頁籤選單縮合
題名 | 臺南縣急水溪海茄苳林分枯落物量及養分之動態變化=Litterfall and Nutrient Dynamics of a Mangrove Avicennia Marina (Forsk.) Vierh. Forest at the Chishui River, Tainan County, Taiwan |
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作 者 | 范貴珠; | 書刊名 | 臺灣林業科學 |
卷期 | 22:4 2007.12[民96.12] |
頁次 | 頁441-454 |
分類號 | 436.12 |
關鍵詞 | 紅樹林; 海茄苳; 枯落物; 養分動態; 年回歸量; Mangrove; Avicennia marina; Litterfall; Nutrient dynamics; Annual nutrient flux amount; |
語文 | 中文(Chinese) |
中文摘要 | 本研究目的在探討台南縣急水溪河口海茄苳 (Avicennia marina) 林分枯落物量及其養分之動態變化,自2002 年10 月至 2004 年 9 月止,在 6 條樣線中 (北岸 4 條,南岸2條)每月收集一次枯落物,共計收集 24 個月。2 年之年枯落物總量分別為 11.78 及 12.55 Mg ha-1 yr-1 ,其中葉部比例分別佔 68.3 及 61.8%,而枝條為 13.0 及 13.6%,繁殖體佔 14.1 及 14.6%,其他成分則為 4.7 及 10.1%。各月份之枯落物量有明顯變化,大致以 8~11 月之枯落物量較高。根據枯落物量與環境因子進行相關分析結果顯示,葉部枯落物量與風速、雨量、氣溫、水溫無相關性,與水中氯離子濃度及電導度呈負相關。枝條、繁殖體及總枯落物量與風速、雨量、氣溫、水溫呈正相關,亦與水中氯離子濃度及電導度呈負相關。2002 年10 月至 2003 年 9 月各組成分養分濃度依序為 C > Na > N > Ca > K > Mg > P ,而8~12 月時之養分濃度較高。枯落物之C、N、P、K、Na 、Ca 及 Mg 元素年回歸量,分別為5353.04、169.01、15.40、65.17、347.36、89.62 及 63.91 kg-1 ha-1,呈現葉部>繁殖體>枝條>其他部位趨勢,顯示葉部枯落物為此紅樹林生態系養分回歸之主要來源。 |
英文摘要 | Litterfall and nutrient dynamics were studied at a monospecific mangrove stand Avicennia marina located at the mouth of the Chishui River in Tainan County, southwestern Taiwan. Litterfall was collected once a month for 24 mo (from October 2002 to September 2004), along 6 transects (4 on the north bank and 2 on the south bank). Over the 2-yr period, annual litterfall production levels were 11.78 and 12.55 Mg ha-1 yr-1, leaf litter accounted for 68.3 and 61.8% of total litterfall, 13.0 and 13.6% were branch litter, 14.1 and 14.6% were reproductive organ litter, and 4.7 and 10.1% were miscellaneous parts, respectively. Litterfall varied in different months, and higher litterfall occurred in August to November. According to a correlation analysis between litterfall and environmental factors, leaf litter was independent of wind speed, rainfall, air temperature, and water temperature, however it was negatively correlated with chloride concentration and water conductivity. Branch, reproductive organ, and total litterfall production levels were positively correlated with wind speed, rainfall, air temperature, and water temperature, however they had negative correlations with chloride concentration and water conductivity. During October 2002 to September 2003, nutrient concentrations of the littefall were in order of C > Na > N > Ca > K > Mg > P, and the seasonal concentrations of nutrients were high during August to December. In addition, the annual nutrient flux amounts of C, N, P, K, Na, Ca, and Mg were 5353.04, 169.01, 15.40, 65.17, 347.36, 89.62, and 63.91 kg-1 ha-1 from litterfall, respectively, in the order of leaves > reproductive organs > branches > miscellaneous parts. The results indicated that leaf litterfall was the major nutrient source in this mangrove ecosystem. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。