x
uploads/biogeochemical cycle.jpg

biogeochemical cycle 生物地質化學循環,生物地理化學循環。

The article is based on nation nature science foundation of china , “ biogeochemical cycling of pollutants in complex environments of tidal flats in the yangtze estuary “ ( no . 40131020 ) . the author chose open tidal flat of dong tang chongming yangtze estuary as research object and set up typical section plane so that under the good condition , the author measured hydrology element , total nitrogen and total phosphor index 本文依托國家自然科學基金重點項目“長江口濱岸潮灘復雜環境條件下物質循環研究” (批準號: 40131020 ) ,選擇了長江口崇明東灘敞開型潮灘為研究對象,設置典型斷面,在平靜天氣條件下,實測了水文、地球化學要素,獲得了水位、流向、流速、 tn及tp等指標6000多個實測數據,著重對長江口潮灘水動力過程、 tn和tp的動力輸移過程進行研究。

biogeography

In order to understand the effects of drainage ditches on the biogeochemical cycling in wetland , this paper takes the sanjiang plain as an example , and makes a detail introduction to the impacts of drainage ditches on the characteristics of movement , transformation , inputs and outputs of chemical elements and on the chemical mass balance 以三江平原濕地為例,從溝渠對濕地化學元素遷移轉化、濕地化學元素輸入輸出和濕地化學質量平衡影響方面分析了溝渠對濕地生物地球化學循環的影響。

The article is based on nation nature science foundation of china , “ biogeochemical cycling of pollutants in complex environments of tidal flats in the yangtze estuary “ ( no . 40131020 ) . the author chose open tidal flat of dong tang chongming yangtze estuary as research object and set up typical section plane so that under the good condition , the author measured hydrology element , total nitrogen and total phosphor index 本文依托國家自然科學基金重點項目“長江口濱岸潮灘復雜環境條件下物質循環研究” (批準號: 40131020 ) ,選擇了長江口崇明東灘敞開型潮灘為研究對象,設置典型斷面,在平靜天氣條件下,實測了水文、地球化學要素,獲得了水位、流向、流速、 tn及tp等指標6000多個實測數據,著重對長江口潮灘水動力過程、 tn和tp的動力輸移過程進行研究。

The understanding of biogeochemical cycle of hydrogen , oxygen , carbon , nitrogen , and sulfur elements in nature ecosystem have increased substantially in the past two decades owing to the improvement of gas isotope ratio mass spectrometer and the wide application of isotopic studies with these elements 摘要近20年由于氣相同位素比值質譜儀的改良和氫、氧、碳、氮和硫等穩定同位素的廣泛研究,穩定同位素的研究技術已實質增加我們對于這些元素在自然生態系中生地化循環的了解。

The third part studies in detail on landscape ecological structures and functions of small watersheds in the region , including spatial physical structure and its differentiation ; biological structure and balance among its components . as a compound ecological system , function and its evolvement of small watersheds has also been touched . several landscape processes relating to functions , including biogeophisical processes , biogeochemical cycle and biogeosocial cycle have also been analyzed 第三部分詳細研究了k域小流域景觀生態學特點,包括景觀空間物理結構及其分異;景觀生物結構及其平衡;同時探討了作為一個復合生態系統,小流域景觀功能及其發展變化特點;認真分析了與功能有關的景觀過程:牛物地球物理過程,生物地球化學循環以及生物地球社會循環。

The course covers productivity and biogeochemical cycles in ecosystems , trophic dynamics , community structure and stability , competition and predation , evolution and natural selection , population growth and physiological ecology 課程包含生態系之生產力與生物地質化學循環、營養動力學、群落結構與穩定性、競爭與捕食、演化與天擇、族群成長,及生理生態學。

To study the biogeochemical cycle of phosphorus , it is very important to accurately determine the concentration of orthophosphates in the surface of oceans , especially oligotrophic open - oceans 痕量活性磷分析是探索海洋,特別是寡營養海區生物地球化學過程的關鍵。

Wetlands have unique biogeochemical cycles with many chemical transformations and chemical transport processes that are not shared by many other ecosystems 摘要濕地有其獨特的生物地球化學循環,其間許多化學遷移和轉化過程不為其它生態系統所共享。

Chemical and stable carbon isotopic compositions of the ground waters of guiyang city , china : implications for biogeochemical cycle of carbon and contamination 碳同位素和水化學在示蹤貴陽地下水碳的生物地球化學循環及污染中的應用