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Sahadevan Seena
University of Coimbra
EcologyHyphomycetesPlant litterBotanyBiology
57Publications
16H-index
831Citations
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Publications 57
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#1Sahadevan Seena (UC: University of Coimbra)H-Index: 16
Last. Julien Cornut (SUPSI)H-Index: 1
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Abstract Although considerable intraspecific trait variation is common, research dedicated to ecosystem functioning has focused mainly on species diversity. Organic matter breakdown, a key ecosystem-level process in woodland streams is mainly driven by aquatic hyphomycetes. These aquatic fungal decomposers constitute a critical link between plant litter and invertebrate detritivores in detritus-based food webs in streams. In this study, we evaluated the functional variability across a set of ten...
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#1Sahadevan Seena (UC: University of Coimbra)H-Index: 16
#2Olímpia Sobral (UC: University of Coimbra)H-Index: 6
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Abstract Metal contamination of watersheds is a global problem. Here, we conducted litter decomposition studies with Neonectria lugdunensis, a cosmopolitan aquatic fungus. Fungal isolates from four references (non-impacted) and six metal-contaminated streams (due to mine drainage) were exposed to mine drainage and reference stream waters in Central Portugal. Impact of mine drainage waters on N. lugdunensis hyphae was investigated by performing metabolomic profiling of 200 lipids and 25 amino aci...
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In the past few decades, the use of nano-based products has been expanding, subsequently increasing the risk of aquatic contamination by nanoparticles (NPs). Consequently, it is important to assess the potential risks of environmentally realistic concentrations of NPs. Leaf litter decomposition, a fundamental ecological process in headwater streams, is governed mainly by fungi. In this study, copper oxide nanoparticles (CuO NPs) were synthesised, and the influence of short term exposure to low c...
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#1Sofia Alexandra Ferreira Duarte (University of Minho)H-Index: 18
#2Bruno Antunes (University of Minho)
Last. Cláudia Pascoal (University of Minho)H-Index: 28
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Abstract Fungi play an important role in organic matter turnover and ensure key ecosystem services in freshwaters. The relationships between intraspecific fungal diversity and key ecological processes remain largely unknown. We examined the effects of intraspecific diversity of Articulospora tetracladia, a cosmopolitan fungal decomposer thriving on plant detritus in streams. Alder leaves were inoculated with 1 or mixtures of 2–8 fungal strains for 35 d, and leaf litter decomposition and fungal r...
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#1Sahadevan Seena (UC: University of Coimbra)H-Index: 16
#2Diana Graça (UC: University of Coimbra)
Last. Julien Cornut (SUPSI)H-Index: 1
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Abstract Nanosized plastics are an emerging concern in freshwater ecosystems, raising the question whether they put freshwater ecological processes at risk. Litter decomposition is a major ecological function in forested streams which is mainly driven by aquatic hyphomycetes. Here we investigated whether increasing concentrations (up to 102.4 mg/L) of nanosized polystyrene plastics (NPPs; 100nm) affect litter decomposition by five widely distributed species of aquatic hyphomycetes. Results showe...
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#1Srinath Murali (UC: University of Coimbra)H-Index: 1
#2Santosh Kumar (Konkuk University)H-Index: 14
Last. Abilio J. F. N. Sobral (UC: University of Coimbra)H-Index: 19
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Chitosan exhibits a wide range of bio-properties, including biocompatibility, antimicrobial activity, and biodegradability. In this study, we prepared bionanocomposites by using chitosan/gelatin with different concentrations of silver-loaded zinc oxide nanoparticles. The silver-loaded ZnO nanoparticles were synthesized using the sol–gel method with a gelatin template. The bionanocomposite films were prepared via green chemistry approach, using a solution casting method. The bionanocomposites wer...
3 CitationsSource
#1Sahadevan Seena (UC: University of Coimbra)H-Index: 16
#2Felix Bfirlocher (MtA: Mount Allison University)H-Index: 43
Last. Manuel A. S. Graça (UC: University of Coimbra)H-Index: 39
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Abstract Global patterns of biodiversity have emerged for soil microorganisms, plants and animals, and the extraordinary significance of microbial functions in ecosystems is also well established. Virtually unknown, however, are large-scale patterns of microbial diversity in freshwaters, although these aquatic ecosystems are hotspots of biodiversity and biogeochemical processes. Here we report on the first large-scale study of biodiversity of leaf-litter fungi in streams along a latitudinal grad...
1 CitationsSource
#1Sahadevan SeenaH-Index: 16
Last. Fernanda CássioH-Index: 29
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#1Aishwarya Jain (UC: University of Coimbra)H-Index: 1
#2Santosh Kumar (UC: University of Coimbra)H-Index: 14
Last. Sahadevan Seena (UC: University of Coimbra)H-Index: 16
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Abstract Nanoparticles (NPs) continue to be extensively produced by many industries, which ultimately leads to its release into the aquatic environment. It is crucial to estimate the impact of low concentrations of NPs which are environmentally relevant. Litter decomposition is a key ecological process in forested streams; microbes like fungi and bacteria are recognised to play a vital role in litter decomposition. In this study, zinc oxide (ZnO), titanium dioxide (TiO2), silver loaded ZnO (Ag/Z...
2 CitationsSource
#1Sahadevan Seena (UC: University of Coimbra)H-Index: 16
#2Ludmila Marvanová (Masaryk University)H-Index: 16
Last. Felix Bfirlocher (MtA: Mount Allison University)H-Index: 43
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Abstract The taxonomy of the aquatic hyphomycete genus Articulospora ( Ascomycota, Pezizomycotima, Leotiales, Helotiaceae ) is based on the morphology of the generative phase of its lifecycle. The type species is Articulospora tetracladia , which is distributed worldwide. Its most frequent populations in nature have dimorphic conidia, differing by the extent of conidial branching (i.e., one or two levels of branching). Some strains, stable in culture, produce exclusively conidia of one type. Wit...
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