scholarly journals Profiling of Phenolic Natural Products in the Seagrass Zostera noltei by UPLC-MS

2017 ◽  
Vol 12 (5) ◽  
pp. 1934578X1701200 ◽  
Author(s):  
Lauren Manck ◽  
Ester Quintana ◽  
Rocío Suárez ◽  
Fernando G. Brun ◽  
Ignacio Hernández ◽  
...  
Keyword(s):  
Natural Products ◽  
Rosmarinic Acid ◽  
Ecological Functions ◽  
Marine Plants ◽  
Zostera Noltei ◽  
Natural Park ◽  
Intraspecific Variations ◽  
The Common ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz

Seagrasses are marine plants that play important ecological functions in coastal ecosystems. The species Zostera noltei is widely distributed along the European coasts thriving in a variety of environmental conditions. In this study, the phenolic natural products of Z. noltei have been analyzed quantitatively by using UPLC-MS. Plants from the Natural Park of the Bay of Cadiz (Spain) were shown to contain rosmarinic acid (1) and the flavonoids apigenin-7- O-glucoside (2), luteolin-7-sulfate (7), apigenin-7-sulfate (8), diosmetin-7-sulfate (9), and acacetin-7-sulfate (10). The analysis by UPLC-MS of extracts allowed the quantification of all the compounds and evidenced the intraspecific variations in the profile of natural products among plants collected at different dates and locations within the Bay. The flavonoids 2, and 7-10 were present in all the analyzed samples with a total flavonoid content in the range 12.8–72.3 mg/g dry wt, while rosmarinic acid (1) was only present in some samples, reaching up to 19.6 mg/g dry wt. A distinctive feature of plants from the Bay of Cadiz is the common presence of apigenin-7-sulfate (8) as major flavonoid, differing from plants from other regions whose major flavonoid is diosmetin-7-sulfate (9).

scholarly journals Contribution of the UAS to the determination of the water budget in a coastal wetland: a case study in the natural park of the Bay of Cádiz (SW Spain)

2018 ◽  
Vol 51 (1) ◽  
pp. 965-977 ◽  
Author(s):  
Santiago García-López ◽  
Verónica Ruiz-Ortiz ◽  
Luis Barbero ◽  
Ángel Sánchez-Bellón
Keyword(s):  
Water Budget ◽  
Coastal Wetland ◽  
Sw Spain ◽  
Natural Park ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz

scholarly journals Territorial impacts of sea-level rise in marsh environments. The case of the Bay of Cádiz, Spain

2020 ◽  
Author(s):  
F.J. Vázquez Pinillos ◽  
M.J. Marchena Gómez
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Local Level ◽  
Intergovernmental Panel ◽  
Territorial Planning ◽  
Natural Park ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz ◽  
Climate Crisis ◽  
New Situation

How can sea-level rise affect territory? Has territorial planning adjusted to this new situation? This paper analyses the possible ramifications of changes in tidal recurrence over the course of this century in a potentially vulnerable marsh environment, such as the Bay of Cádiz, in southern Spain, where sea-level rise is already a fact. For that purpose, the regionalisation criterion is used as a basis for adjusting the magnitude of global problems to subregional scale. Geographic information systems are applied to portray the forecasted territorial changes according to the RCP4.5 and RCP8.5 scenarios presented by the Intergovernmental Panel on Climate Change (IPCC) for the years 2050 and 2100. Projections of sea-level rise show that the tide is travelling farther inland, not just invading unoccupied areas of marshes and beaches but also reaching urban and productive areas. Estimates indicate that the floodable area could expand by more than 20% in 2050, with a further 2,000 ha of flooded areas added in 2100 for either of the two scenarios used. The occurrence of these changes, regardless of the model used, would therefore entail an alteration of the environmental, social, cultural and economic values and elements of the Bay of Cádiz, with the Natural Park being the most affected area. In response to these consequences, the need to apply the resulting projections to other variables is insisted on, with a view to introducing territorial management tailored to this new and already present reality. Application of the regionalisation criterion to study repercussions of the climate crisis in the Bay of Cádiz could serve as a precedent for the development of adaptation strategies in other marsh environments at subregional or local level.

scholarly journals Coastal Ecosystem Services Assessment in the Framework of the Climate Change Effects: Study Case Bay of Cadiz Natural Park (Spain)

2020 ◽  
pp. 185-200
Author(s):  
Alba López-Herrera ◽  
J. Adolfo Chica-Ruiz ◽  
María Luisa Pérez-Cayeiro
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
Well Being ◽  
Climate Change Effects ◽  
Natural Park ◽  
Regulation Services ◽  
Protected Natural Area ◽  
Services Evaluation ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz

An ecosystem service assessment in the Bay of Cadiz Natural Park has been undergone in relation to the effects of climate change. The ecosystems in the study area were analyzed and 3 different types were indentified: 1) beaches and dunes, 2) marshes and 3) marine environment (including the marine phanerogam meadows), and the ecosystem services (providing, regulating and cultural services) that these ecosystems offer have also been identified. The services state was valued to determine which ones are the most exposed and which the most vulnerable to the climate change effects and its possible future trends through climatic simulators has been made. The results allowed to conclude that most of the ecosystem services showed a negative trend, especially the regulation services which are more associated with the climate change phenomenon. Keywords: Protected natural area, ecosystem services, evaluation of ecosystems, human well-being, climate change.

scholarly journals Using a UAV-Mounted Multispectral Camera for the Monitoring of Marine Macrophytes

2021 ◽  
Vol 8 ◽  
Author(s):  
Alejandro Román ◽  
Antonio Tovar-Sánchez ◽  
Irene Olivé ◽  
Gabriel Navarro
Keyword(s):  
Minimum Distance ◽  
Anthropogenic Activities ◽  
Seagrass Meadows ◽  
Natural Park ◽  
Marine Macrophytes ◽  
Caulerpa Prolifera ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz ◽  
Multispectral Camera

Marine macrophytes constitute one of the most productive ecosystems on the planet, as well as one of the most threatened by anthropogenic activities and climate change. Their monitoring is therefore essential, which has experienced a fast methodological evolution in recent years, from traditional in situ sampling to the use of satellite remote sensing, and subsequently by sensors mounted on unmanned aerial vehicles (UAV). This study aims to advance the monitoring of these ecosystems through the use of a UAV equipped with a 10-band multispectral camera, using different algorithms [i.e., maximum likelihood classifier (MLC), minimum distance classifier (MDC), and spectral angle classifier (SAC)], and using the Bay of Cádiz Natural Park (southern Spain) as a case of study. The results obtained with MLC confirm the suitability of this technique for detecting and differentiating seagrass meadows in a range of 0–2 m depth and the efficiency of this tool for studying and monitoring marine macrophytes in coastal areas. We inferred the existence of a cover of 25452 m2 of Cymodocea nodosa, and macroalgae species such as Caulerpa prolifera, covering 22172 m2 of Santibañez (inner Bay of Cádiz).

Formal Total Syntheses of Crocacin A-D

2005 ◽  
Vol 70 (10) ◽  
pp. 1696-1708 ◽  
Author(s):  
Magnus Besev ◽  
Christof Brehm ◽  
Alois Fürstner
Keyword(s):  
Natural Products ◽  
Aldol Reaction ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Total Syntheses ◽  
Cross Coupling Reactions ◽  
Palladium Catalyzed ◽  
The Common ◽  
Selective Addition

A concise route to the common polyketide fragment5of crocacin A-D (1-4) is presented which has previously been converted into all members of this fungicidal and cytotoxic family of dipeptidic natural products by various means. Our synthesis features asyn-selective titanium aldol reaction controlled by a valinol-derived auxiliary, a zinc-mediated, palladium-catalyzedanti-selective addition of propargyl mesylate10to the chiral aldehyde9, as well as a comparison of palladium-catalyzed Stille and Suzuki cross-coupling reactions for the formation of the diene moiety of the target.

scholarly journals Chloropinane and Chloromenthene as Novel Solvents for Solubilisation of Natural Substances

Molbank ◽  
10.3390/m1205 ◽  
2021 ◽  
Vol 2021 (2) ◽  
pp. M1205
Author(s):  
Mohamed Touaibia ◽  
Anne-Sylvie Fabiano-Tixier ◽  
Farid Chemat
Keyword(s):  
Natural Products ◽  
Renewable Resources ◽  
Rosmarinic Acid ◽  
Natural Substances ◽  
Β Carotene ◽  
Better Than

Chloropinane and chloromenthene, synthesized from pinene and limonene, respectively, were compared with their non-halogenated analogs and n-hexane for their ability to solubilize natural products of interest such as β-carotenoids, vanillin, and rosmarinic acid. Chloropinane was six times more efficient than hexane for β-carotene solubilization. Chloromenthene was 15 times better than hexane. Vanillin was 20 times more soluble in chloropinane than in hexane. Chloropinane and chloromenthene were 3.5 and 2 times more efficient than hexane for rosmarinic acid solubilization. Obtained from pinene and limonene, two very abundant natural products, and even from their waste byproducts, chloropinane and chloromenthene can be an alternative to solvents from non-renewable resources.

Synthetic Strategies to Access Heteroatomic Spirocentres Embedded in Natural Products

Synthesis ◽  
2021 ◽  
Author(s):  
Michael P. Badart ◽  
Bill C. Hawkins
Keyword(s):  
Natural Products ◽  
Heterocyclic Compound ◽  
Chemical Space ◽  
Three Dimensional ◽  
Coupling Reactions ◽  
Conjugate Additions ◽  
Biological Targets ◽  
Compound Libraries ◽  
The Common ◽  
Significant Attention

AbstractThe spirocyclic motif is abundant in natural products and provides an ideal three-dimensional template to interact with biological targets. With significant attention historically expended on the synthesis of flat-heterocyclic compound libraries, methods to access the less-explored three-dimensional medicinal-chemical space will continue to increase in demand. Herein, we highlight by reaction class the common strategies used to construct the spirocyclic centres embedded in a series of well-studied natural products.1 Introduction2 Cycloadditions3 Palladium-Catalysed Coupling Reactions4 Conjugate Additions5 Imines, Aminals, and Hemiaminal Ethers6 Mannich-Type Reactions7 Oxidative Dearomatisation8 Alkylation9 Organometallic Additions10 Conclusions

scholarly journals UAS Identify and Monitor Unusual Small-Scale Rhythmic Features in the Bay of Cádiz (Spain)

2021 ◽  
Vol 13 (6) ◽  
pp. 1188
Author(s):  
Lara Talavera ◽  
Javier Benavente ◽  
Laura Del Río
Keyword(s):  
Monitoring Program ◽  
Wave Theory ◽  
Circulation Pattern ◽  
Low Energy ◽  
Small Scale ◽  
Unmanned Aerial Systems ◽  
Spatiotemporal Resolution ◽  
Novel Technologies ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz

Unusual shore-normal and barred-like rhythmic features were found in Camposoto Beach (Bay of Cádiz, SW Spain) during a monitoring program using unmanned aerial systems (UAS). They appeared in the backshore and persisted for 6 months (October 2017–March 2018). Their characteristics and possible formation mechanism were investigated analyzing: (1) UAS-derived high-resolution digital elevation models (DEMs), (2) hydrodynamic conditions, and (3) sediment samples. The results revealed that the features did not migrate spatially, that their wavelength was well predicted by the edge wave theory, and that they shared characteristics with both small-scale low-energy finger bars (e.g., geometry/appearance and amplitude) and swash cusps (e.g., wavelength, seaward circulation pattern, and finer and better sorted material in the runnels with respect to the crests). Our findings pinpoint to highly organized swash able to reach the backshore during spring tides under low-energy and accretionary conditions as well as backwash enhanced by conditions of water-saturated sediment. This study demonstrates that rhythmic features can appear under different modalities and beach locations than the ones observed up to date, and that their unusual nature may be attributed to the low spatiotemporal resolution of the traditional coastal surveying methods in comparison with novel technologies such as UAS.

Seasonality in a taxocoenosis of molluscs from soft bottoms in the Bay of Cádiz (southern Spain)

2001 ◽  
Vol 81 (6) ◽  
pp. 903-912 ◽  
Author(s):  
Jose L. Rueda ◽  
Manuel Fernández-Casado ◽  
Carmen Salas ◽  
Serge Gofas
Keyword(s):  
Species Richness ◽  
Correspondence Analysis ◽  
Dominant Species ◽  
Southern Spain ◽  
Soft Bottom ◽  
Soft Bottoms ◽  
High Species Richness ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz ◽  
Autumn And Winter

The macrofauna of molluscs associated with soft bottoms in the Bay of Cádiz (southern Spain) was studied monthly from February 1994 to January 1996. The number of species (63) is high for a soft bottom and is related to environmental characteristics (growth of macrophytes) and the biogeographical setting of the studied area. Corbula gibba (∼90%) was the dominant species in this taxocoenosis together with the gastropod Nassarius pygmaeus and the bivalves Pandora inaequivalvis, Parvicardium exiguum and Macoma melo. The most frequent species during the two years was also the bivalve Corbula gibba (100%) followed by the gastropods Nassarius pygmaeus, Tricolia tenuis, Rissoa membranacea and the bivalve Macoma melo. Total abundance of the taxocoenosis in both years reached higher values in spring. The dynamics of the ecological indices such as diversity or evenness, and the species richness showed a similar pattern in both years, with low values of diversity and evenness together with high species richness in spring and summer months and the reverse in autumn and winter. The qualitative correspondence analysis of monthly samples shows an ordination related to seasonality in both studied years, however the values of Jaccard's coefficient do not indicate significant boundaries among the monthly samples. The quantitative correspondence analysis shows an ordination and grouping of samples related to the biology of species, particularly with the recruitment of C. gibba, the dominant species. The existence of similar trends in the structure of the taxocoenoses over both years, and the seasonality highlighted by the qualitative correspondence analysis, seems to indicate a certain stability of the ecosystem.

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