The taxonomical and functional diversity of three groups of aquatic insects in rheocrene karst springs are affected by different environmental factors

Limnologica ◽  
2021 ◽  
pp. 125913
Author(s):  
Jakub Cíbik ◽  
Pavel Beracko ◽  
Iľja Krno ◽  
Tomáš Lánczos ◽  
Tomáš Navara ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Functional Diversity ◽  
Aquatic Insects ◽  
Karst Springs

scholarly journals Effects of environmental factors on the functional diversity of crustacean zooplankton community

2021 ◽  
Vol 33 (4) ◽  
pp. 1220-1229
Author(s):  
Wang Songbo ◽  
◽  
Shi Zhaojin ◽  
Geng Hong ◽  
Wu Laiyan ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Functional Diversity ◽  
Zooplankton Community ◽  
Crustacean Zooplankton

scholarly journals Functional diversity of microorganisms in metal- and alkali-contaminated soils of Central and North-eastern Slovakia

2019 ◽  
Vol 14 (No. 1) ◽  
pp. 32-39 ◽  
Author(s):  
Juraj Fazekaš ◽  
Danica Fazekašová ◽  
Peter Adamišin ◽  
Petra Huličová ◽  
Eva Benková
Keyword(s):  
Environmental Factors ◽  
Functional Diversity ◽  
Contaminated Soils ◽  
Iron Ore ◽  
Shannon Index ◽  
Permissible Limit ◽  
Soil Reaction ◽  
North Eastern ◽  
Long Time ◽  
Tailings Impoundments

A field-based study and laboratory tests were undertaken to determine the functional diversity of microorganisms in metal- and alkali-contaminated soils in Central and North-eastern Slovakia where iron ore and magnesite have been mined and processed for a long time. To improve the understanding of the functional diversity of microorganisms, we examined the effects of environmental factors on the functional diversity of microorganisms in metal- and alkali-contaminated soils in the emission field of heaps and tailings impoundments of iron ore mines (Central Spiš) and magnesite factories (Jelšava and Lubeník). Biolog<sup>®</sup> Eco Plates were used to determine and assess metabolic profiles of microbial communities. The examined area of Central Spiš showed extremely high values of Hg and Cu and the values of Zn, Cd, Pb and Cr exceeding the permissible limit were determined. Soil reaction was extremely acidic to strongly acidic. The Jelšava and Lubeník area was characterized by alkaline contamination and the soil reaction was slightly acidic to strongly alkaline. The values of Cr, Mn, and Mg exceeding the permissible limit were measured there. The results indicate harmful and even toxic contamination. Our results showed that the diversity of microorganisms was different in the investigated areas and it was significantly influenced by environmental factors such as soil reaction, bulk density, porosity, and heavy metals Hg, Pb, Cr, Zn, Cu, Mn and Mg. Based on the results of the Shannon index, we can conclude that the diversity was low to moderate (2.5–3.3) and medium (3.3–4.0). Correlations between functional diversity of microorganisms and soil reaction, Hg, Cr, and Cu were determined. Our findings are decisive for understanding the microbial diversity in metal- and alkali-contaminated soils and they can be used to assess the quality and health of soil, as well as for scientific applications of remediation techniques.  

scholarly journals Effects of environmental factors on community structure of Leptophlebiidae (Insecta, Ephemeroptera) in Cerrado streams, Brazil

2013 ◽  
Vol 103 (3) ◽  
pp. 260-265 ◽  
Author(s):  
Leandro S. Brasil ◽  
Yulie Shimano ◽  
Joana Darc Batista ◽  
Helena S. R. Cabette
Keyword(s):  
Species Richness ◽  
Environmental Factors ◽  
Aquatic Insects ◽  
Riparian Vegetation ◽  
Functional Group ◽  
Functional Feeding Groups ◽  
Brazilian Cerrado ◽  
Positive Effects ◽  
Sampling Points ◽  
History Of

We analyzed the effects of environmental factors on abundance, species richness, and functional group richness of Leptophlebiidae in 16 sampling points along four Cerrado streams. Across three periods of 2005, we collected 5,492 larvae from 14 species in stream bed substrate. These species belong to three functional feeding groups: scrapers, filtering collectors and shredders. The abundance and species richness were not affected by water quality, but habitat quality related to presence of riparian vegetation had positive effects on the abundance of shredders. Our results add important information on the natural history of the species and functional groups of aquatic insects and also provide relevant data for the monitoring and conservation of streams in the Brazilian Cerrado.

Environmental factors driving phytoplankton taxonomic and functional diversity in Amazonian floodplain lakes

Hydrobiologia ◽  
2017 ◽  
Vol 802 (1) ◽  
pp. 115-130 ◽  
Author(s):  
Simone J. Cardoso ◽  
João Carlos Nabout ◽  
Vinicius F. Farjalla ◽  
Paloma M. Lopes ◽  
Reinaldo L. Bozelli ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Functional Diversity ◽  
Floodplain Lakes

scholarly journals How fish traits and functional diversity respond to environmental changes and species invasion in the largest river in Southeastern China

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11824
Author(s):  
Li Lin ◽  
Weide Deng ◽  
Xiaoxia Huang ◽  
Yang Liu ◽  
Liangliang Huang ◽  
...  
Keyword(s):  
Community Structure ◽  
Environmental Factors ◽  
Freshwater Fish ◽  
Functional Diversity ◽  
Community Assembly ◽  
Fish Community ◽  
Fish Community Structure ◽  
Species Invasion ◽  
Southeastern China ◽  
Functional Richness

Background Freshwater fish populations are facing multiple stressors, including climate change, species invasion, and anthropogenic interference. Temporal studies of fish functional diversity and community assembly rules based on trait-environment relationships provide insights into fish community structure in riverine ecosystems. Methods Fish samples were collected in 2015 in the Min River, the largest freshwater riverine system in Southeastern China. Fish functional diversity was compared with the background investigation in 1979. Changes in functional richness, functional evenness, functional divergence, and functional beta diversity were analyzed. Relationships between functional diversity and environmental factors were modeled by random forest regression. Correlations between fish functional traits and environmental factors were detected by fourth-corner combined with RLQ analysis. Results Functional richness was significantly reduced in 2015 compared with 1979. Functional beta diversity in 2015 was significantly higher than that in 1979, with functional nestedness being the driving component. Reduction of functional richness and domination of functional nestedness is associated with species loss. Trait convergence was the dominant mechanism driving the temporal changes of functional diversity. Precipitation, temperature, species invasion, and human population were the most significant factors driving fish functional diversity. Higher precipitation, higher temperature, and presence of invasive species were significantly associated with higher swimming factor and higher relative eye diameter, while the opposite environmental conditions were significantly associated with higher pectoral fin length and eurytopic water flow preference. Conclusions Environmental filtering is the dominant temporal assembly mechanism shaping fish community structure. This work contributes to the understanding of temporal freshwater fish community assembly and the associations between fish functional structure and local environmental conditions, which will be informative for future freshwater fish conservation.

scholarly journals A decrease in taxonomic and functional diversity of dung beetles impacts the ecosystem function of manure removal in altered subtropical habitats

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0244783
Author(s):  
Rodrigo Sarmiento-Garcés ◽  
Malva Isabel Medina Hernández
Keyword(s):  
Environmental Factors ◽  
Functional Groups ◽  
Functional Diversity ◽  
Removal Rate ◽  
Significant Loss ◽  
Dung Beetles ◽  
Habitat Destruction ◽  
Ecosystem Functions ◽  
Functional Richness ◽  
Soil Temperatures

The loss of biodiversity—caused mainly by habitat destruction—is one of the environmental problems with major repercussions on ecosystem functioning. Nevertheless, our understanding of the functional consequences of habitat changes on the communities and ecosystems remains limited to a small number of case studies. We evaluated the change in taxonomic and functional diversity of copro-necrophagous beetles (Scarabaeinae) and their relationship with the varying environmental factors present in four habitats with different degrees of disturbance. Furthermore, we evaluated how changes in taxonomic and functional diversity affect the rates of excrement removal. The collections were carried out at four locations in the state of Santa Catarina, Southern Brazil, on natural systems with different degrees of disturbances (forests in advanced and initial succession) and agroecosystems (silviculture and pastures dedicated to livestock). We collected a total of 1266 dung beetles distributed in 35 species and classified into 11 functional groups. The taxonomic and functional diversity analyses showed that habitats that still maintain an arboreal stratum do not present differences between them, in contrast to habitats dedicated to livestock where there was a significant loss of species and functional groups. The distance between the trees, as well as the air and soil temperatures were determining factors in the selection of species and functional groups. Some of these environmental factors explain the differences in functional traits, represented as varying abundances of the species found. The rates of manure removal from the ecosystem were positively correlated to taxonomic and functional richness as well as biomass of beetles. Thus, we can conclude that habitats with tree strata have the capacity to preserve a larger proportion of the regional set of species as well as the important ones, while preserving the taxonomic and functional diversity and the ecosystem functions, such as the excrement removal rate.

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