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38 results for “lowland rivers”
Indicative distribution map for Ecosystem Functional Group F1.2 Permanent lowland rivers
<p>This archive contains indicative distribution maps and profiles for <strong>F1.2 Permanent lowland rivers</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Indicative distribution map for Ecosystem Functional Group F1.7 Large lowland rivers
<p>This archive contains indicative distribution maps and profiles for <strong>F1.7 Large lowland rivers</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Indicative distribution map for Ecosystem Functional Group F1.5 Seasonal lowland rivers
<p>This archive contains indicative distribution maps and profiles for <strong>F1.5 Seasonal lowland rivers</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Supporting data for 'Hourly prediction of phytoplankton biomass and its environmental controls in lowland rivers'
<p>This dataset is used in the manuscript 'Hourly prediction of phytoplankton biomass and its environmental controls in lowland rivers' published in Water Resources Research. The dataset contains hourly observation of water quality in the lower Thames catchment, UK and were made available by the Environment Agency, UK. </p>
Рис. 1. А – р. Зарафшан в среднем течении (предгорнаЯ река); В – р. Зарафшан в ниЖнем течении (равниннаЯ река). Фото Н. РуЗикуловой, 2019 г. Fig. 1. А – the Middle Zarafshan River (submountain river); B – the Lower Zarafshan River (lowland river). Photo by N. Ruzikulova, 2019. in Patterns of ecology and life cycles of aquatic molluscs from Central Asia
Рис. 1. А – р. Зарафшан в среднем течении (предгорнаЯ река); В – р. Зарафшан в ниЖнем течении (равниннаЯ река). Фото Н. РуЗикуловой, 2019 г. Fig. 1. А – the Middle Zarafshan River (submountain river); B – the Lower Zarafshan River (lowland river). Photo by N. Ruzikulova, 2019.
Рис. 2. Низина Λевобережья НТТ в виΑе параΛΛеΛьных берегу моря ваΛов и небоΛьших понижений, вытянутых в северо-восточном направΛении, с характерной раститеΛьностью Fig. 2. The lowland of the left Bank of the LRT in the form of parallel to the seashore shafts and small depressions, elongated in a North-Eastern direction, with characteristic vegetation in Transboundary Migration And The Local Constraints In The Dynamic Of Fish Fauna In The Lower Reaches Of Tumannaya River
Рис. 2. Низина Λевобережья НТТ в виΑе параΛΛеΛьных берегу моря ваΛов и небоΛьших понижений, вытянутых в северо-восточном направΛении, с характерной раститеΛьностью Fig. 2. The lowland of the left Bank of the LRT in the form of parallel to the seashore shafts and small depressions, elongated in a North-Eastern direction, with characteristic vegetation
HOLOCENE OVERWASH OCCURRENCE AGE IN THE ISUMI RIVER LOWLAND, EASTERN BOSO PENINSULA, JAPAN
<p>Analysis of the chronological data and observation of a lagoonal sediment core reveal sand washover events between around 2.4 to 2.5 cal. ky BP in the Isumi River lowland. We conducted radiocarbon dating with AMS and constructed an age-depth model using the latest calibration curve and appropriate model routine. In the middle to lower part of the core, dark-gray sand layers are repeatedly deposited. Sand layers may exhibit an erosional surface at the base with fining upward grading. The overwash layers are composed of well-rounded sand with occasional gravel, indicative of transportation. overwash sediment characteristics are consistent with proximal marine deposits, suggesting an ocean origin (though riverine sediment is also similar in character). The age-depth model indicates very high sediment accumulation rates associated with overwash deposits. Based on the amount of accumulated sediment, relatively large scale redeposition events occurred during this period but more information is needed to constrain the mechanism(s) causing the events. We also present a local reservoir age correction compatible with the Marine20 calibration curve.</p>
Following the mixtures of organic micropollutants with in-vitro bioassays in a large lowland river from source to sea - bioassays CRC
<p>Supportive material for the submitted paper: </p> <p><strong><em><span>Following the mixtures of organic micropollutants with in-vitro bioassays in a large lowland river from source to sea </span></em></strong></p> <p><span>from Hommel et al.</span></p> <p><span>The data includes the with R automated evaluation of the AhR-CALUX, AREc32, ERa-GeneBLAzer and SH-SY5Y assay with respective plots and excel files of the concentrations response curves.</span></p>
Data from: Biogeography of curimatid fishes reveals multiple lowland-upland river transitions and differential diversification in the Neotropics (Teleostei, Curimatidae)
<p><span><span><span><span><span><span><span><span><span><span><span><span><span><span>The Neotropics harbors a megadiverse ichthyofauna comprising over 6300</span></span></span></span></span></span></span></span></span></span></span></span></span></span> <span><span><span><span><span><span><span><span><span><span><span><span><span><span>species with approximately 80% in just three taxonomic orders within the clade Characiphysi. This highly diverse group has evolved in tropical South America over tens to hundreds of millions of years influenced mostly by re‐arrangements of river drainages in lowland and upland systems. In this study, we investigate patterns of spatial diversification in Neotropical freshwater fishes in the family Curimatidae, a species‐rich clade of the order Characiformes. Specifically, we examined ancestral areas, dispersal events, and shifts in species richness using spatially explicit biogeographic and macroevolutionary models to determine whether lowlands–uplands serve as museums or cradles of diversification for curimatids. We used fossil information to estimate divergence times in BEAST, multiple time‐stratified models of geographic range evolution in BioGeoBEARS, and alternative models of geographic state‐dependent speciation and extinction in GeoHiSSE. Our results suggest that the most recent common ancestor of curimatids originated in the Late Cretaceous likely in lowland paleodrainages of northwestern South America. Dispersals from lowland to upland river basins of the Brazilian and Guiana shields occurred repeatedly across independently evolving lineages in the Cenozoic. Colonization of upland drainages was often coupled with increased rates of net diversification in species‐rich genera such as </span></span></span></span></span></span></span></span></span></span></span></span></span></span><em>Cyphocharax</em><span><span><span><span><span><span><span><span><span><span><span><span><span><span> and </span></span></span></span></span></span></span></span></span></span></span></span></span></span><em>Steindachnerina</em><span><span><span><span><span><span><span><span><span><span><span><span><span><span>. Our findings demonstrate that colonization of novel aquatic environments at higher elevations is associated with an increased rate of diversification, although this pattern is clade‐dependent and driven mostly by allopatric speciation. Curimatids reinforce an emerging perspective that Amazonian lowlands act as a museum by accumulating species along time, whereas the transitions to uplands stimulate higher net diversification rates and lineage diversification.</span></span></span></span></span></span></span></span></span></span></span></span></span></span></p>
Data from: Biogeography of curimatid fishes reveals multiple lowland-upland river transitions and differential diversification in the Neotropics (Teleostei, Curimatidae)
Open the record for dataset details and reuse information.
Data from: Spatial scaling of environmental variables improves species-habitat models of fishes in a small, sand-bed lowland river
Habitat suitability and the distinct mobility of species depict fundamental keys for explaining and understanding the distribution of river fishes. In recent years, comprehensive data on river hydromorphology has been mapped at spatial scales down to 100 m, potentially serving high resolution species-habitat models, e.g., for fish. However, the relative importance of specific hydromorphological and in-stream habitat variables and their spatial scales of influence is poorly understood. Applying boosted regression trees, we developed species-habitat models for 13 fish species in a sand-bed lowland river based on river morphological and in-stream habitat data. First, we calculated mean values for the predictor variables in five distance classes (from the sampling site up to 4000 m up- and downstream) to identify the spatial scale that best predicts the presence of fish species. Second, we compared the suitability of measured variables and assessment scores related to natural reference conditions. Third, we identified variables which best explained the presence of fish species. The mean model quality (AUC = 0.78, area under the receiver operating characteristic curve) significantly increased when information on the habitat conditions up- and downstream of a sampling site (maximum AUC at 2500 m distance class, +0.049) and topological variables (e.g., stream order) were included (AUC = +0.014). Both measured and assessed variables were similarly well suited to predict species' presence. Stream order variables and measured cross section features (e.g., width, depth, velocity) were best-suited predictors. In addition, measured channel-bed characteristics (e.g., substrate types) and assessed longitudinal channel features (e.g., naturalness of river planform) were also good predictors. These findings demonstrate (i) the applicability of high resolution river morphological and instream-habitat data (measured and assessed variables) to predict fish presence, (ii) the importance of considering habitat at spatial scales larger than the sampling site, and (iii) that the importance of (river morphological) habitat characteristics differs depending on the spatial scale.
Distribution. The Guianas (E of the Essequibo River, but excluding the lowland coastal plains) and NE Brazil (N of the Rio Amazonas and E of the rios Negro and Branco); its occurrence W of the Essequibo and in Venezuela is doubtful. in Atelidae
Distribution. The Guianas (E of the Essequibo River, but excluding the lowland coastal plains) and NE Brazil (N of the Rio Amazonas and E of the rios Negro and Branco); its occurrence W of the Essequibo and in Venezuela is doubtful.
Subspecies and Distribution. C. p. pygmaea Spix, 1823 — Upper Amazon in S Colombia, W Brazil, E Ecuador, and N Peru, N of the Amazon River and left bank of the Rio Pastaza, E to the mouth of the Rio Japura, and S of the Rio Japura-Caqueta to the Andes. C. p. niverventris Lonnberg, 1940 — Amazonian lowlands and Andean foothills in W Brazil, E Peru, and N Bolivia, S of the Amazon River, E of the Rio Mayo and the Rio Huallaga above the Rio Mayo, S to the upper Rio Purus, E to N Bolivia (Rio Muyumanu), and N probably through the entire interfluvium of the rios Purus and Madeira. in Callitrichiade
Subspecies and Distribution. C. p. pygmaea Spix, 1823 — Upper Amazon in S Colombia, W Brazil, E Ecuador, and N Peru, N of the Amazon River and left bank of the Rio Pastaza, E to the mouth of the Rio Japura, and S of the Rio Japura-Caqueta to the Andes. C. p. niverventris Lonnberg, 1940 — Amazonian lowlands and Andean foothills in W Brazil, E Peru, and N Bolivia, S of the Amazon River, E of the Rio Mayo and the Rio Huallaga above the Rio Mayo, S to the upper Rio Purus, E to N Bolivia (Rio Muyumanu), and N probably through the entire interfluvium of the rios Purus and Madeira.
Distribution. Lowland forests of W Brazil, E Peru, and N Bolivia, S of the Amazon River. Because of abundance of individuals in the C. castanea complex, hampering precise species identification in the field and in collections, a detailed assessment ofits distribution is still needed. in Phyllostomidae
Distribution. Lowland forests of W Brazil, E Peru, and N Bolivia, S of the Amazon River. Because of abundance of individuals in the C. castanea complex, hampering precise species identification in the field and in collections, a detailed assessment ofits distribution is still needed.
Distribution. Bolivian lowlands (NE to the Chiquitano Mts and SW to the piedmont elevations in the subandean region) and SW Brazilian Amazon in the upper Madeira River, and the Beni, Ichilo, Marmoré, Ipurupuru, Iboré, Baré, Abuna, and Iténez (= Guaporé) rivers and their tributaries, all of which drain into the Madeira; recently also recorded below Santo Antonio falls between the cities of Porto Velho and Borba. in Iniidae
Distribution. Bolivian lowlands (NE to the Chiquitano Mts and SW to the piedmont elevations in the subandean region) and SW Brazilian Amazon in the upper Madeira River, and the Beni, Ichilo, Marmoré, Ipurupuru, Iboré, Baré, Abuna, and Iténez (= Guaporé) rivers and their tributaries, all of which drain into the Madeira; recently also recorded below Santo Antonio falls between the cities of Porto Velho and Borba.
Distribution. NE Amazonian lowlands N of the Amazon River and E of Orinoco and Rio Negro rivers in E Venezuela, the Guianas, and N Brazil. in Erethizontidae
Distribution. NE Amazonian lowlands N of the Amazon River and E of Orinoco and Rio Negro rivers in E Venezuela, the Guianas, and N Brazil.
Distribution. Lowlands of E Ecuador and NE Peru but may occur throughout most of NW Amazonia N of the Amazon River and W of the Rio Negro. in Erethizontidae
Distribution. Lowlands of E Ecuador and NE Peru but may occur throughout most of NW Amazonia N of the Amazon River and W of the Rio Negro.
Distribution. Aru Is and lowlands of S New Guinea in Merauke and Western provinces and Avera (= Avela), Aroa River,in the E; recently, two specimens were obtained in the Trans-Fly region near Serki Village. in Dasyuridae
Distribution. Aru Is and lowlands of S New Guinea in Merauke and Western provinces and Avera (= Avela), Aroa River,in the E; recently, two specimens were obtained in the Trans-Fly region near Serki Village.
Distribution. Amazonian lowlands of E Brazil S of the Amazon River, extending S to the cerrado biome in EC Brazil, primarily in the Rio Tapajos, Rio Xingu, and Rio Tocantins-Araguaia fluvial systems of Para, Maranhao, Tocantins, Minas Gerais, Goias, and Mato Grosso states. in Echimyidae
Distribution. Amazonian lowlands of E Brazil S of the Amazon River, extending S to the cerrado biome in EC Brazil, primarily in the Rio Tapajos, Rio Xingu, and Rio Tocantins-Araguaia fluvial systems of Para, Maranhao, Tocantins, Minas Gerais, Goias, and Mato Grosso states.
Distribution. NE Madagascar, extremely limited distribution in the far N of the island, just to the S of Antsiranana (= Diégo-Suarez), it was formerly believed to inhabit both dry and humid forests from the Montagne d' Ambre region S to the Mahavavy River near Ambilobe in the W, and probably to the Fanambana River S of Vohémarin the E. However, with the recognition of the Ankarana Sportive Lemur (L. ankaranensis) as a distinct species, the range of the Sahafary Sportive Lemur was reduced to a handful of very small remnant forest patches nearthe villages of Madirobe and Ankarongana in the Sahafary region, and in the immediate vicinity of Andrahona, a small mountain rising out of the surrounding lowlands about 30 km south of Antsiranana and E of the RN6 main road. Recent faunal surveys in the Montagne des Francais, a calcareous massif of c.6114 ha approximately 12 km SE of Antsiranana, listed the Sahafary Sportive Lemur as one of the species occurring there, but this needs to be confirmed; it may be widerranging than the Ankarana Sportive Lemur. in Lepilemuridae
Distribution. NE Madagascar, extremely limited distribution in the far N of the island, just to the S of Antsiranana (= Diégo-Suarez), it was formerly believed to inhabit both dry and humid forests from the Montagne d' Ambre region S to the Mahavavy River near Ambilobe in the W, and probably to the Fanambana River S of Vohémarin the E. However, with the recognition of the Ankarana Sportive Lemur (L. ankaranensis) as a distinct species, the range of the Sahafary Sportive Lemur was reduced to a handful of very small remnant forest patches nearthe villages of Madirobe and Ankarongana in the Sahafary region, and in the immediate vicinity of Andrahona, a small mountain rising out of the surrounding lowlands about 30 km south of Antsiranana and E of the RN6 main road. Recent faunal surveys in the Montagne des Francais, a calcareous massif of c.6114 ha approximately 12 km SE of Antsiranana, listed the Sahafary Sportive Lemur as one of the species occurring there, but this needs to be confirmed; it may be widerranging than the Ankarana Sportive Lemur.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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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.