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<p>Establishment and spread of non-indigenous species (NIS) worldwide intensified in the last decades. When it comes to non-indigenous marine species, the problem is even more unnoticed, as it has historically been less studied than terrestrial invasions. Mollusks are among the main non-indigenous marine species dispersed globally. <i>Perna viridis</i>, considered a successful invader, is a Western Indo-Pacific mussel that has been introduced to Brazilian shores. First detected in 2018 in Rio de Janeiro, <i>P. viridis</i> has now spread to the states of São Paulo, Paraná and Santa Catarina. This study aimed to comprehend the distribution of <i>P. viridis</i> in Ubatuba, São Paulo state, Brazil, and was conducted following the first detection of the species in the municipality. Owing to citizen scientists and their reports on <i>P. viridis</i> sightings, it was possible to define priority study areas. The active search for <i>P. viridis</i> combined motorboat and snorkeling surveys, including sightings, photographs and sampling. Eight new sites were recorded where the green mussel is encrusted: three in Baía do Itaguá, one near Praia do Lázaro, one in Praia Vermelha, one in Praia Almada and two in Ilha Anchieta; the latter based on a citizen scientist report. Artificial substrates (i.e., vessels, buoy, ropes and mussel farm infrastructure) appear to be the main areas of current <i>P. viridis</i> occurrences. However, in the southern islet of Ilha Anchieta, the mussel was found on rocky shores. It is crucial to continue monitoring the spread range of <i>P. viridis</i>, involving citizen science, while also planning effective strategies to contain its expansion and reduce impacts.</p>

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Eyes on the Coast: How Citizen Science Helps Map the Invasion of Perna viridis (Bivalvia, Mytilidae) in Ubatuba, SE Brazil

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Giulia Vaz De Donno,
  • Marcos Akira-Umeno,
  • Mariana Pace Camargo,
  • Carlos Eduardo Malavasi Bruno,
  • Bruno Pereira Masi,
  • Alexandre R. da Silva

摘要

Establishment and spread of non-indigenous species (NIS) worldwide intensified in the last decades. When it comes to non-indigenous marine species, the problem is even more unnoticed, as it has historically been less studied than terrestrial invasions. Mollusks are among the main non-indigenous marine species dispersed globally. Perna viridis, considered a successful invader, is a Western Indo-Pacific mussel that has been introduced to Brazilian shores. First detected in 2018 in Rio de Janeiro, P. viridis has now spread to the states of São Paulo, Paraná and Santa Catarina. This study aimed to comprehend the distribution of P. viridis in Ubatuba, São Paulo state, Brazil, and was conducted following the first detection of the species in the municipality. Owing to citizen scientists and their reports on P. viridis sightings, it was possible to define priority study areas. The active search for P. viridis combined motorboat and snorkeling surveys, including sightings, photographs and sampling. Eight new sites were recorded where the green mussel is encrusted: three in Baía do Itaguá, one near Praia do Lázaro, one in Praia Vermelha, one in Praia Almada and two in Ilha Anchieta; the latter based on a citizen scientist report. Artificial substrates (i.e., vessels, buoy, ropes and mussel farm infrastructure) appear to be the main areas of current P. viridis occurrences. However, in the southern islet of Ilha Anchieta, the mussel was found on rocky shores. It is crucial to continue monitoring the spread range of P. viridis, involving citizen science, while also planning effective strategies to contain its expansion and reduce impacts.