Publications by authors named "Isabella Percopo"

Article Synopsis
  • The NEREA initiative focuses on creating an augmented observatory in the Gulf of Naples to improve our understanding of marine ecosystems through a comprehensive approach.
  • It combines traditional research methods with advanced techniques like metabarcoding and metagenomics, building on past expeditions and research sites.
  • In its first 10 months (April 2019 to January 2020), NEREA collected extensive data on physical and chemical parameters, plankton biodiversity, and genetics, resulting in significant insights into marine ecosystems.
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Article Synopsis
  • Researchers collected and studied Pseudo-nitzschia species from coastal waters of central Chile and nearby areas, identifying 123 strains across 11 species through genetic and structural analysis.
  • The study revealed significant genetic and structural diversity among the species, highlighting the presence of new and undescribed species, as well as morphological variants with unclear species boundaries.
  • Domoic acid, a harmful toxin, was found in 18 out of 82 tested strains, with varying levels of toxicity among different species, indicating a need for further monitoring and research in these waters.
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Heavy metals (HMs) can induce both chronic and acute harmful effects on marine and freshwater biota. The environmental impact of HMs in freshwater, seawater, soil, and wastewater can be limited using microbes, including microalgae, that are able to remove metals from environmental matrices. Indeed, they can passively adsorb and actively accumulate these persistent pollutants within their organelles, limiting their detrimental effects on cellular metabolism.

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The processes leading to the emergence of new species are poorly understood in marine plankton, where weak physical barriers and homogeneous environmental conditions limit spatial and ecological segregation. Here, we combine molecular and ecological information from a long-term time series and propose , a new cryptic planktonic diatom, as a possible case of speciation by temporal segregation. The new species differs in several genetic markers (18S, 28S and ITS rDNA fragments and L) from its closest relatives, which are morphologically very similar or identical, and is reproductively isolated from its sibling species .

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While the effects of industrial contamination in coastal areas may persist for years in benthos communities, plankton should not show permanent impairments because of their high spatial dynamics, fast turnover times and pronounced seasonality. To test this hypothesis, in 2019 we conducted five surveys in the Bay of Pozzuoli (Gulf of Naples, Mediterranean Sea), in front of a dismissed steel factory and in the adjacent inshore coastal waters. High seasonal variability was observed for bacteria, phytoplankton and mesozooplankton, whereas plankton spatial gradients were relatively smooth during each survey.

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Azadinium dexteroporum is the first species of the genus described from the Mediterranean Sea and it produces different azaspiracids (AZA). The aims of this work were to characterize the toxin profile of the species and gain structural information on azaspiracids produced by the A. dexteroporum strain SZN-B848 isolated from the Gulf of Naples.

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Seventy-five diatom strains isolated from the Beaufort Sea (Canadian Arctic) in the summer of 2009 were characterized by light and electron microscopy (SEM and TEM), as well as 18S and 28S rRNA gene sequencing. These strains group into 20 genotypes and 17 morphotypes and are affiliated with the genera Arcocellulus, Attheya, Chaetoceros, Cylindrotheca, Eucampia, Nitzschia, Porosira, Pseudo-nitzschia, Shionodiscus, Thalassiosira, and Synedropsis. Most of the species have a distribution confined to the northern/polar area.

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A new nontoxic Pseudo-nitzschia species belonging to the P. pseudodelicatissima complex, P. arctica, was isolated from different areas of the Arctic.

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A new photosynthetic planktonic marine dinoflagellate, Azadinium dexteroporum sp. nov., is described from the Gulf of Naples (South Tyrrhenian Sea, Mediterranean Sea).

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