scholarly journals Carbon isotope signatures of latest Permian marine successions of the Southern Alps suggest a continental runoff pulse enriched in land plant material

Fossil Record ◽  
2013 ◽  
Vol 16 (1) ◽  
pp. 97-109 ◽  
Author(s):  
Sonja H. Kraus ◽  
Rainer Brandner ◽  
Christoph Heubeck ◽  
Heinz W. Kozur ◽  
Ulrich Struck ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Plant Material ◽  
Land Plant ◽  
Southern Alps ◽  
Continental Runoff

Stratigraphy of early to middle Eocene hyperthermals from Possagno (Southern Alps, Italy) and comparison with global carbon isotope records

2019 ◽  
Vol 527 ◽  
pp. 39-52 ◽  
Author(s):  
Simone Galeotti ◽  
Mario Sprovieri ◽  
Domenico Rio ◽  
Matteo Moretti ◽  
Federica Francescone ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Middle Eocene ◽  
Southern Alps ◽  
Global Carbon

scholarly journals Stratigraphic significance of carbon isotope variations in the shallow-marine Seis/Siusi Permian–Triassic boundary section (Southern Alps, Italy)

Fossil Record ◽  
2009 ◽  
Vol 12 (2) ◽  
pp. 197-205 ◽  
Author(s):  
S. H. Kraus ◽  
S. Siegert ◽  
W. Mette ◽  
U. Struck ◽  
C. Korte
Keyword(s):  
Carbon Isotope ◽  
Southern Alps ◽  
Late Permian ◽  
Current Event ◽  
Triassic Boundary ◽  
Shallow Marine ◽  
Carbonate Carbon ◽  
Biostratigraphic Correlation ◽  
Positive Peak ◽  
Permian Triassic Boundary

Carbonate carbon-isotope values from the Permian–Triassic (P–T) boundary section at Seis/Siusi (Southern Alps, Italy) show a trend similar to that in numerous other P–T boundary sections worldwide. Values decrease from 3.2‰ (V-PDB) in the upper <i>Bellerophon</i> Limestone Formation (Late Permian) to a minimum of –1.7‰ in the lower Mazzin Member. This minimum may represent the P–T boundary. The overall declining carbon-isotope trend is interrupted by a ca. 1‰ positive excursion in the higher Tesero Oolite Horizon. This positive peak is located at a higher lithostratigraphic level than a comparable peak in the adjacent Pufels section, which suggests that the Tesero Oolite Horizon in the Seis section is stratigraphically slightly older than in the Pufels section, and this is also suggested by palaeomagnetic correlation. It is therefore concluded that the base of the Tesero Oolite Horizon does not reflect a synchronous "current event" but is slightly diachronous, a result that was previously shown by biostratigraphic correlation. Nevertheless, this suggestion should be verified by further detailed litho-, magneto- and chemostratigraphic analysis of other P–T sections in the Southern Alps. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.200900007" target="_blank">10.1002/mmng.200900007</a>

Effects of detrital carbonate on stable oxygen and carbon isotope data from varved sediments of the interglacial Piànico palaeolake (Southern Alps, Italy)

2009 ◽  
Vol 25 (2) ◽  
pp. 135-145 ◽  
Author(s):  
Clara Mangili ◽  
Achim Brauer ◽  
Birgit Plessen ◽  
Peter Dulski ◽  
Andrea Moscariello ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Southern Alps ◽  
Varved Sediments ◽  
Oxygen And Carbon Isotope ◽  
Isotope Data ◽  
Stable Oxygen ◽  
Detrital Carbonate

Carbon-isotope variability of Triassic amber, as compared with wood and leaves (Southern Alps, Italy)

2011 ◽  
Vol 302 (3-4) ◽  
pp. 187-193 ◽  
Author(s):  
Jacopo Dal Corso ◽  
Nereo Preto ◽  
Evelyn Kustatscher ◽  
Paolo Mietto ◽  
Guido Roghi ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Southern Alps

scholarly journals To concentrate or ventilate? Carbon acquisition, isotope discrimination and physiological ecology of early land plant life forms

2008 ◽  
Vol 363 (1504) ◽  
pp. 2767-2778 ◽  
Author(s):  
Moritz Meyer ◽  
Ulli Seibt ◽  
Howard Griffiths
Keyword(s):  
Carbon Isotope ◽  
Life Form ◽  
Carbon Isotope Discrimination ◽  
Physiological Ecology ◽  
Life Forms ◽  
Land Plant ◽  
Tissue Water ◽  
Isotope Discrimination ◽  
Plant Life Forms ◽  
Internal Conductance

A comparative study has been made of the photosynthetic physiological ecology and carbon isotope discrimination characteristics for modern-day bryophytes and closely related algal groups. Firstly, the extent of bryophyte distribution and diversification as compared with more advanced land plant groups is considered. Secondly, measurements of instantaneous carbon isotope discrimination ( Δ ), photosynthetic CO 2 assimilation and electron transport rates were compared during the drying cycles. The extent of surface diffusion limitation (when wetted), internal conductance and water use efficiency (WUE) at optimal tissue water content (TWC) were derived for liverworts and a hornwort from contrasting habitats and with differing degrees of thallus ventilation (as intra-thalline cavities and internal airspaces). We also explore how the operation of a biophysical carbon-concentrating mechanism (CCM) tempers isotope discrimination characteristics in two other hornworts, as well as the green algae Coleochaete orbicularis and Chlamydomonas reinhardtii . The magnitude of Δ was compared for each life form over a drying curve and used to derive the surface liquid-phase conductance (when wetted) and internal conductance (at optimal TWC). The magnitude of external and internal conductances, and WUE, was higher for ventilated, compared with non-ventilated, liverworts and hornworts, but the values were similar within each group, suggesting that both factors have been optimized for each life form. For the hornworts, leakiness of the CCM was highest for Megaceros vincentianus and C. orbicularis (approx. 30%) and, at 5%, lowest in C. reinhardtii grown under ambient CO 2 concentrations. Finally, evidence for the operation of a CCM in algae and hornworts is considered in terms of the probable role of the chloroplast pyrenoid, as the origins, structure and function of this enigmatic organelle are explored during the evolution of land plants.

Permian‐triassic carbon‐isotope anomaly in Greenland and in the southern Alps

1989 ◽  
Vol 2 (1) ◽  
pp. 37-49 ◽  
Author(s):  
H. Oberhänsli ◽  
K.J. Hsü ◽  
S. Piasecki ◽  
H. Weissert
Keyword(s):  
Carbon Isotope ◽  
Southern Alps

scholarly journals Stratigraphic significance of carbon isotope variations in the shallow-marine Seis/Siusi Permian-Triassic boundary section (Southern Alps, Italy)

Fossil Record ◽  
2009 ◽  
Vol 12 (2) ◽  
pp. 197-205 ◽  
Author(s):  
Sonja H. Kraus ◽  
Susann Siegert ◽  
Wolfgang Mette ◽  
Ulrich Struck ◽  
Christoph Korte
Keyword(s):  
Carbon Isotope ◽  
Southern Alps ◽  
Triassic Boundary ◽  
Shallow Marine ◽  
Permian Triassic Boundary
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