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標題: | 溫度對亞熱帶淡水生態系群聚呼吸率的調控 Temperature effects on plankton community respiration in a subtropical freshwater ecosystem |
作者: | Chao-Chen Lai 賴昭成 |
指導教授: | 夏復國(Fuh-Kwo Shiah) |
關鍵字: | 群聚呼吸率,細菌呼吸率,溫度,亞熱帶,水庫,活化能, Community respiration,Bacterial respiration,Temperature,subtropical,reservoir,Activation energy, |
出版年 : | 2017 |
學位: | 博士 |
摘要: | 本研究為了瞭解浮游生物群聚呼吸率(CR)與細菌呼吸率(BR)的調控機制,在一磷限制的亞熱帶水庫進行為期十年的採樣,頻度為每周∼每兩周一次(水溫低於10℃)。我們發現在夏季的時候群聚呼吸率和細菌呼吸率皆擁有較高的值與較大的變動。研究結果顯示,溫度與群聚呼吸率,細菌呼吸率,標準化群聚呼吸率(SCR),標準化細菌呼吸率(SBR)皆有顯著正相關(p<0.05)。其和溫度的關係可用阿瑞尼斯方程式來表示:
R=R_o e^((-Ea)⁄kT) 這裡的Ea稱為活化能可以表示溫度與呼吸率的相關性,群聚呼吸率為0.80±0.04, 標準化群聚呼吸率為 0.34±0.06,細菌呼吸率為0.93±0.06,而標準化細菌呼吸率為0.39±0.06。這顯示了溫度也許是控制群聚呼吸率與細菌呼吸率主要因子。我們亦發現BR有較高的Ea 值,這暗示了在未來環境溫度改變的時候,細菌呼吸率會有較顯著的改變。 為了進一步探究溫度的影響,進行為期2年的溫度操控實驗。我們的結果顯示了,短期間的溫度改變下,群聚呼吸率活化能為0.69,細菌為1.07。而長期得觀測結果總和群聚呼吸率活化能為0.67,細菌為0.94。細菌對於環境溫度的敏感度要高於整個群聚。我們的結果也顯示了,溫度的改變會增加系統的不穩定。 With a ten-year weekly to biweekly data set taken from a P-limited subtropical reservoir, this study intends to explore the potential mechanisms in controlling the temporal variation of plankton community respiration rate (CR) and bacterial respiration rate (BR). Summer not only had high CR and BR value, but also high variation. The results showed that CR, BR, specific plankton community respiration (SCR), and specific bacterial respiration (SBR) all correlated with temperature significantly (p < 0.05). Activation energy, Ea, of CR is 0.80±0.04, SCR is 0.34±0.06, BR is 0.93±0.06, and SBR is 0.39±0.06. The results also indicated that temperature might be the major controlling factor for CR and BR. We also found that Ea-BR is high than Ea-CR, which indicate that BR was more sensitive to temperature than CR. Temperature manipulation experiment provide a situation to estimate temperature effect in wilder range. However, the most common characteristic of temperature response, activation energy (Ea), might be more variation. Our result combined two years temperature manipulation, the result proved that BR is more sensitive than CR either short-term temperature change (CR:0.69 and BR: 1.07) or long-term seasonal variation(CR: 0.67 ± 0.05 and BR:0.94 ± 0.08). Temperature change would increase system unstability. Two years result comparison showed that environmental condition would affect result warming. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/2577 |
DOI: | 10.6342/NTU201700651 |
全文授權: | 同意授權(全球公開) |
顯示於系所單位: | 海洋研究所 |
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