نتایج جستجو برای: paleo ecology

تعداد نتایج: 54894  

Journal: :Memorias do Instituto Oswaldo Cruz 2000
A Araújo L F Ferreira

Paleo-parasitology may be developed as a new tool to parasite evolution studies. DNA sequences dated thousand years ago, recovered from archaeological material, means the possibility to study parasite-host relationship coevolution through time. Together with tracing parasite-host dispersion throughout the continents, paleo-parasitology points to the interesting field of evolution at the molecul...

2016
Yue Wang ZhiMin Jian Ping Zhao Dong Xiao JunMing Chen

In a 250-kyr transient simulation of the Community Earth System Model (CESM), we identified a precessional forced seesaw of the summer middle-upper tropospheric eddy temperature between Asia and the North Pacific as the paleo-APO (Asian-Pacific oscillation). The paleo-APO variability is out of phase with the precession parameter. Corresponding to a positive paleo-APO phase, both the subtropical...

Dongsheng Sun Juanhua Lin Yusong Yuan,

Weiyuan gas field, located in the Sichuan basin of south China, is a large marine gas field with the oldest reservoir (the Sinian sequences) in south China. The hydrocarbon origin of the gas field has long been debated by petroleum geologists. Recently, it was recognized that a paleo-oil pool maybe the significant contributor to the gas field. Consequently, when the paleo-oil pool had been crac...

Journal: :Frontiers in Earth Science 2021

Late Pleistocene permafrost of the Yedoma type constitutes a valuable paleo-environmental archive due to presence numerous and well-preserved floral faunal fossils. The study fossil inventory allows for qualitative quantitative reconstructions past ecosystem climate conditions variations over time. Here, we present results combined paleo-proxy studies including pollen, chironomid, diatom mammal...

Journal: :Global and Planetary Change 2021

In the eastern Mediterranean Sea, early Holocene was characterized by major climatic and oceanographic changes that led to formation of last sapropel (S1) between 10.8 6.1 kyr cal. BP. These hydrographic might have altered water exchange western sub-basins through Strait Sicily, but existing evidences are inconclusive. present study we show new evidence from sediment core NDT-6-2016 located at ...

Journal: :Remote Sensing 2014
Felix Bachofer Geraldine Quénéhervé Michael Märker

The purpose of this paper is to describe the delineation of paleo-shorelines using high resolution microwave images and digital image processing tools, and with that to contribute to the understanding of the complex landscape evolution of the Lake Manyara Basin. The surroundings of Lake Manyara are the focus of several paleo-archeological investigations, since the location is close to Olduvai G...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Susanne A Fritz Jussi T Eronen Jan Schnitzler Christian Hof Christine M Janis Andreas Mulch Katrin Böhning-Gaese Catherine H Graham

At global and regional scales, primary productivity strongly correlates with richness patterns of extant animals across space, suggesting that resource availability and climatic conditions drive patterns of diversity. However, the existence and consistency of such diversity-productivity relationships through geological history is unclear. Here we provide a comprehensive quantitative test of the...

2017
Sergio M. Q. Lima Waldir M. Berbel-Filho Thais F. P. Araújo Henrique Lazzarotto Andrey Tatarenkov John C. Avise

Paleo-drainage connections and headwater stream-captures are two main historical processes shaping the distribution of strictly freshwater fishes. Recently, bathymetric-based methods of paleo-drainage reconstruction have opened new possibilities to investigate how these processes have shaped the genetic structure of freshwater organisms. In this context, the present study used paleo-drainage re...

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