• 沒有找到結果。

本研究以現今牡蠣殼體碳氧同位素數值與其生活周遭海域的水樣資 料,了解牡蠣殼體沉澱時是否與週遭水體達成穩定同位素平衡,再利用南 關里及南關里東遺址的牡蠣討論距今4 千年前與現今的環境差異。將所得 的結果做出下列總結:

1. 牡蠣的殼身、韌帶部位硬質殼體、韌帶部位白堊層的氧同位素皆呈同向 變化,且分布範圍差異不大,表示三者皆可用來探討環境變化,但因韌 帶部位硬質殼體的型態最穩定,因此本研究選擇韌帶部位硬質殼體為分 析部位。

2. 由現生牡蠣韌帶部位硬質殼體氧同位素的分布曲線,可知氧同位素在不 同月份呈現出輕重不同的變化,符合環境變化的趨勢,從2008 年 6 月 至2009 年 5 月的牡蠣氧同位素記錄,可看到完整一年的變化。

3. 將不同月份的海水氧同位素與不同月份生長的殼體氧同位素,可發現換 算出的最低溫為19.7°C,實際海溫卻可低至 15°C,因此推論牡蠣適合 生長的環境溫度應高於19°C,且牡蠣會出現停止生長或生長緩慢的現 象。

4. 南關里第一文化層牡蠣較現生牡蠣氧同位素值重 0.82‰,南關里第二文 化層牡蠣較現生牡蠣氧同位素值重1.05‰,南關里東牡蠣較現生牡蠣氧 同位素值重1.03‰,以及以現今海水氧同位素代入求得遺址殼體的溫 度,冬夏季分別為18.1、28.1°C,與現今東石測站冬夏季平均溫度為 19.4、29.2°C 相比,皆顯示距今 4100~4700 年前溫度較現今低,4 千多 年前呈現較冷的現象。

5. 南關里遺址過去人類採集牡蠣大多選在冬天,南關里東遺址過去人類採 集牡蠣時間應也多在春初的時候。

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附錄一、金湖地區現生牡蠣養殖區水樣分析數值

附錄一、金湖地區現生牡蠣養殖區水樣分析數值(續)

附錄一、金湖地區現生牡蠣養殖區水樣分析數值(續)

附錄一、金湖地區現生牡蠣養殖區水樣分析數值(續)

日期 時間 溫度

°C

鹽度

δ18OVSMOW

日期 時間 溫度

°C 鹽度

δ18OVSMOW

2009/5/20 7:05 27.8 31.8 -0.41 2009/6/1 5:19 25.8 30.5 -0.53 2009/5/21 7:52 29.1 31.5 -0.46 2009/6/2 6:14 27.3 30.1 -0.30 2009/5/22 8:36 29.5 32.4 -0.31 2009/5/29 9:50 24.8 24.5 -0.16 2009/5/23 9:19 29.8 32.2 -0.27 2009/5/29 12:20 26.4 28.2 -0.31 2009/5/24 10:01 28.9 32.6 -0.32 2009/5/29 12:10 26.6 27.4 -0.28 2009/5/25 10:43 29.3 32.4 -0.31 2009/5/29 11:55 26.3 27.1 -0.27 2009/5/26 11:26 29.9 32.7 -0.29 2009/5/29 11:37 26.2 27.1 -0.25 2009/5/27 12:13 27.1 32.9 -0.25 2009/5/29 11:10 25.5 28.2 -0.21 2009/5/28 13:04 26.8 32.3 -0.27 2009/5/29 10:50 26.1 28.4 -0.71 2009/5/29 14:01 28.2 30.1 -0.23 2009/5/29 10:15 26.2 31.5 -0.52 2009/5/30 15:05 29.3 31.1 -0.34 2009/5/29 15:30 31.8 32.5 -0.62 2009/5/31 16:14 29.5 30.3 -0.30

附錄二、金湖地區現生牡蠣殼體碳氧同位素分析數值

Sample δ13CVPDB‰ δ18OVPDB Sample δ13CVPDB‰ δ18OVPDB JH080614_01_01 -1.35 -2.74 JH081109_03_09 -2.84 -5.10 JH080614_01_02 -1.74 -2.70 JH081109_03_10 -2.99 -5.24 JH080614_01_03 -1.79 -3.41 JH081109_03_11 -3.19 -5.35 JH080614_01_04 -2.02 -3.45 JH081109_04_01 -1.04 -1.08 JH080614_01_05 -2.31 -4.34 JH081109_04_02 -1.35 -2.18 JH080614_01_06 -2.72 -4.93 JH081109_04_03 -1.31 -2.81 JH080614_05_02 -1.18 -2.42 JH081109_04_04 -1.66 -2.69 JH080614_05_03 -2.17 -3.07 JH081109_04_05 -1.69 -3.06 JH080614_05_05 -2.49 -3.57 JH081109_04_06 -2.74 -4.67 JH080614_05_06 -2.60 -3.33 JH081109_04_07 -3.77 -5.75 JH080614_05_07 -2.83 -4.01 JH081109_04_08 -3.25 -4.97 JH080614_05_08 -3.52 -4.33 JH081109_05_01 -1.29 -2.90 JH080614_05_09 -3.57 -4.81 JH081109_05_02 -1.75 -3.14 JH080614_06_01 -1.49 -2.97 JH081109_05_03 -1.61 -3.32 JH080614_06_02 -1.51 -2.88 JH081109_05_04 -2.42 -4.45 JH080614_06_03 -1.53 -3.07 JH081109_05_05 -2.94 -5.23 JH080614_06_04 -1.91 -3.46 JH081109_05_06 -2.74 -4.66 JH080614_06_05 -2.17 -4.15 JH081109_05_07 -3.39 -5.52 JH080614_06_06 -2.87 -4.70 JH081109_05_08 -3.03 -5.36 JH080614_06_07 -2.99 -4.99 JH081109_05_09 -3.05 -5.07 JH081109_01_01 -0.31 -0.92 JH081109_05_10 -2.84 -4.53 JH081109_01_02 -1.11 -2.31 JH081109_05_11 -3.18 -4.76 JH081109_01_03 -1.66 -2.51 JH081109_05_12 -3.37 -4.46 JH081109_01_04 -1.91 -3.05 JH081109_05_13 -3.07 -3.73 JH081109_01_05 -1.78 -2.96 JH081220_01_02 -1.34 -2.91 JH081109_01_06 -2.08 -4.13 JH081220_01_03 -2.54 -4.65 JH081109_01_07 -2.46 -4.93 JH081220_01_04 -2.65 -4.74 JH081109_01_08 -2.92 -5.24 JH081220_01_05 -3.24 -5.24 JH081109_01_09 -2.50 -5.22 JH081220_01_06 -3.15 -5.03 JH081109_03_01 -1.75 -1.57 JH081220_01_07 -3.39 -5.30 JH081109_03_02 -1.27 -2.23 JH081220_01_08 -3.57 -5.75 JH081109_03_03 -1.29 -2.88 JH081220_01_09 -3.28 -5.42 JH081109_03_04 -1.71 -2.62 JH081220_01_10 -2.77 -4.78

附錄二、金湖地區現生牡蠣殼體碳氧同位素分析數值(續)

附錄二、金湖地區現生牡蠣殼體碳氧同位素分析數值(續)

附錄二、金湖地區現生牡蠣殼體碳氧同位素分析數值(續)

Sample δ13CVPDB‰ δ18OVPDB Sample δ13CVPDB‰ δ18OVPDB JH02_chalky26 -1.14 -2.48 JH02_chalky37 -1.49 -1.26 JH02_chalky27 -1.48 -3.40 JH02_chalky38 -1.54 -1.32 JH02_chalky28 -0.90 -2.31 JH02_chalky40 -0.63 -1.87 JH02_chalky29 -0.97 -2.24 JH02_chalky41 -0.58 -1.75 JH02_chalky30 -1.14 -2.24 JH02_chalky42 -0.52 -1.73 JH02_chalky31 -1.32 -2.44 JH02_chalky43 -0.55 -1.68 JH02_chalky32 -1.32 -2.58 JH02_chalky44 -0.62 -1.33 JH02_chalky33 -1.37 -2.65 JH02_chalky45 -0.71 -1.42 JH02_chalky34 -1.24 -1.66 JH02_chalky46 -0.70 -1.52 JH02_chalky36 -1.27 -0.93 JH02_chalky47 -0.61 -1.80

附錄三、南關里與南關里東遺址牡蠣殼體碳氧同位素數值

附錄三、南關里與南關里東遺址牡蠣殼體碳氧同位素數值

附錄三、南關里與南關里東遺址牡蠣殼體碳氧同位素數值

附錄三、南關里與南關里東遺址牡蠣殼體碳氧同位素數值 (續)

Sample δ13CVPDB‰ δ18OVPDB Sample δ13CVPDB‰ δ18OVPDB NKLE5016_02_05 -3.30 -4.74 NKLE5016_03_07 -3.89 -4.01 NKLE5016_02_06 -2.85 -3.23 NKLE5016_03_08 -2.93 -4.56 NKLE5016_02_07 -1.80 -2.28 NKLE5016_02_10 -0.61 -0.92 NKLE5016_02_08 -2.00 -2.02 NKLE5016_03_10 -2.28 -2.64 NKLE5016_01_02 -3.63 -4.37 NKLE5016_03_12 -1.86 -2.29 NKLE5016_02_09 -1.65 -1.22 NKLE5016_03_13 -1.32 -1.28 NKLE5016_02_10 -0.61 -0.92 NKLE5016_03_14 -0.79 -0.76 NKLE5016_02_11 -2.74 -2.91 NKLE5016_03_15 -0.60 -0.92 NKLE5016_02_12 -3.65 -3.74 NKLE5016_03_16 -0.56 -0.41 NKLE5016_02_13 -3.49 -4.62 NKLE5016_03_17 -0.67 -1.14 NKLE5016_02_14 -2.42 -2.23 NKLE5016_03_18 -3.40 -3.69 NKLE5016_02_15 -1.90 -1.22 NKLE5016_03_19 -3.16 -3.80 NKLE5016_02_16 -1.77 -0.83 NKLE5016_03_20 -1.53 -1.01 NKLE5016_02_17 -0.98 -0.37 NKLE5016_03_21 -0.67 -1.00 NKLE5016_02_18 -0.80 -0.55 NKLE5016_03_22 -0.91 -1.08 NKLE5016_02_19 -0.97 -0.87 NKLE5016_03_23 -2.64 -2.95 NKLE5016_03_01 -1.41 -3.25 NKLE5016_03_24 -4.21 -5.36 NKLE5016_03_02 -2.14 -4.33 NKLE5016_03_25 -1.37 -0.89 NKLE5016_03_03 -2.09 -5.89 NKLE5016_03_26 -1.40 -1.92 NKLE5016_03_04 -3.22 -5.18 NKLE5016_03_27 -2.33 -2.63 NKLE5016_03_05 -3.63 -3.99 NKLE5016_03_10 -2.28 -2.64 NKLE5016_03_06 -3.72 -4.05

附錄四、金湖地區現生牡蠣養殖區水樣氧同位素平均

δ18OVSMOW

δ18OVSMOW

7 月 -3.07 12.1 月 -0.66

7.8 月 -2.58 1 月 -0.53

8 月 -2.26 1.2 月 -0.42

8.9 月 -2.07 2 月 -0.31

9 月 -1.88 2.3 月 -0.37

9.10 月 -1.86 3 月 -0.42

10 月 -1.83 3.4 月 -0.45

10.11 月 -1.57 4 月 -0.47

11 月 -1.31 4.5 月 -0.40

11.12 月 -1.05 5 月 -0.33

12 月 -0.78

附錄五、現生牡蠣對應日期與計算溫度

附錄五、現生牡蠣對應日期與計算溫度(續)

附錄五、現生牡蠣對應日期與計算溫度(續)

Sample δ18OVPDB 對應日期 δ18OVSMOW‰ 計算溫度°C

Sample δ18OVPDB 對應日期 δ18OVSMOW‰ 計算溫度°C