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Soil characteristics associated with agricultural enclosures (Manavai) on Rapa Nui

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Title:Soil characteristics associated with agricultural enclosures (Manavai) on Rapa Nui
Authors:Wofford, Gabriel
Contributors:Hunt, Terry (advisor)
Deenik, Jonathan (advisor)
Oceanography (department)
Global Environmental Science (department)
Date Issued:2006
Publisher:University of Hawaiʻi at Mānoa
Place of Publication:Honolulu
Abstract:Some scholars argue that human-induced environmental changes on Rapa Nui
(Easter Island) led to the collapse of the island’s population and its culture. This project
investigates changes to agricultural soils. Sediment samples were taken from several
manavai, agricultural enclosures, at Maitaki Te Moa and Anakena. Samples were taken
both inside and outside the manavai to test soils associated with agricultural use.
Sediment samples were analyzed for several properties: pH, percent nitrogen (%N),
percent organic carbon (%OC), and the cations phosphorus (P), potassium (K), calcium
(Ca), and magnesium (Mg). These data were indicative of changing soil properties and
can show human alterations. I tested the null hypotheses to compare soils inside and
outside manavai; in the event of a significant difference the hypothesis was rejected,
indicating anthropogenic alterations. Overall trends indicate a major difference in soils
from the two regions as well as human influences inside the manavai.
Pages/Duration:46 pages
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Rights Holder:Wofford, Gabriel
Appears in Collections: Global Environmental Science (GES)

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