118867

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2

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Quaternary geology of the Amazonian Lowland (1995)

Irion, Georg ; Müller, Jens ; Nunes de Mello, Jose ; [et al.]

Springer

Geo-marine letters 15 (1995), S. 172-178

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ISSN: 1432-1157

Source: Springer Online Journal Archives 1860-2000

Topics: Geosciences

Notes: Abstract The Quaternary history of the Amazon lowlands is characterized by deposition of sediments of Andean provenance and by the influences of changing sea levels. Areas well above the present water tables were not reached by Pleistocene high-water stages. These areas have been intensively weathered since the Tertiary, forming hard lateritic weathering horizons. These weathering horizons are best explained by the relatively constant, humid tropical climate throughout the Quaternary. In the western Amazonian Lowland, flood plains corresponding to the different Pleistocene sea-level heights were formed. During low sea level, erosion in the drainage areas increased and the water levels of the central Amazon River system were lowered. Valleys drowned and lakes formed in the lower reaches of rivers and creeks during high sea-level stages. These lakes (ria lakes) remained in the valleys with rivers having a low sediment load. Seismic profiling (3.5 kHz) in some of these lakes clearly showed deposits of the three last periods of Quaternary high sea-level stages.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01204460

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3

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A novel 5′-upstream mutation in the factor X11 gene is associated with a Taql restriction site in an Alu repeat in factor X11-deficient patients (1996)

Hofferbert, Sigrun ; Müller, Jens ; Köstering, Heinz ; [et al.]

Springer

Human genetics 〈Berlin〉 97 (1996), S. 838-841

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ISSN: 1432-1203

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Abstract The factor XII gene from factor XII-deficient patients was screened for mutations at the genomic level. In patients negative for cross-reacting material, a T to C transition 224 by upstream of exon 3 was identified (exon 3–224 (T→C)) that creates an additionalTaqI restriction site in intron B. This mutation is located within a putative hormone responsive element and within a B box promoter of an Alu repeat of the Sb0 family. TheTaqI site is associated with a G to C transversion upstream of the transcription initiation site (exon 1–8 (G→C)). We discuss the possible roles of these elements in factor XII gene regulation.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02346200

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4

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A novel 5′-upstream mutation in the factor XII gene is associated with a TaqI restriction site in an Alu repeat in factor XII-deficient patients (1996)

Hofferbert, Sigrun ; Müller, Jens ; Köstering, Heinz ; [et al.]

Springer

Human genetics 〈Berlin〉 97 (1996), S. 838-841

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ISSN: 1432-1203

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Abstract The factor XII gene from factor XII-deficient patients was screened for mutations at the genomic level. In patients negative for cross-reacting material, a T to C transition 224 bp upstream of exon 3 was identified (exon 3–224 (T→C)) that creates an additional TaqI restriction site in intron B. This mutation is located within a putative hormone responsive element and within a B box promoter of an Alu repeat of the Sb0 family. The TaqI site is associated with a G to C transversion upstream of the transcription initiation site (exon 1–8 (G→C)). We discuss the possible roles of these elements in factor XII gene regulation.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s004390050147

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5

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Parallel-stranded DNA with Hoogsteen base pairing stabilized by a trans-[Pt(NH3)2]2+ cross-link: characterization and conversion into a homodimer and a triplex (2000)

Müller, Jens ; Drumm, Markus ; Boudvillain, Marc ; [et al.]

Springer

JBIC 5 (2000), S. 603-611

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ISSN: 1432-1327

Keywords: Parallel-stranded DNA Antigene Platinum Triplex Transplatin

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology

Notes: Abstract. The oligonucleotides 5′-d(TTTTCTTTTG) and 5′-d(AAAAGAAAAG) were cross-linked with a trans-[Pt(NH3)2]2+ entity via the N7 positions of the 3′-end guanine bases to give parallel-stranded (ps) DNA. At pH 4.2, CD and NMR spectroscopy indicate the presence of Hoogsteen base pairing. In addition, temperature-dependent UV spectroscopy shows an increase in melting temperature for the platinated duplex (35 °C) as compared to the non-platinated, antiparallel-stranded duplex formed from the same oligonucleotides (21 °C). A monomer-dimer equilibrium for the platinated 20mer is revealed by gel electrophoresis. At pH 4.2, addition of a third strand of composition 5′-d(AGCTTTTCTTTTAG) to the ps duplex leads to the formation of a triple helix with two distinct melting points at 38 °C (platinum cross-linked Hoogsteen part) and 21 °C (Watson-Crick part), respectively.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s007750000143

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6

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Sediments and sedimentary history of Lake Attersee (Salzkammergut, Austria) (1986)

Behbehani, Ahmad-Reza ; Müller, Jens ; Schmidt, Roland ; [et al.]

Springer

Hydrobiologia 143 (1986), S. 233-246

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ISSN: 1573-5117

Keywords: lake sediments ; late- and postglacial history ; palynology ; biogenic carbonate production ; eutrophication ; heavy metals

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Attersee represents a good example of a lake situated in the Northern forelands of the Northern Calcareous Alps and influenced by different sediment-supplying processes during the postglacial. Several compounds, of different origin, form the sediments of the basin. Clastics which are mainly composed of dolomites derive from the Northern Calcareous Alps. Clastic input of organic and inorganic particles is accomplished by rivers and landslides. They are responsible for the main input of siliciclasts like quartz, feldspar and mica. A high proportion of the sediment results from autochthonous biogenic carbonate precipitation. In the shallow sublittoral areas of the northern part of the lake benthic decalcification caused by encrusting macro- and micro-phytes is dominant, while in the southern and central parts of the lake epilimnetic decalcification caused by the blooming of phytoplancton is more important during summer. The total biogenic calcium carbonate production reaches about 11 000 to 12 000 metric tons a year. Nutrients and residues of cyanophytes (Oscillatoria rubescens) deriving from the eutrophic lake Mondsee were washed into lake Attersee by the Mondseeache. High amount of phosphorus in the sediments of the southern basin depicts local eutrophication in the mouth area of the Mondseeache. The average sedimentation rate in lake Attersee can be determined by different dating methods. Sedimentation rates increased during the last 110 years from 1 mm a year to 1.8–2 mm a year as a result of human activities. Five main phases in the postglacial sedimentary history can be recognized: Würm moraines and finely banded varves (before 13 000 B.P.), the early Attersee stage (from 13 000 B.P. up to 1200 B.P.), and the later Attersee stage after the Bavarian colonization (from 1200 B.P. on). Using heavy metal and isotope analyses the sedimentary history can be reconstructed in more detail for the last 100 years.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00026667

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7

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Geology and sedimentary history of Lake Traunsee (Salzkammergut, Austria) (1986)

Schneider, Jürgen ; Müller, Jens ; Sturm, Michael

Springer

Hydrobiologia 143 (1986), S. 227-232

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ISSN: 1573-5117

Keywords: lake sediments ; clastic deposits ; sediment echography ; turbidities ; sedimentary history

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Traunsee was formed by glacial overdeepening of a pre-existing fault system. Present-day morphology is characterized by a deep (189 m) narrow trough with steep slopes (〉50°) in the southern part surrounded by the Northern Calcareous Alps. The northern part of the lake is bordered by flysch and glacial deposits with gentle slopes (〈30°) and exhibits several ridges, basins and troughs. During the late and postglacial period, more than 45 m of sediment has accumulated in the central basin. Sedimentation in the southern part of Traunsee is mainly controlled by the river Traun forming a prograding delta in the south and — within the past 50 years — by industrial tailings consisting mainly of calcite. Sediments are distributed by undercurrents and by turbidites. Cores from the central basin thus show an intercalation of Traun-derived dolomite-rich sediments with anthropogenic muds from the tailings deposited up to more than 6 km from its source. Within the northern basin, land slides from the flysch region played an important role leading to drastic changes in the morphology of slopes and adjacent basins. These slumps have persisted until historic times. Sedimentation in the shallow sublittoral regions is dominated by benthic biogenic decalcification. The frequency of turbidite sedimentation within the profundal basin decreased during the last 200 years probably due to man's activities in the drainage area such as regulation of rivers and torrents. Sedimentation rates during the past decades range from 2–3 cm/a in the southern basin to 0.4 cm/a in the northern part as shown by 137Cs-dating.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00026666

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8

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Industrial tailings in Lake Traunsee (Salzkammergut, Austria) (1986)

Müller, Jens ; Schneider, Jürgen ; Sturm, Michael

Springer

Hydrobiologia 143 (1986), S. 401-405

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ISSN: 1573-5117

Keywords: lake sediments ; turbidites ; tailings ; geochemistry ; environmental hazards

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Tailings from salt work and a soda work have been pumped into the southern part of Traunsee (bay of Ebensee) for more than 50 years. Solid wastes have accumulated to form a pile 〉 40 m high with a total volume of 〉 3 × 106 m3. The sandy silty mud consists of calcite and other phases of CaCO3, brucite, CaO resp. Ca(OH)2 and gypsum. The chemical environment of the mud is characterized by extreme alkaline pore water (pH 〉 10 up to 12.5; total amount of pore water: 3 × 106 t) and highly negative Eh-values. These values result from the pumped tailings and from postdepositional chemical processes such as dissolution resp. reaction of CaO, brucite and gypsum and precipitation of CaCO3. The high water content of the mud and the steep slopes (〉 15°) are responsible for frequent debris flows near the waste inlet, and occasional turbidity currents flow down to the distal basin floor. One particular current may transport up to 4 × 105 m3 of alkaline mud as far as 6 km from the inlet into the profundal basin plain, intercalating with natural lake sediments. Sedimentation rates in the northern part of Traunsee within the last decades are isotopically measured as 0.4–0.5 cm/a. In the central basin the sedimentation rates within the last 50 years are in the range of 2–3 cm/a. Up to 75% of the profundal sediments consist of industrial tailings and turbidites. Thus, within a substantial portion of the profundal zone (about 15%) the benthic fauna and the chemical environment of the sediments are influenced by the alkaline tailings.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00026689

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