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Université de Fribourg

Growth and demise of a Paleogene isolated carbonate platform of the Offshore Indus Basin, Pakistan : effects of regional and local controlling factors

Shahzad, Khurram ; Betzler, Christian ; Ahmed, Nadeem ; Qayyum, Farrukh ; Spezzaferri, Silvia ; Qadir, Anwar

In: International Journal of Earth Sciences, 2018, vol. 107, p. 481-504

Based on high-resolution seismic and well datasets, this paper examines the evolution and drowning history of a Paleocene–Eocene carbonate platform in the Offshore Indus Basin of Pakistan. This study uses the internal seismic architecture, well log data as well as the microfauna to reconstruct factors that governed the carbonate platform growth and demise. Carbonates dominated by larger benthic...

Université de Fribourg

Developing Foram-AMBI for biomonitoring in the Mediterranean: Species assignments to ecological categories

Jorissen, Frans ; Nardelli, Maria Pia ; Almogi-Labin, Ahuva ; Barras, Christine ; Bergamin, Luisa ; Bicchia, Erica ; El Kateb, Akram ; Ferraro, Luciana ; Gann, Mary Mc ; Morigi, Caterina ; Romano, Elena ; Sabbatini, Anna ; Schweizer, Magali ; Spezzaferri, Silvia

In: Marine Micropaleontology, 2018, vol. 140, p. 33–45

Most environmental bio-monitoring methods using the species composition of marine faunas define the Ecological Quality Status of soft bottom ecosystems based on the relative proportions of species assigned to a limited number of ecological categories. In this study we analyse the distribution patterns of benthic foraminifera in the Mediterranean as a function of organic carbon gradients on...

Université de Fribourg

Assessing coral reef health in the North Ari Atoll (Maldives) using the FoRAM Index

Pisapia, C. ; Kateb, Akram El ; Hallock, P. ; Spezzaferri, Silvia

In: Marine Micropaleontology, 2017, vol. 133, no. Supplement C, p. 50–57

Tropical marine ecosystems are richly diverse, but are experiencing growing pressure from coastal development and tourism. Assessing the status of coral reef communities along gradients of human pressure is necessary to predict recovery capacity of reefs exposed to acute events such as mass bleaching or storm destruction. Islands in the central Maldives Archipelago, which experience three...

Université de Fribourg

Environmental constraints on Holocene cold‐water coral reef growth off Norway: Insights from a multiproxy approach

Raddatz, Jacek ; Liebetrau, Volker ; Trotter, Julie ; Rüggeberg, Andres ; Flögel, Sascha ; Dullo, Wolf-Christian ; Eisenhauer, Anton ; Voigt, Silke ; McCulloch, Malcolm

In: Paleoceanography, 2016, vol. 31, no. 10, p. 1350–1367

High-latitude cold-water coral (CWC) reefs are particularly susceptible due to enhanced CO₂ uptake in these regions. Using precisely dated (U/Th) CWCs (Lophelia pertusa) retrieved during research cruise POS 391 (Lopphavet 70.6°N, Oslofjord 59°N) we applied boron isotopes (δ¹¹B), Ba/Ca, Li/Mg, and U/Ca ratios to reconstruct the environmental boundary conditions of CWC reef growth. The...