scholarly journals Distribution and seasonality of the marine macrophytes from Antikyra Gulf (Viotia, Greece)

2001 ◽  
Vol 2 (1) ◽  
pp. 79
Author(s):  
P. MALEA ◽  
S. HARITONIDIS
Keyword(s):  
Posidonia Oceanica ◽  
Qualitative Composition ◽  
Cymodocea Nodosa ◽  
Halophila Stipulacea ◽  
Marine Macrophytes ◽  
First Time

The Gulf of Antikyra (Viotia) with a bauxitic substrate was aggravated by wastes discharged from an Aluminium factory where the Parnassos bauxite is treated Seasonal collections of macrophytes from stations selected inside the Antikyra Gulf were carried out. 85 species of macroalgae were totally collected, out of which 16 belonged to Chlorophyceae, 12 to Phaeophyceae and 57 to Rhodophyceae. There has been no obvious difference in the qualitative composition of the macroalgae as we move away from the area where the wastes are being discharged. Moreover, the stations where depths are greater exhibit different qualitative composition that those with smaller depths. The presence of phanerogams and especially that of Halophila stipulacea, the Lessepsian immigrant, encountered for the first time in the Korinthiakos Gulf, was also evident. The biomass of the three phanerogams decreased with the order: Posidonia oceanica>Cymodocea nodosa>Halophila stipulacea. The biomass of C. nodosaand P. oceanica was higher in July, while that of H. stipulacea was lower in July and higher in March and September.

Variability of foraminifera associations in seagrass ecosystems in shallow water during winter (Kerkennah – Southern Tunisian coasts)

2017 ◽  
Vol 98 (8) ◽  
pp. 1945-1954 ◽  
Author(s):  
Raida Trabelsi ◽  
Jannet Elloumi ◽  
Asma Hamza ◽  
Najla Ayadi ◽  
Ihsen Zghal ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Benthic Foraminifera ◽  
Statistical Study ◽  
Environmental Parameters ◽  
Posidonia Oceanica ◽  
Cymodocea Nodosa ◽  
Seagrass Species ◽  
Halophila Stipulacea ◽  
Seagrass Ecosystem ◽  
Seagrass Ecosystems

This study intends to reliably estimate the general status of the benthic and the epiphytic foraminifera community related to each studied seagrass ecosystem (Posidonia oceanica,Cymodocea nodosaandHalophila stipulacea) distributed in different shallow sites in the coastal archipelago of Kerkennah (Gulf of Gabes, Tunisia) during winter. We were able to first sort and subsequently identify some characteristics conditioning their behaviour. Twenty-four species of foraminifera were encountered. Among them, three epiphytic species identified on these seagrass leaves had a much lower abundance than those in the sediment. We were interested in highlighting the foraminiferal community related toHalophila stipulacea, since this seagrass species is newly introduced into the Mediterranean sea. Thanks to the statistical study, we were able to identify the favourable habitat for epiphytic and benthic foraminifera among the three seagrass ecosystems. A correlation between the identified foraminifera species and some environmental parameters was addressed using a variety of software.

scholarly journals Review of alien marine macrophytes in Tunisia

2015 ◽  
Vol 17 (1) ◽  
pp. 109 ◽  
Author(s):  
Y. R. SGHAIER ◽  
R. ZAKHAMA-SRAIEB ◽  
S. MOUELHI ◽  
M. VAZQUEZ ◽  
C. VALLE ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Codium Fragile ◽  
Halophila Stipulacea ◽  
Marine Macrophytes ◽  
The Status ◽  
The Mediterranean ◽  
First Time ◽  
Eleven Species ◽  
Asparagopsis Armata

In the present study, the list of alien marine macrophytes introduced into Tunisia was updated in the light of available data and new observations. A total of 27 alien marine macrophytes have been recorded so far from Tunisia: 18 Rhodophyta, 3 Ochrophyta, 5 Chlorophyta and 1 Magnoliophyta. For each species, the locality (-ies), the year (or) period and the source of the first observation in Tunisia are given. The distribution and the status (casual, cryptogenic, established or questionable) of species in Tunisia were evaluated and, where appropriate, discussed. Among them, Hypnea cornuta is reported for the first time from Tunisia. Fourteen alien marine macrophytes are established, whereas seven cryptogenic and two casual species require further investigation. Eleven species are considered as invasive or potentially invasive in the Mediterranean Sea: Acrothamnion preissii, Asparagopsis armata, A. taxiformis Indo-Pacific lineage, Hypnea cornuta, Lophocladia lallemandii, Womersleyella setacea, Caulerpa chemnitzia, C. cylindracea, C. taxifolia, Codium fragile subsp. fragile and Halophila stipulacea. Finally, the case of four questionable species is also discussed.

scholarly journals Nuevos datos sobre la floración, fructificación y germinación de fanerógamas marinas en Andalucía.

2006 ◽  
Vol 31 ◽  
pp. 51-72 ◽  
Author(s):  
Diego Moreno ◽  
José Guirado
Keyword(s):  
Zostera Marina ◽  
Fruit Size ◽  
Posidonia Oceanica ◽  
Seedling Development ◽  
Ruppia Maritima ◽  
Cymodocea Nodosa ◽  
Zostera Noltii ◽  
First Time

RESUMEN. Nuevos datos sobre la floración, fructificación y germinación de fanerógamas marinas en Andalucía. Se aportan todos los datos conocidos sobre las floraciones y fructificaciones de las distintas fanerógamas marinas presentes en las provincias de Almería y Granada. Se presentan datos sobre las floraciones de Posidonia oceanica (L.) Delile detectadas en la provincia de Almería en los últimos años, y un caso de floración en la provincia de Granada, así como las fructificaciones y frutos maduros de esta especie en tres años consecutivos (2001/02, 2002/03 y 2003/04), lo que nunca antes se había observado en las costas andaluzas. Se estudia la evolución del tamaño de los frutos a lo largo del desarrollo en P. oceanica, así como la presencia de los frutos en las playas, el número de frutos por infrutescencia, cuántos aparecen con dehiscencia, y el porcentaje de frutos parcialmente o totalmente depredados. Se detecta en Almería (y por primera vez en Andalucía) la germinación natural de semillas de P. oceanica y se estudia el desarrollo de las plántulas en acuario, se obtienen medidas precisas de los frutos y sus semillas, y se comparan con los de otros puntos del Mediterráneo. Se aportan también datos sobre las floraciones y fructificaciones de Cymodocea nodosa (Ucria) Ascher. en Almería; sobre la fructificación de Zostera marina L. en Almería, Granada y también en Málaga; sobre la floración de Zostera noltii Horn. en Almería; y sobre la floración y fructificación de Ruppia maritima L. var. maritima en lagunas litorales y salinas de Almería.Palabras clave. Floración, fructificación, germinación, fanerógamas marinas, S España, Posidonia, Cymodocea, Zostera, RuppiaABSTRACT. New data on flowering, fruiting and germination of marine phanerogams in Andalusia. All the available data on flowering and fruiting of the different seagrasses species from Almería and Granada are presented. Data on flowering of Posidonia oceanica (L.) Delile from the last years in Almería and one event from Granada are showed, and the exceptional fruiting events (with mature fruits) in three consecutive years in Almería (2001/02, 2002/03 y 2003/04) are confirmed, where never before was observed mature fruits. The evolution of fruit size during development in P. oceanica, the number of fruits/infrutescence, the number of fruits with dehiscence, and the average of fruits partial o totally predated, are studied. The natural germination of Posidonia oceanica is detected in Almería (and for the first time in Andalusia), and seedling development is studied in aquarium. Measurements of fruits and seeds of P. oceanica from Almería are taken and compared with other Mediterranean localities. Data on flowering and fruiting of Cymodocea nodosa (Ucria) Ascher. from Almería, of Zostera marina L. from Almería, Granada (and also Málaga), of Zostera noltii Horn. from Almería, and of Ruppia maritima L. var. maritima from littoral lagoons from Almería, are also presented.Key words. Flowering, fruiting, germination, seagrasses, S Spain, Posidonia, Cymodocea, Zostera, Ruppia

Content of amino acids in raw materials of somespecies of ASTERACEAE family

Fitoterapia ◽  
2020 ◽  
Vol 3 (3) ◽  
pp. 44-50
Author(s):  
S.M. Marchyshyn ◽  
◽  
L.V. Slobodianiuk ◽  
R.Yu. Basaraba ◽  
N.А. Hudz ◽  
...  
Keyword(s):  
Amino Acids ◽  
High Performance Liquid Chromatography ◽  
Free Amino ◽  
High Performance ◽  
Raw Materials ◽  
Essential Amino Acids ◽  
Qualitative Composition ◽  
Quantitative Content ◽  
First Time ◽  
Asteraceae Family

Keywords: amino acids; common pussytoes; yacon; stevia; golden marigolds; leaves; herb; aster family; high performance liquid chromatography. For the first time the qualitative composition was studied and the quantitative content of amino acids in the herb of common pussytoes, yacon leaves, stevia leaves, herb of golden marigolds was determined by HPLC. 17 bound and 16 free amino acids were identified in the herb of common pussytoes, in the herb of golden marigolds, yacon leaves and stevia leaves – 12 and 5, 17 and 11 and 16 and 14 amino acids, respectively. The highest content of the sum of essential and substitute amino acids is contained in the leaves of stevia; the lowest content of the sum of essential amino – in the herb of golden marigolds, the sum of essential amino acids – in the herb of common pussytoes.

scholarly journals Ecological and hydrogeological factors of qualitative composition destabilization of drinking groundwater within the central part of DDAB

2019 ◽  
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Water Withdrawal ◽  
Geological Environment ◽  
Qualitative Composition ◽  
Total Water ◽  
Water Quality Control ◽  
Data Set ◽  
Factors Of Influence ◽  
First Time

Formulation of the problem. The paper is devoted to a topical environmental theme – a study of the destabilization of drinking groundwater quality in the conditions of modern intensive technogenesis of geological environment. The purpose of the article is 2 components of a study of the groundwater quality deterioration of buchak-kaniv aquifer: - an identification of the ecological and hydrogeological factors of influence on the water qualitative composition; - an ensuring of the environmentally safe use of groundwater. Materials and methods. The research is based on an analysis of the results of over 700 groundwater chemical analyses of the target aquifer within the region. The chemical researches have been carried out during the period of active man-made pressure on the geological environment of studied territory (1960-2015). The available current data of geological, ecological and neotectonic conditions of studied area have been also used. The following methods of obtaining, processing and interpretation of necessary ecological-hydrogeological data have been used in the paper: field, chemical-analytical, comparative and graphical methods. A number of the common research methods have been used for the information processing – an analysis, a synthesis, a systematization, a classification, a modeling. The mathematical and statistical methods have been also used in the processing of received large data set. The interpolation and analogy methods have been used to simulate changes in the groundwater hydrochemical features using MapInfo Professional 10.0. Results and scientific novelty. For the first time on the basis of analysis of geological, ecological-hydrogeological and neotectonic conditions of region, the factors of influence on the qualitative composition of groundwater at the buchak-kaniv water intakes were revealed. On the basis of these factors – the priority indicators of buchak-kaniv aquifer water quality for its systematic hydrogeochemical monitoring under the infiltration of pollutants from the surface and their inflow from below in the zones of influence of tectonic structures have been proposed. For the first time a direct positive correlation between a change of the content of characteristic indicator elements of influence on the ecological-hydrogeological state of groundwater (mineralization, Cl-, F-, Fetotal, Br-, B3 +, J-) and the value of total water withdrawal in the zone of direct influence of tectonic faults of East-Poltava tectonic structure has been found. An approach for the ecologically safe use of target aquifer waters within the buchak-kaniv water intakes of Eastern Ukraine, which is based on the established correlation between the factors of influence and the qualitative composition of waters, has been developed. Practical significance. Due to an approbation of the proposed water quality control system at the Poltava water intakes network, which is strategically important within the region of research, an optimization of the total water withdrawal at the water intakes has been justified (the recommended limit is 50-60 thousand m3/day). The perspective areas for location of new water intakes within a 40 km radius around Poltava city have been identified (a total area – 750 km2). The estimated resources of drinking groundwater (54.5 thousand m3/day) have been calculated. Due to the using of these resources it is possible to gradually replace the current water supply of urban agglomeration with high-quality groundwater.

scholarly journals Selective DNA and Protein Isolation From Marine Macrophyte Surfaces

2021 ◽  
Vol 12 ◽  
Author(s):  
Marino Korlević ◽  
Marsej Markovski ◽  
Zihao Zhao ◽  
Gerhard J. Herndl ◽  
Mirjana Najdek
Keyword(s):  
16S Rrna ◽  
High Specificity ◽  
Complete Removal ◽  
16S Rrna Sequencing ◽  
Cymodocea Nodosa ◽  
Protein Isolation ◽  
Marine Macrophytes ◽  
Rrna Sequencing ◽  
Epiphytic Communities ◽  
Sampling Season

Studies of unculturable microbes often combine methods, such as 16S rRNA sequencing, metagenomics, and metaproteomics. To apply these techniques to the microbial community inhabiting the surfaces of marine macrophytes, it is advisable to perform a selective DNA and protein isolation prior to the analysis to avoid biases due to the host material being present in high quantities. Two protocols for DNA and protein isolation were adapted for selective extractions of DNA and proteins from epiphytic communities inhabiting the surfaces of two marine macrophytes, the seagrass Cymodocea nodosa and the macroalga Caulerpa cylindracea. Protocols showed an almost complete removal of the epiphytic community regardless of the sampling season, station, settlement, or host species. The obtained DNA was suitable for metagenomic and 16S rRNA sequencing, while isolated proteins could be identified by mass spectrometry. Low presence of host DNA and proteins in the samples indicated a high specificity of the protocols. The procedures are based on universally available laboratory chemicals making the protocols widely applicable. Taken together, the adapted protocols ensure an almost complete removal of the macrophyte epiphytic community. The procedures are selective for microbes inhabiting macrophyte surfaces and provide DNA and proteins applicable in 16S rRNA sequencing, metagenomics, and metaproteomics.

scholarly journals The “good, the bad and the double-sword” effects of exposure to MPs and their organic additives on N2-fixing bacteria

2020 ◽  
Author(s):  
Víctor Fernández-Juárez ◽  
Xabier López-Alforja ◽  
Aida Frank-Comas ◽  
Pedro Echeveste ◽  
Antoni Bennasar-Figueras ◽  
...  
Keyword(s):  
Posidonia Oceanica ◽  
Dioctyl Phthalate ◽  
Benthic Organisms ◽  
Protein Overexpression ◽  
Organic Additives ◽  
Physical Interactions ◽  
High Concentrations ◽  
Species Specific ◽  
Micro Organisms ◽  
First Time

AbstractThe accumulation of microplastics (MPs) pollution at depths suggests the susceptibility of benthic organisms (e.g. seagrasses and their associated macro- and micro-organisms) to the effects of these pollutants. Little is known about the direct effects of MPs and their organic additives on marine bacteria, e.g. in one of the most ecologically significant groups, the diazotrophs or N2-fixing bacteria. To fill this gap of knowledge, we exposed marine diazotrophs found in association with the endemic Mediterranean seagrass Posidonia oceanica to pure MPs which differ in physical properties (e.g. density, hydrophobicity and/or size), namely, polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) and polystyrene (PS) and to their most abundant associated organic additives (e.g. fluoranthene, 1,2,5,6,9,10-hexabromocyclododecane [HBCD] and dioctyl-phthalate [DEHP]). Growth, protein overexpression, direct physical interactions between MPs and bacteria, phosphorus (P) acquisition mechanisms and N2-fixation rates were evaluated. Our results show species-specific responses of the autotrophic and heterotrophic N2-fixing bacteria tested and the responses were dependent on the type and concentration of MPs and additives. N2-fixing cyanobacteria were positively affected by environmental and high concentrations of MPs (e.g. PVC), as opposed to heterotrophic strains, that were only positively affected with high concentrations of ∼120 µm-size MPs (detecting the overexpression of proteins related to plastic degradation and C-transport), and negatively affected by 1 µm-size PS beads. Generally, the organic additives (e.g. fluoranthene) had a deleterious effect in both autotrophic and heterotrophic N2-fixing bacteria and the magnitude of the effect is suggested to be dependent on bacterial size. We did not find evidences that specific N2-fixation rates were significantly affected by exposure to MPs, albeit changes in bacterial abundance can affect the bulk N2-fixation rates. In summary, we reported for the first time, the beneficial (the “good”), deleterious (the “bad”) and/or both (the “double-sword”) effects of exposure to MPs and their organic additives on diazotrophs found in association with seagrasses.

Sign in / Sign up

Export Citation Format

Share Document