2021
Oxygen isotopes in terrestrial gastropod shells track Quaternary climate change in the American Southwest
RECH, Jason A., Jeffrey S. PIGATI, Kathleen B. SPRINGER, Stephanie BOSCH, Jeffrey Clark NEKOLA et. al.Základní údaje
Originální název
Oxygen isotopes in terrestrial gastropod shells track Quaternary climate change in the American Southwest
Autoři
RECH, Jason A. (garant), Jeffrey S. PIGATI, Kathleen B. SPRINGER, Stephanie BOSCH, Jeffrey Clark NEKOLA (840 Spojené státy, domácí) a Yurena YANES
Vydání
Quaternary Research, NEW YORK, Cambridge University Press, 2021, 0033-5894
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10700 1.7 Other natural sciences
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 2.797
Kód RIV
RIV/00216224:14310/21:00123431
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000720829800006
Klíčová slova anglicky
Terrestrial gastropods; Oxygen isotopes; Paleoclimate; Paleowetland deposits
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 31. 3. 2022 10:12, Mgr. Marie Šípková, DiS.
Anotace
V originále
Recent studies have shown the oxygen isotopic composition (delta O-18) of modern terrestrial gastropod shells is determined largely by the delta O-18 of precipitation. This implies that fossil shells could be used to reconstruct the delta O-18 of paleo-precipitation as long as the isotopic system, including the hydrologic pathways of the local watershed and the gastropod systematics, is well understood. In this study, we measured the delta O-18 values of 456 individual gastropod shells collected from paleowetland deposits in the San Pedro Valley, Arizona that range in age from ca. 29.1 to 9.8 ka. Isotopic differences of up to 2 parts per thousand were identified among the four taxa analyzed (Succineidae, Pupilla hebes, Gastrocopta tappaniana, and Vallonia gracilicosta), with Succineidae shells yielding the highest values and V. gracilicosta shells exhibiting the lowest values. We used these data to construct a composite isotopic record that incorporates these taxonomic offsets, and found shell delta O-18 values increased by similar to 4 parts per thousand between the last glacial maximum and early Holocene, which is similar to the magnitude, direction, and rate of isotopic change recorded by speleothems in the region. These results suggest the terrestrial gastropods analyzed here may be used as a proxy for past climate in a manner that is complementary to speleothems, but potentially with much greater spatial coverage.