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| 江苏近海主要生态因子分布特征及红色赤潮藻适生性研究 |
| Distribution Characteristics of Main Ecological Factors and Habitat Suitability of Akashiwo sanguinea in the Offshore Waters of Jiangsu |
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| DOI: |
| 中文关键词: 红色赤潮藻 叶绿素a 营养盐 适生区 最大熵模型 全球气候变化 江苏近海 |
| 英文关键词: Akashiwo sanguinea Chlorophyll a Nutrients Suitable habitat Maximum entropy model Global climate change Offshore waters of Jiangsu |
| 基金项目:国家重点研发计划基金资助项目(2022YFC3106002);国家自然科学基金面上资助项目(42476167);江苏省生态环境科研基金资助项目(2020009);江苏省生态环境监测科研基金资助项目(2329,24A04,24A14,24B04) |
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| 中文摘要: |
| 基于2023年4月、7月和10月航次调查数据,分析江苏沿岸海域表层海水主要生态因子的空间分布特征与季节变化规律,并采用最大熵(MaxEnt)模型研究红色赤潮藻在江苏近海的适生性。结果表明,江苏沿岸海域表层海水的溶解无机氮(DIN)以硝酸盐氮(NO-3 N)为主,其分布受河流输入影响显著,整体上呈现由近岸向外海逐渐递减的趋势;溶解无机磷(DIP)浓度季节变化不大,整体维持在较低浓度水平。红色赤潮藻在中国海及邻近海域的高适生区面积达200 210 km2,江苏近海海域不属于高适生区。2050—2100年红色赤潮藻高适生区将北移231 km~763 km,面积减少265%~634%,江苏近海无其高适生区可能与该海域水深较浅有关。 |
| 英文摘要: |
| Based on cruise survey data from April, July and October, 2023, the distributions and seasonal changes of the main ecological factors in surface seawater along the Jiangsu coast were analyzed. Maximum entropy(MaxEnt) model was used to study the habitat suitability of Akashiwo sanguinea(A. sanguinea) in the offshore waters of Jiangsu. The results indicated that NO-3 N was the main form of dissolved inorganic nitrogen(DIN) in Jiangsu coastal surface waters. Overall, it showed a gradually decreasing trend from inshore to offshore, and the distribution of NO-3 N was significantly 〖GK!87mm〗affected by river inputs. The seasonal variation in DIP concentration was small, remaining at a relatively low level. The highly suitable area for A. sanguinea in the China Seas and adjacent waters covered 200 210 km2, whereas the offshore waters of Jiangsu did not belong to the highly suitable areas. From 2050 to 2100, the highly suitable area of A. sanguinea would shift northward by 231 km to 763 km, with its area decreasing by 265% to 〖HK〗634%. The absence of highly suitable areas of A. sanguinea in the offshore waters of Jiangsu was associated with the relatively shallow water depth in this region. |
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