2. Seawater
Seawater-buffer solution, PH7.4-8.5
Salt composition(盐组成) Temperature(温度) Dissolved gases(溶解气体) Transparence (透明度) Pressure(压力) Instrument for measurements(测量仪 器)
分泌物、 排泄物、 分解物、 代谢物、 陆源排海
2、Salinity(盐度)
• Salinity is defined as the total amount of salt dissolved in seawater. • Salinity is usually expressed as the number of grams of salt left behind when 1,000 grams of seawater are evaporated. • 1000g海水蒸发后留下的所有盐类的克数 • The average salinity of the ocean is about 35‰.
Terms
• 潮间带(littoral):从高潮时到低潮时海 水经历的地带,是陆地与海洋之间的过渡 地带 • 潮下带(sub-littoral):不超过200m的 水层区,海底地形较为平坦,坡度较小, 以大陆缘为外界 • 真光层(euphotic layer ):0-50米的水 层。这里水温和光照的昼夜变化和季节变 化都很强,易受风浪影响,是海洋浮游植 物丰富的海区。
2.4 Transparence
One of the most biologically important properties of seawater is that it is relatively transparent