摘要
隐藻是近岸海域重要的浮游植物类群,但在传统显微镜检中往往被忽视。本文利用2021年4季浮游植物与环境因子数据,探究象山港隐藻的时空分布格局及其在浮游植物群落中的重要性。结果表明:象山港隐藻丰度存在显著的季节和空间差异。季节层面上,隐藻丰度(cells·mL^(-1))呈夏季(3944)>冬季(2533)>春季(271)>秋季(199)的趋势。空间层面上,隐藻丰度呈港底(2179)>港中(1799)>港口(897)。春、秋季隐藻的优势度(61.7%、43.5%)均超过硅藻(5.7%、32.1%),冬、夏季隐藻是相对丰度(21.9%、22.3%)仅次于硅藻(76.3%、74.5%)的优势类群。相似性百分比分析显示,隐藻对浮游植物群落的季节和空间差异贡献较大(均>11.2%),在象山港浮游植物群落中占据重要地位。广义相加模型显示,隐藻丰度的季节变化主要受温度影响,空间分布主要受盐度和活性磷酸盐的影响,而相对丰度的时空变化主要受温度影响。研究表明,低温、低盐、高活性磷酸盐环境可能更有利于隐藻在象山港生长。
Cryptophytes,as an important phytoplankton group,are usually neglected under traditional microscopical examination.We investigated the spatial and temporal variations of cryptophyte abundances in Xiangshan Bay(XSB)and their importance in the phytoplankton community using data from phytoplankton and environmental factors across four seasons in 2021.We found significant seasonal and spatial differences in cryptophyte abundances in XSB.On the seasonal scale,cryptophyte abundances(cells·mL^(-1))showed summer(3944)>winter(2533)>spring(271)>autumn(199).On the spatial scale,cryptophyte abundance showed the lower section(2179)>middle section(1799)>upper section(897).The relative abundances of cryptophytes(61.7%and 43.5%)were higher than those of diatoms(5.7%and 32.1%)in both spring and autumn,and the dominance of cryptophytes(21.9%and 22.3%)was second only to diatoms(76.3%and 74.5%)in winter and summer.Similarity percentage analyses showed that cryptophytes contributed largely(>11.2%)to the seasonal and spatial variations in the phytoplankton community in XSB,which occupied an important position in the phytoplankton community.The genera-lized additive models showed that the seasonal variation in cryptophyte abundances was mainly regulated by tempera-ture and that the spatial distribution was mainly influenced by salinity and dissolved reactive phosphorus.The spatial and temporal variation in cryptophyte relative abundances was mainly regulated by temperature.Our results indicated that the environment with low temperature,low salinity,and high dissolved reactive phosphorus might be more favourable for the growth of cryptophytes in XSB.
作者
王鹏
江志兵
朱元励
孙振皓
蒋雨露
林华
曾江宁
WANG Peng;JIANG Zhibing;ZHU Yuanli;SUN Zhenhao;JIANG Yulu;LIN Hua;ZENG Jiangning(Ocean College,Zhejiang University,Zhoushan 316021,Zhejiang,China;Key Laboratory of Marine Ecosystem Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;Key Laboratory of Nearshore Engineering Environment and Ecological Security of Zhejiang Province,Hangzhou 310012,China;State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China)
出处
《应用生态学报》
北大核心
2025年第5期1531-1539,共9页
Chinese Journal of Applied Ecology
基金
国家重点研发计划项目(2021YFC3101702)
浙江省科技计划项目(2024C03235)
国家自然科学基金项目(U24A20610)
卫星海洋环境动力学国家重点实验室自主课题(SOEDZZ2202)资助。
关键词
隐藻
浮游植物
象山港
广义相加模型
季节变化
空间分布
cryptophyte
phytoplankton
Xiangshan Bay
generalized additive models(GAM)
seasonal variation
spatial distribution
