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標題: | 五十二甲濕地環境差異對於圓蚌空間分布之影響 Evaluating How the Environmental Heterogeneity Affects the Distribution of the Freshwater Mussel Anodonta woodiana in Yilan 52-Jia Wetland |
作者: | Jia-Cong Chen 陳嘉聰 |
指導教授: | 張文亮(Wen-Lian Chang) |
關鍵字: | 五十二甲濕地,環境差異,圓蚌,耗氧率,潛行週期, 52-Jia Wetland,environmental heterogeneity,Anodonta woodiana,oxygen consumption rate (OCR),burrowing cycle., |
出版年 : | 2018 |
學位: | 碩士 |
摘要: | 為了解五十二甲濕地環境差異與圓蚌空間分布關係,本研究由其環境因子、代謝及行為三層面進行探討。於五十二甲濕地六條水路系統,進行物種、水質與底質調查。並由室內試驗,探討環境因子對於耗氧率(OCR) 及潛行週期(burrowing cycle) 影響。水質結果顯示,圓蚌不偏好棲息於高氮磷營養鹽和高電導度棲地。底質結果顯示,圓蚌偏好棲息於高黏粒底質質地,不偏好棲息於高鉀和鈉離子底質。室內試驗結果顯示,圓蚌在黏土與砂土底質環境,消耗的氧氣有極顯著差異,黏土的實驗組中,平均耗氧率為225.37 mgO2/kg-day、代謝常數為586.11;砂土的實驗組中,平均耗氧率為425.36 mgO2/kg-day、代謝常數為53.85。潛行週期結果顯示,黏土潛行週期平均相隔時間為50 ± 11秒、平均下潛距離為0.31 ± 0.07公分、最大角度為57°± 4°、平均擺動角度為12° ± 7°;砂土潛行週期平均相隔時間為143 ± 47秒、平均下潛距離為0.23 ± 0.08公分、最大角度為69° ± 5°、平均擺動角度為18° ± 3°。整體結果顯示,冬山河潮汐產生的高電導度棲地環境和周遭人為土地建築利用產生的氮磷營養鹽以及高砂粒底質,皆導致五十二甲濕地圓蚌空間分布的差異。並且,圓蚌喜好黏土底質環境,不喜好高電導度棲地環境。因此,建議在棲地維護及管理選擇上,減少潮汐進入與周遭土地建築利用。 To understand how environmental heterogeneity regulates the spatial distribution of Anodonta woodiana in wetlands, this study analyzed this subject from three aspect: the mussel’s environmental factor, metabolism, and behavior. The species, water quality and substrate quality in 52-Jia Wetland were analyzed to explore the environmental factors required for A. woodiana, and laboratory experiments were also conducted to investigate the influences of environmental factors on oxygen consumption rate (OCR) and burrowing cycle. The water quality factor shows that A. woodiana does not prefer high concentration of nitrogen, phosphorus nutrients and electrical conductivity habitats. The substrate quality factor shows that A. woodiana prefers to inhabit the high clay content substrate, and does not prefer high concentration of potassium and sodium. Therefore, the laboratory experiments are conducted based on the substrate quality factors to explore the OCR and burrowing cycle of A. woodiana. Results from the OCR experiments shows that there is a significant difference in the oxygen consumption between clay and sand substrate. In the clay experiments, the average OCR is 225.37 mgO2/kg-day, and metabolic constant is 586.11. In the sand experiments, the average OCR is 425.36 mgO2/kg-day, and the metabolic constant is 53.85. Results from the burrowing cycle experiments with clay substrate shows average time between burrowing cycle is 50 ± 11 sec, average burrowing distance is 0.31 ± 0.07 cm, biggest angle is 57° ± 4°, and average rocking angle is 12° ± 7°. The sand substrate experiment shows, average time between burrowing cycle is 143 ± 47 sec, average burrowing distance is 0.23 ± 0.08 cm, biggest angle is 69° ± 5°, and average rocking angle is 18° ± 3°. This study concludes that both the high electrical conductivity from Dongshan River and high sand substrate, high nitrogen and phosphorus nutrients concentration from building construction caused the difference of A.woodiana distribution in 52-Jia Wetland. Moreover, A.woodiana prefers substrate quality with higher content of clay and doesn’t prefer high electrical conductivity. Therefore, reduction of surrounding building and volume of tidal inlet are suggested on habitat maintenance and management. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/69534 |
DOI: | 10.6342/NTU201801192 |
全文授權: | 有償授權 |
顯示於系所單位: | 生物環境系統工程學系 |
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