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.

对塔斯马尼亚东海岸从穆塞尔罗湾到东南角的调查显示，该区域共有10平方千米的巨藻（Macrocystis pyrifera (Linnaeus) C. Agardh 1820）林。根据澳大利亚藻酸盐公司（Alginates (Australia)）1965至1972年的记录，可采收量的平均值显示，该巨藻的采收产量可达5吨/英亩，即1.23千克/平方米。以此推算，1986年塔斯马尼亚东海岸的可利用巨藻总储量达12300吨。对历史记录的复盘显示，总采收量存在波动，其诱因可能包括海洋水温过高导致后续营养盐浓度降低，以及风暴破坏等因素。
本次调查通过轻型飞机开展。调查人员以地标为参照，在1:100000比例尺的地形土地权属地图上标记出巨藻床的分布区域。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样方，估算出单位面积巨藻的重量。