Does the Rhine Still have Characteristics of a River Ecosystem? The Longitudinal Distribution of Macroinvertebrates

1994 ◽  
Vol 29 (3) ◽  
pp. 1-8 ◽  
Author(s):  
G. van der Velde ◽  
F. W. B. van den Brink
Keyword(s):  
Habitat Characteristics ◽  
Longitudinal Distribution ◽  
Functional Feeding Groups ◽  
River Rhine ◽  
River Ecosystem ◽  
Floodplain Vegetation ◽  
Feeding Groups ◽  
Physico Chemical ◽  
Macroinvertebrate Species ◽  
Made In

A structural and functional analysis of macroinvertebrate taxa was made in order to relate species richness and functional feeding groups to hydrological, physico-chemical, nutritional and habitat characteristics of the main channel transects of the entire river Rhine. Species diversity was highest in the upstream parts, Hochrhein and Oberrhein, and lowest in the Mittelrhein, which might be related to the greater variety of habitats and of nutritional resources and the lower degree of pollution in the upstream sections. The relative contributions of the macroinvertebrate species over the various functional feeding groups was remarkably constant with collector species dominating the species composition in all river sections, suggesting an overall importance of FPOM as macroinvertebrate food in the sections studied. The relative share of shredder species suggests the importance of the input of CPOM in the entire river from tributaries, riparian and floodplain vegetation.

scholarly journals Effects of urbanization on habitat characteristics: what are the responses of habitat alteration on functional feeding groups of aquatic invertebrates?

Biotemas ◽  
2019 ◽  
Vol 32 (4) ◽  
pp. 29-44
Author(s):  
Jucimara Andreza Rigotti ◽  
Cesar Augusto Pompêo ◽  
Alessandra Larissa d'Oliveira Fonseca
Keyword(s):  
Aquatic Invertebrates ◽  
Habitat Characteristics ◽  
Functional Feeding Groups ◽  
Habitat Alteration ◽  
Feeding Groups

A urbanização causa muitas alterações nas comunidades aquáticas. Sob ocupação urbana intensa, os rios sofrem as maiores modificações estruturais. O objetivo do trabalho foi avaliar os efeitos da urbanização nas características físicas e químicas do habitat e as respostas da urbanização nos grupos funcionais de alimentação (FFG) dos invertebrados. Parâmetros de qualidade da água (temperatura, condutividade, oxigênio dissolvido, pH, fósforo, clorofila-a, turbidez e matéria orgânica) e parâmetros do escoamento foram medidos em áreas pouco e altamente urbanizadas. Os FFG dos macroinvertebrados foram analisados e aplicados como substitutos de atributos do ecossistema. As diferenças na comunidade dos macroinvertebrados entre as áreas pouco e altamente urbanizadas foram avaliadas pelo escalonamento multidimensional não-métrico (nMDS) e pela análise de variância permutacional multivariada (Permanova). No nMDS foram observadas diferenças entre as áreas pouco e altamente urbanizadas. A Permanova mostrou diferença significativa entre os grupos do nMDS. As áreas pouco urbanizadas apresentaram maior riqueza em cada FFG, por outro lado, as áreas altamente urbanizadas apresentaram maiores valores de abundância de organismos coletores e predadores. Assim, a composição dos FFG respondeu às alterações no habitat que foram representadas pelos parâmetros de qualidade da água e do escoamento.

Preliminary Results on Aquatic Insects in the Me Linh Station for Biodiversity, Vinh Phuc Province

2017 ◽  
Vol 33 (4) ◽  
Author(s):  
Nguyen Van Hieu ◽  
Nguyen Van Vinh
Keyword(s):  
Quantitative Analysis ◽  
Aquatic Insects ◽  
Field Survey ◽  
Aquatic Insect ◽  
Insect Species ◽  
Functional Feeding Groups ◽  
Species Number ◽  
Feeding Groups ◽  
Preliminary Results

An intensive field survey on aquatic insects of Me Linh Station for Biodiversity in Vinhphuc province was conducted in December 2015. Specimens were collected at 8 different sites and aquatic insects were collected both quantitatively by Surber net and qualitatively by hand net, pond net. As a result, a total of 110 aquatic insect species belonging to 98 genera, 49 families and 9 orders were recognized. Among these, the order Ephemeroptera had the highest species number with 26 species, followed by Odonata with 25 species, Trichoptera with 18 species, Coleoptera with 15 species, Hemiptera with 11 species, Diptera with 9 species. Lepidoptera, Plecoptera and Megaloptera had the lowest of species number, represented by 3 species of Lepidoptera, 2 species of Plecoptera and 1 species of Megaloptera. Besides, the quantitative analysis results and the functional feeding groups were provided.

scholarly journals Optimal Solutions for the Use of Sewage Sludge on Agricultural Lands

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 585
Author(s):  
Catalina Iticescu ◽  
Puiu-Lucian Georgescu ◽  
Maxim Arseni ◽  
Adrian Rosu ◽  
Mihaela Timofti ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Agricultural Production ◽  
Agricultural Land ◽  
Chemical Characteristics ◽  
Optimal Solutions ◽  
Physico Chemical ◽  
Agricultural Areas ◽  
The Impact ◽  
Made In

The use of sewage sludge in agriculture decreases the pressure on landfills. In Romania, massive investments have been made in wastewater treatment stations, which have resulted in the accumulation of important quantities of sewage sludge. The presence of these sewage sludges coincides with large areas of degraded agricultural land. The aim of the present article is to identify the best technological combinations meant to solve these problems simultaneously. Adapting the quality and parameters of the sludge to the specificity of the land solves the possible compatibility problems, thus reducing the impact on the environment. The physico-chemical characteristics of the fermented sludge were monitored and optimal solutions for their treatment were suggested so as to allow that the sludge could be used in agriculture according to the characteristics of the soils. The content of heavy metals in the sewage sludge was closely monitored because the use of sewage sludge as a fertilizer does not allow for any increases in the concentrations of these in soils. The article identifies those agricultural areas which are suitable for the use of sludge, as well as ways of correcting some parameters (e.g., pH), which allow the improvement of soil quality and obtained higher agricultural production.

scholarly journals Microhabitat selection and distribution of functional feeding groups of mayfly larvae (Ephemeroptera) in lotic karst habitats

2018 ◽  
pp. 17 ◽  
Author(s):  
Marina Vilenica ◽  
Andreja Brigić ◽  
Michel Sartori ◽  
Zlatko Mihaljević
Keyword(s):  
Water Current ◽  
Functional Feeding Groups ◽  
Feeding Strategies ◽  
Microhabitat Selection ◽  
Dinaric Karst ◽  
Feeding Groups ◽  
Microhabitat Preferences ◽  
One Year ◽  
Physical And Chemical ◽  
Chemical Water

Research examining mayfly ecology in karst streams and rivers has increased in recent years, though microhabitat preferences remain poorly characterized. We examined mayfly assemblage taxonomy, functional feeding groups and microhabitat preferences in two contrasting lotic Dinaric karst catchments, one pristine and one anthropogenically impacted. At monthly intervals over a one-year period, all major microhabitats (i.e. dominated by boulders, cobbles, sand, silt, mosses, or angiosperms) were sampled at sites spanning springs, upper, middle and lower river reaches, and tufa barriers. In both catchments, mayfly species richness was comparable among microhabitats, while mayfly abundance was highest on mosses and lowest on silt. NMDS ordination did not group assemblages according to microhabitat type, which may reflect the greater influence of physical and chemical water properties. In both catchments and all microhabitats, mayfly assemblages were dominated by grazers/scrapers at upstream sites and by detritivores at downstream sites. Active filter feeders were more abundant in microhabitats with silt substrates and lower current velocities. This study demonstrated that certain mayfly species strongly preferred a specific microhabitat type, reflecting their water current preferences and feeding strategies, while other species shifted between microhabitats, likely in search of food resources and shelter. The results emphasize the importance of habitat heterogeneity in supporting diverse communities in karst rivers.

Discovery of coprolites in an Early Permian fern mesophyll

2022 ◽  
Vol 5 (1) ◽  
Author(s):  
WEI-MING ZHOU ◽  
MING-LI WAN ◽  
JOSEF PŠENIČKA ◽  
JUN WANG
Keyword(s):  
Terrestrial Ecosystem ◽  
Terrestrial Ecosystems ◽  
Functional Feeding Groups ◽  
Early Permian ◽  
Plant Organs ◽  
Feeding Groups ◽  
Fossil Records

Plants and arthropods interact with each other and constitute an important part of the modern terrestrial ecosystem (Schoonhoven et al., 2005). Historically, fossil records of plant-arthropod interactions have been well documented in Paleozoic terrestrial ecosystems, which were evidenced by large coprolites containing various plant fragments (e.g., Salter et al., 2012), small larvae and coprolites remained in plant organs (e.g., Feng et al., 2017), and diverse functional feeding groups discovered on plant stems, rachises, roots, leaves and fertile organs (e.g., Liu et al., 2020).

Functional feeding groups of Protist Ciliates (Protist: Ciliophora) on a neotropical flood plain

2021 ◽  
Vol 57 ◽  
pp. 13
Author(s):  
Bianca Ramos Meira ◽  
Melissa Progênio ◽  
Edilaine Corrêa Leite ◽  
Fernando Miranda Lansac-Tôha ◽  
Carolina Leite Guimarães Durán ◽  
...  
Keyword(s):  
Flood Plain ◽  
Food Resources ◽  
Functional Feeding Groups ◽  
Hydrodynamic Conditions ◽  
Efficient Tool ◽  
Ecological Processes ◽  
Clear Separation ◽  
Feeding Groups ◽  
Temporal Segregation ◽  
Influence Of Food

Functional diversity approaches have been an efficient tool in gaining a better understanding of how environmental conditions selected species in a given environment and how they share resources, linking ecological processes to biodiversity patterns. Although most of the protist ciliates are not highly specialized, functional feeding groups with species which ingest similar food can be identified. Thus, this study aimed to compare the abundance of different Functional Feeding Groups (FFG) of ciliates in environments with different hydrodynamic conditions (lotic and lentic) in different hydrological periods (high and low water) in a neotropical flood plain. The samples for analysis of the community of ciliates were taken in March and September of 2010 and 2011, at the subsurface of 12 different hydrodynamic environments. The results of an RDA showed a spatial and temporal segregation of the sampling units, based on the abundance and occurrence of the FFG. In addition, a clear influence of food resources on the structuring of functional ciliate guilds was evidenced. Thus, there were both temporal (hydrological periods) and spatial (different hydrodynamic environments) differences in the distribution of the FFG, with a clear separation of the FFGs between the years studied. In summary, the results of the categorization of species of ciliates in FFG responded satisfactorily suggesting fluctuations in different food resources, which reinforces the idea that the grouping of species by functional characteristics can be a good indicator of the responses of organisms to environmental fluctuations.

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