Desert Uplands Plot Network: Bird Counts, 2006+

Abstract: The Desert Uplands Plot Network Bird Count Data contains bird fauna data collected at 60 1-hectare plots spanning 2006 to 2016. This is part of a larger dataset that spans from 2004 to 2016. The CSIRO permanent plots are situated in Tropical Ironbark Woodlands, and extend across four leasehold cattle properties that lie within an area approximately 50 km by 50 km. The plots represent three vegetation management strategies, namely: 1) clearing (where all trees and shrubs are removed); 2) thinning (where ground and midstorey vegetation is removed); and 3) unmodified native woodlands where significant thinning or clearing has not occurred. Within each 1 ha site, eight five-minute diurnal bird counts are conducted over a four day period. Two counts are completed per day at each site: one count in the morning within three hours of sunrise and the other a minimum of three hours after this period and before sunset. The Desert Uplands research plots commenced in 2004, and have been revisited in 2005, 2006, 2008, 2014, 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 https://doi.org/10.25911/5c343f9e98336. 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 six times so far – June 2004, May 2005, August 2006, July 2008, June-July 2013, October 2014 and May-August 2016. The 10 KALL sites were not surveyed post-2008. Project funding: Between 2012 and 2018 this project was part of, and funded through the Long Term Ecological Research Network (LTERN) a facility within the Terrestrial Ecosystem Research Network (TERN) and supported by the Australian Government through the National Collaborative Research Infrastructure Strategy.

摘要：沙漠高地样地网络鸟类计数数据集包含2006年至2016年间采集的60个1公顷样地（1-hectare plots）的鸟类区系（bird fauna）数据。该数据集隶属于覆盖2004年至2016年的更大规模数据集。澳大利亚联邦科学与工业研究组织（CSIRO）设立的永久样地位于热带硬皮桉林地（Tropical Ironbark Woodlands），分布于总面积约50km×50km的4个租赁牧牛场内。这些样地对应3种植被管理策略，分别为：1）皆伐（清除所有乔木与灌木）；2）疏伐（清除地表及中层植被）；3）未受干扰原生林地（未开展过大规模疏伐或皆伐作业）。
在每个1公顷样地中，于4天周期内开展8次5分钟日间鸟类计数。每个样地每日完成2次计数：一次为日出后3小时内的晨间时段，另一次为该时段之后至少3小时且日落前的时段。
沙漠高地研究样地于2004年设立，并分别于2005、2006、2008、2014、2014和2016年进行重访。隶属于沙漠高地样地网络完整研究计划的相关数据集包概要，可通过https://doi.org/10.25911/5c343f9e98336获取。

采样方法：1公顷调查样地的选址原则为，位于对应植被管理策略的典型连片区域内。各牧牛场内的样地间距通常不小于1km，但部分样地间距可能小于500m。单个牧牛场范围内，样地分布于半径10-15km的区域内。样地需距离任何水源点至少500m，通常距离最近通行道路50-100m；“未受干扰植被管理”类样地的冠层覆盖度划分标准（30%-45% vs 45%-60%），基于1996年1:25万航空摄影生成的树冠冠层制图确定。样地主要分布于同一大类的硬皮桉林地群落（怀特桉（Eucalyptus whitei）、黑皮桉（E. melanophloia））。昆士兰州的2个土地分区覆盖了4个牧牛场，其中沙质平原与冲积系统各对应2个牧牛场。其中1位租赁户（拥有5个疏伐样地与5个未受干扰样地）在2008年7月的调查后退出研究，剩余50个样地分布于3个租赁牧牛场中。

研究范围：截至目前，这些样地已开展6次调查：2004年6月、2005年5月、2006年8月、2008年7月、2013年6-7月、2014年10月以及2016年5-8月。10个KALL样地在2008年后未再进行调查。

项目资助：2012年至2018年间，本项目隶属于陆地生态系统研究网络（Terrestrial Ecosystem Research Network, TERN）下属的长期生态研究网络（Long Term Ecological Research Network, LTERN），并由澳大利亚政府通过国家合作研究基础设施战略提供资助。