Land tenure and landscape change: a comparison of public-private lands in the southern High Plains
Land tenure and landscape change: a comparison of public-private lands in the southern High Plains
复制标题
土地保有权和景观变化：高原南部公私土地的比较
DOI：
10.1186/s13717-016-0056-2
复制
发表时间：
2016
影响因子：
4.8
通讯作者：
A. K. Graham
中科院分区：
文献类型：
--
作者：
T. Fagin;Jacqueline M. Vadjunec;Nicole M. Colston;K. Wenger;A. K. Graham
大平原南部的长期干旱增加了各种尺度上人类-环境耦合系统的脆弱性。随着长期建立的土地使用制度在气候变化、资源枯竭和不断演变的治理面前崩溃，更好地理解区域尺度的动态将变得越来越重要。为了证明在干旱期间的不同脆弱性，这项研究假设，观察到的增加在草地上的木本植被将不同的土地保有制度。我们认为，在国家信托土地治理的差异，在一定程度上，导致差异的土地管理做法，有助于景观changes.MethodsThe研究领域包括相邻的县，西马龙县在俄克拉荷马州和联合县在新墨西哥州，具有类似的气候变化和农业经济。利用国家土地覆盖数据库（NLCD）1992 - 2011年的土地覆盖图，分析了1992 - 2011年的景观组成和结构变化。然而，在整个研究区域的组成和结构都发生了变化，特别是草本植被的损失和木本植被的增加。木本植被的最大收益发生在西马龙县的国家信托土地。总体而言，数据表明，草本植被的碎片化和灌木丛patchs.ConclusionsResearch土地使用权对土地管理决策的影响，特别是国家信托土地租赁在过度放牧的作用，通知干旱管理在南部大平原的更广泛的背景下。建议包括继续开展研究，以突出土地保有权治理中推动地貌变化的具体机制。
IntroductionLong-term drought in the southern Great Plains increases the vulnerability of coupled human-environment systems at a variety of scales. Developing better understandings of the dynamics at regional scales will become increasingly important as long-established land-use regimes break down in the face of climate change, resource depletion, and evolving governance. To demonstrate differential vulnerability during drought periods, this study hypothesized that observed increases in woody vegetation in grasslands would vary across land-tenure regimes. We argue that differences in State Trust Land governance, in part, lead to differential land management practices that contribute to landscape change.MethodsThe study area encompasses adjacent counties, Cimarron County in Oklahoma and Union County in New Mexico, with similar climate variability and agricultural economies. We analyzed National Land Cover Database (NLCD) land-cover maps from 1992 and 2011 to assess changes in landscape composition and structure between 1992 and 2011.ResultsDuring both years under consideration, each county in the study region, across various land-tenure regimes, was dominated by herbaceous vegetation. However, there were changes in both composition and structure across the whole study area, in particular losses of herbaceous vegetation and increases in woody vegetation. The greatest gains in woody vegetation occurred in State Trust Lands of Cimarron County. Overall, the data suggest a fragmentation of herbaceous vegetation and a coalescing of shrubland patches.ConclusionsResearch about the influence of land tenure on land management decisions, specifically the role of State Trust Land leases in overgrazing, informs the broader context of drought management in the southern Great Plains. Recommendations include continued research to highlight the specific mechanisms of land-tenure governance that drive landscape change.