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Paper

Written Paper

From:
Edith Cowan University

The distribution of barium (Ba) in seawater was determined in the main basins and straits of the Mediterranean Sea during the GEOTRACES GA-04S MedSeA cruise. In addition, the concentrations of Ba and radium (Ra) isotopes ( 228 Ra) were determined in groundwaters discharging in the Mediterranean Sea. The dissolved Ba concentration increases from the inflowing Atlantic surface water (Ba ~ 45 nmo ...

SUBJECT: barium; internal cycling; mediterranean sea; submarine groundwater discharge; radium

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Paper

Written Paper

From:
Edith Cowan University

The global ocean has warmed substantially over the past century, with far-reaching implications for marine ecosystems 1 . Concurrent with long-term persistent warming, discrete periods of extreme regional ocean warming (marine heatwaves, MHWs) have increased in frequency 2 . Here we quantify trends and attributes of MHWs across all ocean basins and examine their biological impacts from species ...

SUBJECT: continental shelf; current; western boundary current; ecosystem ecology

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Paper

Written Paper

From:
Edith Cowan University

Seagrass meadows form valuable ecosystems, but are considered to have low cultural value due to limited research efforts in this field. We provide evidence that seagrass deposits play a hitherto unrealized central role in preserving valuable submerged archaeological and historical heritage across the world, while also providing an historical archive of human cultural development over time. We ...

SUBJECT: sediment deposits; ecological service; conservation; cultural heritage; seagrass

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Paper

Written Paper

From:
Edith Cowan University

Calcium carbonates (CaCO 3 ) often accumulate in mangrove and seagrass sediments. As CaCO 3 production emits CO 2 , there is concern that this may partially offset the role of Blue Carbon ecosystems as CO 2 sinks through the burial of organic carbon (C org ). A global collection of data on inorganic carbon burial rates (C inorg , 12% of CaCO 3 mass) revealed global rates of 0.8 TgC inorg yr −1 ...

SUBJECT: burial; seagrass; mangrove; carbon

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Paper

Written Paper

From:
Edith Cowan University

Determining and predicting species’ responses to climate change is a fundamental goal of contemporary ecology. When interpreting responses to warming species are often treated as a single physiological unit with a single species-wide thermal niche. This assumes that trailing edge populations are most vulnerable to warming, as it is here where a species’ thermal niche will be exceeded first. Lo ...

SUBJECT: climate change; laminaria digitata; heat shock

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Paper

Written Paper

From:
Edith Cowan University

The global ocean has warmed substantially over the past century, with far-reaching implications for marine ecosystems 1 . Concurrent with long-term persistent warming, discrete periods of extreme regional ocean warming (marine heatwaves, MHWs) have increased in frequency 2 . Here we quantify trends and attributes of MHWs across all ocean basins and examine their biological impacts from species ...

SUBJECT: continental shelf; current; western boundary current; ecosystem ecology

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Journal Article

Journal article

From:
Edith Cowan University

Translocation of carbon (C) and nitrogen (N) was investigated in response to shading of the seagrass Posidonia sinuosa in control (ambient light) and shade (below minimum light requirement) treatments after 10 d shading. A mature leaf was incubated in situ in 13C- and 15N-enriched seawater for 2 h and the appearance of the isotopes in the young leaf and adjacent rhizome monitored over 29 d. C ...

SUBJECT: translocation; life sciences; stable isotope; tracer experiment; [rstdpub]

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Journal Article

Journal article

From:
Edith Cowan University

Knowledge of the population structure and feeding capabilities of herbivores is critical to evaluate their influence on energy flow and community structure in their habitats. We tested for patterns in abundance (24 reefs) and size (12 reefs) of turbinid gastropods across 4 locations spanning >6° latitude (~1000 km) in Western Australia, and we tested the effect of density (1 to 5 individuals) ...

SUBJECT: kelp beds; life sciences; turbo torquatus; turbinid gastropods; population structure

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Journal Article

Journal article

From:
Edith Cowan University

The response of the meadow-forming seagrass Amphibolis griffithii (Black) den Hartog to light reduction was examined over a 3 mo period and a subsequent 1 mo recovery period. Morphological and physiological variables were measured in meadows subjected to an average reduction in photosynthetic photon flux density (PPFD) of 88% relative to unshaded controls. Leaf biomass, leaf cluster density an ...

SUBJECT: life sciences

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Journal Article

Journal article

From:
Edith Cowan University

The responses of the seagrass Amphibolis griffithii to different experimental shading conditions were examined by characterising biomass, morphological and physiological features. In an in situ experiment, the intensity (ambient, moderate shading [13 to 19% of ambient] and high shading [5 to 11% of ambient]), duration (3, 6, 9 mo) and timing (post-summer, post-winter) of light reductions were ...

SUBJECT: life sciences

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