广西植物
廣西植物
엄서식물
GUIHAIA
2014年
6期
799-805
,共7页
王培%胡清菁%曹建华%李亮
王培%鬍清菁%曹建華%李亮
왕배%호청정%조건화%리량
念珠藻%光合作用%Ca2 +%CaCO 3 沉积%HCO -3%净碳汇效应
唸珠藻%光閤作用%Ca2 +%CaCO 3 沉積%HCO -3%淨碳彙效應
념주조%광합작용%Ca2 +%CaCO 3 침적%HCO -3%정탄회효응
Nostoc%photosynthesis%Ca2+%CaCO3 precipitation%HCO-3%net carbon sink effect
岩溶碳汇过程中石灰石溶解将大气/土壤中 CO 2转移到水体形成 HCO －3促进水生藻类的生长.该文为了研究水生藻类光合作用将岩溶水中无机碳转化为有机碳的效率,采用从岩溶水生生态系统中筛选出的念珠藻作为研究对象,探讨在封闭体系中藻细胞光合作用时对典型岩溶水中 Ca2＋、HCO －3利用、藻细胞生物量的变化与 Ca2＋、HCO －3的利用关系以及体系 pH、DO 的变化.结果表明：念珠藻通过光合作用能吸收利用岩溶水中27．38％的 Ca2＋,同时将29．54％的 Ca2＋通过物理化学作用以“藻体-CaCO 3”复合体形式沉淀而返回到无机环境.pH 漂移实验表明念珠藻光合作用过程中先利用水体中游离 CO 2,然后以岩溶水中 HCO －3为碳源.由于水体中岩溶作用产生的 HCO －3不断被光合作用利用而引起体系 pH 和 DO 的升高.念珠藻光合作用将岩溶水中65％的 HCO －3转化为稳定化合物,其中18．46％以胞外 CaCO 3形式被沉淀,81．54％被藻类转化为有机物,表现为净碳汇效应.
巖溶碳彙過程中石灰石溶解將大氣/土壤中 CO 2轉移到水體形成 HCO －3促進水生藻類的生長.該文為瞭研究水生藻類光閤作用將巖溶水中無機碳轉化為有機碳的效率,採用從巖溶水生生態繫統中篩選齣的唸珠藻作為研究對象,探討在封閉體繫中藻細胞光閤作用時對典型巖溶水中 Ca2＋、HCO －3利用、藻細胞生物量的變化與 Ca2＋、HCO －3的利用關繫以及體繫 pH、DO 的變化.結果錶明：唸珠藻通過光閤作用能吸收利用巖溶水中27．38％的 Ca2＋,同時將29．54％的 Ca2＋通過物理化學作用以“藻體-CaCO 3”複閤體形式沉澱而返迴到無機環境.pH 漂移實驗錶明唸珠藻光閤作用過程中先利用水體中遊離 CO 2,然後以巖溶水中 HCO －3為碳源.由于水體中巖溶作用產生的 HCO －3不斷被光閤作用利用而引起體繫 pH 和 DO 的升高.唸珠藻光閤作用將巖溶水中65％的 HCO －3轉化為穩定化閤物,其中18．46％以胞外 CaCO 3形式被沉澱,81．54％被藻類轉化為有機物,錶現為淨碳彙效應.
암용탄회과정중석회석용해장대기/토양중 CO 2전이도수체형성 HCO －3촉진수생조류적생장.해문위료연구수생조류광합작용장암용수중무궤탄전화위유궤탄적효솔,채용종암용수생생태계통중사선출적념주조작위연구대상,탐토재봉폐체계중조세포광합작용시대전형암용수중 Ca2＋、HCO －3이용、조세포생물량적변화여 Ca2＋、HCO －3적이용관계이급체계 pH、DO 적변화.결과표명：념주조통과광합작용능흡수이용암용수중27．38％적 Ca2＋,동시장29．54％적 Ca2＋통과물이화학작용이“조체-CaCO 3”복합체형식침정이반회도무궤배경.pH 표이실험표명념주조광합작용과정중선이용수체중유리 CO 2,연후이암용수중 HCO －3위탄원.유우수체중암용작용산생적 HCO －3불단피광합작용이용이인기체계 pH 화 DO 적승고.념주조광합작용장암용수중65％적 HCO －3전화위은정화합물,기중18．46％이포외 CaCO 3형식피침정,81．54％피조류전화위유궤물,표현위정탄회효응.
During the karst carbon sink process,the dissolution of limestone brings CO2 which came from atmosphere and soil to water to form HCO-3 ,it stimulates the growth of aquatic algae.In order to study the stability of karst car-bon sink in the process of transforming inorganic carbon into organic carbon in aquatic algal photosynthesis.Nostoc which were screened in karst areas are used as the study object,probes into utilization of Ca2+ and HCO-3 in typical karst water by algal photosynthesis in closed system,and the relationship between algal cell biomass change and the utilization of Ca2+ and HCO-3 and as with the changes of pH and DO.The results showed that in the closed system 27.38% Ca2+ was absorbed by Nostoc cells through photosynthesis,and 29.54% Ca2+ was precipitated through phys-ical and chemical effects in the form of “Algae-CaCO3 ”complex and returned to the inorganic environment.In the process of algal photosynthesis,free CO2 was used first,then HCO-3 in karst water was used as carbon source in the closed system,and as with the using of HCO-3 ,the pH and DO correspondingly went up.At last in the closed system 65% HCO-3 in karst water was used by Nostoc through its photosynthesis,and 18.46% of which were precipitated together with Ca2+ in the form of extracellular CaCO3 ,81.54% are transformed into steady organic matter by algae through its photosynthesis and then cycle in ecological system which shows net carbon sink effect.
