Interactive effects of global warming and eutrophication on a fast-growing Mediterranean seagrass

Ontoria, Yaiza; Gonzalez-Guedes, Eva; Sanmartí, Neus; Bernardeau-Esteller, Jaime; Ruiz, Juan Manuel García; Romero, Javier; Pérez, Marta

doi:10.1016/j.marenvres.2019.02.002

Cited by 50 publications

(50 citation statements)

References 80 publications

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“…With the exception of a few studies on seedlings from temperate seagrasses in which no positive effects on physiology, growth, survival or photosynthetic potential were observed with nutrients (Glasby et al, 2014;Alexandre et al, 2018), most studies on nutrientenrichment effects have been done on adult stages of seagrasses with mixed results. For example, while nutrient enrichment often has an effect on seagrass tissue nutrient content (e.g., Ontoria et al, 2019;Viana et al, in prep), it does not always have a significant effect on leaf length, leaf width and seagrass production, as has been shown in Thalassia testudinum (Heck et al, 2000). Z. marina, on the other hand, has been found to survive and stay healthy under high nutrient enrichment for 2 weeks, as under natural conditions this species is acclimated and often exposed to high nutrient concentrations (Kaldy, 2014).…”

Section: Seedling Response To Increased Nutrientsmentioning

confidence: 99%

“…But seagrass plants are rarely affected by just one variable and identifying the effect of single stressors is a challenge in natural seagrass meadows. The interaction between stressors is now viewed as a crucial issue, and it is suggested that singlefactor experiments are not adequate for assessing the effects of several disturbances on coastal marine ecosystems (Wernberg et al, 2012;Todgham and Stillman, 2013;Ontoria et al, 2019). In this way, laboratory experiments under controlled conditions might help to isolate the effects on plant trait variability of single and multiple stressors.…”

Section: Introductionmentioning

confidence: 99%

“…The combined impacts of rising temperature and increased nutrient loading has been studied in adult species of Zostera spp. and Cymodocea nodosa (Touchette and Burkholder, 2002;Touchette et al, 2003;Kaldy, 2014;Jiménez-Ramos et al, 2017;Mvungi and Pillay, 2019;Ontoria et al, 2019), but, as far as we know, no studies were carried out in seagrass early life stages. There are few works on the combined effects of other stressors in seagrass seedlings but none in tropical species (Hernán et al, 2016;Alexandre et al, 2018;Pereda-Briones et al, 2018Yue et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Morphological and Physiological Responses of Enhalus acoroides Seedlings Under Varying Temperature and Nutrient Treatment

et al. 2020

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Seagrass meadows are declining globally. In Indonesia, 75% loss has been reported in the last 5 years. The decrease of the seagrass area is influenced by the simultaneous occurrence of many factors at the local and global scale, including nutrient enrichment and climate change. This study aims to find out how increasing temperature and nutrient enrichment affect the morphological, biochemical and physiological responses of Enhalus acoroides in the seedling phase, which has not previously been studied. To achieve these aims, a laboratory experiment of combined temperature and nutrient treatments was conducted using recently-germinated seedlings of E. acoroides. The results showed that the seedlings were tolerant to an extended exposure to the current ambient maximum temperature. Under higher temperature treatment, the seedlings were observed to increase in aboveground size traits (e.g., number of leaves, leaf length, biomass, and leaf area), as well as in belowground traits, such as root length. The results in this study also showed that the initial seed size matters for morphological responses. On the contrary, nutrient responses of seedlings were practically absent, suggesting they could rely on internal reserves. Interaction between both factors was limited, with the exception of low temperature and high nutrient treatment, in which the AG:BG ratio and leaf elongation rate increased. Fluorescence parameters were not influenced by any of the water treatments. The results in this study suggest that E. acoroides seedlings rely energetically in the reserves within the seedling and that increasing temperature might result in faster seedling development, although no interactions with other organisms were tested. This is of importance when studying the resilience capacity of this species and when restoration attempts are planned, as a faster root development would provide a faster stabilization in the sediment and the survival of the whole plant.

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Section: Seedling Response To Increased Nutrientsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphological and Physiological Responses of Enhalus acoroides Seedlings Under Varying Temperature and Nutrient Treatment

et al. 2020

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“…Decline of P. oceanica in Liguria has often been coupled with its replacement by the more tolerant seagrass Cymodocea nodosa (Bianchi & Peirano 1995;Montefalcone et al 2006a;Barsanti et al 2007): such a replacement might be favoured by sea water warming (Ontoria et al 2019), but showed an obvious positive relationship with the increased artificialization of the coastline (Figure 10(b)). In recent years, C. nodosa was in turn partly replaced first by the native green alga Caulerpa prolifera and then by its two alien congeneric C. taxifolia and, especially, C. cylindracea (Montefalcone et al 2007c(Montefalcone et al , 2010b(Montefalcone et al , 2015.…”

Section: Seagrass Meadowsmentioning

confidence: 99%

Consequences of the marine climate and ecosystem shift of the 1980-90s on the Ligurian Sea biodiversity (NW Mediterranean)

Bianchi

Azzola

Bertolino

et al. 2019

The European Zoological Journal

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A rapid temperature increase in the 1980-90s has been accompanied by dramatic and unprecedented changes in the biota and communities of the Ligurian Sea. This review uses existing historical series (a few of which have been purposely updated) to assess extent and consequences of such changes. A number of warm-water species, previously absent or occasional in the comparatively cold Ligurian Sea, has recently established thanks to warmer winters. Occurrence among them of invasive alien species is causing concern because of their capacity of outcompeting autochthonous species. Summer heatwaves, on the other hand, caused mass mortalities in marine organisms, some of which found refuge at depth. New marine diseases appeared, as well as other dysfunctions such as the formation of mucilage aggregates that suffocated and entangled benthic organisms. Human pressures have combined with climate change to cause phase shifts (i.e., abrupt variations in species composition and community structure) in different habitats, such as the pelagic environment, seagrass meadows, rocky reefs, and marine caves. These phase shifts implied biotic homogenization, reduction of diversity, and dominance by invasive aliens, and may be detrimental to the resilience of Ligurian Sea ecosystems. Another phase of rapid warming has possibly started in the 2010s and there are clues pointing to a further series of biological changes, but data are too scarce to date for proper assessment. Only well addressed long-term studies will help understanding the future dynamics of Ligurian Sea ecosystems and their possibilities of recovery.

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“…Beauty of forest attracts tourists and also forest gives different things for human beings such as food, shelter, medicine etc. But the human activities such as continuous or unscientific harvesting can negatively affect on forest biomass (Li et al, 2019;Ontoria et al, 2019;Vogt Kristina et al, 2007). Pingoud et al (2012) investigated the potential factors of global warming and the effects of use of forest biomass.…”

Section: Introductionmentioning

confidence: 99%

Is the forest biomass a key regulator of global warming?: A mathematical modelling study

Panja

2020

Geology, Ecology, and Landscapes

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In this article, a mathematical model has been formulated by considering forest biomass and global warming as a separate compartment. It is assumed that the forest biomass follow logistic growth in the absence of global warming. It is also assumed that the growth of forest biomass is affected by global warming. It is considered that the density of forest biomass decreases due to natural burning of forests, cut down of forest biomass by human beings and continuous harvesting of forest biomass by human being. It is found that if we can increase the area of forest biomass then the rate of increase of global warming will be reduced. It is also found that if the harvesting rate of forest biomass increases, then global warming will be gradually increased. Finally, some numerical simulation results have been presented.

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Interactive effects of global warming and eutrophication on a fast-growing Mediterranean seagrass

Cited by 50 publications

References 80 publications

Morphological and Physiological Responses of Enhalus acoroides Seedlings Under Varying Temperature and Nutrient Treatment

Morphological and Physiological Responses of Enhalus acoroides Seedlings Under Varying Temperature and Nutrient Treatment

Consequences of the marine climate and ecosystem shift of the 1980-90s on the Ligurian Sea biodiversity (NW Mediterranean)

Is the forest biomass a key regulator of global warming?: A mathematical modelling study

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