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Stable isotopes, marine paleoclimate...

Southern Methodist University.

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Stable isotopes, marine paleoclimates, and human subsistence on California's Channel Islands.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Stable isotopes, marine paleoclimates, and human subsistence on California's Channel Islands./
作者:	Robbins, John A.
面頁冊數:	163 p.
附註:	Adviser: Robert Gregory.
Contained By:	Masters Abstracts International45-05.
標題:	Anthropology, Archaeology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1442835

Stable isotopes, marine paleoclimates, and human subsistence on California's Channel Islands.
Robbins, John A.

Stable isotopes, marine paleoclimates, and human subsistence on California's Channel Islands. - 163 p.

Adviser: Robert Gregory.

Thesis (M.S.)--Southern Methodist University, 2007.

Oxygen isotope ratio determinations from five shellfish species ( M. californianus, Haliotis cracherodii, H. rufescens, Chione fluctifraga, and C. undatella) from San Miguel and Santa Rosa islands were used to infer temperature and salinity fluctuations in order to constrain the impacts of climate change on the cost and efficiency of human subsistence strategies. Two archaeological topics are explored with the data. The first is a test of the Marine Cooling Hypothesis of Glassow (1993), which suggests that cooler sea surface temperatures drove subtidal red abalones temporarily into the intertidal zone, while the second addresses environmental change at Abalone Rocks Estuary.Subjects--Topical Terms:

622985
Anthropology, Archaeology.

Stable isotopes, marine paleoclimates, and human subsistence on California's Channel Islands.
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035 $a (UMI)AAI1442835
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100 1 $a Robbins, John A. $3 1029068
245 1 0 $a Stable isotopes, marine paleoclimates, and human subsistence on California's Channel Islands.
300 $a 163 p.
500 $a Adviser: Robert Gregory.
500 $a Source: Masters Abstracts International, Volume: 45-05, page: 2387.
502 $a Thesis (M.S.)--Southern Methodist University, 2007.
520 $a Oxygen isotope ratio determinations from five shellfish species ( M. californianus, Haliotis cracherodii, H. rufescens, Chione fluctifraga, and C. undatella) from San Miguel and Santa Rosa islands were used to infer temperature and salinity fluctuations in order to constrain the impacts of climate change on the cost and efficiency of human subsistence strategies. Two archaeological topics are explored with the data. The first is a test of the Marine Cooling Hypothesis of Glassow (1993), which suggests that cooler sea surface temperatures drove subtidal red abalones temporarily into the intertidal zone, while the second addresses environmental change at Abalone Rocks Estuary.
520 $a One hundred ninety-one samples were analyzed from seven Middle Holocene archaeological sites (SMI-161, -163, -172, -396, -557, -608; SRI-191) to determine the relationship between temperature and resource availability. These data demonstrate a decrease in temperatures from surf zone mussels to intertidal black abalones and finally subtidal red abalones. A new model is presented in which spatial temperature variations rather than changes in sea surface temperature over time are the dominant force affecting the nature and location of red abalone middens during the Middle Holocene.
520 $a The Abalone Rocks Estuary on the east coast of Santa Rosa Island is the only well-documented Holocene estuary on the Northern Channel Islands and was exploited by islanders until around 5000 BP. Venus clams (Chione spp.) from three sites (SRI-77, -191, -667) were analyzed isotopically to determine the timing and cause of the demise of this estuary. Oxygen isotope values from 15 samples demonstrate a trend of lowering salinity in the estuary over the course of the Middle Holocene, suggesting that freshwater input resulting from a higher water table caused by the rising sea level produced a habitat too brackish for abundant shellfish to exist.
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