海洋科学
海洋科學
해양과학
MARINE SCIENCES
2014年
12期
8-15
,共8页
刘丽雪%王玉珏%邸宝平%刘东艳
劉麗雪%王玉玨%邸寶平%劉東豔
류려설%왕옥각%저보평%류동염
渤海%叶绿素a%环境因子%主成分分析
渤海%葉綠素a%環境因子%主成分分析
발해%협록소a%배경인자%주성분분석
Bohai Sea%chlorophyll a%environmental factors%Principal Components Analysis
分析了2012年春季渤海中部及其邻近海域32个站点叶绿素a和环境因子的空间分布特征及其相互关系。结果发现：渤海中部靠近黄河口邻近水域相对于其他水域，呈现出相对较高的水温和较低的盐度，这与黄河淡水输入以及近岸水深相对较浅有密切关系。营养盐浓度在空间分布上表现为黄河口附近海域较高，在垂直分布上表现为中、底层高于表层，显示出黄河水输入与沉积物营养盐再释放的影响；此外，营养盐浓度与结构显示，渤海海域存在明显的磷和硅限制，磷限制尤其严重。叶绿素 a浓度的空间分布显示，表层叶绿素 a 浓度的高值区出现在渤海湾湾口处，而中层与底层的叶绿素 a 浓度高值区出现在渤海中部。主成分分析结果表明，磷酸盐和温度是影响表层叶绿素a浓度的重要因素，而中、底层叶绿素a浓度主要受磷酸盐的影响。
分析瞭2012年春季渤海中部及其鄰近海域32箇站點葉綠素a和環境因子的空間分佈特徵及其相互關繫。結果髮現：渤海中部靠近黃河口鄰近水域相對于其他水域，呈現齣相對較高的水溫和較低的鹽度，這與黃河淡水輸入以及近岸水深相對較淺有密切關繫。營養鹽濃度在空間分佈上錶現為黃河口附近海域較高，在垂直分佈上錶現為中、底層高于錶層，顯示齣黃河水輸入與沉積物營養鹽再釋放的影響；此外，營養鹽濃度與結構顯示，渤海海域存在明顯的燐和硅限製，燐限製尤其嚴重。葉綠素 a濃度的空間分佈顯示，錶層葉綠素 a 濃度的高值區齣現在渤海灣灣口處，而中層與底層的葉綠素 a 濃度高值區齣現在渤海中部。主成分分析結果錶明，燐痠鹽和溫度是影響錶層葉綠素a濃度的重要因素，而中、底層葉綠素a濃度主要受燐痠鹽的影響。
분석료2012년춘계발해중부급기린근해역32개참점협록소a화배경인자적공간분포특정급기상호관계。결과발현：발해중부고근황하구린근수역상대우기타수역，정현출상대교고적수온화교저적염도，저여황하담수수입이급근안수심상대교천유밀절관계。영양염농도재공간분포상표현위황하구부근해역교고，재수직분포상표현위중、저층고우표층，현시출황하수수입여침적물영양염재석방적영향；차외，영양염농도여결구현시，발해해역존재명현적린화규한제，린한제우기엄중。협록소 a농도적공간분포현시，표층협록소 a 농도적고치구출현재발해만만구처，이중층여저층적협록소 a 농도고치구출현재발해중부。주성분분석결과표명，린산염화온도시영향표층협록소a농도적중요인소，이중、저층협록소a농도주요수린산염적영향。
Based on the data collected from the Bohai Sea in May 2012, the spatial distribution and correlations between chlorophyll a (Chl-a) and environmental factors were studied. Compared with the central Bohai Sea, higher temperature and lower salinity were examined in seawaters close to the sea area of the Yellow River mouth, indicating the impact of freshwater input and shallower water depth in coastal waters. Spatial distribution of nutri-ents showed relatively higher concentrations close to the Yellow River mouth as a result of the nutrient loadings of Yellow River. Vertical variations displayed that nutrient concentrations in the bottom and middle water layers were generally higher than those in surface water layer, indicating the impact of the sediment release. Phosphate and silicate were identified as limiting factors at most sites, based on the analysis of nutrient concentrations and struc-tures, and phosphate limitation was particularly serious. Concentrations of Chl-a in surface water were higher at the adjacent area of the Bohai Bay, but in middle and bottom water layers, the relatively higher concentrations of Chl-a occurred in the central of the Bohai Sea. The results of principal components analysis indicated that phosphate and temperature were major factors controlling the spatial distribution of Chl-a in the surface water layer, and phosphate was key factor in the middle and bottom water layers.
