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517 results for “Floodplain”
FIGURE 1 in Commercial fisheries in a mega unregulated floodplain river: Assessment of the most favourable hydrological conditions for its preservation
FIGURE 1 Area of study in the middle Paraná River, Argentina. Numbers (Cod) indicate ports where data of commercial fisheries were obtained: Producción Pesquera Argentina (the Argentine inland fishery production; PPARG) 1–2; 7–8; 10 and Ministerio de Producción (Ministry of Production), Subdirección General de Ecología de Santa Fe, Sub-directorate General of Ecology of Santa Fe Province (PPSF 3–6; 9). LH: Laboratory of Hydroecology. INALI: Argentine National Institute of Limnology. fd: flow direction. (Modified from Rabuffetti et al., 2016)
FIGURE 6 in Commercial fisheries in a mega unregulated floodplain river: Assessment of the most favourable hydrological conditions for its preservation
FIGURE 6 Interannual fish abundance and size structure of landed and measured fishes (total and per species) for distinct hydroclimatic conditions. (), monthly mean water level (Hmax). (), mean monthly temperature; (), total number of individuals collected (n); (), number of individual measured (standard length Ls). () size 1-10, () size 10-20, () size 20-30, () size 30-40
FIGURE 5 in Commercial fisheries in a mega unregulated floodplain river: Assessment of the most favourable hydrological conditions for its preservation
FIGURE 5 (a, b) Interannual maximum water levels (Hmax) at Santa Fe Port gauge () and fluctuation of Prochilodus lineatus catches by institution datasets in the middle Paraná River 1935–2016. (c) catches per decade from PPARG and (d) INALI datasets. (), Total catch; (), adults and pre-adults; (), Young-of-the-year;, spring–summer flood events (> 4.5 m at Sante Fe Port gauge). PPARG, Producción Pesquera Argentina; PPSF, Ministerio de Producción, Sub-directorate General of Ecology of Santa Fe Province; INALI, Argentine National Institute of Limnology; LH, Laboratory of Hydroecology
FIGURE 3 in Commercial fisheries in a mega unregulated floodplain river: Assessment of the most favourable hydrological conditions for its preservation
FIGURE 3 (a) Maximum water levels (Hmax) and duration of floods when water level was>4.5 m at Sante Fe Port guage between 1905 and 2016. (b) Correlation between Hmax and duration of floods considering only years with biological information of fishes., Spring summer flood (SSF) events are highlighted in red
FIGURE 7 in Commercial fisheries in a mega unregulated floodplain river: Assessment of the most favourable hydrological conditions for its preservation
FIGURE 7 Association of sizes range of landed and measured commercial fishes with the most significant hydroclimatic variables during different hydrological conditions recorded along the studied period. (a) Argentine National Institute of Limnology (INALI) 1965–1967, 1978–1979, 1984–1985, 1992–1994; (b) Laboratory of Hydroecology (LH) (2009–2011, 2013–2015)
FIGURE 2 in Commercial fisheries in a mega unregulated floodplain river: Assessment of the most favourable hydrological conditions for its preservation
FIGURE 2 Cluster analysis of flow regime in the study period (1920–2016) using 18 hydroclimatic variables; spring summer flood (SSF) events are highlighted in red
FIGURE 8 in Commercial fisheries in a mega unregulated floodplain river: Assessment of the most favourable hydrological conditions for its preservation
FIGURE 8 Schematic representation of interannual variation of maximum water levels (Hmax; 1935–2016) showing the influence on fish catches of hydroclimatic fluctuations (humid–dry periods). Note higher fish catches after largest spring– summer flood (SSF; ()) events (Hmax> 4.5 m at Sate Fe Port gauge). Probability of anthropic influence was indicated with lines of distinct thickness. WL: water level. () Higher fish catches, () El Nino (ENSO), () Historial disconnection event, () Larger SpringSummerFlood
FIGURE 4 in Commercial fisheries in a mega unregulated floodplain river: Assessment of the most favourable hydrological conditions for its preservation
FIGURE 4 Distance-based redundancy analysis (dbRDA) of year-to-year differences in commercial fish catches in the middle Paraná River from 1935 to 2016 explained and structured by flow regime variables: fisheries data from (a) PPARG, Producción Pesquera Argentina; (b) PPSF, Ministerio de Producción, Sub-directorate General of Ecology of Santa Fe Province; (c) INALI, Argentine National Institute of Limnology; (d) LH, Laboratory of Hydroecology
The response of nitrogen transformation to hydrological regime at sediment-water interface of seasonal lakes in floodplain: Insights from the Three Gorges Dam-Poyang Lake system
<p><span>This study establishes a coupled model integrating hydrodynamics and nitrogen transformation to elucidate the impacts of the hydrological regime of the Yangtze River after the operation of Three Gorges Dam.</span></p>
Impact of water resources development on connectivity and primary productivity across a tropical river floodplain
<p>1. Floodplain wetlands provide an important subsidy for riverine food webs as sites of high algal production. However, this subsidy depends on the degree of landscape connectivity during flood pulses, which provides the opportunity for movement of higher order consumers between rivers and floodplains to access these productive habitats. Changes in floodplain inundation extent and duration, due to variable wet season flows or water resources development (WRD), can impact landscape connectivity and ultimately the magnitude of the food web subsidy.</p> <p>2. We explored landscape connectivity using graph theory and derived four new metrics to measure how different flow scenarios can affect connectivity and algal production. We considered a historic scenario with the present level of water resource development in our study area, the Mitchell River, and a WRD scenario with the inclusion of three new dams in the catchment. We generated 240 unique daily spatial graphs, using surface water inundation maps across 40-day flood events to compare a dry year (2006), an average flow year (2001), and a wet year (2009) with and without a WRD scenario.</p> <p>3. Drier years and WRD scenario resulted in floodplain fragmentation, potentially constraining the movement of higher order consumers. Changes in connectivity due to WRD resulted in predicted reductions of up to 26% of algal production on the floodplain that was otherwise connected to the main river channels.</p> <p>4. Synthesis and applications. The approach developed in this study provides new metrics to identify how changes in floodplain surface water extent due to water resource development and climatic variation may impact ecosystem function such as connectivity that facilitates access of higher order consumers to primary production in floodplain wetlands. With a direct link to river flow alteration, these metrics can inform catchment planning and management to ensure that the conservation of floodplain ecosystem functions is adequately considered in water resource management decisions.</p>
Increased artificiality trend driven by an inter-basin water transfer on the Zayandeh-rud River floodplain
<p><strong>Khosro Fazelpoor</strong>: contributed to the design and implementation of the research, Formal analysis and to the writing of the manuscript, <strong>Vanesa Martínez- Fernandez</strong>: contributed to the design and implementation of the research, Formal analysis and to the writing of the manuscript, <strong>Saleh Yousefi</strong>: contributed to the design and implementation of the research, Formal analysis and to the writing of the manuscript, <strong>Diego García de Jalon</strong>: contributed to the design and implementation of the research, Formal analysis and to the writing of the manuscript.</p>
List of benthic macroinvertebrate taxa from the upper Paraná River floodplain: summarizing information from a literature search
<p>We created a checklist of benthic macroinvertebrates taxa found in the environments of the upper Parana River floodplain according to the information found in published articles. The checklist data presents the taxa list, the substrate type, the environment type, and the year that each taxon was initially recorded for the region. We searched for data on aquatic macroinvertebrates recorded in the upper Paraná River floodplain by reviewing published articles and reports (grey literature). We took data from an extensive literature search at the ISI Web of Knowledge, SciELO, and Scopus websites, using the keyword combination “upper Paraná River” or “Paraná River” and “floodplain” or “wetland” and “macroinvertebrate*” for the search. We selected articles published between 1990 and 2020. We selected the articles following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) model (Liberati et al., 2009) and considered the selection in four steps: (1) the country of the study, (2) the title, (3) the abstract, and (4) the full text. The selection of papers followed some eligible parameters such as type of organisms, study area, and the presence of taxa data. During the selection, we excluded macroinvertebrates recorded as parasites or those found in studies of vertebrate feeding habits. Articles that contained these two criteria were excluded from the analyses. The articles that remained were analysed regarding the type of substrate where the macroinvertebrates were recorded (i.e., sediment, macrophytes, or artificial substrates), type of environment where each taxon was found (i.e., lentic or lotic environment), and the year in which each taxon was recorded for the first time in the upper Paraná River floodplain.</p>
Bathymetric and surface digital model of the river-floodplain system corresponding to the Duero river reach between Toro and Zamora (Castilla y León).
<p>Digitally edited digital model to represent correctly and with hydraulic criteria the bridges, weirs, dips, roads and walls present in the area.</p>
Bathymetric and terrain digital model (representative of the geomorphological reference condition) of the river-floodplain system corresponding to the Douro reach between Toro and Zamora (Castilla y León).
<p>Digitally edited digital model to represent the previous geomorphological situation in the Toro-Zamora section.</p>
Distribution. NE South Africa, known only from three small, widely separated locations: Bronberg Ridge area in SE Pretoria, Gauteng Province (18 sites), Nylsvley Nature Reserve and surrounding farms on Nyl floodplain in Modimolle district, Limpopo Province (9 sites), and near Pretoriuskop Camp, Fayi area (Macili and Machulwane), and Numbi Gate in SW Kruger National Park, Mpumalanga Province (4 sites). in Chrysochloridae
Distribution. NE South Africa, known only from three small, widely separated locations: Bronberg Ridge area in SE Pretoria, Gauteng Province (18 sites), Nylsvley Nature Reserve and surrounding farms on Nyl floodplain in Modimolle district, Limpopo Province (9 sites), and near Pretoriuskop Camp, Fayi area (Macili and Machulwane), and Numbi Gate in SW Kruger National Park, Mpumalanga Province (4 sites).
Data and scripts used to produce figures presented in: Scott et al. (2019) "Floodplain inundation spectrum across the United States"
<p>This repository contains the data and scripts used to produce figures presented in: Scott et al. (2019) <strong>"Floodplain inundation spectrum across the United States"</strong> under review in Nature Communications.</p> <p>The code is hosted in the GitHub repository:</p> <p><a href="https://github.com/gomezvelezlab/floodplainInundationCONUS">https://github.com/gomezvelezlab/floodplainInundationCONUS</a></p> <p> </p>
Dataset on abiotic conditions, diversity of different taxa and connectivity indices for a floodplain case study in Austria
Open the record for dataset details and reuse information.
FIGURES 24–29 in Cymbopleura laszlorum spec. nov. (Cymbellaceae, Bacillariophyceae), a glacial relic from a calcium-rich floodplain fen in southwestern Montana, USA
FIGURES 24–29. SEM images of Cymbopleura laszlorum spec. nov. 24–26. External valve views. 27–29. Internal valve views. Scale bars: 24, 27 = 5 μm; 25, 26, 28, 29 = 1 μm.
FIGURES 3–23 in Cymbopleura laszlorum spec. nov. (Cymbellaceae, Bacillariophyceae), a glacial relic from a calcium-rich floodplain fen in southwestern Montana, USA
FIGURES 3–23. Transapically symmetric species of Cymbopleura with central fasciae and closely-spaced striae. 3–12. Cymbopleura laszlorum spec. nov. 3–9. Specimens from the type locality. Holotype specimen is in Fig. 5. 10–12. Specimens from the paratype locality. 13–19. Cymbopleura stauroneiformis. 13–15, 18, 19. Various tundra locations along the Back, Coppermine and Hood River corridors, Nunavut, Canada. 16, 17. Wet grassy meadow near Granite Gorge, Clearwater River, northern Saskatchewan, Canada. 20. Cymbopleura geofriedana from September Mountains Lake, Coppermine River corridor, Nunavut, Canada. 21. Cymbopleura sp. "Kasachstan" (Krammer 2003: 87, pl. 98, fig. 24). Photo by H. Lange-Bertalot. 22. Cymbopleura sp. "Messikommer" (Krammer 2003: 87, pl. 98, fig. 23). 23. Cymbopleura tynnii from wet hummocks near the Baillie River, Nunavut, Canada. Scale bars = 10 μm.
FIGURE 2–23 in Two new diatom species (Bacillariophyceae) from Brazilian floodplain: Actinella hermes-moreirae sp. nov. and Gomphonema mutunensis sp. nov.
FIGURE 2–23. Actinella hermes-moreirae sp. nov. LM. Valve view from type material. Scale bar = 10 μm.
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