Search results for "Marine algae"
showing 6 items of 6 documents
Assessing global range expansion in a cryptic species complex: insights from the red seaweed genus Asparagopsis (Florideophyceae)
2017
The mitochondrial genetic diversity, distribution and invasive potential of multiple cryptic operational taxonomic units (OTUs) of the red invasive seaweed Asparagopsis were assessed by studying introduced Mediterranean and Hawaiian populations. Invasive behavior of each Asparagopsis OTU was inferred from phylogeographic reconstructions, past historical demographic dynamics, recent range expansion assessments and future distributional predictions obtained from demographic models. Genealogical networks resolved Asparagopsis gametophytes and tetrasporophytes into four A. taxiformis and one A. armata cryptic OTUs. Falkenbergia isolates of A. taxiformis L3 were recovered for the first time in t…
Removal of Cypermethrin from Water by Using Fucus Spiralis Marine Alga
2019
Alpha-cypermethrin is a synthetic pyrethroid that was extensively used for insect control, since the early 1980s. However, it is known that its presence in the environment has toxic effects on humans and aquatic life forms. For this reason, it is commendable for it to be removed completely from the contaminated environment. In this study, we evaluated the adsorption capacity of a marine alga for the removal of cypermethrin from water. The adsorption experiments were performed based on the batch equilibrium technique. The samples containing the pesticide were analyzed using gas chromatography with an electron capture detector, after liquid-liquid extraction in hexane. The results obtained fr…
Modeling Macroalgal Forest Distribution at Mediterranean Scale: Present Status, Drivers of Changes and Insights for Conservation and Management
2020
Macroalgal forests are one of the most productive and valuable marine ecosystems, but yet strongly exposed to fragmentation and loss. Detailed large-scale information on their distribution is largely lacking, hindering conservation initiatives. In this study, a systematic effort to combine spatial data on Cystoseira C. Agardh canopies (Fucales, Phaeophyta) was carried out to develop a Habitat Suitability Model (HSM) at Mediterranean scale, providing critical tools to improve site prioritization for their management, restoration and protection. A georeferenced database on the occurrence of 20 Cystoseira species was produced collecting all the available information from published and grey lit…
Influence of hydrothermal vents on phytobenthic communities in the Aeolian Islands (Tyrrhenian Sea): preliminary results
2010
The seaweeds Fucus vesiculosus and Ascophyllum nodosum are significant contributors to coastal iodine emissions
2013
Based on the results of a pilot study in 2007, which found high mixing ratios of molecular iodine (I2) above the intertidal macroalgae (seaweed) beds at Mweenish Bay (Ireland), we extended the study to nine different locations in the vicinity of Mace Head Atmospheric Research Station on the west coast of Ireland during a field campaign in 2009. The mean values of I2 mixing ratio found above the macroalgae beds at nine different locations ranged from 104 to 393 ppt, implying a high source strength of I2. Such mixing ratios are sufficient to result in photochemically driven coastal new-particle formation events. Mixing ratios above the Ascophyllum nodosum and Fucus vesiculosus beds increased …
Zastosowanie badań biomonitoringowych do oceny zanieczyszczenia metalami ciężkimi wybranych ekosystemów
2016
Celem przeprowadzonych badań był biomonitoring zanieczyszczenia wybranymi metalami ciężkimi: Mn, Fe, Cu, Zn, Cd, Ni i Pb terenu w pobliżu zbiornika Janów (woj. świętokrzyskie) oraz wody w niecce zbiornika. Metale ciężkie w matrycach środowiskowych, takich jak glony Palmaria palmata, mchy Pleurozium schreberi i gleba, oznaczano metodą absorpcyjnej spektrometrii atomowej. Na podstawie przeprowadzonych badań i wyznaczonych współczynników akumulacji względnej (RAF) dla eksponowanych próbek glonów wykazano niejednorodne zanieczyszczenie wód zbiornika, szczególnie miedzią i kadmem. Wartości RAF dla tych metali wynosiły odpowiednio od 0,08 do 0,51 i od 0,17 do 0,91. W nielicznych miejscach pomiaro…