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118 results for “ocean warming”

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dryad36/100

Data for: Variable food alters responses of larval crown-of-thorns starfish to ocean warming but not acidification

We examined whether warming, acidification, and different food availability regimes interacted to affect the survival, development, and growth of larval crown-of-thorns starfish, Acanthaster sp. (CoTS). Larvae were reared in all combinations of two temperatures (26, 30 °C), two pH levels (pH 8.0, 7.6), and three food regimes ('low' ration: 1,000 cells mL-1; 'switch' ration: 1,000 cells mL-1 until day 11, followed by 50,000 cells mL-1; and 'high' ration: 50 000 cells mL-1).

opencc-zeroJun 2023View details →

zenodo36/100

Simulated Warming Hole in Paleo-Pacific Oceans

Data generated in this study are archived here.

opencc-by-4.0Jul 2023View details →

dryad36/100

Data from: Jeju Island: a sentinel for tracking ocean warming impacts on high-latitude benthic communities

As climate changes and anthropogenic pressures increase, marine ecosystem assembly and functioning are altered. High-latitude areas may provide opportunities for some tropical and subtropical organisms to survive. Yet, it is difficult to assess ongoing changes as ecological baselines are often missing. Here, we focus on the rapidly warming region of Jeju Island (South Korea), where thermal changes may have already triggered a poleward expansion of tropical and subtropical taxa and changes in community assembly. In 2012–2014, an island-wide quantitative description of its benthic communities (5 m and 15 m depths) was made, whereas patterns in seawater temperatures were examined from 1981 to 2020. The Jeju Island algal assemblage was dominated by the regionally endemic kelp, Ecklonia cava. Turf, encrusting coralline algae, alongside tropical, subtropical, and cosmopolitan macro-algae were also major components of the benthic community. Hermatypic coral cover was higher at the 15 m depth than 5 m depth. Increases in seawater temperatures were highly significant, with differences between the average annual SST [1980–2020] and annual SST reaching up to + 1.61 °C in only 40 yr. The thermal rise was more pronounced in winter than summer, and warming was further accompanied by a major decline in the number of days below 14 °C and 18 °C, which are considered critical thermal thresholds for hermatypic coral survival and reef development, respectively. Warming winter seawater temperatures could ultimately lead to a loss of seasonality and profound modifications of benthic assemblages. This study provides the necessary assessment of benthic community conditions at Jeju Island upon which the ongoing changes in the area can be explicitly demonstrated.

opencc-zeroJul 2023View details →

dryad36/100

Optimal thermal conditions for corals extend poleward with oceanic warming

The capacity for poleward range expansions beyond the tropics in corals hinges on ecophysiological constraints and resulting responses to climatic variability. We applied thermal physiological constraints of corals adapted to extreme seasonality in Hong Kong, specifically the minimum annual temperature and the proportion of time annually spent at seasonal extremes, to ask how warming will affect habitat suitability at the poleward range edges of these foundational species in the Northwest Pacific. Climate model projections reveal an easing of thermal constraints on the leading edge of coral ecophysiological limits with an expansion of thermally suitable habitat poleward by 2-7 degrees in latitude depending on the coral species and model considered. We also highlight a potential divergence of present and future thermal regimes that may lead to a mismatch in suitability for corals currently inhabiting high-latitude reefs. Understanding the thermal constraints on coral range expansions and defining the potential range of corals is critical for adaptive management that focuses on coral conservation and ensuring ecosystem function of existing subtropical and temperate ecosystems.

opencc-zeroAug 2023View details →

dryad36/100