Diversity and richness of marine fungi on two Portuguese marinas
Azevedo, Egidia; Rebelo, Rui; Caeiro, Maria F.; Barata, Margarida
Two marinas, Cascais and Sesimbra, located in the western Portuguese coast (East Atlantic) were selected for the exposure of 288 baits of Fagus sylvatica and Pinus pinaster to colonization by marine fungi. Twenty six taxa were identified: 14 (6 Ascomycota and 8 anamorphic fungi) by direct observation and 12 (7 Ascomycota, 1 Basidiomycota and 4 anamorphic fungi) after an incubation period of 12 months in moist chambers. The study of frequency of occurrence, diversity and similarity of the marine mycota was performed as well as of the pattern of succession. The Sesimbra marina less influenced by outflowing freshwater, presented the highest values for diversity indices (Richness, Shannon and Evenness). The Sorenson index for the marine mycota has a mean value for the environments and a high value for the substrata selected. Ten taxa are new records for Portugal: Lautisporopsis circumvestita, Lindra marinera, Pleospora gracilariae, Remispora quadriremis, Cirrenalia fusca, Fusarium sp., Graphium sp., Periconia prolifica, Stachybotrys sp. and Stemphylium gracilariae. Two taxa are new records for European seas: Pleospora gracilariae and Stemphylium gracilariae. East Atlantic mycota were compared with published data from coastal waters of Northeastern Atlantic Ocean, Mediterranean Sea and Pacific Ocean. Our results showed that East Atlantic Portuguese mycota communities are more similar to the mycota found in Mediterranean Sea and Pacific Ocean than to those found in the colder coastal waters of England.