نتایج جستجو برای: palaeoecology
تعداد نتایج: 398 فیلتر نتایج به سال:
Palaeoecology is an important branch of ecology that uses the subfossil remains of organisms preserved in lake, ocean and bog sediments to inform on changes in ecosystems and the environment through time. The analogue package contains functions to perform modern analogue technique (MAT) transfer functions, which can be used to predict past changes in the environment, such as climate or lake-wat...
Written sources indicate that the farm of Reykholt in Borgarfjörður, Iceland was built on the land of the original settlement farm, and that it had acquired the primary status in the valley by the early 12th century. Archaeological evidence suggests that the farm together with a church may have been established as early as ca. 1000 AD, which is when Christianity was adopted in Iceland. The site...
This study sought to determine the potential of sedimentary cladoceran assemblages for inferring changes in shallow lake ecological structure and function. The first stage o f the study aimed to isolate and quantify the main structuring forces of the contemporary zooplankton community. Zooplankton populations were sampled from 39 mesotrophic to hyper-eutrophic shallow lakes (<3 m average depth)...
Fossils of the Ediacara biota offer our earliest insight into diverse macroscopic life on this planet. In particular, given the diversity and range of exquisite soft-bodied preservation, the potential for unraveling aspects of the paleobiology and paleoecology is great. Clearly, however, there can be a taphonomic overprint that dictates how complete the assemblage is. New diversity data (includ...
a Laboratory of Soil Biology, Institute of Biology, University of Neuchâtel, CH‐2000 Neuchâtel, Switzerland b Swiss Federal Research Institute WSL, Ecosystem Boundaries Research Unit, Wetlands Research Group, Station 2, CH‐1015 Lausanne, Switzerland c Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratoire des Systèmes Ecologiques, Station 2, CH‐1015 Lausanne, Switzerland d School of Scien...
Yarrow Axford1,2,†, Jason P. Briner3, Donna R. Francis4, Gifford H. Miller2,5, Ian R. Walker6, and Alexander P. Wolfe7 Department of Earth and Planetary Sciences, Northwestern University, 1850 Campus Drive, Evanston, Illinois 60208, USA Institute of Arctic and Alpine Research, University of Colorado, UCB 450, Boulder, Colorado 80309, USA Department of Geology, University at Buffalo, 411 Cooke H...
During IODP expedition 359 multiple holes recovered Modern to Middle Miocene sediments from the Kardiva Drift which is strongly influenced by monsoonally-driven currents. Two continued below drift into Lower that were deposited under rather different conditions following Oligocene subsidence of Maldives Ridge. These are characterised marked alternation between dark organic-rich sapropelic and p...
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