Edwards Brian D, Dartnell Peter, Chezar Henry
US Geological Survey, 345 Middlefield Road, MS 999, Menlo Park CA 94025, USA.
Mar Environ Res. 2003 Jul-Aug;56(1-2):47-66. doi: 10.1016/S0141-1136(02)00324-0.
Seafloor photography from three cruises is combined with multibeam sonar imagery to characterize benthic substrates and associated fauna of Santa Monica Bay, California. The multibeam EM1000 imagery was collected in 1996. Two sampling cruises (in 1998 and 1999) provided photographs at 142 sites throughout the Bay; a final cruise (in 2000) collected still photographs and continuous video along nine transects on the mainland shelf from Pt. Dume to the Palos Verdes peninsula. Muddy substrates (typically low backscatter) were the predominant habitat throughout the Santa Monica Bay, from the 20 m isobath to the adjacent Santa Monica basin floor (780 m). Bioturbation was pervasive as evidenced by abundant open burrows, mounds, and faunal tracks and trails. Sandy substrates (typically intermediate to high backscatter) were restricted to the innermost mainland shelf and a narrow outer shelf band north of Santa Monica Canyon. Cobble and gravel substrates (high backscatter) were restricted to the innermost shelf south of El Segundo and limited parts of the shelf edge. Rocky substrates (high backscatter) with interspersed patches of sand and gravel occurred on the high-relief marginal plateau and along parts of the shelf break offshore of Malibu.
来自三次巡航的海底照片与多波束声呐图像相结合，以描述加利福尼亚州圣莫尼卡湾的底栖基质及相关动物群。多波束EM1000图像于1996年采集。两次采样巡航（1998年和1999年）在整个海湾的142个地点提供了照片；最后一次巡航（2000年）沿着从杜梅角到帕洛斯维德斯半岛的大陆架上的九条断面采集了静止照片和连续视频。从20米等深线到相邻的圣莫尼卡海盆底（780米），泥质基质（通常后向散射较低）是整个圣莫尼卡湾的主要栖息地。大量的开放洞穴、土堆以及动物的足迹和踪迹表明生物扰动很普遍。砂质基质（通常后向散射中等至高）仅限于最内侧的大陆架以及圣莫尼卡峡谷以北的一条狭窄的外陆架带。卵石和砾石基质（后向散射高）仅限于埃尔塞贡多以南的最内侧陆架和陆架边缘的有限部分。高起伏的边缘高原以及马里布近海部分陆架断裂处分布着布满沙砾斑块的岩石基质（后向散射高）。
