Health and Status of Seagrass in Cockburn Sound, Owen Anchorage and Warnbro Sound: 1998 to 2008

Since 1998, a survey of seagrass health has been repeated annually between Stragglers Rocks and Warnbro Sound in the Perth metropolitan waters, in January, on behalf of DEC (Department of Environment and Conservation) and CSMC (Cockburn Sound Management Council). The survey has incorporated measurements of several quantitative variables at each assessment site, and also established a series of permanent transects over the lower depth limit of seagrass meadows at four different sites.\n\nParameters measured (some were measured only in some years) include: \n- Seagrass shoot density \n- Shoot height (maximum) \n- Shoot height (average) \n- Leaf productivity \n- Seagrass above ground biomass \n- Epiphyte biomass \n- Photoquadrats \n- Photography of leaves \n- Video transect \n- Videography of leaves \n- Canopy cover (%) \n- Meadow cover (%) \n- Epiphyte cover (%)\n- Epiphyte composition \n- Rhizome mat \n- Coloniser species

自1998年起，受环境与保护部（Department of Environment and Conservation, DEC）与科克本湾管理委员会（Cockburn Sound Management Council, CSMC）委托，项目组于每年1月在珀斯都市区海域的斯特拉格斯岩（Stragglers Rocks）与万布罗湾（Warnbro Sound）之间开展海草健康状况年度跟踪调查。

本次调查在每个评估点位采集多项定量变量数据，并在4个不同点位的海草床下限深度处布设了一系列永久样带。

本次测量的参数（部分参数仅在部分年份开展）包括：
- 海草分株密度
- 分株最大高度
- 分株平均高度
- 叶片生产力
- 海草地上生物量
- 附生生物量
- 照片样方（Photoquadrats）
- 叶片摄影
- 视频样带（Video transect）
- 叶片摄像
- 冠层覆盖率（%）
- 海草床覆盖率（%）
- 附生生物覆盖率（%）
- 附生生物组成
- 根状茎垫
- 拓殖物种