FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3033366959> ?p ?o ?g. }

• W3033366959 endingPage "109824" @default.
• W3033366959 startingPage "109824" @default.
• W3033366959 abstract "Sediment cores recovered by the Olduvai Gorge Coring Project (OGCP) in 2014 afford the opportunity to examine the coupling of biogeochemical evidence for climatic and environmental change within the context of hominin evolution at this renowned East African locality. Investigations of elemental (total organic carbon – TOC or Corg wt%, carbon to nitrogen ratio - C/N), molecular (source-specific biomarkers), and isotopic (δ13Corg, δ2HnC31) compositions of organic matter provide evidence for temporal changes in sedimentary materials derived from terrestrial plants (C3, C4) and aquatic producers (algae, sponges, cyanobacteria), and in precipitation. The 13 kyr record of Upper Bed I immediately preceding Tuff IB extends high-resolution stratigraphic profiles of precession-scale alternations of wetter and drier conditions to encompass the entire interval from the Bed I Basalt to Tuff IB. The second wetter interval, designated W2, records local influences on climate and water supply consistent with evidence for discrete sediment sources based its physical properties (e.g., gamma radiation, magnetic susceptibility) compared with the overall sequence. The δ13CTOC values for wetter interval W2 reveal two millennial-scale (~2.5 kyr) drier episodes followed by a shift in the dominance of C3 over C4 plants accompanying the transition to a drier climate (D3). Moreover, biogeochemical data for Upper Bed I show that changes from drier to wetter conditions occur more rapidly (~900 yr) than wetter to drier transitions (>2.6 kyr), based on interpolated ages. In addition, biomarker profiles indicate that aquatic plants, primarily algae and macrophytes, may have been subject to more profound and faster fluctuations than variations in terrestrial vegetation expressed in terms of the relative proportions of woodland and grassland settings. Thus, environmental and climatic changes not only influenced the availability of resources of food and shelter for hominins within the Olduvai region but also led to their variation on centennial to millennial to precessional timescales." @default.
• W3033366959 created "2020-06-12" @default.
• W3033366959 creator A5014237004 @default.
• W3033366959 creator A5032427401 @default.
• W3033366959 creator A5039201543 @default.
• W3033366959 creator A5040963066 @default.
• W3033366959 creator A5041496271 @default.
• W3033366959 creator A5044597046 @default.
• W3033366959 creator A5052394353 @default.
• W3033366959 creator A5070832602 @default.
• W3033366959 creator A5075442802 @default.
• W3033366959 creator A5081310757 @default.
• W3033366959 creator A5086322283 @default.
• W3033366959 date "2020-10-01" @default.
• W3033366959 modified "2023-10-15" @default.
• W3033366959 title "Biogeochemical evidence from OGCP Core 2A sediments for environmental changes preceding deposition of Tuff IB and climatic transitions in Upper Bed I of the Olduvai Basin" @default.
• W3033366959 cites W1147853437 @default.
• W3033366959 cites W1535086263 @default.
• W3033366959 cites W1898954079 @default.
• W3033366959 cites W1964905272 @default.
• W3033366959 cites W1966384168 @default.
• W3033366959 cites W1967986597 @default.
• W3033366959 cites W1970433533 @default.
• W3033366959 cites W1972601372 @default.
• W3033366959 cites W1976060931 @default.
• W3033366959 cites W1979278940 @default.
• W3033366959 cites W1982073239 @default.
• W3033366959 cites W1982361138 @default.
• W3033366959 cites W1987127683 @default.
• W3033366959 cites W1988287153 @default.
• W3033366959 cites W1989056503 @default.
• W3033366959 cites W1993368675 @default.
• W3033366959 cites W1993440581 @default.
• W3033366959 cites W1997170459 @default.
• W3033366959 cites W1997338331 @default.
• W3033366959 cites W1999865278 @default.
• W3033366959 cites W1999990262 @default.
• W3033366959 cites W2002431620 @default.
• W3033366959 cites W2002631603 @default.
• W3033366959 cites W2003175006 @default.
• W3033366959 cites W2005346644 @default.
• W3033366959 cites W2008205524 @default.
• W3033366959 cites W2012128186 @default.
• W3033366959 cites W2012690765 @default.
• W3033366959 cites W2016254491 @default.
• W3033366959 cites W2016645135 @default.
• W3033366959 cites W2019255504 @default.
• W3033366959 cites W2023431663 @default.
• W3033366959 cites W2023574738 @default.
• W3033366959 cites W2025924576 @default.
• W3033366959 cites W2029771879 @default.
• W3033366959 cites W2030315991 @default.
• W3033366959 cites W2030480980 @default.
• W3033366959 cites W2031154358 @default.
• W3033366959 cites W2032482799 @default.
• W3033366959 cites W2038008886 @default.
• W3033366959 cites W2042336747 @default.
• W3033366959 cites W2042394834 @default.
• W3033366959 cites W2043810485 @default.
• W3033366959 cites W2048652798 @default.
• W3033366959 cites W2048736764 @default.
• W3033366959 cites W2050416604 @default.
• W3033366959 cites W2051264737 @default.
• W3033366959 cites W2051467875 @default.
• W3033366959 cites W2051836047 @default.
• W3033366959 cites W2053190053 @default.
• W3033366959 cites W2053251742 @default.
• W3033366959 cites W2055406492 @default.
• W3033366959 cites W2056434007 @default.
• W3033366959 cites W2057490233 @default.
• W3033366959 cites W2057907380 @default.
• W3033366959 cites W2057946541 @default.
• W3033366959 cites W2059072198 @default.
• W3033366959 cites W2059699700 @default.
• W3033366959 cites W2061619975 @default.
• W3033366959 cites W2063360729 @default.
• W3033366959 cites W2064995128 @default.
• W3033366959 cites W2068729218 @default.
• W3033366959 cites W2069355839 @default.
• W3033366959 cites W2069573118 @default.
• W3033366959 cites W2069623298 @default.
• W3033366959 cites W2070475831 @default.
• W3033366959 cites W2073088022 @default.
• W3033366959 cites W2075541137 @default.
• W3033366959 cites W2079421819 @default.
• W3033366959 cites W2079446047 @default.
• W3033366959 cites W2079482585 @default.
• W3033366959 cites W2083571162 @default.
• W3033366959 cites W2085771800 @default.
• W3033366959 cites W2085863778 @default.
• W3033366959 cites W2086155711 @default.
• W3033366959 cites W2087629674 @default.
• W3033366959 cites W2087683608 @default.
• W3033366959 cites W2090147630 @default.
• W3033366959 cites W2091232642 @default.
• W3033366959 cites W2092358033 @default.
• W3033366959 cites W2093510911 @default.
• W3033366959 cites W2096425009 @default.

• next