A Survey of the Macrocystis pyrifera (L.) C. Agardh Stocks on the East Coast of Tasmania, 1986

A survey of the east Tasmanian coastline from Musselroe Bay to South East Cape revealed a total of 10 km2 of Macrocystis pyrifera (Linnaeus) C. Agardh 1820 kelp forest. Average harvestable quantities based on Alginates (Australia) Company records (1965-72) show that cropping can expect to yield 5 ton/acre or 1.23 kg/m2. This realizes a total of 12,300 tonne available on the East Coast of Tasmania in 1986. Review of past records show fluctuations in total amounts harvested, due possibly to factors such as high oceanic water temperatures with subsequent low nutrient concentrations and storm damage.\nThe survey was conducted from a light aeroplane. Areas of Macrocystis pyrifera beds were marked on 1:100,000 topographical land tenure maps using landmarks as references. Digitising of bed outlines on maps was done using Mapinfo.\nWeight of Macrocystis per unit area is also estimated from quadrats harvested at a number of sites along the coast.

对塔斯马尼亚州东海岸从淡菜湾（Musselroe Bay）至东南角（South East Cape）开展的海洋调查显示，该区域总计分布有10平方千米的巨藻（Macrocystis pyrifera (Linnaeus) C. Agardh 1820）林。根据澳大利亚海藻酸盐（Alginates (Australia)）公司1965年至1972年的运营记录估算的平均可采收量表明，巨藻养殖的预期产量可达5吨/英亩，折合1.23千克/平方米。据此可推算，1986年塔斯马尼亚东海岸的巨藻总可采收资源量可达12300公吨。对历史采收记录的复盘显示，巨藻总采收量存在明显波动，潜在影响因素包括海洋水温异常升高、随之而来的营养盐浓度下降以及风暴破坏。
本次调查通过轻型飞机完成。研究人员以实地地标为参照，在1:100000比例尺的地形土地权属地图上标注巨藻床的分布范围。随后借助Mapinfo软件对地图上的巨藻床轮廓进行数字化处理。研究人员还通过在海岸沿线多个站点采集的植被样方，进一步估算了单位面积巨藻的生物量。