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107 results for “mudflat”
Migratory shorebird habitat use, diet, and prey selection on mudflats in the Virginia barrier island and lagoon system, 2023-2024
Migratory shorebirds require access to heterogenous resources during migration. Understanding how shorebirds utilize different foraging substrates and food resources across the coastal landscape is important for informing conservation. We compared shorebird habitat use and invertebrate prey communities between barrier island and mudflat foraging substrates. We counted shorebirds and collected prey samples at random points on sand, peat, and mudflat substrates during spring migration (May 14 - June 2), 2023 - 2024. We opportunistically collected fecal samples on mudflats in our study area and used fecal DNA metabarcoding with 18S (invertebrates) and 23S (biofilm) primers to describe the diets of dunlin (Calidris alpina), red knots (Calidris canutus rufa) and semipalmated sandpipers (Calidris pusilla). We then used network null modeling to determine if our focal species were selectively consuming invertebrates on mudflats. Peat banks were the most heavily used intertidal substrate and mudflats supported similar shorebird abundances and species richness to sand. Dunlin and semipalmated sandpipers were more abundant on peat and mudflats, while red knots were more abundant on sand and peat. Invertebrate density was highest on peat banks and similar between mudflat and sand substrate, though mudflats supported a more diverse prey community. Amphipod crustaceans, blue mussels (Mytilus edulis), and polychaete worms were main prey consumed by all species on mudflats. Dunlin and semipalmated sandpipers fed primarily on crustaceans whereas red knots mainly fed on bivalves. All species consumed biofilm and a high proportion of diatoms were observed in fecal samples collected from semipalmated sandpipers. Red knots and dunlin selectively consumed bivalves on mudflats while semipalmated sandpipers showed no dietary preferences. Managing staging sites to preserve a diversity of intertidal habitats is critical for meeting the variable foraging requirements of migratory shorebirds.
Audio and Water Movement Data for Oyster Reef and Mudflat Sites on the Coast of Virginia, 2018
Paired marine audio soundscape recordings with concurrent acoustic Doppler velocimeter (ADV) turbulence measurements at three intertidal sites: a natural oyster reef, a restored oyster reef, and a bare mudflat. The objective was to establish the link between oyster reef soundscapes and hydrodynamics, specifically the role that turbulence plays in generating near field pressure waves that may be used as physical cues by oyster larvae when initiating settlement behaviors. Data were collected at three different locations, with water turbulance measurements at rates up to 25Hz concurrent with audio recording.
Consumption rates of tethered live and dead pinfish and dried squid in mudflat and seagrass habitats in the Upper Laguna Madre in 2018.
These data were recorded during surveys of a tethering experiment conducted on June 7, 2018, during which 180 tethered prey were deployed in two habitat types (seagrass and mudflat) in the Upper Laguna Madre, Texas, USA (27.544006, -97.285912). In each habitat, the following prey types were deployed: squidpops (1 cm2 discs of dried squid (Duffy et al. 2015) attached to 5 cm tethers, n=50), live (n=20) and dead (n=20) pinfish (Lagodon rhomboides, 4 cm fork length, attached to 20 cm tethers) at midday in each habitat. The presence/absence of tethered prey on each stake was observed and recorded after 1 hour and 24 hours. The rate of decay (i.e., disappearance or consumption rate of tethered prey over time) was calculated as the slope of an exponential model fit to discrete observations of the presence/absence of tethered prey over time. Additional environmental variables (temperature, salinity) were also recorded at the site.
Sediment temperature at three depths below sediment surface in intertidal mudflats in Virginia, 2013-2014
We logged the sediment temperature at three intertidal mudflat sites between September, 2013 and September, 2014. At each site, three submersible temperature loggers (HOBO Pendant UA-002; Onset Computer Corporation) were buried at 3 cm, 10 cm and 20 cm below the sediment surface. Temperature was recorded in ten minute intervals. Each site was unvegetated with muddy sediment. For sites 1 and 2, data was recorded in two time series. Time series 1 from 09/02/2013 - 12/16/2013 and time series 2 from 12/19/2013 - 09/18/2014. At site 2, 20 cm depth, no data was recorded after 12/16/2013. At site 3, data was recorded at all depths continuously from 09/2/2013 to 08/28/2014. Date and time was recorded as GMT offset by -5 hours (Eastern Standard Time).
Algal cover and biomass on the mudflats of the Virginia Coast, 2015, 2016 and 2018
In May and July of 2015 benthic macroalgae biomass was measured throughout the Virginia Coast Reserve to assess variation on intertidal mudflats, especially of Gracilaria vermiculophylla. (data table 1) In 2016, nine tidal flats were sampled for macroalgal cover, and biomass (data tables 2 and 3) Macroalgal mass were collected from 36 mudflats sites in May 2018. Eight samples collected from randomly selected points along a single 120 m transect (data table 4). Codes, full names and locations of sampling locations for the 2016 and 2018 sampling are in data table 5.
Geomorphic characteristics and algal cover for 36 tidal mudflats on the Virginia Coast
Data on sediment particle sizes, mudflat topography, and hydrologic flow-related characteristics collected for 36 mudflats. Some data were field collected while others were extracted from modeled or remotely sensed data sets. Details are included with each variable.
Fig. 6 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 6. Potamalpheops johnsoni, new species, a-k, paratype, ovigerous female (MNHN-Na 13720): a, first cheliped; b, same, carpus and chela; c, same, chela enlarged; d, same, carpus, mesial view; e, second pereiopod; f, third pereiopod; g, same, distal propodus and dactylus; h, fourth pereiopod; i, fifth pereiopod, distal articles; j, telson; k, same, posterior margin; l, female paratype (ZRC 2000.2173), telson, posterior half; m-q, same paratype as a-k: m, uropod, n, same, detail of diaeresis; o, antenna, ventral aspect; p, same, scaphocerite; q, antennule, ventro-lateral view; r-s, male paratype (from ZRC type series): r, outer antennular flagellum, s, second pleopod, appendix masculina and appendix interna. Scales: A (a, b), B (e, f, h-j, l, m, o, p), C (c, d, g, k, n, q-s), scales A, C, 0.5 mm, scale B, 1 mm.
Fig. 3 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 3. Salmoneus singaporensis, new species, holotype, probably male (a, b) and Salmoneus rostratus Barnard, ovigerous female from Phuket, Thailand (c, d): a, c, frontal region, lateral view; b, d, major chela, distal portion of palm and fingers. Scales: A (a, b), B (c, d), both scales 1 mm.
Fig. 5 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 5. Potamalpheops johnsoni, new species, a, b, paratype, ovigerous female (MNHN-Na 13720), frontal region in dorsal (a) and lateral (b) views; c, holotype, ovigerous female (ZRC 2000.2172), rostrum; d-j, paratype series, males (g-i), female (j), ovigerous females (df), variation of rostrum. Scale: 1 mm.
Fig. 7 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 7. Potamalpheops johnsoni, new species, paratype, ovigerous female (MNHN-Na 13720), a, mandible; b, maxillula; c, maxilla; d, first maxilliped; e, second maxilliped; f, third maxilliped; g, same, base; h, same, apex. Scales: A (f), B (g, h), C (a-e), A, B, 1 mm, C, 0.5 mm.
Fig. 4 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 4. Potamalpheops tigger Yeo & Ng, a-j, series of specimens from Sungei Buloh (ZRC and MNHN): a-c, frontal region of males (a, b) and ovigerous female (c); d-h, variation of rostrum in males (d-f, h) and post-ovigerous female (g); i, first cheliped, carpus and chela, inner view; j, second pleopod, appendix masculina and appendix interna; k-m, female from Darwin (NTM Cr-013092): k, frontal region, lateral view; l, first pereiopod; m, second pereiopod. Scale: 1 mm.
Fig. 9. Athanas polymorphus Kemp, a, b, male I in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 9. Athanas polymorphus Kemp, a, b, male I from Sungei Buloh (ZRC 2003.0085): a, frontal region, lateral view; b, same, dorsal view; c, smaller male (male II, same lot), frontal region, lateral view; d-m, male I: d, antennule, ventro-lateral aspect; e, antenna, dorsal view of scaphocerite; f, third maxilliped; g, same, apex; i, third pereiopod; j, fifth pereiopod; k, second pleopod; l, uropod; m, telson. Scales: A (b, d-f), B (a, c, h-m), both scales: 1 mm, g, without scale.
Fig. 12 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 12. Athanas polymorphus Kemp, first chelipeds of various specimens from Sungei Buloh: a-e, female I (ZRC 2003.0085-86): a, major cheliped; lateral view, b, same, mesial view, c, same, chela; d, minor cheliped; e, same, carpus and chela; f-i, female II (same lot): f, major cheliped; lateral view, g, same, mesial view, h, same, chela; i, minor cheliped; j, k, male III (same lot): j, major cheliped, k, same, carpus and chela; l-n, male IV (same lot): l, major cheliped, lateral view, m, same, mesial view, n, minor cheliped; o, female III (same lot): first cheliped (chelipeds symmetrical). Scales: A (a, b, d, f, g, i, j, l-o), B (c, e, h, k), both scales: 1 mm.
Fig. 11. Athanas polymorphus Kemp, male II in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 11. Athanas polymorphus Kemp, male II from Sungei Buloh (ZRC 2003.0085): a, left first cheliped, lateral view; b, same, chela, mesial view, distal palm and fingers. Scales: A (a), B (b), both scales: 1 mm.
Fig. 10. Athanas polymorphus Kemp, male I in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 10. Athanas polymorphus Kemp, male I from Sungei Buloh (ZRC 2003.0085): a, left first cheliped, mesial view; b, same, lateral view; c, right first cheliped, distal merus, carpus and chela, lateral view; d, same, mesial view. Scale: 1 mm.
Fig. 16 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 16. Athanas cf. japonicus Kubo, male from Ponggol beach, Singapore (ZRC 1979.4.6.15): a, frontal region, dorsal view; b, same, lateral view; c, telson (damaged); d-h, first cheliped: d, major cheliped, lateral view; e, same, mesial view; f, minor cheliped, lateral view; g, same, mesial view; h, same, chela fingers; i, second pereiopod; j, third pereiopod. Scale: 1 mm.
Fig. 19 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 19. Athanas japonicus Kubo, female from Arita (MNHN-Na 13764): a, frontal region, dorsal view; b, same, lateral view; c, telson; d-g, first chelipeds: d, major cheliped, mesial view; e, same, lateral view; f, same, chela; g, minor cheliped; h, second pereiopod; i, third pereiopod; j, uropod. Scale: 1 mm.
Fig. 15 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 15. Athanas cf. japonicus Kubo, male from Cooya Beach, Mossmann, Queensland (QM-W26809): a, frontal region, dorsal view; b, same, lateral view; c, telson; d-i, first cheliped: d, major cheliped, lateral view; e, same, mesial view; f, same, chela; g, minor cheliped, mesial view; h, same, lateral view; i, same, carpus and chela; j, second pereiopod; k, third pereiopod. A. cf. japonicus, female from Channel Island, Darwin (NTM Cr009968): l, frontal region, lateral view; m, first cheliped (chelipeds symmetrical); n, second pereiopod; o, third pereiopod. Scale: 1 mm.
Fig. 18 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 18. Athanas japonicus Kubo, male from Yamaguchi (MNHN-Na 13640) first chelipeds: a, major cheliped, ventro-lateral view; b, minor cheliped, lateral view; c, same, chela. Scales: A (a, b), B (c), both scales: 1 mm.
Fig. 14 in Alpheid Shrimps From The Mangroves And Mudflats Of Singapore. Part I. Genera Salmoneus, Athanas And Potamalpheops, With The Description Of Two New Species (Crustacea: Decapoda: Caridea)
Fig. 14. Athanas cf. japonicus Kubo, male (a-i, o, p) and female (j-n) from Lim Chu Kang, Singapore (ZRC 2003.0087): a, frontal region, dorsal view; b, same, lateral view; c, telson; d-n, first cheliped: d, male major cheliped, lateral view; e, same, mesial view; f, same, chela, distal palm and fingers; g, male minor cheliped, lateral view; h, same, mesial view; i, same, chela, distal palm and fingers; j, female major cheliped, mesial view; k, same, lateral view; l, same, chela, distal palm and fingers; m, female minor cheliped; n, same, carpus and chela; o, second pereiopod; p, third pereiopod. Scales: A (d, e, g, h), B (a-c, f, i-p), both scales: 1 mm.
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