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Atlantorchestoidea brasiliensis (Crustacea: Amphipoda) as an indicator of disturbance caused by urbanization of a beach ecosystem

Abstracts

This study analyzed a comparison of the Atlantorchestoidea brasiliensis (Crustacea: Amphipoda) density of a preserved area with that of an urbanized one, both on Peró Beach, Cabo Frio, Rio de Janeiro state. Seasonal samplings were conducted of the population of talitrideos and an estimation of the number of swimmers in these areas was made. The lowest frequency of swimmers was recorded in the preserved area regardless of sampling period. In the urbanized area swimmers were most frequent in January (550 individuals/m-1). The statistical tests showed the absence of Atlantorchestoidea brasiliensis in the urban area, indicating that this species is extremely sensitive to the urbanization of beaches. The use of the Talitridae family as an indicator of the impact of urbanization on the ecosystems of sandy beaches is also discussed.

Atlantorchestoidea brasiliensis; sandy beach; urbanization


Este trabalho é um estudo comparativo da densidade de Atlantorchestoidea brasiliensis (Crustacea: Amphipoda) no trecho urbanizado e no trecho preservado da praia do Peró, Cabo Frio, Rio de Janeiro. Foram realizadas coletas sazonais da população de talitrídeos, assim como uma estimativa do número de banhistas nessas áreas. Na área preservada foi registrada a menor freqüência de banhista independente dos períodos amostrados, enquanto que no trecho urbanizado a maior freqüência ocorreu no mês de Janeiro (550 indivíduos/m-1). As análises estatísticas mostraram a ausência de Atlantorchestoidea brasiliensis na área urbanizada em todos os períodos amostrados, indicando que essa espécie é bastante sensível à urbanização das praias. É discutida também a utilização da família Talitridae como indicadora de impactos oriundos dos efeitos de urbanização nos ecossistemas de praias arenosas.

Atlantorchestoidea brasiliensis; praia arenosa; urbanização


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Publication Dates

  • Publication in this collection
    30 Apr 2010
  • Date of issue
    Mar 2010

History

  • Reviewed
    26 Mar 2009
  • Received
    09 Dec 2008
  • Accepted
    04 Sept 2009
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