Impact of Marine Heatwaves on Seagrass Ecosystems

Serrano, Óscar; Arias‐Ortiz, Ariane; Duarte, Carlos M.; Kendrick, Gary A.; Lavery, Paul

doi:10.1007/978-3-030-71330-0_13

Cited by 26 publications

(18 citation statements)

References 69 publications

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“…Where the literature has identified a role of ecosystem-based adaptation or nature-based solutions has been highlighted. However, responses to compound climate impacts are necessary for all of life on earth including ecosystems 146 , 147 , 148 and the ecological infrastructures they provide. 149 , 150 These broader response domains also need to be better understood for how they relate to human adaptation to climate change.…”

Section: Resultsmentioning

confidence: 99%

Adaptation to compound climate risks: A systematic global stocktake

Simpson¹,

Williams²,

Mach³

et al. 2023

iScience

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Section: Resultsmentioning

confidence: 99%

Adaptation to compound climate risks: A systematic global stocktake

Simpson¹,

Williams²,

Mach³

et al. 2023

iScience

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“…Rising temperatures have affected the global distribution of seagrasses (Duarte et al ., 2018). Shark Bay, a UNESCO World Heritage Site in Western Australia (Gathaagudu in the local Malgana language), is shaped by extensive seagrass meadows (4300 km 2 ) which constitute up to 2.4% of the mapped global seagrass area (Serrano et al ., 2021). Shark Bay seagrass meadows are dominated by habitat‐forming temperate Amphibolis antarctica and Posidonia australis (mostly an expansive polyploid clone; Edgeloe et al ., 2022) growing at the northern extent of their biogeographical ranges (Hyndes et al ., 2017).…”

Section: Introductionmentioning

confidence: 99%

Marine heatwave and reduced light scenarios cause species‐specific metabolomic changes in seagrasses under ocean warming

et al. 2023

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Summary Climate change and extreme climatic events, such as marine heatwaves (MHWs), are threatening seagrass ecosystems. Metabolomics can be used to gain insight into early stress responses in seagrasses and help to develop targeted management and conservation measures. We used metabolomics to understand the temporal and mechanistic response of leaf metabolism in seagrasses to climate change. Two species, temperate Posidonia australis and tropical Halodule uninervis, were exposed to a combination of future warming, simulated MHW with subsequent recovery period, and light deprivation in a mesocosm experiment. The leaf metabolome of P. australis was altered under MHW exposure at ambient light while H. uninervis was unaffected. Light deprivation impacted both seagrasses, with combined effects of heat and low light causing greater alterations in leaf metabolism. There was no MHW recovery in P. australis. Conversely, the heat‐resistant leaf metabolome of H. uninervis showed recovery of sugars and intermediates of the tricarboxylic acid cycle under combined heat and low light exposure, suggesting adaptive strategies to long‐term light deprivation. Overall, this research highlights how metabolomics can be used to study the metabolic pathways of seagrasses, identifies early indicators of environmental stress and analyses the effects of environmental factors on plant metabolism and health.

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“…production) in combination with future projections of seagrass performance under different climate scenarios and prioritization of conservation actions based on specific seagrass traits (e.g. heat resilient genotypes) could be effective tools towards the sustainable management of the meadows (Serrano et al ., 2021). Management efforts should include local‐scale planning accounting for the dynamic nature of the meadows and be multidisciplinary, bringing together the scientific community with local authorities and stakeholders and focusing primarily on prevention before mitigation (Unsworth et al ., 2019).…”

Section: Discussionmentioning

confidence: 99%

Decline of seagrass (Posidonia oceanica) production over two decades in the face of warming of the Eastern Mediterranean Sea

et al. 2023

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Summary The response of Posidonia oceanica meadows to global warming of the Eastern Mediterranean Sea, where the increase in sea surface temperature (SST) is particularly severe, is poorly investigated. Here, we reconstructed the long‐term P. oceanica production in 60 meadows along the Greek Seas over two decades (1997–2018), using lepidochronology. We determined the effect of warming on production by reconstructing the annual and maximum (i.e. August) SST, considering the role of other production drivers related to water quality (i.e. Chla, suspended particulate matter, Secchi depth). Grand mean (±SE) production across all sites and the study period was 48 ± 1.1 mg DW per shoot yr−1. Production over the last two decades followed a trajectory of decrease, which was related to the concurrent increase in annual SST and SSTaug. Annual SST > 20°C and SSTaug > 26.5°C was related to production decline (GAMM, P < 0.05), while the rest of the tested factors did not help explain the production pattern. Our results indicate a persistent and increasing threat for Eastern Mediterranean meadows, drawing attention to management authorities, highlighting the necessity of reducing local impacts to enhance the resilience of seagrass meadows to global change threats.

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Impact of Marine Heatwaves on Seagrass Ecosystems

Cited by 26 publications

References 69 publications

Adaptation to compound climate risks: A systematic global stocktake

Adaptation to compound climate risks: A systematic global stocktake

Marine heatwave and reduced light scenarios cause species‐specific metabolomic changes in seagrasses under ocean warming

Decline of seagrass (Posidonia oceanica) production over two decades in the face of warming of the Eastern Mediterranean Sea

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