Ua kapa ʻia ka oxygen molekala i hoʻoheheʻe ʻia i loko o ka wai a ua kapa ʻia ʻo D0. ʻO ka nui o ka oxygen i hoʻoheheʻe ʻia i ka wai ʻili he 5-10mg/L. Ke loaʻa nā makani ikaika a me nā nalu, hiki i ka oxygen dissolved i ka wai ke hiki i 14mg/L. Dissolved oxygen saturation = ana waiwai o ka dissolved oxygen/dissolved oxygen saturation ma lalo o nā kūlana i ana ʻia * 100%, ʻo ia hoʻi, 90% a ma luna, ʻoi aku ka nui o ke ana ma luna o 7.5 mg/L, a ʻo ka liʻiliʻi he 2 mg/L.
Haʻahaʻa-oxygenwaie hele i nā mea kanu a wehe i ka oxygen mai ka ʻōnaehana kumu. Pēlā nō, e hoʻopau ka oxygen i ka lepo. Pono nā mea kanu olakino a me nā pua lepo maikaʻi i ka oxygen ma kēia mau ʻāpana ʻelua.
ʻO ka nele o ka oxygen i hoʻoheheʻe ʻia i loko o ka wai hiki ke hana i nā pilikia ʻē aʻe. No ka laʻana, nā nematodes e like me ka lepo hypoxic. ʻO ka hoʻoulu ʻana i nā mea kanu me ka wai haʻahaʻa-oxygen e hoʻokokoke iā lākou i ka ʻili a e hōʻino maʻalahi i nā aʻa o nā mea kanu.
Ua hōʻike ʻia nā haʻawina ʻo ka hōʻemi ʻana i ka neʻe ʻana o ka oxygen dissolved i loko o ke aʻa o nā mea kanu e hōʻemi i ka hiki o nā mea kanu ke komo i ka nitrogen a me ka wai. ʻO ka nele o ka oxygen hiki ke hōʻino i nā aʻa. I ke kaʻina hana o ka hoʻololi ʻana i nā haʻahaʻa haʻahaʻa o ka oxygen dissolved, ua loli ka metabolism o nā mea kanu. Ua kapa ʻia ʻo Hypoxia i loko o ka mea kanu. ʻO kekahi o nā hopena, ʻo ia ka hoʻohaʻahaʻa ʻana o ka sucrose, a huli nā mea kanu i nā ala e hoʻopakele ai i ka ikehu e uku ai i ka nele o ka oxygen.
ʻO ka photosynthesis o ka phytoplankton ke kumu nui o ka oxygen i loko o nā loko, ma ke ʻano he 56% -80% o ke kumu oxygen; ʻo ke koena mai ka makani a me nā nalu, i hoʻoheheʻe ʻia ka oxygen i ka lewa i loko o kawai. Pono 12-14mg/L
Heilongjiang: He 600-pāhāhā-mikaHiki i ka loko iʻa ke hoʻonui i ka mahana o ka wai ma 3 a 4 degere a hoʻonui i ka hua palaoa ma 6%.