Photophysiology of the first reported bleached crustose coralline alga, Clathromorphum sp. (Hapalidiales, Rhodophyta), from Antarctica

被引：0

作者：

Calderon, Martha S. ^{[1
,2
,3
]}

Bustamante, Danilo E. ^{[2
,3
]}

Mansilla, Andres ^{[1
,4
]}

Mendez, Fabio ^{[1
]}

Rodriguez, Juan P. ^{[1
,4
]}

Marambio, Johanna ^{[1
,4
,5
]}

Convey, Peter ^{[4
,6
,7
,8
]}

机构：

[1] Univ Magallanes, Lab Ecosistemas Marinos Antart & Subantart LEMAS, Punta Arenas, Chile

[2] Univ Nacl Toribio Rodriguez de Mendoza, Fac Ingn Civil & Ambiental FICIAM, Inst Invest Ingn Ambiental INAM, Chachapoyas, Peru

[3] Univ Nacl Toribio Rodriguez de Mendoza, Inst Invest Desarrollo Sustentable Ceja Selva INDE, Chachapoyas, Peru

[4] Cape Horn Int Ctr CHIC, Puerto Williams, Chile

[5] Univ Bremen, Fac Biol & Chem, Marine Bot, Bremen, Germany

[6] NERC, British Antarctic Survey, Cambridge, England

[7] Univ Johannesburg, Dept Zool, Auckland Pk, South Africa

[8] Univ Austral Chile, Biodivers Antarctic & Subantarct Ecosyst, Valdivia, Chile

来源：

ANTARCTIC SCIENCE | 2025年 / 37卷 / 01期

基金：

英国自然环境研究理事会;

关键词：

Antarctic Peninsula; irradiance; photosynthetic performance; psbA; rbcL; salinity; PHOTOSYNTHETIC CHARACTERISTICS; CLIMATE-CHANGE; RED ALGAE; TEMPERATURE; SALINITY; PRODUCTIVITY; MACROALGAE; DISEASE; SEA;

D O I：

10.1017/S0954102024000361

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

During a 2019 Chilean Antarctic Scientific Expedition (ECA 55) studying crustose coralline algae (CCA) diversity on the Antarctic Peninsula, bleaching of these algae was observed for the first time in this region. Here, we present initial findings on the physiological state of bleached and normally pigmented CCA (Clathromorphum sp.) assessed using chlorophyll-a fluorescence induction pulse amplitude modulation. The study site experienced high light exposure and salinity in the water column. Our analyses found that bleached CCA have relatively healthy photophysiology responses but lower photosynthetic efficiency, which could be associated with the low salinities recorded in the study area. However, seasonal monitoring and mesocosm experiments across the southern polar latitudes are urgently required to confirm this hypothesis.

引用

页码：5 / 12

页数：8

共 59 条

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