scholarly journals Influence of antifouling paint on freshwater invertebrates (Mytilidae, Chironomidae and Naididae): density, richness and composition

2015 ◽  
Vol 75 (4 suppl 1) ◽  
pp. 70-78
Author(s):  
D. S. Fujita ◽  
A. M. Takeda ◽  
R. Coutinho ◽  
F. C. Fernandes
Keyword(s):  
Organic Matter ◽  
Aquatic Invertebrates ◽  
Substrate Surface ◽  
Artificial Substrates ◽  
Limnoperna Fortunei ◽  
Invertebrate Community ◽  
Antifouling Paints ◽  
Invertebrate Assemblages ◽  
Paint Coatings ◽  
Invertebrate Colonization

Abstract We conducted a study about invertebrates on artificial substrates with different antifouling paints in order to answer the following questions 1) is there lower accumulation of organic matter on substrates with antifouling paints, 2) is invertebrate colonization influenced by the release of biocides from antifouling paints, 3) is the colonization of aquatic invertebrates positively influenced by the material accumulated upon the substrate surface and 4) is the assemblage composition of invertebrates similar among the different antifouling paints? To answer these questions, four structures were installed in the Baía River in February 1st, 2007. Each structure was composed of 7 wood boards: 5 boards painted with each type of antifouling paints (T1, T2, T3, T4 and T5), one painted only with the primer (Pr) and the other without any paint (Cn). After 365 days, we observed a greater accumulation of organic matter in the substrates with T2 and T3 paint coatings. Limnoperna fortunei was recorded in all tested paints, with higher densities in the control, primer, T2 and T3. The colonization of Chironomidae and Naididae on the substrate was positively influenced by L. fortunei density. The non-metric multidimensional scaling (NMDS) of the invertebrate community provided evidence of the clear distinction of invertebrate assemblages among the paints. Paints T2 and T3 were the most similar to the control and primer. Our results suggest that antifouling paints applied on substrates hinder invertebrate colonization by decreasing the density and richness of invertebrates.

Measuring Organic Matter Retained by Aquatic Invertebrates

1967 ◽  
Vol 24 (11) ◽  
pp. 2467-2471 ◽  
Author(s):  
R. E. Johannes ◽  
Masako Satomi
Keyword(s):  
Organic Matter ◽  
Aquatic Invertebrates

not available

A functional classification of the drift: traits that influence invertebrate availability to salmonids

1997 ◽  
Vol 54 (6) ◽  
pp. 1211-1234 ◽  
Author(s):  
Russell B Rader
Keyword(s):  
Rocky Mountains ◽  
Aquatic Invertebrates ◽  
Food Resource ◽  
Trophic Levels ◽  
Functional Classification ◽  
Invertebrate Community ◽  
Important Food ◽  
Stream Invertebrates ◽  
Central Rocky Mountains

Twelve categories/traits were used to classify and rank aquatic invertebrates based on their propensity to drift and importance as a food resource for salmonids. Invertebrate availability was based on their (i) propensity to intentionally drift, (ii) likelihood of being accidentally dislodged by the current, (iii) drift distance, (iv) adult drift, (v) benthic exposure, (vi) body size, and (vii) abundance. This study represents the first attempt to characterize the intentional drift propensity of stream invertebrates. A ranking procedure separated invertebrates into Baetis and three groups decreasing in availability. Predicted ranks were significantly correlated with the actual rank of invertebrates in trout guts taken in three separate studies conducted in the central Rocky Mountains, suggesting that this procedure can effectively rank invertebrates based on their availability as a food resource for salmonids. A cluster analysis separated the 95 taxa into four drift guilds and six availability groups. This study provides criteria for determining when alterations in invertebrate community composition will affect food resources for higher trophic levels by causing a decline in the most available taxa. This research also supports previous findings that floods are important in maintaining invertebrates that represent an important food resource for salmonids.

Revisiting the Fates of Dead Leaves That Fall into Streams

2019 ◽  
Vol 50 (1) ◽  
pp. 547-568 ◽  
Author(s):  
Jane C. Marks
Keyword(s):  
Organic Matter ◽  
Food Web ◽  
Leaf Litter ◽  
Microbial Growth ◽  
Aquatic Invertebrates ◽  
Trophic Levels ◽  
Carbon And Nitrogen ◽  
Nitrogen Fluxes ◽  
Detrital Carbon ◽  
Constituent Elements

As terrestrial leaf litter decomposes in rivers, its constituent elements follow multiple pathways. Carbon leached as dissolved organic matter can be quickly taken up by microbes, then respired before it can be transferred to the macroscopic food web. Alternatively, this detrital carbon can be ingested and assimilated by aquatic invertebrates, so it is retained longer in the stream and transferred to higher trophic levels. Microbial growth on litter can affect invertebrates through three pathways, which are not mutually exclusive. First, microbes can facilitate invertebrate feeding, improving food quality by conditioning leaves and making them more palatable for invertebrates. Second, microbes can be prey for invertebrates. Third, microbes can compete with invertebrates for resources bound within litter and may produce compounds that retard carbon and nitrogen fluxes to invertebrates. As litter is broken down into smaller particles, there are many opportunities for its elements to reenter the stream food web. Here, I describe a conceptual framework for evaluating how traits of leaf litter will affect its fate in food webs and ecosystems that is useful for predicting how global change will alter carbon fluxes into and out of streams.

scholarly journals Spatiotemporal dynamics of terrestrial invertebrate assemblages in the riparian zone of the Wewe river, Ashanti region, Ghana

2020 ◽  
Vol 15 (1) ◽  
pp. 331-345
Author(s):  
Collins Ayine Nsor ◽  
Samuel K. Oppong ◽  
Emmanuel Danquah ◽  
Michael Ochem ◽  
Osei Owusu Antobre
Keyword(s):  
Ecosystem Health ◽  
Riparian Zone ◽  
Spatiotemporal Dynamics ◽  
Geometric Series ◽  
Invertebrate Community ◽  
Wet Season ◽  
Disturbed Habitat ◽  
Ashanti Region ◽  
Terrestrial Invertebrate ◽  
Invertebrate Assemblages

AbstractThis study assessed invertebrate response to disturbances in the riparian zone of the Wewe river, using geometric series, rarefaction, Renyi diversity, and CCA models. We sampled 2,077 individuals (dry season) and 2,282 (wet season) belonging to 16 invertebrate orders. The severely disturbed habitat registered the highest individuals (n = 1,999), while the least was the moderately disturbed habitat (n = 740). Seasonal assemblages were not significantly different. Fire, farming, tree felling, and erosion explained 66.8% and 60.55% in the dry and wet seasons, respectively, of variations in invertebrate assemblages. This suggests threats to the invertebrate community and the riparian ecosystem health by anthropogenic interventions.

Influence of dissolved organic matter and inorganic nutrients on the biofilm bacterial community on artificial substrates in a northeastern Ohio, USA, stream

2006 ◽  
Vol 52 (6) ◽  
pp. 540-549 ◽  
Author(s):  
Ola A Olapade ◽  
Laura G Leff
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Nutrient Dynamics ◽  
Inorganic Nutrients ◽  
Artificial Substrates ◽  
Response Patterns ◽  
Ceramic Tiles ◽  
Phylogenetic Groups ◽  
Leaf Leachate ◽  
The Individual

Stream bacteria may be influenced by the composition and availability of dissolved organic matter (DOM) and inorganic nutrients, but knowledge about how individual phylogenetic groups in biofilm are affected is still limited. In this study, the influence of DOM and inorganic nutrients on stream biofilm bacteria was examined. Biofilms were developed on artificial substrates (unglazed ceramic tiles) for 21 days in a northeastern Ohio (USA) stream for five consecutive seasons. Then, the developed biofilm assemblages were exposed, in the laboratory, to DOM (glucose, leaf leachate, and algal exudates) and inorganic nutrients (nitrate, phosphate, and nitrate and phosphate in combination) amendments for 6 days. Bacterial numbers in the biofilms were generally higher in response to the DOM treatments than to the inorganic nutrient treatments. There were also apparent seasonal variations in the response patterns of the individual bacterial taxa to the nutrient treatments; an indication that limiting resources to bacteria in stream biofilms may change over time. Overall, in contrast to the other treatments, bacterial abundance was generally highest in response to the low-molecular-weight DOM (i.e., glucose) treatment. These results further suggest that there are interactions among the different bacterial groups in biofilms that are impacted by the associated nutrient dynamics among seasons in stream ecosystems.Key words: biofilms, nutrients, DOM, bacteria, in situ hybridization.

scholarly journals Effects of non-native Spartina patens on plant and sediment organic matter carbon incorporation into the local invertebrate community

2010 ◽  
Vol 12 (11) ◽  
pp. 3825-3838 ◽  
Author(s):  
Henry M. Page ◽  
Mariano Lastra ◽  
Iván F. Rodil ◽  
María Jesús I. Briones ◽  
Josefina Garrido
Keyword(s):  
Organic Matter ◽  
Spartina Patens ◽  
Sediment Organic Matter ◽  
Invertebrate Community ◽  
Carbon Incorporation

scholarly journals Seasonal Response of Stream Biofilm Communities to Dissolved Organic Matter and Nutrient Enrichments

2005 ◽  
Vol 71 (5) ◽  
pp. 2278-2287 ◽  
Author(s):  
Ola A. Olapade ◽  
Laura G. Leff
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Inorganic Nutrients ◽  
Artificial Substrates ◽  
Response Patterns ◽  
Storm Events ◽  
Leaf Leachate ◽  
Bacterial Assemblages ◽  
The Impact ◽  
Algal Exudates

ABSTRACT Dissolved organic matter (DOM) and inorganic nutrients may affect microbial communities in streams, but little is known about the impact of these factors on specific taxa within bacterial assemblages in biofilms. In this study, nutrient diffusing artificial substrates were used to examine bacterial responses to DOM (i.e., glucose, leaf leachate, and algal exudates) and inorganic nutrients (nitrate and phosphate singly and in combination). Artificial substrates were deployed for five seasons, from summer 2002 to summer 2003, in a northeastern Ohio stream. Differences were observed in the responses of bacterial taxa examined to various DOM and inorganic nutrient treatments, and the response patterns varied seasonally, indicating that resources that limit the bacterial communities change over time. Overall, the greatest responses were to labile, low-molecular-weight DOM (i.e., glucose) at times when chlorophyll a concentrations were low due to scouring during significant storm events. Different types of DOM and inorganic nutrients induced various responses among bacterial taxa in the biofilms examined, and these responses would not have been apparent if they were examined at the community level or if seasonal changes were not taken into account.

scholarly journals Trichoptera (Insecta) in water hyacinth roots: evaluation of the influence of exotic mussel and environmental factors

2015 ◽  
Vol 27 (4) ◽  
pp. 341-355 ◽  
Author(s):  
Sandra Francisca Marçal ◽  
Claudia Tasso Callil ◽  
Rogério Conceição Lima dos Santos
Keyword(s):  
Water Hyacinth ◽  
National Park ◽  
Eichhornia Crassipes ◽  
Aquatic Invertebrates ◽  
Biotic Resistance ◽  
Abiotic Factors ◽  
Limnoperna Fortunei ◽  
Hypoxic Conditions ◽  
Initial Assumption ◽  
Floating Vegetation

Abstract Aim: Information on the influence of mussel macrofouling in invertebrate communities usually have the initial assumption of negative interference. Methods We analyzed this relationship in a community of aquatic invertebrates associated to roots of Eichhornia crassipes in 15 shallow marginal lakes in the Pantanal National Park and surroundings. We sampled quadrants of floating vegetation, identified the aggregate fauna and evaluated the density effect of Limnoperna fortunei, as well as abiotic factors of the Trichoptera community using ordinances and multivariate regressions. Results We found no significant relationship between the abundance of mussels on the macrophytes and the Trichoptera larvae. However, we observed an interference of oxygen on the structure and density of genera. The composition and abundance of the phytophylous caddisfly community is influenced by the depth and the concentration of oxygen dissolved in the marginal regions of the lakes. Conclusions We suggest that the absence of the effects of the assessed L. fortunei in the community is related to the 'biotic resistance', in which the phytophylous caddisfly demonstrated adaptation to an environment characterized by hypoxic conditions in the dry season. L. fortunei was limited by the depth and reduction of oxygen, presenting lower density in lakes with such characteristics.

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