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118 results for “Eutrophication”
Figure 5 in Temporal dynamics of parasite populations and communities of blue sea catfish Ariopsis guatemalensis (Günther, 1864), in a eutrophic coastal lagoon from Mexican Pacific
Figure 5. Scatter plot of principal component analysis (PCA) of factors that influence the species richness and diversity of the parasite infracommunities of Ariopsis guatemalensis, from Tres Palos lagoon. 'Predictor variables': Season = climatic season, Month = sampling month, GRI = gastric repletion index, GSI = gonadosomatic index, CF = condition factor, Size = host body size (total length), Sex = sex of the host. Infracommunity parameters: Richness = number of parasite species per host, Diversity = Brillouin diversity index values, Load = total number of parasites per infracommunity, Evenness = species evenness, RHsp = number of heteroxenous parasite species, THsp = total number of heteroxenous parasites, TMsp = total number of monoxenous parasites. Ellipses represent sampling months.
Fig. 7 in Diversity and Distribution of Peritrich Ciliates on the Snail Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in a Eutrophic Lotic System
Fig. 7. Non-metric multidimensional scaling (NMDS) for peritrichs species abundance on Physa acuta shell. Stress = 0. C_pol = Carchesium polypinum, E_plic = Epistylis plicatilis, E_sp = Epistylis sp., O_art = Opercularia articulata, T_kel = Thuricola kellicottiana, V_cam = Vorticella campanula, V_sp = Vorticella sp.
Fig. 6 in Diversity and Distribution of Peritrich Ciliates on the Snail Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in a Eutrophic Lotic System
Fig. 6. Abundance, density, diversity and dominance of peritrich epibionts on sites of the Physa acuta shell. Different letters indicate statistical differences p <0.05 and the symbol *indicate p> 0.05.
Fig. 5 in Diversity and Distribution of Peritrich Ciliates on the Snail Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in a Eutrophic Lotic System
Fig. 5. Abundance and density of peritrich ciliates on the sites of the Physa acuta shell. Distribution of the total number of epibionts throughout the antero-posterior axis of the shell. © 2018 Academia Sinica, Taiwan
Fig. 4 in Diversity and Distribution of Peritrich Ciliates on the Snail Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in a Eutrophic Lotic System
Fig. 4. Abundance and density of peritrich species on the surface on the Physa acuta shell. Different letters indicate statistical differences (p <0.05) and * indicates species present exclusively on the dorsal surface.
Fig. 2 in Diversity and Distribution of Peritrich Ciliates on the Snail Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in a Eutrophic Lotic System
Fig. 2. Schematic representation of the distribution of peritrichs ciliates species on the Physa acuta shell. © 2018 Academia Sinica, Taiwan
Fig. 1 in Diversity and Distribution of Peritrich Ciliates on the Snail Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in a Eutrophic Lotic System
Fig. 1. in vivo photomicrographics of peritrich ciliates species on Physa acuta. (A-C) Peritrich ciliates attached to the shell. (D) Epistylis sp. (E) Opercularia articulata. (F) Carchesium polypinum. (G) Vorticella sp. (H) Vorticella campanula. (I) Epistylis plicatilis. (J) Thuricola kellicottiana. Scale bars: A = 0.15 cm; B = 1.5 mm; C = 0.5 mm; D-L = 25 µm.
Data from: Warming and eutrophication interactively drive changes in the methane-oxidizing community of shallow lakes
<p>Freshwater ecosystems are the largest natural source of the greenhouse gas methane (CH<sub>4</sub>), with shallow lakes a particular hot spot. Eutrophication and warming generally increase lake CH<sub>4</sub> emissions but their impacts on the sole biological methane sink - methane oxidation - and methane-oxidizer community dynamics are poorly understood. We used the world's longest-running freshwater climate-change mesocosm experiment to determine how methane-oxidizing bacterial (MOB) abundance and composition, and methane oxidation potential in the sediment respond to eutrophication, short-term nitrogen addition and warming. After nitrogen addition, MOB abundance and methane oxidation potential increased, while warming increased MOB abundance without altering methane oxidation potential. MOB community composition was driven by both temperature and nutrient availability. Eutrophication increased relative abundance of type I MOB <i>Methyloparacoccus</i>. Warming favoured type II MOB <i>Methylocystis</i> over type I MOB<i> Methylomonadaceae</i>, shifting the MOB community from type I dominance to type I and II co-dominance, thereby altering MOB community traits involved in growth and stress-responses. This shift to slower-growing MOB may explain why higher MOB abundance in warmed mesocosms did not coincide with higher methane oxidation potential. Overall, we show that eutrophication and warming differentially change the MOB community, resulting in an altered ability to mitigate CH<sub>4</sub> emissions from shallow lakes.</p>
Synergistic effects of warming and internal nutrient loading interfere with the long-term stability of lake restoration and induce sudden re-eutrophication
<p><strong>This repository contains the dataset linked to the following publication:</strong></p> <p><strong>Article title: </strong>Synergistic effects of warming and internal nutrient loading interfere with the long-term stability of lake restoration and induce sudden re-eutrophication</p> <p><strong>Journal: </strong><em>Environmental Science & Technology</em></p> <p><strong>DOI</strong>: 10.1021/acs.est.2c07181</p> <p><strong>Abstract:</strong> Phosphorus (P) precipitation is among the most effective treatments to mitigate lake eutrophication. However, after a period of high effectiveness, studies have shown possible re-eutrophication and the return of harmful algal blooms. While such abrupt ecological changes were attributed to the internal P loading, the role of lake warming and its potential synergistic effects with internal loading, thus far, has been understudied. Here, in a eutrophic lake in central Germany, we quantified the driving mechanisms of the abrupt re-eutrophication and cyanobacterial blooms in 2016 (30 years after the first P precipitation). A process-based lake ecosystem model (GOTM-WET) was established using a high-frequency monitoring dataset covering contrasting trophic states. Model analyses suggested that the internal P release accounted for 68% of the cyanobacterial biomass proliferation, while lake warming contributed to 32%, including direct effects via promoting growth (18%) and synergistic effects via intensifying internal P loading (14%). The model further showed that the synergy was attributed to prolonged lake hypolimnion warming and oxygen depletion. Our study unravels the substantial role of lake warming in promoting cyanobacterial blooms in re-eutrophicated lakes. The warming effects on cyanobacteria via promoting internal loading need more attention in lake management, particularly for urban lakes.</p> <p><strong>SYNOPSIS: </strong>Warming synergistically promotes re-eutrophication with internal nutrient loading and exacerbates cyanobacterial blooms in urban lakes 30 years after phosphorus mitigation.</p> <p> </p> <p><strong>Data description </strong>by Xiangzhen Kong (<a href="mailto:xzkong@niglas.ac.cn">xzkong@niglas.ac.cn</a>), 2023-02-20</p> <p>---Wet chemical analysis on water samples taken at five depths (0.5, 2.5, 5.0, 7.0 and 9.0 m) from the deepest point in the lake (BA1) at biweekly intervals from 2018.5-2021.8.</p> <p> File name:</p> <ul> <li>BAB_BA1_TN_mgL.obs (total nitrogen concentration)</li> <li>BAB_BA1_NH4_mgL.obs (ammonium nitrogen concentration)</li> <li>BAB_BA1_NO3_mgL.obs (nitrate nitrogen concentration)</li> <li>BAB_BA1_TP_mgL.obs (total phosphorus concentration)</li> <li>BAB_BA1_SRP_mgL.obs (Soluble reactive phosphorus concentration)</li> <li>BAB_BA1_DP_mgL.obs (dissolved P concentration)</li> <li>BAB_BA1_DOC_mgL.obs (Dissolved organic carbon concentration)</li> <li>BAB_BA1_Si_mgL.obs (dissolved silicon concentration)</li> <li>BAB_BA1_Chla_HPLC_DIN_mgL.obs (Chl-a concentration)</li> </ul> <p> </p> <p>---CTD probe profile data from the deepest point in the lake (BA1) from 2017.8 to 2021.8 at biweekly basis with approximately 0.1 m vertical resolution</p> <p> File name:</p> <ul> <li>t_prof_file_barleber_ctm644.obs (water temperature)</li> <li>oxy_prof_file_barleber_ctm644 (Dissolved oxygen)</li> <li>turb_prof_file_barleber_ctm644.obs (Turbidity)</li> <li>chla_prof_file_barleber_ctm644.obs (Chl-a concentration)</li> </ul> <p> </p> <p>---BBE probe profile data from the deepest point in the lake (BA1) from 2017.8 to 2021.8 at biweekly basis with approximately 0.1 m vertical resolution</p> <p> File name:</p> <ul> <li>totalChla_prof_file_barleber_FP2101.obs (Chl-a concentration)</li> <li>bluegreen_prof_file_barleber_FP2101.obs (Blue-green algae Chl-a concentration)</li> <li>green_prof_file_barleber_FP2101.obs (Green algae Chl-a concentration)</li> <li>diatom_prof_file_barleber_FP2101.obs (Diatom Chl-a concentration)</li> </ul> <p> </p> <p> </p>
Disentangling the effects of eutrophication and natural variability on macrobenthic communities across French coastal lagoons
<p>We present here the raw data and scripts to reproduce the results presented in the preprint "Disentangling the effects of eutrophication and natural variability on macrobenthic communities across French coastal lagoons" available on BioRxiv. Before using the scripts and associated data, we recommend reading the "readme" word document also available, which details the information available in the different data sheets. </p> <p>Preprint abstract : </p> <p>Coastal lagoons are transitional ecosystems that host a unique diversity of species and support many ecosystem services. Owing to their position at the interface between land and sea, they are also subject to increasing human impacts, which alter their ecological functioning. Because coastal lagoons are naturally highly variable in their environmental conditions, disentangling the effects of anthropogenic disturbances like eutrophication from those of natural variability is a challenging, yet necessary issue to address. Here, we analyze a dataset composed of macrobenthic invertebrate abundances and environmental variables (hydro-morphology, water, sediment and macrophytes) gathered across 29 Mediterranean coastal lagoons located in France, to characterize the main drivers of community composition and structure. Using correlograms, linear models and variance partitioning, we found that lagoon hydro-morphology (connection to the sea and lagoon surface), which affects the level of environmental variability (salinity and temperature), as well as lagoon-scale benthic habitat diversity (using macrophyte morphotypes) seemed to regulate macrofauna distribution, while eutrophication and associated stressors like low dissolved oxygen, acted upon the existing communities, mainly by reducing species richness and diversity. Furthermore, M-AMBI, a multivariate index composed of species richness, Shannon diversity and AMBI (AZTI's Marine Biotic Index) and currently used to evaluate the ecological state of French coastal lagoons, was more sensitive to eutrophication (18%) than to natural variability (9%), with nonetheless 49% of its variability explained jointly by both. To improve the robustness of benthic indicators like M-AMBI and increase the effectiveness of lagoon benthic habitat management, we call for a revision of the ecological groups at the base of the AMBI index and of the current lagoon typology which could be inspired by the lagoon-sea connection levels used in this study.</p>
Data from: Daphniid zooplankton assemblage shifts in response to eutrophication and metal contamination during the Anthropocene
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Data from: Connectivity and zebra mussel invasion offer short‐term buffering of eutrophication impacts on floodplain lake landscape biodiversity
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Data from: Reproductive strategies and isolation-by-demography in a marine clonal plant along an eutrophication gradient
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Data from: Tracing the effects of eutrophication on molluscan communities in sediment cores: outbreaks of an opportunistic species coincide with reduced bioturbation and high frequency of hypoxia in the Adriatic Sea
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Data from: The impact of conservation management on the community composition of multiple organism groups in eutrophic interconnected man-made ponds
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Fast and furious: Early differences in growth rate drive short-term plant dominance and exclusion under eutrophication
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Data from: Warming and eutrophication interactively drive changes in the methane-oxidizing community of shallow lakes
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Does lake eutrophication support biological invasions in rivers? A study on Dreissena polymorpha (Bivalvia) in lake-river ecotones
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Data from: Density-dependent positive feedbacks buffer aquatic plants from interactive effects of eutrophication and predator loss
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Long-term vegetation changes in Nardus grasslands indicate eutrophication, recovery from acidification, and management change as the main drivers
<p>Abstract</p> <p>Questions</p> <p>Which trends and patterns of community change occurred in <em>Nardus</em> grasslands over recent decades in parts of the Continental biogeographic region of Germany? Are patterns and trends consistent across two study regions? Do impacts of environmental changes on <em>Nardus</em> grasslands in Central Europe correspond to those identified in the European Atlantic biogeographic region?</p> <p>Location</p> <p>East Hesse Highlands, Germany</p> <p>Methods</p> <p>In 2012-2015, we re-surveyed quasi-permanent plots that had been initially surveyed between 1971 and 1987, and re-measured soil parameters. We tested for differences in species frequency and cover, mean Ellenberg indicator values, species richness, and soil variables. Nitrogen- and sulphur-deposition data were analysed to evaluate possible effects of atmospheric pollutants. We used regression- and redundancy analyses to identify environmental drivers responsible for changes in species composition.</p> <p>Results</p> <p>Across regions, we found significant increases in soil pH, Ellenberg R and N indicator values, plant-nutrient indicators, forbs, species of agricultural grasslands and of fallows. By contrast, the C:N ratio<em>, Nardus</em> grassland specialists, low-nutrient indicators, and graminoids declined. Changes in species composition were related to changes in pH and management. There was a strong decrease in sulphur and a moderate increase in nitrogen deposition, whose local scale pattern did not correlate with changes in soil parameters. However, there was an effect of local NH<sub>y</sub> changes on species composition.</p> <p>Conclusion</p> <p>The findings indicate significant overall eutrophication, a trend towards less acidic conditions and insufficient management, which are widely consistent across our study regions and correspond to recent reports of vegetation changes and recovery from acidification in the Atlantic biogeographic region. We assume the reduced sulphur deposition during recent decades to be a major driver of these changes, combined with increased nitrogen deposition and reduced management intensity. This suggests a large-scale validity of processes that influenced changes in <em>Nardus</em> grasslands of Western and Central Europe.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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DANDI Archive for NWB datasets
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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.