Abstract
Introduction In recent decades, there has been an intensification of environmental problems, which are becoming increasingly critical and frequent due to population growth. Microorganisms, including soilborne fungi, play an essential role in maintaining and balancing the environment. One of the most impacted ecosystems in São Luís, Maranhão, Brazil, is the Jansen Lagoon State Park, an important tourist spot, which has suffered anthropogenic actions such as the dumping of household waste (sewage) in its body of water. As a consequence, these pollutants can accumulate in the adjacent soil, since the body of water is near this substrate. The objectives were to isolate and identify filamentous fungi from the soil of the Jansen Lagoon State Park. Methods Monthly soil samples were collected and later processed using the modified suspension technique according to Clark (1965). Results The isolated genera were Aspergillus, Penicillium, Trichoderma, Absidia, and Fusarium. Aspergillus is the fungal genus of greater dominance in the soil of the Jansen Lagoon State Park. Aspergillus niger was the dominant species (37%), followed by A. tamarii (21.6%). Conclusion The main isolated fungi from the Jansen Lagoon State Park were Aspergillus niger and Aspergillus tamrii. These fungi can be used as biological markers of pollution and as biodegraders and/or bioremediators to improve the area studied.
Highlights
In recent decades, there has been an intensification of environmental problems, which are becoming increasingly critical and frequent due to population growth
Regarding fungi collection and identification, our results showed that Aspergillus niger was the dominant species (37%), followed by A. tamarii (21.6%), Penicillium citrinum (10%), Aspergillus flavus (8.7%), and Trichoderma koningii (7.7%)
In a Brazilian Cerrado region, located in Mato Grosso, Garcia et al found that Penicillium and Aspergillus were amongst the dominant fungal genera isolated, with percentages of 28% and 5%, respectively, which was reasonable since both the areas studied in this research and in our work are characterized by having a tropical climate with two distinct seasons: a dry and a wet season [24]
Summary
There has been an intensification of environmental problems, which are becoming increasingly critical and frequent due to population growth. One of the most impacted ecosystems in São Luıs, Maranhão, Brazil, is the Jansen Lagoon State Park, an important tourist spot, which has suffered anthropogenic actions such as the dumping of household waste (sewage) in its body of water. As a consequence, these pollutants can accumulate in the adjacent soil, since the body of water is near this substrate. E objectives were to isolate and identify filamentous fungi from the soil of the Jansen Lagoon State Park. E main isolated fungi from the Jansen Lagoon State Park were Aspergillus niger and Aspergillus tamrii Conclusion. e main isolated fungi from the Jansen Lagoon State Park were Aspergillus niger and Aspergillus tamrii
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