Vulnerability of Zostera noltei to Sea Level Rise: the Use of Clustering Techniques in Climate Change Studies

Ondiviela, Bárbara Ruiz; Galván, Cristina; Recio, María; Jiménez, Mirian; Juanes, José A.; Puente, Araceli; Losada, Íñigo J.

doi:10.1007/s12237-020-00742-z

Cited by 10 publications

(4 citation statements)

References 45 publications

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“…Studies in the Mediterranean Sea show that extreme summer temperatures provoked high mortality in deep-adapted (17-25 m) populations of Posidonia oceanica which were not able to recover in subsequent years, whereas shallow populations were less affected and recovered fully (Marbà and Duarte, 2010;Aoki et al, 2020). Additionally, projected sea-level rise will further reduce the irradiance available to Z. noltei plants distributed at their deeper range (∼2-2.8 m), resulting in more extreme conditions and physiological stress (Ondiviela et al, 2020). Interestingly, proportions of n−3 PUFA relative to n−6 PUFA in plants receiving less light increased significantly, thus increasing the level of unsaturation of FA in leaves.…”

Section: Synergistic Effects Of Thermal Stress and Light Reduction On Seagrass Traits And Survivalmentioning

confidence: 99%

Seasonal Acclimation Modulates the Impacts of Simulated Warming and Light Reduction on Temperate Seagrass Productivity and Biochemical Composition

et al. 2021

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Increases in seawater temperature and reduction in light quality have emerged as some of the most important threats to marine coastal communities including seagrass ecosystems. Temperate seagrasses, including Zostera marina, typically have pronounced seasonal cycles which modulate seagrass growth, physiology and reproductive effort. These marked temporal patterns can affect experimental seagrass responses to climate change effects depending on the seasons of the year in which the experiments are conducted. This study aimed at evaluating how seasonal acclimatization modulates productivity and biochemical responses of Zostera marina to experimental warming and irradiance reduction. Seagrass shoots were exposed to different temperatures (6, 12, 16, 20, and 24°C), combined with high (180 μmol photons m–2 s–1) and low (60 μmol photons m–2 s–1) light conditions across four seasons (spring: April, summer: July, and autumn: November 2015, and winter: January 2016). Plants exhibited similar temperature growth rates between 16 and 20°C; at 24°C, a drastic reduction in growth was observed; this was more accentuated in colder months and under low irradiance conditions. Higher leaf growth rates occurred in winter while the largest rhizomes were reached in experiments conducted in spring and summer. Increases in temperature induced a significant reduction in polyunsaturated fatty acids (PUFA), particularly omega-3 (n-3 PUFA). Our results highlight that temperate seagrass populations currently living under temperature limitation will be favored by future increases in sea surface temperature in terms of leaf and rhizome productivity. Together with results from this study on Z. marina from a temperate region, a wider review of the reported impacts of experimental warming indicates the likely reduction in some compounds of nutritional importance for higher trophic levels in seagrass leaves. Our results further demonstrate that data derived from laboratory-based studies investigating environmental stress on seagrass growth and acclimation, and their subsequent interpretation, are strongly influenced by seasonality and in situ conditions that precede any experimental exposure.

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Section: Synergistic Effects Of Thermal Stress and Light Reduction On Seagrass Traits And Survivalmentioning

confidence: 99%

Seasonal Acclimation Modulates the Impacts of Simulated Warming and Light Reduction on Temperate Seagrass Productivity and Biochemical Composition

et al. 2021

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“…Seagrass beds are among the most productive habitats, with a wide range of ecosystem services, and could serve as nature-based solutions for mitigating climate change and other human-induced stressors [3,15,16]. The paradox is that seagrasses themselves are highly vulnerable to a variety of pressures that could be exacerbated by climate change impacts [37][38][39], such as sea level rise [40,41], ocean warming [42], and extreme weather events in the form of heat waves and floods [12,20]. Adding to the human-induced stressors, natural causes such as wasting disease can also affect the distribution and density of seagrass meadows [8,43].…”

Section: Discussionmentioning

confidence: 99%

Characterisation and Dynamics of an Emerging Seagrass Meadow

Dolbeth,

Costa,

Meyer

et al. 2023

Remote Sensing

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Seagrasses are habitat-forming species that support biodiversity and a wide range of associated ecosystem services, from blue carbon capture to providing nursery areas for a variety of organisms. Their decline has been documented worldwide and is attributed to human impacts ranging from habitat loss and eutrophication to the effects of climate change. However, recent recovery trends have also been documented due to reductions in stressors, passive and active restoration, and even changes in environmental conditions owing to local management. In this study, we document for the first time the occurrence of Zostera noltei in the downstream area of the River Minho Estuary. This occurrence was unexpected given the hydrological conditions of the estuary, characterised by dredging and siltation. We reconstructed the occurrence and historical distribution of seagrass beds, and showed that they have existed in the region for more than a decade. The current distribution area was mapped using high-resolution multispectral remote sensing techniques, and in situ photoquadrats to complement the remote sensing information with an evaluation of the seagrass cover. A current seagrass area of 0.81 ha was found with an average cover of 70%. However, the Minho Estuary continues to be strongly affected by sediment deposition, which may affect the seagrass population in the long term. Continued surveys are recommended to confirm the long-term trend of colonisation of this important habitat, which ultimately provides so many benefits to coastal ecosystems and humankind.

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“…Conservation of seagrass ecosystems should be a priority worldwide, as the multiple ecosystem services they offer are threatened under the increasing impacts and threats from climate change (Duarte et al, 2018), most likely through the loss of suitable habitats (Dolch and Reise, 2010;Dolch et al, 2013;Short et al, 2016;Ondiviela et al, 2020). Seagrasses are valuable ecosystems for mitigation of climate change given their capacity for carbon sequestration.…”

Section: Discussionmentioning

confidence: 99%

Trade-Offs and Synergies Between Seagrass Ecosystems and Fishing Activities: A Global Literature Review

et al. 2022

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Seagrass ecosystems support human well-being by delivering a wide range of ecosystem services. Particularly important is the significant role they play in food provisioning by supporting fisheries worldwide. Despite their socio-economic importance, it is only recently when they have been considered as important social-ecological systems worldwide. Research focused on the interactions between seagrasses and human activities have been understudied and never addressed from a global approach, even though this knowledge is essential to create relevant policy and management plans, and to promote governance systems, which consider fishers’ needs and rights. Thus, we carried out a global systematic review on trade-offs and/or synergies between seagrasses and fishing activities, aiming to analyse the current state of the art on these interactions, to identify potential gaps in knowledge, and to pinpoint key research priorities. We found a total of 94 publications assessing the relationship between seagrass ecosystems and fisheries, which have tripled between 2001-2021, being most of them empirical studies (90%) with ecological scope (a total of 68). Socioeconomic studies (3%) on the subject were identified as a knowledge gap. Most studies (72%) were carried out in northern hemisphere countries, with an underrepresentation of studies in tropical regions. The studies reporting trade-off (a total of 69) interactions almost tripled those reporting synergies (a total of 31) between seagrass ecosystems and fisheries. Mechanical damage to seagrasses by fishing gear is the main source (51%) of trade-offs, followed by overfishing (28%), while aquaculture cages’ emissions (20%) are also a relevant source of trade-offs. Seafood market demand and conflicts of use were the main drivers for trade-offs. When assessing synergistic interactions, most studies (27 out of 31) reported a larger abundance or recruitment of species with commercial interest mediated by seagrass habitat provision. Globally, seagrass ecosystems are mainly affected by industrial and small-scale fisheries, including aquaculture and shellfisheries, and to a lesser extent, by recreational fisheries. Fisheries management system is not specified in more than half (53) of the reviewed publications, which represents a key knowledge gap with implications for sustainable management. Nevertheless, we document a fast increase in studies covering fishery-seagrass interactions, which, if accompanied by better reporting of the nature of the interactions and the socio-economic context of the fishery, would help improve the sustainable management of both systems.

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Vulnerability of Zostera noltei to Sea Level Rise: the Use of Clustering Techniques in Climate Change Studies

Cited by 10 publications

References 45 publications

Seasonal Acclimation Modulates the Impacts of Simulated Warming and Light Reduction on Temperate Seagrass Productivity and Biochemical Composition

Seasonal Acclimation Modulates the Impacts of Simulated Warming and Light Reduction on Temperate Seagrass Productivity and Biochemical Composition

Characterisation and Dynamics of an Emerging Seagrass Meadow

Trade-Offs and Synergies Between Seagrass Ecosystems and Fishing Activities: A Global Literature Review

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