Percorrer por autor "IIarri, M."
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- Biodiversity associated to a floating wetland island in a freshwater pondPublication . Calheiros, C. S. C.; IIarri, M.; Godinho, M.; Castro, P. M. L.; Pereira, S. I. A.Floating wetland islands (FWI) are considered nature-based solutions that can be applied in different water bodies, such as lakes and rivers, in order to deliver a wide range of ecosystem services. They are recognized to promote local biodiversity, aesthetic integration and provide water quality enhancement through phytoremediation processes, although research is still needed to go deeper on the processes underlying the performance of these systems. The aim of this study was to assess de biodiversity associated to a FWI made of cork agglomerate, set up in 2018 in a freshwater pond. A polyculture comprising the plant species Iris germanica, Acorus gramineus, Caltha palustris, and Typha latifolia was considered. The culturable bacterial communities associated to the floating platform biofilm and to the plant rhizosphere were analyzed. The bacterial isolates were identified by 16S rRNA and characterized for their ability to produce plant growth promoting substances (e.g., indole-acetic acid, siderophores). The diversity of macroinvertebrates associated to FWI was also assessed. Water analysis of the pond were conducted. Preliminary data shows that there is a high bacterial diversity associated to this system and the ability to produce plant growth promoting substances has been shown. The bacterial strains with outstanding growth promoting traits can be used in the future to support phytoremediation strategies or plant resilience to climate change abiotic stresses. Regarding the biodiversity of macroinvertebrates associated with FWI they were mainly from the order Odonata. The FWI attracted mainly individuals of the genus Coenagrion (represented more than 80% of the fauna). These systems had proven to be a hotspot of biodiversity supporting water management plans and landscape and aesthetics integration. This study gives new insights into broadening the FWI applications in freshwater or polluted water.
- Floating wetland islands to support biodiversity promotion in a freshwater pondPublication . Calheiros, C. S. C.; IIarri, M.; Castro, P. M. L.; Pereira, S. I. A.
- Phytotechnology implementation in marine and freshwater environments: case study of floating wetlandsPublication . Octaviano, Ana L.; Nawaz, N.; Pereira, S.; IIarri, M.; Magalhães, J.; Calheiros, C.Phytotechnologies are plant-based approaches that solve or complement the solution of environmental problems, by remediating soil, water, and air or restoring ecosystem services in managed landscapes. Floating treatment wetlands (FWIs) are examples of a phytotechnology, also named nature-based solution, that provides water treatment and management with low capital costs, high success rate, low maintenance requirement, and aesthetic nature when compared to conventional solutions. They also promote biodiversity and ecosystem establishment, enabling creation of habitat, nursery spot or as stepping stone. FWIs comprise a floating platform, colonized by selected plants and an anchoring system. The selection of the plant species is very important for the success of a full coverage system and also to assure a full development of a rooting system for phytoremediation purposes. In the present study 4 FWIs were implemented (with different floating materials: 2 of cork and 2 of hand-assembled recycled material), in order to compare the performance and their establishment in two environments: saline and freshwater. The saline environment was associated to a port marina and the freshwater environment to a pond. Selected plant species were considered for each environment. Monitoring of the system is being carried out along time concerning the associated biodiversity, plant establishment and floatability evaluation of the floating platforms. Based on the analysis of these results, this work hopes that these nature-based solutions can contribute to better water management, in order to involve the conservation and rehabilitation of natural ecosystems.
- Phytotechnology implementation in marine and freshwater environments: case study of floating wetlandsPublication . Octaviano, A. L.; Nawaz, N.; Magalhães, J.; Pereira, S.; IIarri, M.; Gomes, C. R.; Imbernon, R.; Calheiros, C.Environmental biotechnology, such as bioremediation and phytoremediation, is a promising field that uses natural resources, including microorganisms and plants, to eliminate toxic organic contaminants from water, soils and air (Calheiros et al. 2020). This technology offers an attractive alternative to other conventional remediation processes due to its relatively low cost and environmentally friendly method. In this project, we used floating treatment wetland (FTW), an effective and sustainable technology for wastewater treatment. This method has been widely adopted for the treatment of various types of polluted waters, including agricultural runoff, stormwater, and industrial effluents. In FTWs, plants are vegetated on a floating mat while their roots are extended into contaminated water, acting as biological filters. Nutrients and potentially toxic metals/elements are absorbed from wastewater by plants through their roots, while organic matter is degraded by microorganisms forming biofilms on the roots and on the surface of the mat (Shahid et al. 2018). Thereby, in the present study it was implemented 4 FTW prototypes, of different materials and in different environments (marine and freshwater) to compare their efficiency and establishment on site.