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738 results for “estuaries”
Land use and land cover in communities along the Bons Sinais estuary, Mozambique
<p><span>The Bons Sinais estuary (BSE) is one of the most important estuaries in the central region of the Mozambican coast. The BSE plays an important role as main source of food and income for many people living along the estuary. The present data contain information on the land use and cover of eight communities located along the Bons Sinais estuary, Mozambique, over the time period 2019-2020. The dataset was created by drawing shape files over high-resolution satellite imagens obtained from Bing and Google Satellites. All images were analysed using QGIS software. A total of 101 shapefiles were created. These files will help local managers and researchers to better understand the human use of the natural resources and landscape, as well as to predict impacts of the community's growth on natural resources in the BSE.</span></p>
Distribution. The Guianas, N Brazil (E of the Rio Negro and N of the Rio Amazonas, also on Gurupa I in the Amazon estuary), and S Venezuela (Rio Cassiquiare to the Rio Orinoco). in Atelidae
Distribution. The Guianas, N Brazil (E of the Rio Negro and N of the Rio Amazonas, also on Gurupa I in the Amazon estuary), and S Venezuela (Rio Cassiquiare to the Rio Orinoco).
Hypoxia-induced predation refuge for northern quahogs (Mercenaria mercenaria) in a temperate estuary
<p><span><span><span><span><span><span><span><span><span><span><span>Oxygen depletion in estuaries and coastal waters is often associated with reduced biodiversity, coastal dead zones, and the loss of important ecosystem services. However, some species can benefit from low oxygen conditions due to the indirect effects these conditions have on trophic relationships. In Narragansett Bay, Rhode Island, U.S.A., northern quahogs (<i>Mercenaria mercenaria</i>) reach their highest densities in the areas of the Bay most prone to oxygen depletion. One line of evidence suggests that suboxic events (hypoxia and anoxia) can aid quahogs by excluding predators. Here, we analyze data from long-term surveys of water quality and quahog abundances to test whether a hypoxia-induced predation refuge is strong enough to explain quahog population dynamics in Narragansett Bay. We found that quahog cohorts were larger when they had been exposed to low oxygen conditions as juveniles, consistent with the predation refuge hypothesis. However, cohort size was also strongly associated with location and year settled, suggesting that a predation refuge is but one of a suite of factors influencing <i>M. mercenaria</i> populations.</span></span></span></span></span></span></span></span></span></span></span></p>
Saltmarsh Vegetation Alters the Tidal Hydrodynamics of Small Estuaries
<p>The Delft3D modelling suite is used to investigate the impact of saltmarsh vegetation on tidal dynamics and residual currents in three distinctly different estuaries in Wales, UK, in order to understand the impacts of marsh vegetation on wider estuarine hydrodynamics. The three estuaries, Mawddach, Taf and Loughor, vary in size, tidal range, exposure, and saltmarsh coverage. Tidal constituents and residual currents were calculated using a year-long simulation of tidal dynamics.</p>
Dataset in the article "Sedimentary record off the Yangtze River estuary and its response to typhoons and human activities over the past 70 years"
<p>The original data presented here is related to the article “Sedimentary record off the Yangtze River estuary and its response to typhoons and human activities over the past 70 years”</p>
Sea-surface temperature anomalies mediate changes in fish richness and abundance in Western North Atlantic and Gulf of Mexico estuaries
<p class="MsoNormal"><strong><span>Aim: </span></strong><span>Anthropogenic-driven warming of marine systems has resulted in a series of biological and physiological responses that are fundamentally altering ecosystem structure. Because estuaries exist at the land-ocean interface, they are particularly vulnerable to the effects of ocean warming as they can undergo rapid biogeochemical and hydrological shifts due to climate and land-use change. We explored how fish diversity structures—turnover, richness and abundance—have changed in the western North Atlantic and Gulf of Mexico estuaries through space and time and the drivers of change. </span></p> <p class="MsoNormal"><span><strong>Location:</strong> North Atlantic and Northern Gulf of Mexico</span></p> <p class="MsoNormal"><strong><span>Taxa</span></strong><span>: Fish</span></p> <p class="MsoNormal"><strong><span>Results:</span></strong><span> We found that species richness and abundance, turnover have increased in North Atlantic and northern Gulf of Mexico estuaries in the last 3 decades. These changes were mediated largely by sea-surface temperature anomalies, especially in more northern estuaries where warming has been relatively pronounced. </span><span>There is also an indication that urbanization, perhaps through habitat fragmentation and/or fisheries activities may be contributing to the increase in fish richness in many of these estuaries. </span></p> <p class="MsoNormal"><strong><span>Main Conclusion: </span></strong><span>The increasing trajectory of turnover in many of the estuaries suggests that the fish communities have changed fundamentally from the baselines. A fundamental change in community composition can lead to an irreversible trophic imbalance or alternative stable states among other outcomes. Thus, predicting how shifting community structures might influence food webs, ecosystem stability and human resource use remains a pertinent task.</span></p>
Distribution. SW Atlantic in SE Brazil (N to Espirito Santo State), Uruguay, and N Argentina (S to Golfo San Matias in N Patagonia); relatively common on both Uruguayan and Argentinian sides of La Plata River Estuary. The species is not continuously distributed, and there are two areas in its N distribution where it is extremely rare or absent. in Pontoporiidae
Distribution. SW Atlantic in SE Brazil (N to Espirito Santo State), Uruguay, and N Argentina (S to Golfo San Matias in N Patagonia); relatively common on both Uruguayan and Argentinian sides of La Plata River Estuary. The species is not continuously distributed, and there are two areas in its N distribution where it is extremely rare or absent.
Subspecies and Distribution. C.o.olivaceusSchomburgk,1848—mightberestrictedtotheVenezuelanAmazonBasinfromtheupperRioOrinoco,andthroughouttheOrinocosavannaabovethemouthoftheRioMeta,asfarNandWastheSierradePerijaandtheVenezuelanC.o.dela C.o. (C.o. Range), to the left bank of the Rio Essequibo in W Guyana, in forests of the Guiana Shield; distributional limits separating the two subspecies are not well known. C. o. castaneus 1. Geoffroy Saint-Hilaire, 1851 — Guianas (possibly from the Rio Essequibo in Guyana E through Suriname and French Guiana) and N Brazil, where its distributional limits are not well known but are possibly marked by the rios Negro and Branco and Catrimani (right bank affluent of the Rio Branco) in the W, the Rio Amazonas in the S, and the Atlantic coast in the E, and it also occurs on Caviana and Mexiana Is in the estuary of the Rio Amazonas. Small numbers introduced as pets are now feral on Margarita I off the Venezuelan coast. in Cebidae
Subspecies and Distribution. C.o.olivaceusSchomburgk,1848—mightberestrictedtotheVenezuelanAmazonBasinfromtheupperRioOrinoco,andthroughouttheOrinocosavannaabovethemouthoftheRioMeta,asfarNandWastheSierradePerijaandtheVenezuelanC.o.dela C.o. (C.o. Range), to the left bank of the Rio Essequibo in W Guyana, in forests of the Guiana Shield; distributional limits separating the two subspecies are not well known. C. o. castaneus 1. Geoffroy Saint-Hilaire, 1851 — Guianas (possibly from the Rio Essequibo in Guyana E through Suriname and French Guiana) and N Brazil, where its distributional limits are not well known but are possibly marked by the rios Negro and Branco and Catrimani (right bank affluent of the Rio Branco) in the W, the Rio Amazonas in the S, and the Atlantic coast in the E, and it also occurs on Caviana and Mexiana Is in the estuary of the Rio Amazonas. Small numbers introduced as pets are now feral on Margarita I off the Venezuelan coast.
Subspecies and Distribution. S.s.sciureusLinnaeus,1758—GuianasandNBrazil,NoftheAmazonRiverfromtheriosNegroandDemini(AmazonasState),Etotherivermouth,andSoftheAmazonRiverbetweentheRioXingu-Iriri(ParaState)EtotheRioPindaré(MaranhaoState),extendingStoc.6°SalongtheupperreachesoftheRioXingu. S. s. collins: Osgood, 1916 — N Brazil, Marajo I in the estuary of the Amazon River (Para State), but further studies are needed to identify the extent of its occurrence, which may well be much larger; the identity of the squirrel monkeys on other islands in the Amazon estuary (Gurupa, Caviana, and Mexiana) has yet to be ascertained. in Cebidae
Subspecies and Distribution. S.s.sciureusLinnaeus,1758—GuianasandNBrazil,NoftheAmazonRiverfromtheriosNegroandDemini(AmazonasState),Etotherivermouth,andSoftheAmazonRiverbetweentheRioXingu-Iriri(ParaState)EtotheRioPindaré(MaranhaoState),extendingStoc.6°SalongtheupperreachesoftheRioXingu. S. s. collins: Osgood, 1916 — N Brazil, Marajo I in the estuary of the Amazon River (Para State), but further studies are needed to identify the extent of its occurrence, which may well be much larger; the identity of the squirrel monkeys on other islands in the Amazon estuary (Gurupa, Caviana, and Mexiana) has yet to be ascertained.
The use of environmental DNA to monitor impacted coastal estuaries
<p>Environmental DNA (eDNA) metabarcoding is increasingly being used to assess community composition in coastal ecosystems. In this study, we chose to examine temporal and spatial changes in the aquatic community of Manly Lagoon – one of the most heavily developed and polluted estuaries in eastern Australia. Based on metabarcoding of the 16S mitochondrial gene (for fish) and the 18S nuclear gene (for macroinvertebrates), we identified seasonal differences in fish and macroinvertebrate community composition as well as species richness, which correlated, in some cases, with environmental parameters (sea surface temperature and freshwater input). Moreover, given the greater taxonomic resolution of fish versus macroinvertebrate assignments, we identified several known migratory fish species of management importance that contributed significantly to the overall patterns observed. Overall, our data support the use of eDNA metabarcoding to track fish assemblages shifting in response to environmental drivers in polluted estuaries with increased sampling and consultation with historical data.</p>
FIGURE. Landscapes and vegetation types at Quiçama National Park. A. Wooded savannah with Adansonia digitata. B. Mosaic of wooded savannah and thicket. C. Grassy savannah. D. Slope with thicket. E. Grassy savanna with Setaria welwitschi. F. Wooded savannah. G. Cuanza River shores with herbaceous vegetation. H. Herbaceous vegetation on the banks of the Cuanza River and slope with open forest. I. Coastal sands. J. Mangrove at the Cuanza River estuary, with Rhizophora racemosa. (Photographs by the authors). in An annotated checklist of the vascular flora of Quiçama National Park, Angola
FIGURE. Landscapes and vegetation types at Quiçama National Park. A. Wooded savannah with Adansonia digitata. B. Mosaic of wooded savannah and thicket. C. Grassy savannah. D. Slope with thicket. E. Grassy savanna with Setaria welwitschi. F. Wooded savannah. G. Cuanza River shores with herbaceous vegetation. H. Herbaceous vegetation on the banks of the Cuanza River and slope with open forest. I. Coastal sands. J. Mangrove at the Cuanza River estuary, with Rhizophora racemosa. (Photographs by the authors).
Figure 12 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 12. Guard papillae of Vignadula (A–D) and Xenostrobus (E–G) species on the posterior region of the inner mantle margin attached to LV. All animals shown preserved in ethanol. A, Vignadula atrata, SL = 11.4 mm, Toishi-ko, Nagasaki, Japan. B, Vignadula mangle comb. nov., SL = 13.5 mm, Kampong Bako, Kuching, Sarawak. C, Vignadula kuraburiensis sp. nov., SL = 13.2 mm, Kuraburi, Phangnga, Thailand. D, V. kuraburiensis sp. nov., SL = 8.8 mm, Ban Baen, Ranong, Thailand. E, Xenostrobus inconstans, SL = 22.7 mm, Dunnalley Bay, Tasmania, Australia (TMAG E21829). F, Xenostrobus securis, SL = 24.8 mm, Swan River, Perth, WA, Australia. G, Xenostrobus pulex, SL = 13.1 mm, Cottesloe, Perth, WA, Australia. Scale bars: 1 mm in A–C, E–G; 500 µm in D.
Figure 14 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 14. Type material of species that are more aligned to Limnoperna than to Xenostrobus or Vignadula. A, B, holotype of Modiolus sambasensis Dautzenberg, 1904 from Sambas River, Kalimantan, north-west Borneo (IRSN); SL = 16.2 mm. C–H, syntypes of Modiolus taprobanensis Preston, 1915 from Ceylon (Sri Lanka) (BMNH). C, D, SL = 17.5 mm. E, F, SL = 18.6 mm. G, H, SL = 18.5 mm. Abbreviations: cam, ctenidial attachment muscle scar; pam, posterior adductor muscle; pbr1, first posterior byssal retractor muscle; pbr2, second posterior byssal retractor muscle.
Figure 13 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 13. Geographical distribution of Vignadula and Xenostrobus species in East Asia, Australia and New Zealand. Locations are based on examined museum material or material collected in the field for this study by the authors, and supplemented by information contained in papers by Colgan (2017: Xenostrobus securis); Colgan et al. (2020: Xenostrobus neozelanicus and X. securis); Horikoshi & Okamoto (2007: X. securis); Iwasaki (2013: X. securis); Iwasaki & Yamamoto (2014: X. securis); Kimura (1996: Vignadula atrata); Kimura et al. (1999: X. securis [?], as Xenostrobus sp.); Lee & Morton (1985: Vignadula mangle comb. nov., as Xenostrobus atratus); Lamarck (1819: X. securis [?], as Mytilus securis; MNHN-IM-2000-34894, three syntypes); Lutaenko et al. (2019: V. atrata); Morton (1999: Xenostrobus pulex); Morton (2004: Xenostrobus inconstans); Morton & Leung (2015: X. securis); Park et al. (2017: V. atrata); Wang et al. (2011: V. atrata); Wilson (1967: Xenostrobus spp.).
Figure 11 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 11. Relationship between shell size and number of folds observed on the labial palps of four Vignadula species from East and Southeast Asia. Data from Ockelmann (1983) for Vignadula atrata, Vignadula balani and Vignadula mangle are indicated separately. Apart from data points based on the study by Ockelmann (1983) and three individuals of Vignadula kuraburiensis sp. nov., all are referable to genetically sequenced individuals based on this study.
Figure 10 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 10. Vignadula mangle (Ockelmann, 1983) comb. nov. A, numerous individuals amongst barnacles (Amphibalanus amphitrite (Darwin, 1854)) on an intertidal rocky shore at Teluk Senangin, Perak, Malaysia. Scale bar: 1 cm. B, intact living individual seen from its left, with extended inhalant (inner mantle lobes bearing simple guard papillae, gp) and exhalant (es) siphons. Scale bar: 1 mm. C, surface of posterior half of left valve (SL = 8.0 mm; specimen collected from Sembawang, Singapore) with 'special byssus secretions' (sbs), or commarginal series of thickenings or blunt serrations, sensu Ockelmann (1983). Scale bar: 500 µm. D, outer plicate gland, after removal of ctenidium. Scale bar: 1 mm. E–G, detail of the posterior region of living individuals, showing simple and branched (yellow asterisks) guard papillae. Both types of papillae can occur in the same individual, as shown in E and F. Blue and green arrows depict the direction of inhalant and exhalant currents. Scale bars: 1 mm. D, Hat Yao jetty, Trang, Gulf of Thailand. E, Teluk Batik, Lumut, Perak. B, F, G, Bangsaen Beach, Chonburi, Gulf of Thailand.
Figure 9 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 9. Type material of Vignadula mangle comb. nov. and Vignadula balani. A–D, Xenostrobus mangle Ockelmann, 1983 paratypes NHMD 916051 Jeram, Selangor, peninsular Malaysia. A, B, SL = 8.2 mm. C, D, SL = 11.0 mm. E–H, Xenostrobus balani Ockelmann, 1983 paratypes NHMD 915909 Phuket, Thailand. E, F, SL = 6.4 mm. G, LV, SL = 7.2 mm. H, LV, SL = 8.5 mm.
Figure 7 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 7. Vignadula kuraburiensis sp. nov. Sequenced specimens from western Thailand: A–H, Ban Thung La Ong in Kuraburi District, Phang-nga Province; I, J, Bang Ben Bay, Laem Son National Park, Kapoe District, Ranong Province. A, B, XTSW1; LV, SL = 12.8 mm (holotype, PMBC 25290). C, D, XTSW2; LV, SL = 13.2 mm (paratype, PMBC 25291). E, F, XTSW3; LV, SL = 12.3 mm (paratype ZRC.MOL.24068). G, H, XTSW4; RV (anterior half of ventral edge partially broken), SL = 11.5 mm (ZRC.MOL.24069). I, J, XTSW5; LV, SL = 9.0 mm (ZRC.MOL.24070). See also Clade B in Figures 1–3.
Figure 8 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 8. Vignadula atrata (Lischke, 1871). A, posterior region of living juvenile with extended mantle margins (imm) devoid of guard papillae. Blue and green arrows depict the direction of inhalant and exhalant currents. Scale bar: 500 µm. B, posterior region of ethanol-preserved sequenced individual XNJ 0519B, with left valve removed to show posterior end of ctenidium (ct), mixture of simple (marked by yellow crosses) and branched (yellow asterisks) guard papillae (gp) along the inner mantle margin (imm) and posterior adductor muscle (pam). Scale bar: 1 mm. C, living individual with numerous simple and branched guard papillae. Scale bar: ~500 µm. D, living individual with mostly simple guard papillae. Note the well-formed exhalant siphon. Scale bar: ~1 mm. A, Kagoshima, Japan. B–D, Nagasaki, Japan.
Figure 6 in Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia
Figure 6. Vignadula mangle (Ockelmann, 1983) comb. nov. Selected sequenced specimens from Malaysia (A, B), Thailand (C–H) and Taiwan (I–L). A, B, XA MYPK 0419C, Lumut, Perak (Malacca Strait); RV, SL = 6.2 mm (ZRC.MOL.24041). C, D, XBT3, Pak Meng, Trang Province, Thailand (Andaman Sea); LV, SL = 11.9 mm (ZRC.MOL.24067). E, F, XTE6, Hua Hin, Prachuap Khiri Khan Province (Gulf of Thailand); LV, SL = 10.1 mm (ZRC.MOL.24004). G, H, XM TBB 0719C, Bangsaen Beach, Chonburi Province (Gulf of Thailand); LV, SL = 9.7 mm (ZRC.MOL.24007). I, J, XTW1, Kinmen, Taiwan; LV, SL = 9.2 mm (ZRC.MOL.24033). K, L, XTW6, Kinmen, Taiwan; LV, SL = 9.5 mm (ZRC.MOL.24038). See also Clade D in Figures 1–3.
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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.
Annotated Behaviour and Observability Dataset (ABODe)
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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.