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Modern diatom assemblages as tools for paleoenvironmental reconstruction: a case study from estuarine intertidal zones in southern Iberia
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Resumo(s)
Diatoms are unicellular algae that live in saline, brackish and freshwater environments, either floating in the water
column or associated with various substrates (e.g., muddy and sandy sediments). Diatoms are sensitive to changes
in environmental variables such as salinity, sediment texture, nutrient availability, light and temperature. This characteristic,
along with their short lifespan, allows diatoms to quickly respond to environmental changes. Since the
beginning of the 20th century, diatoms have been widely used to study the Holocene evolution of estuaries worldwide,
particularly to reconstruct ecological responses to sea-level and climate changes. However, diatoms have
been poorly studied in estuarine intertidal zones, due to the complexity of these environments, which have both
fluvial and marine influences.