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137 results for “macrophytes”
Supplementary material 1 from: Maissour A, Benamar S (2019) Impact of hydromorphological pressures on the macrophytes bioindicators of the ecological water quality in Mediterranean rivers. BioRisk 14: 1-14. https://doi.org/10.3897/biorisk.14.30319
: Data type: occurences
Macrophyte litter mixtures mediate decomposition processes in coastal sediments
<p><strong>Data for the MS: Macrophyte litter mixtures mediate decomposition processes in coastal sediments</strong></p>
Linked collectors and determiners for: Macrophytes_CLF.
Natural history specimen data linked to collectors and determiners held within, "Macrophytes_CLF". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/598c2228-f727-4eae-b7fa-592395cad8c6">https://bionomia.net/dataset/598c2228-f727-4eae-b7fa-592395cad8c6</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/598c2228-f727-4eae-b7fa-592395cad8c6">https://gbif.org/dataset/598c2228-f727-4eae-b7fa-592395cad8c6</a>. Formatted as a Frictionless Data package.
Data from: High summer macrophyte cover increases abundance, growth and feeding of juvenile Atlantic salmon
<p>Aquatic habitats are severely threatened by human activities. For anadromous species, managing freshwater habitats to maximise production of more, larger juveniles could improve resilience to threats in marine habitats and enhance population viability. In some juvenile salmonid habitats, complexity created by large substrates provides resources and reduces competitive interactions, thereby promoting juvenile production. In lowland rivers, which lack large substrates, aquatic plants might provide similar complexity and enhance fish productivity. To test the influence of aquatic plants on juvenile Atlantic salmon and sympatric brown trout in a lowland river, we directly manipulated cover of the dominant macrophyte, <i>Ranunculus</i>, in nine sites during summer and autumn for two years. We quantified the abundance, site retention and growth of salmon and trout under high, medium and low <i>Ranunculus</i> cover. To investigate the effects of <i>Ranunculus </i>cover on feeding opportunities and interspecific competition, we quantified available prey biomass and body size, fish diet composition, and compared dietary niche overlap. Experimentally increased <i>Ranunculus</i> cover supported higher salmon abundance in summer and autumn, and higher site retention and growth of salmon in summer. Trout abundance and growth were not influenced by <i>Ranunculus</i> cover, but trout site retention doubled in high relative to low cover sites. Despite weak effects of <i>Ranunculus </i>cover on prey availability, salmon and trout inhabiting high cover sites consumed larger prey and a higher biomass of prey. Furthermore, dietary niche overlap was lower in high relative to low cover sites, suggesting that abundant <i>Ranunculus </i>reduced interspecific competition. This field experiment shows that high <i>Ranunculus </i>cover can support more and better growing juvenile salmon, and facilitate foraging and co-existence of sympatric salmonid species. Maintaining or enhancing natural macrophyte<i> </i>cover can be achieved through sympathetic in-river and riparian vegetation management and mitigating pressures on them, such as sediment inputs and low flows, or through planting. Further research should test whether<i> </i>macrophyte cover benefits propagate to subsequent life-stages, particularly juvenile overwintering associated with high mortality. This knowledge, in combination with our findings, would further clarify whether beneficial juvenile habitat can improve the viability of at-risk salmonid populations. Overall, our findings suggest that the aims of river restoration might be achieved through promotion of instream aquatic vegetation.</p>
Figure 2 in Temporal variation and structure of macro-epifauna associated with macrophytes in the Bizerte lagoon (Tunisia, SW Mediterranean Sea)
Figure 2. Monthly variations of environmental factors at Menzel Jemil during sampling periods.
Fig. 1 in The ichthyofauna of drifting macrophyte mats in the Ivinhema River, upper Paraná River basin, Brazil
Fig. 1. Map of the floodplain section of the upper Paraná River included in this study, identifying the Ivinhema River and the approximate location where the drifting macrophyte mats were intercepted.
Fig. 3 in Simple relationships to predict attributes of fish assemblages in patches of submerged macrophytes
Fig. 3. Relationships between macrophyte biomass and fish density (a) and species richness (b), in patches dominated by E. densa and E. najas.
Data from: Integrated biomarker responses of the submerged macrophyte Vallisneria spiralis via hydrological processes from Lake Poyang, China
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Data from: High summer macrophyte cover increases abundance, growth and feeding of juvenile Atlantic salmon
Open the record for dataset details and reuse information.
Data from: Opposite effects of nutrient enrichment and an invasive snail on the growth of invasive and native macrophytes
<p class="MsoNormal">Many ecosystems are now co-invaded by alien plant and herbivore species. The evolutionary <span>naivety</span> of native plants to alien herbivores can make the plants more susceptible to detrimental effects of herbivory than co-occurring invasive plants, in accordance with the apparent competition hypothesis. Moreover, the invasional meltdown hypothesis predicts that in multiply invaded ecosystems, invasive species can facilitate each other's impacts on native communities. Although there is growing empirical support for these hypotheses, facilitative interactions between invasive plants and herbivores remain underexplored in aquatic ecosystems. Many freshwater ecosystems are co-invaded by aquatic macrophytes and mollusks and simultaneously experience nutrient enrichment. However, the interactive effects of these ecological processes on native macrophyte communities remain an underexplored area. To test these effects, we performed a freshwater mesocosm experiment in which we grew a synthetic native community of three macrophyte species under two levels of invasion by an alien macrophyte <em>Myriophyllum aquaticum</em> (invasion vs. no-invasion) and fully crossed with two levels of nutrient enrichment (enrichment vs. no-enrichment) and herbivory by an invasive snail <em>Pomacea canaliculata</em> (herbivory vs. no-herbivory). In line with the invasional meltdown and apparent competition hypotheses, we found that the proportional above-ground biomass yield of the invasive macrophyte, relative to that of the native macrophyte community, was significantly greater in the presence of the invasive herbivore. Evidence of a reciprocal facilitative effect of the invasive macrophyte on the invasive herbivore is provided by the results showing that the herbivore produced greater egg biomass in the presence than in the absence of <em>M. aquaticum</em>. However, nutrient enrichment reduced the mean proportional above-ground biomass yield of the invasive macrophyte. Our results suggested that herbivory by invader <em>P. canaliculata</em> may enhance invasiveness of <em>M. aquaticum</em>. However, nutrient enrichment of habitats that already harbor <em>M. aquaticum</em> may slow down invasive spread of the macrophyte. Broadly, our study underscores the significance of considering several factors and their interactions when assessing the impact of invasive species, especially considering that many habitats experience co-invasion by plants and herbivores and simultaneously undergo various other disturbances, including nutrient enrichment. </p>
Latitudinal variations in leaf bacterial functions majorly affect the biomass production of a submerged macrophytes
<p><span>Although microbial biogeography has been extensively explored in free-living communities, our understanding of the large-scale latitudinal diversity patterns of host-associated bacteria remained limited in freshwater ecosystems. To fill this knowledge gap, we conducted a field survey spanning a 2,800 km transect along a latitudinal gradient and explored the composition and structure of bacterial communities on the surfaces of <em>Myriophyllum spicatum</em>. </span></p>
Figure 1 from: Serafim-Júnior M, Perbiche-Neves G, Lansac-Toha F (2019) Environments and macrophytes as main variables controlling rotifers in a river/lake system before Porto Primavera Reservoir construction. Zoologia 36: 1-8. https://doi.org/10.3897/zoologia.36.e24191
Figure 1 Sampling area and sampling sites.
Figure 4 from: Serafim-Júnior M, Perbiche-Neves G, Lansac-Toha F (2019) Environments and macrophytes as main variables controlling rotifers in a river/lake system before Porto Primavera Reservoir construction. Zoologia 36: 1-8. https://doi.org/10.3897/zoologia.36.e24191
Figure 4 Mean values of Shannon-Wienner index diversity and eveness among the sampling months.
Figure 3 from: Serafim-Júnior M, Perbiche-Neves G, Lansac-Toha F (2019) Environments and macrophytes as main variables controlling rotifers in a river/lake system before Porto Primavera Reservoir construction. Zoologia 36: 1-8. https://doi.org/10.3897/zoologia.36.e24191
Figure 3 Mean values of richness and total abundance among the sampling months.
Macrophyte species richness improves resilience to grazing
<p>To investigate how macrophyte species richness influences resilience to increased grazing pressure, we simulated green turtle grazing events every two weeks for eight weeks in plots that naturally varied in species richness. We recorded macrophyte metrics between the simulated grazing events and after a longer four-week recovery period.</p>
Data from: Opposite effects of nutrient enrichment and an invasive snail on the growth of invasive and native macrophytes
Open the record for dataset details and reuse information.
Transcriptomic approach for understanding molecular mechanisms of in situ environmental toxicity of Hg using an aquatic microalgae and a macrophyte
GEO Series GSE84995. Chlamydomonas reinhardtii; Elodea nuttallii. 18 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.