Diatom Communities as Bioindicators of Human Disturbances on Suburban Soil Quality in Arid Marrakesh Area (Morocco)

Minaoui, Farah; Hakkoum, Zineb; Douma, Mountasser; Mouhri, Khadija; Loudiki, M.

doi:10.1007/s11270-021-05094-3

Cited by 8 publications

(5 citation statements)

References 87 publications

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“…We observed a relatively low diversity of diatoms in Mutnovsky and Gorely volcano soils in comparison with other types of soils [ 79 , 104 , 105 , 106 ]. This phenomenon could be explained by the very low density, high hydrophilicity, and high filtration capacity of volcanic soils.…”

Section: Discussionmentioning

confidence: 64%

Diatoms in Volcanic Soils of Mutnovsky and Gorely Volcanoes (Kamchatka Peninsula, Russia)

et al. 2021

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Volcanic activity has a great impact on terrestrial ecosystems, including soil algae in general and diatoms in particular. To understand the influence of volcanoes on the biodiversity of diatoms, it is necessary to explore the flora of these microorganisms in regions with high volcanic activity, which includes the Kamchatka peninsula. During the study on diatoms in the soils of Mutnovsky and Gorely volcanoes of Kamchatka, 38 taxa were found. The Mutnovsky volcano diatom flora was more diverse and accounted for 35 taxa. Eunotia curtagrunowii, Humidophila contenta, and Pinnularia borealis were the dominant species. In the Gorely volcano, only 9 species were identified, with Caloneis bacillum and Pinnularia borealis prevailing in the samples. Overall, the genera Pinnularia and Eunotia were the most diverse in the studied area. The diatom flora of the studied volcanoes comprises mostly cosmopolitan small-sized taxa with a wide range of ecological plasticity. Our data confirm the high adaptive potential of diatom algae and add new knowledge about the ecology and biogeography of this group of microorganisms.

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Section: Discussionmentioning

confidence: 64%

Diatoms in Volcanic Soils of Mutnovsky and Gorely Volcanoes (Kamchatka Peninsula, Russia)

et al. 2021

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“…The idea to use terrestrial diatoms as bioindicators is relatively new, and the criteria for assessment are not yet defined ( Antonelli et al, 2017 ; Barragán et al, 2018 ). However, this approach seems promising ( Wanner et al, 2020 ; Zhang et al, 2020 ; Minaoui et al, 2021 ). For example, a study in suburban soils around Marrakesh, Morocco, supported the idea of using diatoms for indication of high nutrient content, pH, and conductivity ( Minaoui et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

“…However, this approach seems promising ( Wanner et al, 2020 ; Zhang et al, 2020 ; Minaoui et al, 2021 ). For example, a study in suburban soils around Marrakesh, Morocco, supported the idea of using diatoms for indication of high nutrient content, pH, and conductivity ( Minaoui et al, 2021 ). Although our study showed different community patterns, possibly depending on the degree of human disturbance, there was no clear indicator species for low or high disturbance levels.…”

Section: Discussionmentioning

confidence: 99%

“…Consequently, terrestrial diatoms could serve as indicator species in soils, similarly to the freshwater-diatom biotic indices used extensively to assess water quality. Recent studies have proven the suitability of diatom species assemblages as bioindicators for human disturbances, heavy-metal contamination, and soil environmental assessment ( Wanner et al, 2020 ; Zhang et al, 2020 ; Minaoui et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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Ecophysiological performance of terrestrial diatoms isolated from biocrusts of coastal sand dunes

Glaser,

Kammann,

Plag

et al. 2023

Front. Microbiol.

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Terrestrial diatoms are widespread in a large variety of habitats and are regularly recorded in biocrusts. Although diatoms have long been known to live in terrestrial habitats, only a few studies have focused on their diversity of ecophysiology. Here we present a study on the ecophysiological performance of five terrestrial diatom cultures from biocrusts, which were collected in sand dunes of the German coast of the Baltic Sea. The sampling sites were selected along a gradient of human impacts on the dunes. The richness of diatom species, roughly estimated from permanent slides, was around 30 species per sampling site. The species abundance was calculated in the same way revealing a high proportion of broken diatom frustules. All diatom cultures established in the laboratory showed no photoinhibition and high oxygen production along a light gradient. The desiccation tolerance differed among the strains, with high recovery observed for Hantzschia abundans and Achnanthes coarctata and low to no recovery for Pinnularia borealis and Pinnularia intermedia. The maximum growth rate for most strains was between 25 and 30°C. These temperatures can be easily reached in their natural environments. Nevertheless, during short-term exposure to elevated temperatures, oxygen production was recorded up to 35°C. Interestingly, two of five diatom cultures (Hantzschia abundans and Pinnularia borealis) produced mycosporine-like amino acids. These UV-protective substances are known from marine diatoms but not previously reported in terrestrial diatoms.

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“…As diatomáceas compõem um grupo de microrganismos fotossintetizantes caracterizadas por apresentarem sílica como componente principal da parede celular e constituem um dos grupos mais representativo para a comunidade perifítica (ANNENKOV; SECKBACH; GORDON, 2021;KOCIOLEK et al, 2015;KOCIOLEK, 2011). Esses organismos são tradicionalmente utilizados como bioindicadores em ambientes aquáticos, principalmente devido a características como: alta diversidade, curto ciclo de vida, frústulas resistentes e sensibilidade ou tolerância às alterações ambientais (por exemplo, pH, salinidade, luz, nutrientes inorgânicos, poluição orgânica e por metais pesados) (LOBO, et al, 2016;MINAOUI et al, 2021;PARMAR;RAWTANI;AGRAWAL, 2016;SALMASO et al, 2019;STENGER-KOVÁCS, et al, 2013).…”

Section: Introductionunclassified

Biodiversidade De Diatomáceas Em Riachos Subtropicais Com Diferentes Níveis De Impacto Antrópico

Iatskiu¹,

NARDELLI²,

BARTOZEK³

et al. 2023

Anais Do II Congresso Brasileiro on-Line De Estudos Ecológicos

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Diatom Communities as Bioindicators of Human Disturbances on Suburban Soil Quality in Arid Marrakesh Area (Morocco)

Cited by 8 publications

References 87 publications

Diatoms in Volcanic Soils of Mutnovsky and Gorely Volcanoes (Kamchatka Peninsula, Russia)

Diatoms in Volcanic Soils of Mutnovsky and Gorely Volcanoes (Kamchatka Peninsula, Russia)

Ecophysiological performance of terrestrial diatoms isolated from biocrusts of coastal sand dunes

Biodiversidade De Diatomáceas Em Riachos Subtropicais Com Diferentes Níveis De Impacto Antrópico

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