IAN is committed to producing practical, user-centered communications that foster a better understanding of science and enable readers to pursue new opportunities in research, education, and environmental problem-solving. Our publications synthesize scientific findings using effective science communication techniques.

Within canopy growth strategies of the two seagrass species Amphibolis griffithii (J. Black) den Hartog and Amphibolis antarctica (Labillardiere) Sonder & Ascherson ex Ascherson (Page 1)

Within canopy growth strategies of the two seagrass species Amphibolis griffithii (J. Black) den Hartog and Amphibolis antarctica (Labillardiere) Sonder & Ascherson ex Ascherson

Carruthers TJB ·
1999

Responses in leaf production to variation in light climate throughout Amphibolis griffithii and A.antarctica canopies were studied at Rottnest Island, Western Australia. To test the importance of small scale changes in the physical environment (e.g. light, temperature and water movement) within the canopy, leaf production rates at different heights within the canopies and Radiation Use Efficiency (RUE), for the entire canopy of each species, were calculated and compared.

Read more

In situ seagrass photosynthesis measured using a submersible, pulse-amplitude modulated fluorometer (Page 1)

In situ seagrass photosynthesis measured using a submersible, pulse-amplitude modulated fluorometer

Ralph PJ, Gademann R, and Dennison WC ·
1998

Assessments of photosynthetic activity in marine plants can now be made in situ using a newly developed, submersible, pulse-amplitude modulated (PAM) fluorometer: Diving-PAM. PAM fluorometry provides a measure of chlorophyll a fluorescence using rapid-light curves in which the electron-transport rate can be determined for plants exposed to ambient light conditions. This technique was used to compare the photosynthetic responses of seagrasses near Rottnest Island, Western Australia.

Read more

Photosynthetic capacity in coral reef systems: Investigations into ecological applications for the underwater PAM fluorometer (Page 1)

Photosynthetic capacity in coral reef systems: Investigations into ecological applications for the underwater PAM fluorometer

Jones AB and Dennison WC ·
1998

A submersible pulse amplitude modulated (PAM) fluorometer was used to determine the effects of desiccation, ultraviolet radiation, changes in solar radiation and nutrient availability on the photosynthetic apparatus of a variety of marine plants (zooxanthellae, benthic microalgae and macroalgae) at Heron Island, Great Barrier Reef, Australia. The PAM measures photosynthesis as irradiance-dependent photosystem II electron transport.

Read more