14 research outputs found
Effect of El Niño on Demographic, Morphological, and Chemical Parameters in Turtle-Grass (Thalassia testudinum): An Unexpected Test of Indicators
The effect of fuel oil on the ultrastructure of the chlorococcal algaScenedesmus armatus
Elemental composition and productivity of cyanobacterial mats in an arid zone estuary in north Western Australia
Extensive cyanobacterial mats are a feature of the high intertidal zone in the Exmouth Gulf, Western Australia. This study provides a description of the position of the mats within the intertidal zone and of the mats elemental composition and productivity. We found that the mats occupied 40 cm elevational range within the intertidal zone. They have a mean organic matter content of 1,600 g m(-2). Mean concentrations of nitrogen (N) were 1.82 g kg(-1) and phosphorus (P) 205 mg kg(-1). N:P ratio was 19.7 indicating P limitation, but N:P was variable. Rates of photosynthesis and biomass production were similar to those reported for mats in hypersaline conditions at other sites. When photosynthetic production was scaled-up for the region our data suggest that cyanobacterial mats are an important contributor to the carbon budget in the Exmouth Gulf, contributing between 5 and 15% of the total carbon fixed by primary producers. Additionally mats were observed to be a source of soluble carbohydrates in tidal waters indicating that fixed carbon from high intertidal cyanobacterial mats may enter near shore food webs through this pathway
Plant water relations and ion homoeostasis of Mediterranean seagrasses (Posidonia oceanica and Cymodocea nodosa) in response to hypersaline stress
Postprint2,011
Water relations and osmolyte concentrations in Mediterranean seagrasses (Posidonia oceanica and Cymodocea nodosa) in response to simulated salinity increase
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