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首页> 外文期刊>Transactions in GIS: TG >Modeling the Pre-Euroamerican Landscape with Government Land Office Surveys and Geostatistics
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Modeling the Pre-Euroamerican Landscape with Government Land Office Surveys and Geostatistics

机译：使用政府土地局的调查和地统计学来模拟前美洲风景

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摘要

Forested areas in the United States have been altered since the time of European settlement. There is increasing interest in comparing present day vegetation with that of the Pre-Euroamerican era to understand what changes have occurred in some of our more outstanding natural areas. Studies have been conducted using Government Land Office (GLO) notes to understand historic vegetation surveys, but past studies focused on species present/absent lists. The GLO surveys included information about tree species, tree diameter and other physical features. This study used indicator kriging to interpolate the probability of tree species on the landscape using the GLO data from 62 townships. Once continuous probability models were developed, vegetation spatial patterns were analyzed throughout the sub-basin. This technique provided insight into what the vegetation pattern (spatially) was like prior to Euroamerican settlement within the Buffalo River sub-basin. It provided the base information necessary to quantify vegetation change and the spatial extent of that change. Based on this research it appears that post-Euroamerican fire suppression and agricultural practices with other human activities have been major contributors to change. Eastern Redcedar (Juniperious virginiana) and hickory (Carya sp.) have increased, while oak species (Quercus sp.) have decreased. Additionally 19% of the sub-basin has changed to non-forest.
机译：自欧洲定居以来，美国的林区已经发生了变化。人们越来越有兴趣将当今的植被与前欧洲时期的植被进行比较，以了解我们一些更杰出的自然地区发生了什么变化。已经使用政府土地局（GLO）的注释进行了研究，以了解历史植被调查，但是过去的研究集中在物种的现存/缺失清单上。 GLO调查包括有关树木种类，树木直径和其他物理特征的信息。这项研究使用指标克里金法，使用来自62个乡镇的GLO数据来插值树木在景观上的概率。一旦建立了连续概率模型，就对整个子流域的植被空间格局进行了分析。这项技术提供了深入了解布法罗河次流域内欧洲移民之前植被格局（空间）的方式。它提供了量化植被变化及其空间范围所需的基本信息。根据这项研究，看来后欧洲的灭火和农业活动以及其他人类活动是造成这种变化的主要因素。东部红柏（Juniperious virginiana）和山核桃（山核桃（Carya sp。））增加，而橡树种（栎（Quercus sp。））减少。另外，有19％的流域已改为非森林。

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