نتایج جستجو برای: lacustrine environment

تعداد نتایج: 519568  

Journal: :Earth Surface Processes and Landforms 2021

Abstract We investigated four subaerial (paleo)lacustrine landforms at the north‐eastern shoreline of Schweriner See, Germany. These included two beach ridges, one nearshore bar and a silting up sequence located close to fossil cliff, which marks former maximum extent See. used luminescence profiling with SUERC portable OSL device (POSL) on all sediment sequences in combination sedimentological...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2014
J L C Novaes S I L Moreira C E C Freire M M O Sousa R S Costa

The aim of this study was to analyse the composition, structure and spatial and temporal patterns of diversity and abundance of the ichthyofauna of the Santa Cruz Reservoir in semi-arid Brazil. Data were collected quarterly at eight sampling locations on the reservoir between February 2010 and November 2011 using gillnets from 12- to 70-mm mesh that were left in the water for 12h00min during th...

2017
Mary M Peacock Evon R Hekkala Veronica S Kirchoff Lisa G Heki

Currently one small, native population of the culturally and ecologically important Lahontan cutthroat trout (Oncorhynchus clarkii henshawi, LCT, Federally listed) remains in the Truckee River watershed of northwestern Nevada and northeastern California. The majority of populations in this watershed were extirpated in the 1940s due to invasive species, overharvest, anthropogenic water consumpti...

2014
Thomas A. Neubauer Oleg Mandic Mathias Harzhauser

Melanopsis fateljensis (Caenogastropoda: Cerithiimorpha: Melanopsidae) is described as a new species from the early Middle Miocene lacustrine deposits of the Kupres Basin. Similarities to other co-occurring melanopsids are discussed. Its unique morphology, in particular the elongate, stepped spire with prominent spiral bulges, clearly distinguishes the new species from all other Melanopsidae kn...

2014
JAMES W. HEAD DAVID R. MARCHANT

The early climate of Mars (Noachian Period, the first ~20% of its history) is thought to differ significantly from that of its more recent history (Amazonian Period, the last ~66%) which is characterized by hyperarid, hypothermal conditions that result in mean annual air temperatures (MAAT) well below 0°C, a global cryosphere, minimal melting on the ground surface, and a horizontally stratified...

Journal: :Molecular phylogenetics and evolution 2015
Luca Buonerba Serena Zaccara Giovanni B Delmastro Massimo Lorenzoni Walter Salzburger Hugo F Gante

Previous studies have given substantial attention to external factors that affect the distribution and diversification of freshwater fish in Europe and North America, in particular Pleistocene and Holocene glacial cycles. In the present paper we examine sequence variation at one mitochondrial and four nuclear loci (over 3 kbp) from populations sampled across several drainages of all species of ...

2004
O. ISIK PAUL A. SCHROEDER

The S ile Region contains discontinuous, cyclic, thin coal beds and industrial clay deposits that were accumulated in lacustrine basins which received extensive volcanoclastic sediments due to transport of highly weathered calc-alkaline volcanic rocks. The Sülüklü area has the largest kaolin deposit in this region. Cyclic kaolinization depended on the degree of leaching of Si and alkalis in cyc...

Journal: :Proceedings of the International Association of Hydrological Sciences 2015

2015
Juliane D. Weiss Fenton P. D. Cotterill Ulrich K. Schliewen

A long history of research focused on the East Africa cichlid radiations (EAR) revealed discrepancies between mtDNA and nuclear phylogenies, suggesting that interspecific hybridisation may have been significant during the radiation of these fishes. The approximately 250 cichlid species of Lake Tanganyika have their roots in a monophyletic African cichlid assemblage, but controversies remain abo...

Journal: :Bulletin of the Geological Society of Finland 1986

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