Matches in SemOpenAlex for { <https://semopenalex.org/work/W2765762637> ?p ?o ?g. }
- W2765762637 endingPage "79" @default.
- W2765762637 startingPage "62" @default.
- W2765762637 abstract "Abstract Cryptoendolithic lichens and cyanobacteria living in porous sandstone in the high‐elevation McMurdo Dry Valleys are purported to be among the slowest growing organisms on Earth with cycles of death and regrowth on the order of 10 3 –10 4 years. Here, organic biomarker and radiocarbon analysis were used to better constrain ages and carbon sources of cryptoendoliths in University Valley (UV; 1,800 m.a.s.l) and neighboring Farnell Valley (FV; 1,700 m.a.s.l). Δ 14 C was measured for membrane component phospholipid fatty acids (PLFA) and glycolipid fatty acids, as well as for total organic carbon (TOC). PLFA concentrations indicated viable cells comprised a minor (<0.5%) component of TOC. TOC Δ 14 C values ranged from −272‰ to −185‰ equivalent to calibrated ages of 1,100–2,550 years old. These ages may be the result of fractional preservation of biogenic carbon and/or sudden large‐scale community death and extended period(s) of inactivity prior to slow recolonization and incorporation of 14 C‐depleted fossil material. PLFA Δ 14 C values were generally more modern than the corresponding TOC and varied widely between sites; the FV PLFA Δ 14 C value (+40‰) was consistent with modern atmospheric CO 2 , while UV values ranged from −199‰ to −79‰ (calibrated ages of 1,665–610 years). The observed variability in PLFA Δ 14 C depletions is hypothesized to reflect variations in the extent of fixation of modern atmospheric CO 2 and the preservation and recycling of older organic carbon by the community in various stages of sandstone recolonization. PLFA profiles and microbial community compositions as determined by molecular genetic characterizations and microscopy differed between the two valleys (e.g., predominance of biomarker 18:2 [>50%] in FV compared to UV), representing microbial communities that may reflect distinct stages of sandstone recolonization and/or environmental conditions. It is thus proposed that Dry Valley cryptoendolithic microbial communities are faster growing than previously estimated." @default.
- W2765762637 created "2017-11-10" @default.
- W2765762637 creator A5006368555 @default.
- W2765762637 creator A5009686858 @default.
- W2765762637 creator A5070297821 @default.
- W2765762637 creator A5080065169 @default.
- W2765762637 creator A5086036279 @default.
- W2765762637 date "2017-10-26" @default.
- W2765762637 modified "2023-10-03" @default.
- W2765762637 title "Variability in carbon uptake and (re)cycling in Antarctic cryptoendolithic microbial ecosystems demonstrated through radiocarbon analysis of organic biomarkers" @default.
- W2765762637 cites W1246197269 @default.
- W2765762637 cites W1488389288 @default.
- W2765762637 cites W1494081909 @default.
- W2765762637 cites W1556665743 @default.
- W2765762637 cites W157217960 @default.
- W2765762637 cites W1580783052 @default.
- W2765762637 cites W1648583306 @default.
- W2765762637 cites W1830114392 @default.
- W2765762637 cites W1931878801 @default.
- W2765762637 cites W1944146744 @default.
- W2765762637 cites W1967910721 @default.
- W2765762637 cites W1972035091 @default.
- W2765762637 cites W1982390705 @default.
- W2765762637 cites W1982839449 @default.
- W2765762637 cites W1983436559 @default.
- W2765762637 cites W1986944518 @default.
- W2765762637 cites W1987370214 @default.
- W2765762637 cites W1995570321 @default.
- W2765762637 cites W2001096877 @default.
- W2765762637 cites W2002311269 @default.
- W2765762637 cites W2005517056 @default.
- W2765762637 cites W2014393629 @default.
- W2765762637 cites W2016980835 @default.
- W2765762637 cites W2025635414 @default.
- W2765762637 cites W2029705565 @default.
- W2765762637 cites W2031015173 @default.
- W2765762637 cites W2037263411 @default.
- W2765762637 cites W2040607973 @default.
- W2765762637 cites W2042031478 @default.
- W2765762637 cites W2046547516 @default.
- W2765762637 cites W2056026935 @default.
- W2765762637 cites W2058695579 @default.
- W2765762637 cites W2061450617 @default.
- W2765762637 cites W2063500878 @default.
- W2765762637 cites W2063987912 @default.
- W2765762637 cites W2067725466 @default.
- W2765762637 cites W2067856736 @default.
- W2765762637 cites W2074373418 @default.
- W2765762637 cites W2076357709 @default.
- W2765762637 cites W2080538248 @default.
- W2765762637 cites W2081104534 @default.
- W2765762637 cites W2081322789 @default.
- W2765762637 cites W2083522166 @default.
- W2765762637 cites W2083881534 @default.
- W2765762637 cites W2089167288 @default.
- W2765762637 cites W2092833897 @default.
- W2765762637 cites W2095589143 @default.
- W2765762637 cites W2102663325 @default.
- W2765762637 cites W2108718991 @default.
- W2765762637 cites W2108798276 @default.
- W2765762637 cites W2113185021 @default.
- W2765762637 cites W2113449951 @default.
- W2765762637 cites W2115565862 @default.
- W2765762637 cites W2116895571 @default.
- W2765762637 cites W2117317129 @default.
- W2765762637 cites W2117832738 @default.
- W2765762637 cites W2119008763 @default.
- W2765762637 cites W2119445227 @default.
- W2765762637 cites W2121596095 @default.
- W2765762637 cites W2121865382 @default.
- W2765762637 cites W2121966174 @default.
- W2765762637 cites W2124106296 @default.
- W2765762637 cites W2125915330 @default.
- W2765762637 cites W2126387770 @default.
- W2765762637 cites W2127439045 @default.
- W2765762637 cites W2128855956 @default.
- W2765762637 cites W2134508082 @default.
- W2765762637 cites W2139388007 @default.
- W2765762637 cites W2142073035 @default.
- W2765762637 cites W2145301542 @default.
- W2765762637 cites W2147486201 @default.
- W2765762637 cites W2149507765 @default.
- W2765762637 cites W2150231600 @default.
- W2765762637 cites W2152752859 @default.
- W2765762637 cites W2154051843 @default.
- W2765762637 cites W2156125289 @default.
- W2765762637 cites W2156880719 @default.
- W2765762637 cites W2167452694 @default.
- W2765762637 cites W2175485523 @default.
- W2765762637 cites W2211575308 @default.
- W2765762637 cites W2300552860 @default.
- W2765762637 cites W2301954100 @default.
- W2765762637 cites W2319380543 @default.
- W2765762637 cites W2324679713 @default.
- W2765762637 cites W2329301263 @default.
- W2765762637 cites W2343305839 @default.
- W2765762637 cites W4294555410 @default.
- W2765762637 cites W4323875060 @default.