Publications about Rottnest Island

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Seagrass and sediment nutrients: Species comparison and fertilisation responses of P. australis at Rottnest Island, Western Australia (Page 1)

Seagrass and sediment nutrients: Species comparison and fertilisation responses of P. australis at Rottnest Island, Western Australia

Udy JW and Dennison WC ·
1999

Seagrasses, marine angiospenns with high rates of primacy productivity, are often hmned by the supply of nutrients or light. We investigated the ambient sedirncnt nutrient availability, biornass, growth and physiological characteristics of five seagrass species common around Rottnest lsland (P. australis, P. sinuosa, A. antarctica, A. griffithii and H. ovalis).

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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.

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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.

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