000			02759nab a2200313 4500
003			OSt
005			20220808165650.0
007			cr aa aaaaa
008			220808b |||||||| |||| 00| 0 eng d
100			_a Nascimento, Majoi de Novaes _951482
245			_aA 12,700-year history of paleolimnological change from an Andean microrefugium/
260			_bsage _c2019
300			_aVol 29, Issue 2, 2019 : (231-243 p.)
520			_aWe present a 12,6700-yr limnological history of Lake Miski, a high-elevation lake in a wet section of the Peruvian Andes. While many shallow Andean lakes dried up during the mid-Holocene, loss-on-ignition, magnetic susceptibility, and diatom analysis showed that Lake Miski was a constant feature in the landscape. Overall, fluctuations in the fossil diatom communities of Lake Miski tracked changes in insolation, but this was not the only mechanism influencing observed variability. We identify periods when insolation and interactions with the Pacific Ocean may have played a role in structuring local climate and diatom assemblages. The true mid-Holocene Dry Event (MHDE) is manifested in this record between 8000 and 5000 cal BP, but the carbonate stratigraphy and the diatom community indicated that although the level of the lake decreased, it never completely dried out, instead there was higher availability of planktic habitat and stronger mixing than in much of the Holocene. High rates of biological change observed during the late-Holocene in other records from Peru associated with human amplification of climatic signals were not observed in Lake Miski, as this lake may have been too wet and remote to be strongly influenced by human activity. Because of the presence of a woodland microrefugium, Lake Miski was suggested to have been an unusually climatically stable and wet location during the regional drying associated with the MHDE. Our new limnological information provides additional insights relating to this discussion. The presence of the observed woodland apparently withstood fluctuations that induced state changes in the lake and diatom flora, underscoring that microrefugia do not equate to ‘unchanging’ hydrologies or climates.
650			_aAndes, _951483
650			_adiatoms, _951325
650			_adrought, _950985
650			_aENSO, _951399
650			_aHolocene, _950806
650			_a limnology, _951484
650			_amicrorefugia, _951485
650			_a mid-Holocene dry event, _951486
650			_apaleoecology _951487
700			_aLaurenzi, Anne Gail _951488
700			_aValencia, Bryan G _951489
773	0		_012756 _916504 _dLondon: Sage Publication Ltd, 2019. _tHolocene/ _x09596836
856			_uhttps://doi.org/10.1177/0959683618810400
942			_2ddc _cART
999			_c12775 _d12775