NSW Fish Community Status NSW DPI Fisheries 20150305

## **Abstract** \n\nThis data and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are represented here as originally supplied:\n\n\n\nThe 2015 status of fish species at each river reach across NSW. Fish community data was collected from three years of biological surveys across NSW. Within the framework of the Australian Hydrological Geospatial Fabric V2 surface hydrology network, this was combined with attributes from the National Environmental Stream Attributes Database and River Styles® geomorphology. Generalised Additive Modelling (GAM) was used to predict a fish community status for each river reach.\n\nThe methods used to create the NSW Fish Community Status 2015 are described fully in: NSW Department of Primary Industries (2015), NSW Fish Community Status 2015 - Final Report.\n\n## **Purpose** \n\nThe dataset has a number of primary functions including but not limited to;\n\n\\* spatially representing the status of fish communities at river reach scale across NSW\n\n\\* providing additional support to strategic planning frameworks to ensure they effectively integrate biodiversity considerations into planning and decision making processes\n\n## **Dataset History** \n\nThis data and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are represented here as originally supplied:\n\n\n\nFish community data was collected from three years of biological surveys across NSW. Within the framework of the Australian Hydrological Geospatial Fabric V2 surface hydrology network, this was combined with attributes from the National Environmental Stream Attributes Database and River Styles®geomorphology.Generalised Additive Modelling (GAM) was used to predict a fish community status for each river reach.For the majority of estuarine river reaches the fish community values were derived from Roper T, Creese B, Scanes P, Stephens K, Williams R, Dela-Cruz J, Coade G, Coates B & Fraser M 2011, Assessing the condition of estuaries and coastal lake ecosystems in NSW, Monitoring, evaluation and reporting program, Technical report series, Office of Environment and Heritage, Sydney. The fish metrics were very similar but values were for the whole estuary, not river reach.\n\n\n\nFish community data was collected from 646 sampling locations within the South-East Coast, Murray-Darling Basin, Bulloo and Lake Eyre Basin drainage divisions of NSW collected between January 2009 and December 2011. Sampling was based on a standardised Sustainable Rivers Audit (SRA) electrofishing and bait-trap protocol. The overall Fish Community Status was derived from three condition indicators - expectedness, nativeness and recruitment.The index was then partitioned into five equal bands to rate the condition of the fish community; "Very Good", "Good", "Moderate", "Poor", or "Very Poor".\n\n\n\nThe Expectedness Indicator represents the proportion of native species that are now found within NSW, compared to that which was historically present. The Expectedness Indicator is derived from two input metrics; the observed native species richness over the expected species richness at each site, and the total native species richness observed within the zone over the total number of species predicted to have existed within the zone historically. \n\n\n\nThe Nativeness Indicator represents the proportion of native versus alien fishes within the river. The Nativeness Indicator is derived from three input metrics; proportion native biomass, proportion native abundance and proportion native species.\n\n\n\nThe Recruitment Indicator represents the recent reproductive activity of the native fish community within each altitude zone. The Recruitment Indicator is derived from three input metrics; the proportion of native species showing evidence of recruitment at a minimum of one site within a zone, the average proportion of sites within a zone at which each species captured was recruiting, and the average proportion of total abundance of each species that are new recruits.\n\n\n\nThe Australian Hydrological Geospatial Fabric V2 surface hydrology network (Geofabric) is a fully connected and directed stream network based a 9 second DEM. It allocates a unique stream segment number to each river reach in Australia. The Environmental Attributes Database is a set of lookup tables supplying attributes describing the natural and anthropogenic characteristics of the stream and catchment environment that was developed by the Australian National University (ANU) in 2011 and updated in 2012. The data is supplied as part of the supplementary Geofabric products which is associated with the 9 second DEM derived streams and the National Catchment Boundaries based on 250k scale stream network. 30 Stream variables were assessed for the modelling.\n\n\n\nRiver Styles®provides a high resolution categorical classification of river character within a nested hierarchy of criteria based on valley setting, channel planform, geomorphic units, and bed material. The NSW Office of Water compiled a spatial dataset of River Styles®classifications for a large number of the waterways of NSW. From 65 River Style®categories we generated two new fields representing Planform (34 categories) and Substratum (8 categories) for each stream segment. River Style®planform and substratum categories were then assigned to each Geofabric segment.\n\n\n\nGeneralised Additive Modelling (GAM) analysis was used to model relationships between the fish assemblage metrics/indicators/index with the environmental and River Style®attributes of stream segments. Only stream segments with a modelled average daily flow of more than five megalitres were selected for output. The predicted values for each river reach were converted from the Geofabric framework to the higher resolution 2013 NSW Strahler Stream Order Hydroline.\n\n\n\nUse limitations\n\n\n\nThe information contained in this publication is based on knowledge and understanding at the time of writing (February 2015). However, because of advances in knowledge, users are reminded of the need to ensure that the information upon which they rely is up to date and to check the currency of the information with the appropriate officer of the Department of Trade and Investment, Regional Infrastructure and Services or the user's independent adviser. Recognising that some of the information in this document is provided by third parties, the State of New South Wales, the author and the publisher take no responsibility for the accuracy, currency, reliability or correctness of any information included in the document provided by third parties.\n\n## **Dataset Citation** \n\nNSW Department of Primary Industries (2015) NSW Fish Community Status NSW DPI Fisheries 20150305. Bioregional Assessment Source Dataset. Viewed 12 July 2018, http://data.bioregionalassessments.gov.au/dataset/4332044c-059f-4059-bb7f-741147922243.

**摘要**

本数据集及其元数据声明由第三方提供给生物区域评估计划（Bioregional Assessment Programme），本文档按原始提交内容呈现。

本数据集涵盖新南威尔士州（New South Wales，NSW）各河段的鱼类群落2015年现状。鱼类群落数据源自新南威尔士州境内为期三年的生物调查。依托澳大利亚水文地理空间数据集V2（Australian Hydrological Geospatial Fabric V2）地表水文网络框架，本数据集结合了国家环境溪流属性数据库（National Environmental Stream Attributes Database）与River Styles®地貌学的相关属性，并采用广义加性模型（Generalised Additive Modelling, GAM）对每个河段的鱼类群落现状进行预测。

2015年新南威尔士州鱼类群落现状数据集的构建方法完整说明参见：新南威尔士州第一产业部（NSW Department of Primary Industries）于2015年发布的《2015年新南威尔士州鱼类群落现状——最终报告》。

**目的**

本数据集具备多项核心功能，包括但不限于：
* 空间呈现新南威尔士州范围内各河段尺度的鱼类群落现状
* 为战略规划框架提供额外支撑，确保规划与决策流程中有效融入生物多样性考量因素。

**数据集历史**

本数据集及其元数据声明由第三方提交至生物区域评估计划，本文档按原始提交内容呈现：

鱼类群落数据源自新南威尔士州境内为期三年的生物调查。依托澳大利亚水文地理空间数据集V2（Australian Hydrological Geospatial Fabric V2）地表水文网络框架，本数据集结合了国家环境溪流属性数据库（National Environmental Stream Attributes Database）与River Styles®地貌学的相关属性，并采用广义加性模型（Generalised Additive Modelling, GAM）对每个河段的鱼类群落现状进行预测。针对大多数河口河段，鱼类群落数值源自Roper T、Creese B、Scanes P、Stephens K、Williams R、Dela-Cruz J、Coade G、Coates B与Fraser M于2011年发表的《评估新南威尔士州河口与沿海湖泊生态系统状况》（收录于监测、评估与报告计划技术报告系列，新南威尔士州环境与遗产局，悉尼）。本次研究采用的鱼类群落指标与之高度相似，但原研究数值基于整个河口而非单个河段。

2009年1月至2011年12月期间，研究人员在新南威尔士州东南海岸、墨累-达令盆地、Bulloo流域与艾尔湖盆地的646个采样点采集鱼类群落数据。采样采用标准化的可持续河流审计（Sustainable Rivers Audit, SRA）电捕鱼与诱饵诱捕方案。整体鱼类群落现状评分基于三项状况指标：预期性（expectedness）、本土性（nativeness）与补充繁殖（recruitment）。随后将该指数划分为五个均等区间，用于评定鱼类群落状况："极佳"、"良好"、"中等"、"较差"、"极差"。

**预期性指标**：用于表征当前新南威尔士州境内发现的本土鱼类物种占历史存在物种的比例。该指标基于两项输入指标计算得到：各采样点观测到的本土物种丰富度与预期物种丰富度的比值，以及研究区域内观测到的总本土物种丰富度与该区域历史上预测存在的总物种数的比值。

**本土性指标**：用于表征河流中本土鱼类与外来鱼类的占比关系。该指标基于三项输入指标计算得到：本土鱼类生物量占比、本土鱼类个体数量占比与本土鱼类物种占比。

**补充繁殖指标**：用于表征各海拔带内本土鱼类群落近期的繁殖活动状况。该指标基于三项输入指标计算得到：在研究区域内至少一个采样点显示出繁殖迹象的本土物种占比，研究区域内各捕获物种出现繁殖迹象的采样点平均占比，以及各物种新补充个体的总丰度占比的平均值。

澳大利亚水文地理空间数据集V2地表水文网络（Geofabric）是基于9秒分辨率数字高程模型（Digital Elevation Model, DEM）构建的全连通有向溪流网络，为澳大利亚每个河段分配唯一的溪流分段编号。**国家环境溪流属性数据库**是澳大利亚国立大学（Australian National University, ANU）于2011年开发、2012年更新的属性查找表集合，用于描述溪流与集水区环境的自然与人为特征。本数据集作为Geofabric补充产品的一部分提供，该补充产品关联基于9秒分辨率DEM生成的溪流网络以及基于25万比例尺溪流网络划定的国家集水区边界。本次建模共评估了30项溪流变量。

**River Styles®**是基于河谷地貌、河道平面形态、地貌单元与河床物质的嵌套分级标准，对河流特征进行高分辨率分类的体系。新南威尔士州水务局（NSW Office of Water）已为新南威尔士州大量水道编制了River Styles®分类空间数据集。研究人员从65个River Styles®分类中为每个溪流分段生成了两个新字段：分别代表平面形态（34个分类）与河床基质（8个分类）。随后将River Styles®平面形态与河床基质分类分配至每个Geofabric分段。

研究采用广义加性模型（Generalised Additive Modelling, GAM）分析鱼类群落指标/指标体系/指数与溪流分段的环境属性及River Styles®属性之间的关联关系。仅将建模得出的日均流量超过5兆升的溪流分段纳入最终输出。随后将各河段的预测值从Geofabric框架转换为更高分辨率的2013年新南威尔士州斯特拉勒河道等级水文线（Strahler Stream Order Hydroline）。

**使用限制**

本出版物所载信息基于2015年2月撰写时的认知与研究成果。鉴于相关知识的不断更新，提醒用户需确保所依赖的信息为最新版本，并可向新南威尔士州贸易、投资与区域基础设施服务部的相关负责人或用户的独立顾问核实信息的时效性。鉴于本文件部分信息由第三方提供，新南威尔士州政府、作者与出版方不对第三方提供的任何信息的准确性、时效性、可靠性与正确性承担责任。

**数据集引用**

新南威尔士州第一产业部（NSW Department of Primary Industries）（2015）《2015年新南威尔士州鱼类群落现状》，新南威尔士州第一产业部渔业处，20150305。生物区域评估源数据集。2018年7月12日查阅，来源：http://data.bioregionalassessments.gov.au/dataset/4332044c-059f-4059-bb7f-741147922243。