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trophic adj.(司)營養的;口器的。

trophic behaviour

For a long time , astrocytes have been thought to provide mainly a structural , trophic , and metabolic support to neurons . with the development of research techniques , a growing body of evidence has emerged on the existence in the brain of a close bidirectional communication between neurons and astrocytes . astrocytes are not inertia cell and can regulated actively neuronal activity 傳統觀點認為,星形膠質細胞( ast )對神經元起支持、營養和保護功能,但隨著研究技術的不斷進步,越來越多的證據表明, ast并非惰性細胞,而是與周圍神經元之間存在雙向通訊,并能主動調控神經元的活動。

The application of nitrogen fertilizer affected positively and negatively the predation abilities both in laboratories and fields by its indirect and direct roles in the trophic relationship among host plants , herbivores and predators , the improvement of nutrients and the modification of allelochemicals in host plants 摘要施用氮肥后可以直接或間接地通過對植物害蟲天敵三者之間關系的干預、改變寄主植物內的營養成分和次生化學物質的含量等從正反兩個方面影響捕食性天敵的捕食能力。

The order euphausiacea consists of 86 or 87 species distributed over the ocean of the world , plays an important role in marine ecosystem , particularly in southern ocean , and is the key link of marine primarily productivity and higher trophic levels . krill fisheries are relatively recent developments . 47 species belonging to seven genera of two families in krill were recorded in china seas 磷蝦是一類大型的海洋浮游動物,數量大,分布廣,是海洋浮游動物的重要類群之一,在海洋生態系統中具有重要地位,尤其在南大洋,是維系海洋初級生產者與更高營養階的主要環節之一;同時,磷蝦又是許多經濟魚類的主要餌料,近年來,磷蝦作為新興的漁業資源正引起人們的高度重視。

Overall investigation of physiochemical features and biological factors of reservoir water quality were conducted in daoguanhe reservoir from 1999 to 2002 . at the basis of these investigations , integrate evaluation of trophic state and environmental status was made . theoretical base for the reasonable utilization of fishery resource and ecological management of environment were provided using bio - manipulation technique and ecoenergetics means 1999 ? ? 2002年全面調查了武漢道觀河水庫的水質理化特性和生物因子,在此基礎上綜合評價了水庫的營養狀態和環境現狀,并利用生物操縱技術和能量生態學手段,為水庫漁業資源的合理利用和漁業環境的生態學管理提供理論基礎。

According to the modified carlson ' s trophic state index , the lake has recently been varied between oligotrophic and mesotrophic . cyanophyta , bacillariophyta and crytophyta were the superiority population in qiandao lake , but cyanophyta was the superiority population in algae bloomed month such as march , june and july 藍藻門、硅藻門、隱藻門為千島湖的優勢種群,但在藻類爆發的5月、 6月和7月,均是藍藻門為優勢種群,優勢種群與1992年比較發生了i刪。

They found that a protein called brain - derived neurotrophic factor ( bdnf ) , which is well known to be a trophic factor for the survival of neurons , is crucial in the formation of long - term memory . their results will be published today ( 15 october ) in the prestigious journal science 他們發現一種名為腦源性神經營養因素( brain - derivedneurotrophicfactor , bdnf )的蛋白質,一直被認定為神經元必需的營養因素,原來也是長期記憶形成過程中的一種關鍵蛋白。

The results showed that the trophic lenel of lake taihu was in the transition state , from meso - eutrophic to eutrophic , of which the meso - eutrophic made up about 70 % of the total are . the eutrophic and hyper - eutrophic waters accounted for 10 % or so 結果表明,太湖營養水平處于中富向富營養過渡狀態,中富面積約占全湖面積的70 %以上;夏季富營養及重富營養水域出現在北部湖區的梅梁湖、五里湖和西部沿岸,約占全湖面積的10 % 。

Pyramid of biomass a type of ecological pyramid based on the total amount of living material at each trophic level in the community , which is normally measured by total dry weight or calorific value per unit area or volume , and shown diagrammatically 生物量金字塔:指基于群落每個營養水平上有生命的物質總量的一種生態金字塔類型,通常通過總干重或者每單位面積或體積的生熱量值來衡量,并用圖表表示出來。

We propose to integrate the life strategy approach and trophic group classification to obtain a better understanding of nematode diversity and their functions , so as to use nematodes as effective bioindicators in farmland ecosystems 建議通過綜合土壤線蟲的生活史策略和營養類群等信息,深入了解其生物多樣性和土壤生態系統功能,從而更好地發揮土壤線蟲對農田生態系統變化的生物指示作用。

Abstract based on nine - time investigation of current eutrophication status of lake taihu during 1994 - 1995 , this paper evaluated the trophic levels in the different periods and analyzed the development of the main nurtient content in the nearest 35 years 摘要在1994 - 1995年太湖9次富營養化現狀調查基礎上,評價了太湖各期營養程度,并分析了35年來主要營養物含量發展趨勢。

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。

Through analysis of the development and present state of water eutrophication in yanghe reservoir , the water eutrophication was evaluated comprehensively by using trophic status indices 摘要在分析洋河水庫富營養化發展及現狀的基礎上,采用營養狀態指數法對其營養狀況進行綜合評價。

A 3d coupled physical and biological model was used to examine the marine ecosystem of the bohai sea . the biological model described a simple , nitrate and phosphate based , lower trophic food web system 過糾成邢分,風場足鄭的咨個渤海行和十流; raj的下蟄m素,發皿風場隨時” 。

Birds are positioned at high trophic level within the food web in the ecosystem , and thus any changes within the system can affect the birds in one way or another 鳥類在生態系統中處于較高的營養級,生態系統中住何一個環節的變化都可能對鳥類造成一定的影響。

Methane is an important greenhouse gas in the atmosphere , and the only known biological ch4 sink is the soil where methane trophic bacterium consume ch4 by oxidization Ch _ 4是大氣中重要的溫室氣體之一,透氣土壤是目前唯一已知的ch _ 4生物匯。

Here to provide some hints : 1 . cactus put into a chair two . use scissors to make the newspapers implantation could only exert trophic 3 這里提供一些提示: 1 .把仙人掌放到椅子上2 .用剪刀把報紙剪碎3 .把小孩的玩具車弄走4 .按下咖啡機的開關

Since early seventies , he started to investigate the trophic relationship between nerve and muscle and the neural determination of muscle fibre types 從70年代初開始,研究的主要問題是神經肌肉間營養關系和肌纖維類型的神經控制。

Before 80 , he worked on the trophic relationship between nerve and muscle , especially the neural determination of muscle fiber type characteristics 年代前,他主要研究神經和肌肉間的營養性關系,特別是肌纖維類型特征的神經控制。

Glias are traditionally thought to assume a structural , trophic , and protective role to neurons 傳統觀點認為膠質細胞是一種支持細胞,起支持、營養和保護神經元的作用。