Habitat--Offshore Pigeon Point, California

This part of DS 781 presents data for the habitat map of the seafloor of the Offshore of Pigeon Point map area, California. The vector data file is included in "Habitat_OffshorePigeonPoint.zip," which is accessible from http://dx.doi.org/10.5066/F7513W80
Using multibeam echosounder (MBES) bathymetry and backscatter data, potential marine benthic habitat maps were constructed. The habitats were based on substrate types and documented or "ground truthed" using underwater video images and seafloor samples obtained by the USGS. These maps display various habitat types that range from flat, soft, unconsolidated sediment-covered seafloor to hard, deformed (folded), or highly rugose and differentially eroded bedrock exposures. Rugged, high-relief, rocky outcrops that have been eroded to form ledges and small caves are ideal habitat for rockfish (Sebastes spp.) and other bottom fish such as lingcod (Ophiodon elongatus). Habitat map is presented in a map format generated in a GIS (ArcMap), and both digital and hard-copy versions will be produced.
Please refer to Greene and others (2007) for more information regarding the Benthic Marine Potential Habitat Classification Scheme and the codes used to represent various seafloor features.
References Cited:
Greene, H.G., Bizzarro, J.J., O'Connell, V.M., and Brylinsky, C.K., 2007, Construction of digital potential marine benthic habitat maps using a coded classification scheme and its application, in Todd, B.J., and Greene, H.G., eds., Mapping the seafloor for habitat characterization: Geological Association of Canada Special Paper 47, p. 141-155.

本DS 781数据集的此部分，提供了加利福尼亚州鸽子角外海制图区域的海底生境地图数据。矢量数据文件收录于"Habitat_OffshorePigeonPoint.zip"，可通过http://dx.doi.org/10.5066/F7513W80获取。

研究团队借助多波束测深声呐（multibeam echosounder, MBES）水深数据与反向散射数据，构建了潜在海洋底栖生境地图。该生境分类以底质类型为依据，并通过美国地质调查局（USGS）获取的水下视频影像与海底样本完成地面实况验证。此类地图涵盖多样生境类型，覆盖范围从平坦松软、被未固结沉积物覆盖的海底，延伸至坚硬、褶皱变形或表面崎岖不平且经差异侵蚀出露的基岩。那些被侵蚀形成岩架与小型洞穴的崎岖高起伏岩质露头，是岩鱼属（Sebastes spp.）以及裸盖鱼（Ophiodon elongatus，lingcod）等底层鱼类的理想栖息生境。本生境地图采用地理信息系统（GIS, ArcMap）生成的制图格式，将同时提供数字版与纸质版。

有关海洋底栖潜在生境分类方案及各类海底特征编码的详细信息，请参阅Greene等人（2007）的研究成果。

引用文献：
Greene, H.G.、Bizzarro, J.J.、O'Connell, V.M. 与 Brylinsky, C.K.，2007年，《基于编码分类方案的数字海洋底栖潜在生境地图构建及其应用》，收录于Todd, B.J. 与 Greene, H.G. 编辑的《用于生境表征的海底制图》，加拿大地质学会特刊第47号，第141-155页。