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  • 1
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    A natural and controlled source seismic profile through the Eastern Alps: TransformationsALP (2004)
    In:  Earth planet. Sci. Lett., Warszawa, EGS, vol. 225, no. 1-2, pp. 115-129, pp. L15S11, (ISSN: 1340-4202)
    Details
    Publication Date: 2004
    Keywords: Deep seismic sounding (espec. cont. crust) ; Seismology ; Seismics (controlled source seismology) ; Austria ; Italy ; EPSL
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Fluid induced seismicity guided by a continental fault: Injection experiment of 2004/2005 at the German Deep Drilling Site (KTB) (2006)
    In:  Geophys. Res. Lett., Luxembourg, Deutsche Geophys. Gesellschaft, vol. 33, no. 1, pp. 1051-1066, pp. L01309, (ISSN: 1340-4202)
    Details
    Publication Date: 2006
    Keywords: Induced seismicity ; Seismicity ; Fault zone ; scientific drilling ; Hydraulic fracturing ; Borehole geophys. ; Non-linear effects ; Physical properties of rocks ; diffusivity ; GRL ; Kuempel ; Kumpel ; 0935 ; Exploration ; Geophysics: ; Seismic ; methods ; (3025, ; 7294) ; 0905 ; Continental ; structures ; (8109, ; 8110) ; 8010 ; Structural ; Geology: ; Fractures ; and ; faults
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Austral botany: flora of tierra del fuego (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-01-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kummerow, J -- New York, N.Y. -- Science. 1984 Jan 27;223(4634):387-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17829883" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    PAPER CURRENT
  • 4
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    Probing the Northern Chile megathrust with seismicity – The 2014 M8.1 Iquique earthquake sequence (2019)
    Wiley
    Details
    Publication Date: 2019
    Description: Abstract We used data from 〉100 permanent and temporary seismic stations to investigate seismicity patterns related to the 1 April 2014 M8.1 Iquique earthquake in northern Chile. Applying a multistage automatic event location procedure to the seismic data, we detected and located ~19,000 foreshocks, aftershocks and background seismicity for one month preceding and nine month following the mainshock. Foreshocks skirt around the updip limit of the mainshock asperity; aftershocks occur mainly in two belts updip and downdip of it. The updip seismicity primarily locates in a zone of transitional friction on the megathrust and can be explained by preseismic stress loading due to slow‐slip processes and afterslip driven by increased Coulomb failure stress (CFS) due to the mainshock and its largest aftershock. Afterslip further south also triggered aftershocks and repeating earthquakes in several EW striking streaks. We interpret the streaks as markers of surrounding creep that could indicate a change in fault mechanics and may have structural origin, caused by fluid‐induced failure along presumed megathrust corrugations. Megathrust aftershocks terminate updip below the seaward frontal prism in the outer continental wedge that probably behaves aseismically under velocity‐strengthening conditions. The inner wedge locates further landward overlying the megathrust's seismogenic zone. Further downdip, aftershocks anticorrelate with the two major afterslip patches resolved geodetically and partially correlate with increased CFS, overall indicating heterogeneous frictional behavior. A region of sparse seismicity at ~40‐50 km depth is followed by the deepest plate interface aftershocks at ~55‐65 km depth, which occur in two clusters of significantly different dip.
    Print ISSN: 2169-9313
    Electronic ISSN: 2169-9356
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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    PAPER CURRENT
  • 5
    Electronic Resource
    Electronic Resource
    Limitations on Sphagnum growth and net primary production in the foothills of the Philip Smith Mountains, Alaska (1989)
    Springer
    Oecologia 80 (1989), S. 256-262 
    Details
    ISSN: 1432-1939
    Keywords: Tussock tundra ; Sphagnum ; Growth ; Tundra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the foothills of the Philip Smith Mountains, Brooks Range, Alaska, tussock tundra occurs on rolling hills and in valleys that were shaped by Pleistocene glaciations. During the 1986 and 1987 summer seasons, Sphagnum growth and production were determined in “water tracks” on tundra slopes that acted to channel water flow to the valley bottom stream and in “intertrack tundra” areas that were relatively homogeneous with respect to downslope drainage. Measurements were made under ambient environmental conditions and on mosses receiving supplemental irrigation in each area. Growth rate for Sphagnum spp. (cm shoot length increase/day) was low and relatively constant in intertrack tundra and highest but quite variable in water tracks. A strong negative correlation was found between Sphagnum spp. growth rate and solar irradiance in the shady environment below Salix canopies in the water tracks. Estimates of net annual dry weight (DW) production for Sphagnum spp. ranged from 0.10 g DW dm-2 yr-1 in intertrack tundra vegetation to 1.64 g DW dm-2 yr-1 in well-shaded water tracks. Experimental water additions had little effect on growth and production in intertrack tundra and well-developed water tracks, but significantly increased growth in a weakly-developed water track community. Low production over large areas of tundra slopes may occur due to presence of slow growing species resistant to dessication in intertrack tundra as opposed to rapidly growing less compact species within the limited extent of water tracks. We hypothesize that species capable of rapid growth occur also in weakly-developed water tracks, and that these are water-limited more often than plants occurring in well-developed water track situations. Where experienced, high light intensity may additionally limit growth due to photoinhibition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380160
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  • 6
    Electronic Resource
    Electronic Resource
    Competition for nitrogen in a tussock tundra ecosystem (1982)
    Springer
    Plant and soil 66 (1982), S. 317-327 
    Details
    ISSN: 1573-5036
    Keywords: Carbon ; Competition ; Isotope ; Mosses ; Nitrogen ; Soil microbes ; Tundra ; Vascular plants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The objective was to measure the competition for nitrogen among vascular plants, mosses, and soil microbes along a continuum of nitrogen availability, induced by carbon and nitrogen amendments, in a tussock tundra ecosystem.15N was used as a tracer. Vascular plants showed an increasing15N recovery with increasing time and with increasing nitrogen availability; the latter suggests that nitrogen was limiting vascular plant growth. Green mosses took up15N initially, but showed no significant trends with either treatment or time. There was a higher15N recovery in the soil insoluble compartment for the carbon-amended treatment than in the nitrogen-amended treatments; this suggested that carbon as an energy source limited microbial activity. After two months, the relative15N recovery fell in the order: soil microbes (≈79%)〉vascular plants (≈16%) 〉green mosses (≈2%).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02183798
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  • 7
    Electronic Resource
    Electronic Resource
    N2(C2H2−C2H4) fixation in two species of Ceanothus seedlings in second year postfire chaparral (1988)
    Springer
    Plant and soil 109 (1988), S. 207-213 
    Details
    ISSN: 1573-5036
    Keywords: Ceanothus ; chaparral ; nitrogen fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Nitrogen fixation in excised root nodules of 2-year-old, postfireCeanothus tomentosus andC. leucodermis seedlings was measured over an 8-month period using the acetylene reduction method. High levels of NO3−N and NH4−N present in postfire soils were limited to the upper 10 cm and did not inhibit nodulation in these deeper-rooting seedlings. Decreases in acetylene reduction activity occurred with decreased soil moisture and increased soil temperature. Nitrogen gains from these two Ceanothus shrub seedlings totalled 1.6 kg N ha−1 yr−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02202086
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  • 8
    Electronic Resource
    Electronic Resource
    Root biomass of a dry deciduous tropical forest in Mexico (1991)
    Springer
    Plant and soil 131 (1991), S. 225-228 
    Details
    ISSN: 1573-5036
    Keywords: coarse roots ; fine roots ; root distribution ; root:shoot ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The deciduous tropical dry forest at Chamela (Jalisco, Mexico) occurs in a seasonal climate with eight rainless (November through June) and four wet months (700 mm annual precipitation). The forest reaches a mean height of 10 m. Tree density in the research area was 4700 trees per ha with a basal area at breast height of 23 m2 per ha. The above-and below-ground biomass of trees, shrubs, and lianas was 73.6 Mg ha−1 and 31 Mg ha−1, respectively. A root:shoot biomass ratio of 0.42 was calculated. Nearly two thirds of all roots occur in the 0–20 cm soil layer and 29% of all roots have a diameter of less than 5 mm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00009452
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of fire on fine root density in red shank (Adenostoma sparsifolium Torr.) chaparral (1983)
    Springer
    Plant and soil 70 (1983), S. 347-352 
    Details
    ISSN: 1573-5036
    Keywords: Adenostoma sparsifolium ; Brush fire ; Chaparral ; Fine roots ; Ingrowth cores ; Root biomass ; Soil cores
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In December 1981 a 2 ha site of 54-yr southern California chaparral was burned. A frequent species on this site wasAdenostoma sparsifolium. This shrub regenerates after fire with stump sprouting. The total fine root (diam. 〈1.0 mm) density of the matureA. sparsifolium stand was estimated to be 50–100 g m−2. This value was obtained in late summer. At this time fine root density in chaparral is at its lowest. In the growing season after the burn no signs for reduced fine root density were detected. Indeed, indications for a fire-enchanced flush of fine root growth were found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374891
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  • 10
    Electronic Resource
    Electronic Resource
    Fine-root growth dynamics in cacao (Theobroma cacao) (1982)
    Springer
    Plant and soil 65 (1982), S. 193-201 
    Details
    ISSN: 1573-5036
    Keywords: Alfisol ; Fine root ; Humid tropics ; Precipitation ; Root growth ; Root tip ; Shoot flush ; Theobroma cacao
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Fine-root density in a mature cacao plantation in Bahia/Brazil was monitored at weekly intervals from October, 1980 until March, 1981. About 40 g m−2 of fine roots (diameter〈1 mm) were found during this period. The relative stability of this value over the six months period contrasted with significant changes in the number of growing root tips per unit of soil volume. These changes were not conditioned by the rainfall pattern although low root tip values were counted at the end of a minor drought period. A significant negative correlation was found between a shoot growth flush in January and the activity of the fine-root systems as measured by the number of new root tips.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374650
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