Understanding the true metabolizable energy (TME) of foods is critical to estimating the energetic carrying capacity of landscapes for migrating and wintering waterfowl.We estimated gross energy, nutrient composition, and TMEN (TME corrected for zero nitrogen balance) for 7 foods that are commonly found in the diet of American black duck (Anas rubripes) and other waterfowl wintering along the A...

Seagrass meadows rank among the most significant organic carbon (Corg) sinks on earth. We examined variability in seagrass soil Corg stocks and composition across Australia identified main drivers of variability, applying a spatially hierarchical approach that incorporates bioregions geomorphic settings. Top 30 cm were similar settings (min-max: 20–26 Mg ha?1), but formed by large species (i.e....

The characteristics of the fish faunas in nearshore, shallow (< 1.2 m) waters of the basins of estuaries along the same coastline, but which were open to the ocean for varying periods, have been determined and compared. The fish faunas of the permanently-open Oyster Harbour, the seasonally-open Broke, Irwin and Wilson inlets and the normally-closed Wellstead Estuary on the south coast of Wester...

Plant species usually have either annual or perennial life cycles, but facultative populations depending on their environment. In terrestrial angiosperms, are rare, with wild rice being one of the few examples. Our review shows that in marine angiosperms (seagrasses) more common: six (of 63) seagrass annual. It concerns Zostera marina, Z. japonica, Halophila decipiens, H. beccarii, Ruppia marit...

The structure of a fish food-web was described for the first time in coastal lagoon southern Mediterranean Sea by analysing stable carbon and nitrogen isotopes species their potential food sources. El Mellah Lagoon (EML) located extreme north-eastern Algeria, is only with low human pressure due to few activities its protected status under Ramsar Convention. We investigated spring at four statio...

We report for the first time that marine angiosperms (seagrasses) possess sulfated polysaccharides, which are absent in terrestrial and freshwater plants. The structure of the sulfated polysaccharide from the seagrass Ruppia maritima was determined. It is a sulfated D-galactan composed of the following regular tetrasaccharide repeating unit: [3-beta-D-Gal-2(OSO3)-1-->4-alpha-D-Gal-1-->4-alpha-D...

As plants have been shown to accumulate organic compounds from contaminated sediments, there is a potential for long-lasting ecological impact as a result of contaminant accumulation in riparian areas of wetlands, particularly the accumulation of non-biodegradable contaminants such as perfluorooctanoic acid (PFOA). In this study, commonly found riparian wetland plants including reeds, i.e., Xan...

Climate change-related events, such as marine heatwaves, are increasing seawater temperatures, thereby putting pressure on biota. The cosmopolitan distribution and significant contribution to primary production by the genus Ruppia makes them interesting organisms study thermal tolerance local adaptation. In this study, we investigated photosynthetic responses in predicted future warming two con...