Desert Uplands Plot Network: Spatial data

Abstract: The LTERN Desert Uplands Plot Network Plot Details - Spatial Coordinates contains location data for 60 permanent 1 hectare plots in Northern Queensland, Australia. All sites are located within extensive ironbark (Eucalyptus whitei and E. melanophloia) woodland in the Prairie-Torrens Creeks subregion in the northwest of the Desert Uplands bioregion. The sites extend across four leasehold cattle properties that lie within an area approximately 50 km by 50 km. The sites occur on alluvial sand and clay sheets, and flat sand and earth plains. The Desert Uplands research plots commenced in 2004, and have been revisited in 2005, 2006, 2008, 2013, 2014 and 2016. A synopsis of related data packages which have been collected as part of the Desert Uplands Plot Network’s full program is provided at http://hdl.handle.net/1885/151949. Sampling method: The specific location of the 1 ha survey sites were selected on the basis that they were situated in large contiguous areas that were considered typical or characteristic of the respective vegetation management strategy. Within each property, sites are generally a minimum of 1 km apart but may be within 500 m of one another in some cases. At the property scale, sites are spread across a 10-15 km radius on each property. Sites are located a minimum of 500 m from any water point, commonly 50-100 m from the nearest access track and that the demarcation used for site selection within the “Unmodified vegetation management” class (30-45% vs. 45-60% canopy cover), was made using crown canopy mapping based on 1996 1:250 000 aerial photography. Sites are broadly situated within the same broad Ironbark woodland community (Eucalyptus whitei, E. melanophloia). Two Queensland land zones are mapped across the four properties with sandy plains and alluvial systems each represented by two properties. One of the leaseholders (with five thinned and five unmodified sites), withdrew from the study following the July 2008 survey leaving 50 sites distributed across three leasehold properties remaining in the study. Study extent: These plots have been visited in 2004, 2005, 2006, 2008, 2013, 2014 and 2016. Between 2012 and 2018 this project has been part of the Long Term Ecological Research Network (LTERN). LTERN is a Facility within the Terrestrial Ecosystem Research Network (TERN) and supported by the Australian Government through the National Collaborative Research Infrastructure Strategy.

摘要：长期生态研究网络（Long Term Ecological Research Network，LTERN）沙漠高地样地网络样地详情——空间坐标包含澳大利亚昆士兰州北部60个永久性1公顷样地的位置数据。所有样地均位于沙漠高地生物区西北部的普拉里-托伦斯溪亚区的大片硬皮桉（Eucalyptus whitei与E. melanophloia）林地内。样地分布于总面积约50千米×50千米范围内的4个租赁肉牛牧场，坐落于冲积砂质黏土滩与平坦的砂质、土质平原之上。沙漠高地研究样地于2004年设立，并分别于2005、2006、2008、2013、2014及2016年开展重访调查。沙漠高地样地网络完整项目所收集的相关数据集概览可通过http://hdl.handle.net/1885/151949获取。
采样方法：本研究的1公顷调查样地选址遵循以下原则：样地位于符合对应植被管理策略典型特征的大型连续区域内。各牧场内的样地间距通常不小于1千米，但部分样地间距可缩短至500米以内。单牧场范围内，样地分布于半径10-15千米的区域内。样地与任何水源的最小间距不小于500米，通常距最近通行道路50-100米；针对"未改良植被管理"类（冠层覆盖度30%-45%与45%-60%）的样地划分，基于1996年1:25万航空摄影生成的冠层测绘图完成。所有样地均隶属于同一大类硬皮桉林地群落（Eucalyptus whitei、E. melanophloia）。4个牧场覆盖昆士兰州2类土地带：砂质平原与冲积系统各对应2个牧场。其中1名租赁方（对应5个间伐样地与5个未改良样地）于2008年7月的调查后退出本研究，最终剩余50个样地分布于3个租赁牧场中。
研究范围：本研究样地分别于2004、2005、2006、2008、2013、2014及2016年开展调查。2012年至2018年间，本项目隶属于长期生态研究网络（LTERN）。LTERN是陆地生态系统研究网络（Terrestrial Ecosystem Research Network，TERN）下设的设施，由澳大利亚政府通过国家协同研究基础设施计划提供资助。