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.

Temperature, salinity and food effects on asexual reproduction and abundance of the scyphozoan Chrysaora quinquecirrha

Purcell JE, White JR, Nemazie DA, and Wright DA ·
1999

Outbreaks of jellyfish are reported worldwide, yet the environmental factors that control the sizes of jellyfish populations are not well understood. The scyphomedusan Chrysaora quinquecirrha occurs in the mesohaline portion of Chesapeake Bay each summer. Population sizes of the medusae show dramatic annual variations that are correlated with salinity and temperature.

Read more

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