The in situ light microenvironment of corals

被引：52

作者：

Wangpraseurt, Daniel ^{[1
]}

Polerecky, Lubos ^{[2
,3
]}

Larkum, Anthony W. D. ^{[1
]}

Ralph, Peter J. ^{[1
]}

Nielsen, Daniel A. ^{[1
]}

Pernice, Mathieu ^{[1
,4
]}

Kuhl, Michael ^{[1
,5
,6
]}

机构：

[1] Univ Technol Sydney, Sydney, NSW 2007, Australia

[2] Max Planck Inst Marine Mikrobiol, D-28359 Bremen, Germany

[3] Univ Utrecht, Dept Earth Sci, Utrecht, Netherlands

[4] Ecole Polytech Fed Lausanne, Lab Biol Geochem, CH-1015 Lausanne, Switzerland

[5] Univ Copenhagen, Dept Biol, Marine Biol Sect, Helsingor, Denmark

[6] Nanyang Technol Univ, Sch Biol Sci, Singapore Ctr Environm Life Sci, Singapore 639798, Singapore

来源：

LIMNOLOGY AND OCEANOGRAPHY | 2014年 / 59卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

MORPHOLOGICAL PLASTICITY; STYLOPHORA-PISTILLATA; ALGAL SYMBIONTS; SOLAR-RADIATION; REEF CORAL; PHOTOSYNTHESIS; MICROSENSOR; IRRADIANCE; DIVERSITY; TISSUES;

D O I：

10.4319/lo.2014.59.3.0917

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We used a novel diver-operated microsensor system to collect in situ spectrally resolved light fields on corals with a micrometer spatial resolution. The light microenvironment differed between polyp and coenosarc tissues with scalar irradiance (400-700 nm) over polyp tissue, attenuating between 5.1- and 7.8-fold from top to base of small hemispherical coral colonies, whereas attenuation was at most 1.5-fold for coenosarc tissue. Fluctuations in ambient solar irradiance induced changes in light and oxygen microenvironments, which were more pronounced and faster in coenosarc compared with polyp tissue. Backscattered light from the surrounding benthos contributed. 20% of total scalar irradiance at the coral tissue surface and enhanced symbiont photosynthesis and the local O-2 concentration, indicating an important role of benthos optics for coral ecophysiology. Light fields on corals are species and tissue specific and exhibit pronounced variation on scales from micrometers to decimeters. Consequently, the distribution, genetic diversity, and physiology of coral symbionts must be coupled with the measurements of their actual light microenvironment to achieve a more comprehensive understanding of coral ecophysiology.

引用

页码：917 / 926

页数：10

共 45 条

[1]

[Anonymous], 2010, Light and Photosynthesis in Aquatic Ecosystems

[2] Adaptive variation in coral geometry and the optimization of internal colony light climates [J].