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FIGURE 4 in Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
FIGURE 4 | A. Non-metrical multidimensional scaling (NMDS) of trophic structure. B. NMDS of species composition. (BU= Before/ upstream, BD= Before/downstream, AU= After/upstream, AD= After/downstream).
FIGURE 3 in Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
FIGURE 3 | A. Trophic structure of the fish assemblage represented by relative biomass of the trophic guilds. Line inside the box = median; box = 25th and 75th percentiles; whiskers = 1.5 x IQR; dots = outliers. B. Non-metrical multidimensional scaling (NMDS) of the relative biomass for each trophic guild. (Detr= Detritivores, Herb= Herbivores, Inse= Insectivores, Omni= Omnivore, Pisc= Piscivore, BU= Before/upstream, BD= Before/downstream, AU= After /upstream, AD=After/downstream).
FIGURE 2 in Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
FIGURE 2 | Daily average flow for three fluviometric stations. S1 and S2 are located upstream of the reservoir, and S3 is located downstream of the dam. The gray dashed line represents the date in which the dam was closed. The Energy Company of Minas Gerais (CEMIG) provided historical flow data (1996 – 2016) of the fluviometric stations nº 1743023 (S1), 1642029 (S2), and 1642044 (S3).
FIGURE 1 in Hydropower affects fish trophic structure both downstream of the dam and upstream of the reservoir
FIGURE 1 | Map of Irapé Hydroelectric Power Plant showing the fish sampling points (1 through 4) and fluviometric stations (S1, S2, S3).
FIGURE 4 in Fish community turnover in a dammed Andean River over time
FIGURE 4 | Observed fish-species richness vs. environments. Violin plot comparing the median, interquartile range, and 95% confidence interval on the distribution pattern of richness among environments (left: native fish, right: non-native fish). The shape of the violin plot represents data distribution by kernel-density estimation, meaning that wider sections represent a higher probability of that given value of richness in that environment; the skinnier sections represent a lower probability. P-values from Kruskal–Wallis test for richness among environment is displayed. The environments were identified from upstream to downstream direction, as follows: (RPM) Porce River isolated between the dams, (RG) Guadalupe River, (RSV) Reservoir, (CFR) Creeks flowing to the reservoir, (CFD) Creeks flowing to the Porce River below the dam and (RPD) Porce River below the Porce III dam.
FIGURE 6 in Fish community turnover in a dammed Andean River over time
FIGURE 6 | Total variance in beta diversity (BDTotal) in each year and first Species Contributions to Beta-Diversity (SCBD) by year. Local contribution to beta-diversity (LCBD) per aquatic environment and year (black circles represents significant values p <0.05).
FIGURE 3 in Fish community turnover in a dammed Andean River over time
FIGURE 3 | Observed fish-species richness vs. time. Observed fish-species richness native (left) and non-native (right) by sampling year in the area of influence of the Porce III reservoir. The generalized linear models and their confidence interval have been added. Each point represents an environment.
FIGURE 1 in Fish community turnover in a dammed Andean River over time
FIGURE 1 | Sampling sites in Porce III reservoir. The digital elevation model (SRTM, 1 arc-second) was obtained from USGS Earth Explorer (https://earthexplorer.usgs.gov) and shape file of dams was obtained from IGAC (https://geoportal.igac.gov.co/). All other products were produced by the authors and are copyright-free.
FIGURE 2 in Fish community turnover in a dammed Andean River over time
FIGURE 2 | Changes in relative abundance over time in each aquatic environment (RPM) Porce River isolated between the dams, (RG) Guadalupe River, (RSV) Reservoir, (CFR) Creeks flowing to the reservoir, (CFD) Creeks flowing to the Porce River below the dam, and (RPD) Porce River below the Porce III dam. White vertical line represents the year of filling and separates the years of pre-construction and postfilling of the reservoir.
FIGURE 5 in Fish community turnover in a dammed Andean River over time
FIGURE 5 | Fish-assemblage ordination in the aquatic environments of Porce III by non-metric multidimensional scaling (nMDS) using Jaccard similarity index. A. Before filling the reservoir from 2008 to 2011 and B. After filling the reservoir from 2017 to 2020. Environments are identified by symbols, and assemblage groups are identified by lines (70% of similarity). (RPM) Porce River isolated between the dams, (RG) Guadalupe River, (RSV) Reservoir, (CFR) Creeks flowing to the reservoir, (CFD) Creeks flowing to the Porce River below the dam, and (RPD) Porce River below the Porce III dam.
FIGURE 3 in Damming in the Madeira River modifies the food spectrum of piscivorous and affects their resource partitioning
FIGURE 3 | Dietary niche breadth values of four piscivorous fishes before (pre-HPP) and after (post-HPP) dam construction in the Madeira River.
FIGURE 2 in Damming in the Madeira River modifies the food spectrum of piscivorous and affects their resource partitioning
FIGURE 2 | The percent volume of prey consumed by four piscivorous fishes in Madeira River. A. Acestrorhynchus falcirostris, B. Acestrorhynchus heterolepis, C. Hydrolycus scomberoides, and D. Rhaphiodon vulpinus. Blue bars correspond to the pre-damming period and red bars to the post-damming period. Items are Aces = Acestrorhynchidae, Cyno = Cynodontidae, Char = Characidae, Curi = Curimatidae, Ster = Sternopygidae, Hemi = Hemiodontidae, Lori = Loricariidae, Auch = Auchenipteridae, Dora = Doradidae, Pime = Pimelodidae, Inse = Insects, Vege = Vegetable.
FIGURE 1 in Damming in the Madeira River modifies the food spectrum of piscivorous and affects their resource partitioning
FIGURE 1 | Study area in the Madeira River portion. Black points representing fixed sampling sites for both pre-and post-damming phases. Triangles represent the sampling sites located in the reservoir area in the post-damming phase. Arrows indicate the river flow.
FIGURE 3 in A cascade of dams affects fish spatial distributions and functional groups of local assemblages in a subtropical river
FIGURE 3 | Analysis of multivariate homogeneity of group dispersions (PERMIDISP) by betadisper boxplot, using the Bray-Curtis index, considering the abundance (CPUEN) of movement/reproductive/size (A) and trophic categories (B), and biomass (CPUEB) of movement/ reproductive/size categories (C) and trophic categories (D). The data was based on sampling sites, and presented by environment groups: [DU, DD] = Sampling points away from the dams; [R1, R2, R3] = sampling points located in the reservoirs; [DR1, DR2, DR3] = locations downstream from dams. Greater distance to spatial median indicates larger dispersion and therefore a more diverse/heterogeneous environment. Box lower and upper endpoints represent the 25th and 75th quartiles, respectively. The horizontal bar and plus symbol inside each box represent median, excluding outliers, which are presented by open circles. See Tabs. 4 and 5 for P values from environments comparisons.
FIGURE 2 in A cascade of dams affects fish spatial distributions and functional groups of local assemblages in a subtropical river
FIGURE 2 | Ordination plots produced by the non-metric multidimensional scaling analysis (NMDS) using the Bray-Curtis index, considering the abundance (CPUEN) of movement/reproductive/size (A) and trophic categories (B), and biomass (CPUEB) of movement/ reproductive/size categories (C) and trophic categories (D), among survey locations. [DU (red triangle), DD (yellow triangle)] = Sampling points away from the dams; [R1 (red circle), R2 (green circle), R3 (orange circle)] = sampling points located in the reservoirs; [DR1 (green square), DR2 (orange square), DR3 (red square)] = locations downstream from dams. Labels are for Detritivores, Invertivores, Carnivores, Omnivores, and Piscivores; S/SM = sedentary/short migration, NPC = no parental care, PC = parental care, IF = internal fertilization, and LM = long migration; and Small, Medium, and Large body sizes.
FIGURE 1 in A cascade of dams affects fish spatial distributions and functional groups of local assemblages in a subtropical river
FIGURE 1 | Sampling locations in the Upper Uruguai River, Brazil. The symbols indicate survey sites: circles represent sites within the reservoirs (R1 = site 3 to 5; R2 = site 7 to 9; R3 = site 11 to 14); squares indicate sites located just below dams [Downstream R1 (DR1) = 6, Downstream R2 (DR2) = 10, Downstream R3 (DR3) = 15], and triangles indicate sites that are most distant from dams [Distant Upstream (DU) = 1 and 2; Distant Downstream (DD) = 16 and 17].
Figure 3 in Microplastic intake of Unio mancus Lamarck 1819 collected from Atatürk Dam Lake, Türkiye
Figure 3. Photographs and µ-Raman spectrum of different types of microplastics by polymers a) nylon-6, b) polyethylene terephthalate, c) cellulose, and d) polypropylene extracted from the soft tissues of U. mancus Lamarck 1819 collected from Atatürk Dam Lake.
Figure 2 in Microplastic intake of Unio mancus Lamarck 1819 collected from Atatürk Dam Lake, Türkiye
Figure 2. The percentage of microplastics categorised by type a), color b), and size c) extracted from the U. mancus Lamarck 1819 samples collected from Atatürk Dam Lake.
Fig. 4 in The fish fauna in the fish passage at the Ourinhos Dam, Paranapanema River
Fig. 4. Relative abundance of species in the fish ladder. Abbreviations: Aa – Apareiodon affinis; Bs – Bryconamericus stramineus; Asf – Astyanax fasciatus; Pn – Parodon nasus; Ot – others; Pa – Piabina argentea; Ha – Hypostomus ancistroides; Tr – Tilapia rendalli; Hsp3 – Hypostomus sp. 3; Hr – Hypostomus cf. regani.
Fig. 6 in Fish passage post-construction issues: analysis of distribution, attraction and passage efficiency metrics at the Baguari Dam fish ladder to approach the problem
Fig. 6. Abundance of fish groups (a) and species (b) along different stretches of the Baguari Dam fish ladder. Each stretch included 27 pools. Lower = first stretch after the fish ladder entrance. Upper = last stretch connected to the reservoir. Number in parenthesis indicates richness for each group.
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International Brain Laboratory public data
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OpenNeuro
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