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Distribution patterns of macrobenthic species in relation to organic enrichment within aquaculture earthen ponds |
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| Authors: | Carvalho Susana Barata Marisa Pereira Fábio Gaspar Miguel B Cancela da Fonseca Luís Pousão-Ferreira Pedro |
| Institution: | aInstituto Nacional de Investigação Agrária e das Pescas (INIAP/IPIMAR), Centro Regional de Investigação Pesqueira do Sul (CRIPSul), Av. 5 de Outubro, 8700-305 Olhão, Portugal bDCB-FCMA, Universidade do Algarve, Campus de Gambelas, 8005-139 Gambelas, Portugal cIMAR, Laboratório Marítimo da Guia, Estrada do Guincho, 2750-642 Cascais, Portugal |
| Abstract: | The relationship between organic enrichment and macrobenthic colonization patterns was investigated during an 8-month period in Diplodus sargus (white seabream) production ponds. A stratified sampling design was applied and each pond was divided into three zones: water entrance (WE); central (C); and automatic feeder zones (AF). Generally, the number of species and Shannon–Wiener diversity increased from the WE to the AF zone. Abundance did not present a clear trend. The recently developed marine biotic index (AMBI) was applied and showed to be sufficiently robust to discriminate, within a relatively small area, differences in macrobenthic communities due to organic enrichment. Nevertheless, caution is advised when applying this index or others based on ecological group’s assignment, as the classification of a certain area may differ when allocating a certain species to an unsuitable group. This is particularly evident when common species are involved. |
| Keywords: | Organic enrichment Aquaculture Macrobenthic communities Ecological groups AMBI |
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