激光生物学报
激光生物學報
격광생물학보
ACTA LASER BIOLOGY SINICA
2014年
6期
523-533
,共11页
Bio-Argo 浮标%浮游植物生理学%光适应%叶绿素 a%光束衰减系数
Bio-Argo 浮標%浮遊植物生理學%光適應%葉綠素 a%光束衰減繫數
Bio-Argo 부표%부유식물생이학%광괄응%협록소 a%광속쇠감계수
Bio-Argo float%Phytoplankton physiology%Photoadaptation%Chlorophyll-a%Beam attenuation coefficient
本文通过4台 Bio-Argo 浮标在全球三个贫营养海区（南、北太平洋副热带海区、西北地中海）的观测数据，研究了叶绿素 a 浓度（[Chla]）和光束衰减系数（cp （660））的季节变化、两者的比值随光照的变化。研究表明，在南、北太平洋副热带海区，表层[Chla]与 cp 在季节上存在显著的非耦合性，[Chla]冬高夏低，cp 几乎不存在季节变化；在西北地中海，[Chla]与 cp 在季节上存在一定程度的共变特征。整体而言，[Chla]与 cp 的比值体现了浮游植物的光适应性，随生长光照的增高而降低。浮游植物的光适应性也存在明显的海区差异，通过两种回归模型，本文建立了三个海区的光适应方程，分析表明，造成这种海区差异的原因在于：除光照的限制外，浮游植物还受温度和营养盐的限制，回归系数 C 表征了温度与营养盐限制在季节上变化的程度，变化程度越小，C越接近于3。
本文通過4檯 Bio-Argo 浮標在全毬三箇貧營養海區（南、北太平洋副熱帶海區、西北地中海）的觀測數據，研究瞭葉綠素 a 濃度（[Chla]）和光束衰減繫數（cp （660））的季節變化、兩者的比值隨光照的變化。研究錶明，在南、北太平洋副熱帶海區，錶層[Chla]與 cp 在季節上存在顯著的非耦閤性，[Chla]鼕高夏低，cp 幾乎不存在季節變化；在西北地中海，[Chla]與 cp 在季節上存在一定程度的共變特徵。整體而言，[Chla]與 cp 的比值體現瞭浮遊植物的光適應性，隨生長光照的增高而降低。浮遊植物的光適應性也存在明顯的海區差異，通過兩種迴歸模型，本文建立瞭三箇海區的光適應方程，分析錶明，造成這種海區差異的原因在于：除光照的限製外，浮遊植物還受溫度和營養鹽的限製，迴歸繫數 C 錶徵瞭溫度與營養鹽限製在季節上變化的程度，變化程度越小，C越接近于3。
본문통과4태 Bio-Argo 부표재전구삼개빈영양해구（남、북태평양부열대해구、서북지중해）적관측수거，연구료협록소 a 농도（[Chla]）화광속쇠감계수（cp （660））적계절변화、량자적비치수광조적변화。연구표명，재남、북태평양부열대해구，표층[Chla]여 cp 재계절상존재현저적비우합성，[Chla]동고하저，cp 궤호불존재계절변화；재서북지중해，[Chla]여 cp 재계절상존재일정정도적공변특정。정체이언，[Chla]여 cp 적비치체현료부유식물적광괄응성，수생장광조적증고이강저。부유식물적광괄응성야존재명현적해구차이，통과량충회귀모형，본문건립료삼개해구적광괄응방정，분석표명，조성저충해구차이적원인재우：제광조적한제외，부유식물환수온도화영양염적한제，회귀계수 C 표정료온도여영양염한제재계절상변화적정도，변화정도월소，C월접근우3。
Based on the in situ dataset observed by 4 Bio-Argo floats deployed in three oligotrophic waters (South and North Pacific subtropical Gyre (SPG,NPG),North-Western Mediterranean sea (NWM)),this study focused on the seasonal variations of chlorophyll-a concentration ([Chla])and beam attenuation coefficient (cp (660)),as well as the response of their ratio with seasonally variable light intensity.The results showed that,both in SPG and NPG,there exis-ted remarkable decoupling between surface [Chla]and cp ,the former had a clear seasonal pattern (higher in winter and lower in summer),while the latter had no such variation.In NWM,[Chla]and cp co-varied seasonally to a certain ex-tent.Generally,the ratio of [Chla]and cp represented the characteristics of phytoplankton photoadaptation,decreased with growth irradiance increasing.The photoadaptation had the regional difference as well,this study,therefore,estab-lished different regressed equations in 3 regions based on two models,and proved that the light-dependent relationship are also regulated by variant nutrient and temperature limit conditions in different regions,and found that the regressed coefficient C represented the variability extent of nutrient and /or temperature limit.Less seasonal variation would lead to higher C (closer to 3).
