Ecological Role of Viruses in Aquatic Ecosystems

2010 ◽  
Author(s):  
Ian Hewson ◽  
Cheryl Chow ◽  
Jed A Fuhrman
Keyword(s):  
Aquatic Ecosystems ◽  
Ecological Role

scholarly journals Not all viruses in nature are human enemies: a perspective on aquatic virus ecology in Brazil

2020 ◽  
Vol 32 ◽  
Author(s):  
Pedro Ciarlini Junger ◽  
Rafael Marques Almeida ◽  
Raquel Mendonça ◽  
Vinicius Fortes Farjalla ◽  
Rossana Correa Netto de Melo ◽  
...  
Keyword(s):  
Ecosystem Functioning ◽  
Aquatic Ecosystems ◽  
Physical Contact ◽  
Special Focus ◽  
Ecological Role ◽  
Health Crisis ◽  
Virus Ecology ◽  
Vector Borne ◽  
Water Borne

Abstract: Viruses cause various diseases in humans through vector-borne (e.g., Zika and dengue fever), airborne (e.g., measles) and water-borne (e.g., hepatitis) transmission, as well as direct physical contact (e.g., AIDS and herpes). Recently, the new coronavirus (SARS-CoV-2) pandemic has triggered the greatest global health crisis in a century. However, not all viruses in nature are human enemies. A vast body of literature indicates that viral infection is vital for ecosystem functioning by affecting nutrient cycling, controlling species growth and enhancing biodiversity. Here we provide a perspective on the ecological role of viruses in nature, with special focus on Brazilian aquatic ecosystems.

scholarly journals Taxonomical and functional diversity of Saprolegniales in Anzali lagoon, Iran

2019 ◽  
Author(s):  
Hossein Masigol ◽  
Seyed Akbar Khodaparast ◽  
Reza Mostowfizadeh-Ghalamfarsa ◽  
Keilor Rojas-Jimenez ◽  
Jason Nicholas Woodhouse ◽  
...  
Keyword(s):  
Carbon Cycling ◽  
Functional Diversity ◽  
Aquatic Ecosystems ◽  
Ecological Niche ◽  
Freshwater Ecosystems ◽  
Ecological Role ◽  
Assay Methods ◽  
Gilan Province ◽  
Anzali Lagoon

AbstractStudies on the diversity, distribution and ecological role of Saprolegniales (Oomycota) in freshwater ecosystems are currently receiving attention due to a greater understanding of their role in carbon cycling in various aquatic ecosystems. In this study, we characterized several Saprolegniales species isolated from Anzali lagoon, Gilan province, Iran, using morphological and molecular methods. Four species of Saprolegnia were identified, including S. anisospora and S. diclina as first reports for Iran. Evaluation of the ligno-, cellulo- and chitinolytic activities were also measured using plate assay methods. Most of the Saprolegniales isolates were obtained in autumn and nearly 50% of the strains showed chitinolytic and cellulolytic activities. However, only a few Saprolegniales strains showed lignolytic activities. This study has important implications for better understanding the ecological niche of oomycetes, and to differentiate them from morphologically similar but functional different aquatic fungi in freshwater ecosystems.

Ecological Role of Exopolysaccharides of Bacillariophyta: A Review

2017 ◽  
Vol 19 (1) ◽  
pp. 5-24 ◽  
Author(s):  
E. I. Shnyukova ◽  
E. K. Zolotareva
Keyword(s):  
Ecological Role

An inter-dependence of flood and drought: disentangling amphibian beta diversity in seasonal floodplains

2017 ◽  
Vol 68 (11) ◽  
pp. 2115 ◽  
Author(s):  
Leonardo F. B. Moreira ◽  
Tainá F. Dorado-Rodrigues ◽  
Vanda L. Ferreira ◽  
Christine Strüssmann
Keyword(s):  
Community Structure ◽  
Environmental Factors ◽  
Quantitative Data ◽  
Explanatory Variable ◽  
Biotic Interactions ◽  
Ecological Role ◽  
Β Diversity ◽  
Amphibian Community ◽  
Dry Seasons

Species composition in floodplains is often affected by different structuring factors. Although floods play a key ecological role, habitat selection in the dry periods may blur patterns of biodiversity distribution. Here, we employed a partitioning framework to investigate the contribution of turnover and nestedness to β-diversity patterns in non-arboreal amphibians from southern Pantanal ecoregion. We investigated whether components of β-diversity change by spatial and environmental factors. We sampled grasslands and dense arboreal savannas distributed in 12 sampling sites across rainy and dry seasons, and analysed species dissimilarities using quantitative data. In the savannas, both turnover and nestedness contributed similarly to β diversity. However, we found that β diversity is driven essentially by turnover, in the grasslands. In the rainy season, balanced variation in abundance was more related to altitude and factors that induce spatial patterns, whereas dissimilarities were not related to any explanatory variable during dry season. In the Pantanal ecoregion, amphibian assemblages are influenced by a variety of seasonal constraints on terrestrial movements and biotic interactions. Our findings highlighted the role of guild-specific patterns and indicated that mass effects are important mechanisms creating amphibian community structure in the Pantanal.

Erratum: FeAs2 biomineralization on encrusted bacteria in hot springs: an ecological role of symbiotic bacteria

2004 ◽  
Vol 41 (4) ◽  
pp. 481
Author(s):  
Kazue Tazaki ◽  
Islam ABM Rafiqul ◽  
Kaori Nagai ◽  
Takayuki Kurihara
Keyword(s):  
Hot Springs ◽  
Symbiotic Bacteria ◽  
Ecological Role
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