Read e-book online Benthic foraminifers as tools to reconstruct high-latitude PDF

By Nina Forster

Cold-water corals happen around the globe from excessive latitudes to tropical parts, in a variety of settings from the deep-sea to shallow marine environments close to the coast. the subject of this thesis is the institution and extension of data approximately environmental stipulations controlling cold-water coral (CWC) mound improvement. From literature it's identified that glacial-interglacial cycles force improvement and geographic distribution of CWC mounds on a wide scale. nevertheless, wisdom in regards to the impact of small scale climatic and oceanographic alterations throughout the Holocene is scarce. hence, this thesis makes a speciality of the research of the restricted Holocene climatic and oceanographic alterations and their impact at the means of mound genesis. For this goal, a Holocene CWC mound atmosphere in a legitimate within the Altafjord in northern Norway (70°N) -- the Stjernsund -- was once selected and the neighborhood benthic environment used to be largely analysed.

Von den sub-arktischen hohen Breiten bis in warme tropische Zonen besiedeln Kaltwasserkorallen unseren Planeten. Sie haben sich verschiedenste Lebensräume erschlossen --- Von der Tiefsee bis zu marinen Flachwassergebieten an der Küste kann ihr Vorkommen beobachtet werden. Sie bilden faszinierende Ökosysteme die erst in den letzten Jahrzehnten intensiver erforscht wurden. Diese Arbeit widmet sich der tieferen Erforschung dieser Lebensräume. Im Fokus stehen dabei Umweltbedingungen, die die Entwicklung der Kaltwasserkorallenvorkommen kontrollieren. Umfangreiche frühere Untersuchungen haben bereits gezeigt, dass ihr Wachstum, als auch ihre geographische Verbreitung im Wesentlichen von Glazial-Interglazial-Zyklen gesteuert werden. Die kurzzeitlichen klimatischen und ozeanographischen Steuerungsfaktoren sind im Vergleich dazu jedoch nahezu unbekannt. Daher konzentriert sich diese Arbeit auf die Erforschung von kurzeitigen klimatischen und ozeanographischen Veränderungen, die insbesondere im Holozän zu beobachten sind, sowie deren mögliche Auswirkungen auf die Entwicklung von Kaltwasserkorallen Mounds. Hierzu wurde der holozäne Kaltwasserkorallen Mound im Stjernsund, ein Sund im Altafjord in Nordnorwegen (70°N) ausgewählt und dessen benthisches Ökosystem umfassend analysiert.

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Benthic foraminifers as tools to reconstruct high-latitude Holocene climate variability and processes during cold-water coral mound growth and development: ... case study from Stjernsund, northern Norway by Nina Forster


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