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Water temperature in the hidden, subglacial lake at Uruguay Island, Antarctic Peninsula region, 2020-2021, and additional data sets.
The dataset contains temperature measurements in a small subglicer (hidden) lake of Antarctic Peninsula region at several levels of depth. The measurements cover almost a full year and provide an understanding of the temperature and hydrological regime of the water body. Weather measurement data and statistics is provided additionally.
Effect of salt water intrusion on the distribution of invertebrates in a GA tidal freshwater marshes from the GCE Seawater Addition Long-Term Experiment (SALTEx) project.
To characterize the effect of persistent and episodic salt water intrusion on the distribution of common freshwater marsh invertebrates, we monitored the density of adult and juvenile fiddler crabs and snails. Prior to the start of salt water addition treatments, we collected data on the distribution of crabs and snails in all 30 experimental plots (6 replicates of 5 treatments: pressed salt water addition, pulsed salt water addition, fresh water addition, procedural control structure, and control no structure). In each experimental plot, we counted the number of adult and juvenile fiddler crab burrows and snails visible on the marshs surface in a 50cm x 75cm plot (juvenile fiddler crabs were counted in only half of this area) that was positioned in the Northeastern corner of each experimental plot. Initial data was collected in March 2014. A Bentho Torch was used to measure the concentrations of cyanobacteria, diatoms, and green algae on the marsh surface in 2015 and 2016.
Continuous groundwater well temperature, salinity and water level measurements at the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx) site from May 2014 to February 2018
The Georgia Coastal Ecosystems LTER Seawater Addition Long-Term Experiment (SALTEx) is a large-scale field experiment designed to simulate saltwater intrusion in a tidal freshwater wetland to predict how chronic (Press) and acute (Pulse) salinization will affect this and other tidal freshwater ecosystems. In order to characterize groundwater salinity, temperature, and plot flooding following experimental manipulation, unvented water pressure, temperature and conductivity were continuously measured in a PVC groundwater well installed at the SALTEx site. Measurements were made at the bottom of the well using a submerged Schlumberger CTD-Diver logger every 15 minutes from 30-May-2014 to 14-Feb-2018. In February 2016 a second CTD-Diver was deployed near the top of the well. Data were downloaded from the loggers using Diver Office communication software, then imported into MATLAB for post-processing, quality control and documentation. Raw, unvented pressure readings were corrected for atmospheric pressure and sensor height from the bottom of the well to generate corrected pressure readings, then water level, salinity and density were calculated from the measured variables using UNESCO algorithms. These data were collected as part of the Georgia Coastal Ecosystems LTER SALTEx project (http://gce-lter.marsci.uga.edu/public/app/send_project_eml.asp?id=73), and will be updated annually.
Mangrove soil phosphorus addition experiment from July 2013 to August 2013 at the mangrove peat soil mesocosms (FCE), Key Largo, Florida - Nutrients in Surface Water and Aboveground Biomass
Sea levels in South Florida are conservatively predicted to rise by 0.60 m by 2060. The key mechanisms that maintain coastal peatland elevation against increasing sea level are organic matter accumulation via plant production and mineral sedimentation rates (Smoak et al. 2013). Although coastal mangrove soils are regularly inundated with seawater, little is know about the drivers of carbon sequestration (above or below ground) versus atmospheric efflux under different conditions of salinity and elevated phosphorus (P) associated with sea-level rise and storm surge. A recent study using mangrove peat soils found that seawater inundation reduced soil carbon efflux losses and salinity concentration had little effect on carbon retention or loss pathways. The next logical steps are to understand how plant-soil interactions affect above and below ground carbon processes, as well as how increases in P associated with storm surge from the Gulf of Mexico will influence physical, chemical and biological components of mangrove soils that are associated with above and belowground carbon processes. We will manipulate P in inundated peat soil mesocosms with disturbed and undisturbed red mangrove (Rhizophora mangle) seedlings to identify some of the fundamental mechanisms of soil elevation and carbon cycling given expected increases in seawater-based P availability in South Florida coastal mangroves.
Stable isotope and conservative tracer data used to estimate uptake of stream water dissolved organic carbon (DOC) through a whole-stream addition of a ¹³C-DOC tracer coupled with laboratory measurements of bioavailability of the tracer and stream water DOC using lability profiling with bioreactors
We performed a whole-stream addition of a ¹³C-DOC tracer and made laboratory measurements of the biological availability of the tracer as well as stream water DOC. The study was performed in October 2002 in a 1.27 km stretch of the third-order White Clay Creek in southeastern Pennsylvania. The tracer was prepared as a cold-water leachate of ¹³C-labeled tulip poplar saplings and it was added to the stream along with sodium bromide, a conservative tracer, over a 2-h period. Stream water samples were collected at 8 downstream stations over an 8-h period, filtered, and analyzed for concentrations of bromide and DOC. DOC was measured by Pt-catalyzed, persulfate oxidation, Br- was analyzed by ion chromatography, and C isotope samples were rotary evaporated, acidified, lyophilized, combusted, and the CO₂ analyzed with an elemental analyzer interfaced with an isotope ratio mass spectrometer. Lability profiling of the ¹³C-DOC tracer and stream water DOC were performed with a series of plug-flow bioreactors of increasing empty-bed contact times with the concentration of biodegradable DOC operationally defined as the difference between the DOC concentrations in the influent and effluent waters of the bioreactors. The bioreactor measurements were performed 2 days after the whole-stream release. Data were analyzed to estimate the uptake of stream water DOC associated with labile and semi-labile fraction of biodegradable DOC. These data have been previously used in a 2008 publication in Freshwater Biology, doi:10.1111/j.1365-2427.2007.01941.x.
Operating diagram of larvae hatching module, this installation was used to determine the optimum larvae load during the rearing process and provided additional space for rearing several thousand larvae. It consists of nine 20-litre tanks with a glass panel along the front. They are fitted with an inlet supplying filtrated water at a rate of 100 l/h and an individual air inlet. in Reproduction of Zingel asper (Linnaeus, 1758) in controlled conditions: an assessment of the experiences realized since 2005 at the Besançon Natural History Museum
Operating diagram of larvae hatching module, this installation was used to determine the optimum larvae load during the rearing process and provided additional space for rearing several thousand larvae. It consists of nine 20-litre tanks with a glass panel along the front. They are fitted with an inlet supplying filtrated water at a rate of 100 l/h and an individual air inlet.
Рис. 5. Дополнительные структуры, служаЩие укреплению Замочного краЯ и раковины у Laternula elliptica: А – дополнительнаЯ поддерживаюЩаЯ пластинка прикрывает макушечную Щель; Б – утолЩение ранее поврежденного краЯ раковины; В – пример воЗникновениЯ двух поддерживаюЩих пластинок. ОбоЗначениЯ: мщ – макушечнаЯ Щель; хр – хондрофор; ппЛ – поддерживаюЩаЯ пластинка; дпЛ – дополнительные пластинки; уКр – утолЩениЯ Задне-дорсального краЯ и краЯ сифонального ЗиЯниЯ. Fig. 5. Additional structures serving for consolidation of hinge margin and for restoration of shell edge in Laternula elliptica: А – the umbonal crack covered by additional buttress; Б – thickening of damaged edge; В – appearance of two supporting plates. Notes: мщ – umbonal crack; хр – chondrophore; ппЛ – buttress; дпЛ – additional supporting plate; уКр – thickening of posterior-dorsal margin. in Species of warm-water origin Laternula elliptica (King, 1832) (Mollusca: Bivalvia: Laternulidae), a widespread mollusk in recent Antarctica
Рис. 5. Дополнительные структуры, служаЩие укреплению Замочного краЯ и раковины у Laternula elliptica: А – дополнительнаЯ поддерживаюЩаЯ пластинка прикрывает макушечную Щель; Б – утолЩение ранее поврежденного краЯ раковины; В – пример воЗникновениЯ двух поддерживаюЩих пластинок. ОбоЗначениЯ: мщ – макушечнаЯ Щель; хр – хондрофор; ппЛ – поддерживаюЩаЯ пластинка; дпЛ – дополнительные пластинки; уКр – утолЩениЯ Задне-дорсального краЯ и краЯ сифонального ЗиЯниЯ. Fig. 5. Additional structures serving for consolidation of hinge margin and for restoration of shell edge in Laternula elliptica: А – the umbonal crack covered by additional buttress; Б – thickening of damaged edge; В – appearance of two supporting plates. Notes: мщ – umbonal crack; хр – chondrophore; ппЛ – buttress; дпЛ – additional supporting plate; уКр – thickening of posterior-dorsal margin.
Рис. 6. Ювенильные раковины Laternula elliptica: А1, А3 – левые створки, внешний вид, H×L=3.0×4.4 мм; А2 – вид со стороны дорсального краЯ на сдвоенные створки, обраЗуюЩие по Заднему краю ЗиЯние; А4 – Замок, соединЯюЩий фрагменты раЗрушенных створок (штриховка); Б1 – праваЯ створка, внешний вид, H×L=8.5×14.0 мм; Б2 – внутреннЯЯ поверхность правой створки. Фрагменты раковины вЗрослого моллюска (L=69.7 мм): В1 – вид со стороны дорсального краЯ; В2 – фрагмент правой створки, вид сбоку. ОбоЗначениЯ: ЗК – Задний край; дК – дорсальный край; сКп – складки периостракума; м – макушка; мщ – макушечнаЯ Щель; пр – продиссоконх; хр – хондрофор; ппЛ – поддерживаюЩаЯ пластинка; дпЛ – дополнительнаЯ пластинка; син – синус. Fig. 6. Juvenile shells of Laternula elliptica: A1, A3 – left valves, external view, H×L=3.0×4.4 mm; A2 – paired valves, dorsal view, showing gape through which the siphon project; A4 – hinge with chondrophore and buttress, internal view; Б1– right valve, external view, H×L=8.5×14.0 mm; Б2 – right valve, internal view. Adult shell (L=69.7 мм): B1 – fragment of right valve, dorsal view; B2 – fragment of right valve, lateral view on umbo. Notes: ЗК – posterior margin; дК – dorsal margin; сКп – periostracal wrinkles; м – umbo; мщ – umbonal crack; пр – prodissoconch; хр – chondrophore; ппЛ – buttress; дпЛ – additional supporting plate; син – sinus. in Species of warm-water origin Laternula elliptica (King, 1832) (Mollusca: Bivalvia: Laternulidae), a widespread mollusk in recent Antarctica
Рис. 6. Ювенильные раковины Laternula elliptica: А1, А3 – левые створки, внешний вид, H×L=3.0×4.4 мм; А2 – вид со стороны дорсального краЯ на сдвоенные створки, обраЗуюЩие по Заднему краю ЗиЯние; А4 – Замок, соединЯюЩий фрагменты раЗрушенных створок (штриховка); Б1 – праваЯ створка, внешний вид, H×L=8.5×14.0 мм; Б2 – внутреннЯЯ поверхность правой створки. Фрагменты раковины вЗрослого моллюска (L=69.7 мм): В1 – вид со стороны дорсального краЯ; В2 – фрагмент правой створки, вид сбоку. ОбоЗначениЯ: ЗК – Задний край; дК – дорсальный край; сКп – складки периостракума; м – макушка; мщ – макушечнаЯ Щель; пр – продиссоконх; хр – хондрофор; ппЛ – поддерживаюЩаЯ пластинка; дпЛ – дополнительнаЯ пластинка; син – синус. Fig. 6. Juvenile shells of Laternula elliptica: A1, A3 – left valves, external view, H×L=3.0×4.4 mm; A2 – paired valves, dorsal view, showing gape through which the siphon project; A4 – hinge with chondrophore and buttress, internal view; Б1– right valve, external view, H×L=8.5×14.0 mm; Б2 – right valve, internal view. Adult shell (L=69.7 мм): B1 – fragment of right valve, dorsal view; B2 – fragment of right valve, lateral view on umbo. Notes: ЗК – posterior margin; дК – dorsal margin; сКп – periostracal wrinkles; м – umbo; мщ – umbonal crack; пр – prodissoconch; хр – chondrophore; ппЛ – buttress; дпЛ – additional supporting plate; син – sinus.
Fig. 2 in Taxonomic study on bryozoans - new additions to the Korean fauna and new species of Petraliella from Seogwipo waters of Jeju Island
Fig. 2. Hiantopora intermedia (Kirkpatrick, 1890). A. zooids. B. orifice and avicularia. C. ovicell. D. basal surface. Scale bars: 100 μm (AD).
Fig. 1. A in Taxonomic study on bryozoans - new additions to the Korean fauna and new species of Petraliella from Seogwipo waters of Jeju Island
Fig. 1. A map showing the collection sites in Seogwipo waters. 1. Seongsanpo. 2. Supseom. 3. Geomeunyeo (underwater cave). 4. Munseom Island, Hangaechang in Munseom Island and Saeggi Island in Munseom Island. 5. Seogwipo port. 6. Beomseom Island and Saeggi Island in Beomseom Island. 7. Hwasun port. 8. Marado Island. 9. Moseulpo.
Fig. 3 in Taxonomic study on bryozoans - new additions to the Korean fauna and new species of Petraliella from Seogwipo waters of Jeju Island
Fig. 3. Gregarinidra serrata (MacGillivray, 1869). A. zooids. B. avicularium. C. shape of spines. D. lateral wall. Scale bars: 100 μm (AD).
COMMENTS.— Although not breeding in the Mediterranean, the species forages in Libyan waters (van Dijk et al. 2014). In addition to the single beached record, an individual was pulled from nearshore waters of the Tajura coast in 1996 and died in the rehabilitation facility of the Marine Biology Research Centre (MBRC) at Tajura, where it was subsequently taxidermied at the MBRC Museum (Hamza 2010). Capra's (1949) records were based on a report in "L'Idea Coloniale" for 2 May 1927 (Mongàr) and an unspecified specimen in the Museo Civico di Storia Naturale di Trieste (Sella). IUCN THREAT STATUS.— Vulnerable A2bd. MAP 3. Distribution of Dermochelys coriacea in Libya showing stranding site records. in Atlas of the Reptiles of Libya
COMMENTS.— Although not breeding in the Mediterranean, the species forages in Libyan waters (van Dijk et al. 2014). In addition to the single beached record, an individual was pulled from nearshore waters of the Tajura coast in 1996 and died in the rehabilitation facility of the Marine Biology Research Centre (MBRC) at Tajura, where it was subsequently taxidermied at the MBRC Museum (Hamza 2010). Capra's (1949) records were based on a report in "L'Idea Coloniale" for 2 May 1927 (Mongàr) and an unspecified specimen in the Museo Civico di Storia Naturale di Trieste (Sella). IUCN THREAT STATUS.— Vulnerable A2bd. MAP 3. Distribution of Dermochelys coriacea in Libya showing stranding site records.
Figure 4 in Addition of three Ascidian species to Indian waters from Andaman and Nicobar Islands
Figure 4. Microcosmus bitunicatus Monniot & Monniot, 2001. a. Preserved specimen. b. Double test. c. Dorsal tubercle. d. Branchial sac with folds. e. Gut loop and gonad in the body wall. f. Opening of gonad. (Abbreviation: DL: Dorsal Lamina, DT: Dorsal Tubercle, E: Endostyle, G: Gonad, GL: Gut loop, GO: Opening of Gonad, L: Liver, S: Stomach, T1: First Tunic/Outer tunic, T2: Second Tunic, each number is denoting each branchial fold), (Scale: c– 1mm; f– 5mm, 7.80x).
Figure 3. Cnemidocarpa hemprichi Hartmeyer, 1916 in Addition of three Ascidian species to Indian waters from Andaman and Nicobar Islands
Figure 3. Cnemidocarpa hemprichi Hartmeyer, 1916: a. Preserved specimen. b. Branchial sac with folds. c. branchial tentacles. d. Dorsal tubercle. e. Gut loop on the left side of the body along with gonad. f. Stomach. (Abbreviation: DL: Dorsal Lamina, DT: Dorsal Tubercle, E: Endostyle, EC: Endocarp, G: Gonad, S: Stomach, each number denoting each branchial fold), (Scale: b– 2mm, 9.08x; c– 1mm; d– 500μm, 42.7x; e– 2mm, 13.5x; f– 1mm, 27.2x).
Figure 2 in Addition of three Ascidian species to Indian waters from Andaman and Nicobar Islands
Figure 2. Polycarpa reniformis (Sluiter, 1904): a. Preserved specimen. b. Dorsal tubercle. c. Branchial sac with branchial folds. d. Stigmata. e. Gut loop on the left side of the body along with gonads. f. Gonads. (Abbreviation: DL: Dorsal Lamina, DT: Dorsal Tubercle, E: Endostyle, EC: Endocarp, G: Gonad, GL: Gut loop, ST: Stigmata, each number is denoting each branchial fold), (Scale: b– 1mm, 28.4x; c– 2mm, 11x; d– 500μm, 37.2x; e– 5mm, 7.80x; f– 1mm, 28x).
Figure 1-5. Scirtes oblongus. 1 in More new distribution records for Florida water beetles (Coleoptera: Dytiscidae, Elmidae, Hydrophilidae, Scirtidae), with additional notes on Scirtes oblongus Guérin-Méneville
Figure 1-5. Scirtes oblongus. 1) Immaculate form, Palm Beach County, FL. 2) Vittate form, Highlands County, FL. 3) Broadly striped form, Vera Cruz, Mexico. 4) Hind coxae, vittate form, Palm Beach County, (margins emphasized). 5) Male genitalia, Havana, Cuba.
Data from: Additive effects of developmental acclimation and physiological syndromes on lifetime metabolic and water loss rates of a dry-skinned ectotherm
<p>Data sets from the paper: "Additive effects of developmental acclimation and physiological syndromes on lifetime metabolic and water loss rates of a dry-skinned ectotherm" by Dezetter et al. in Functional Ecology.</p> <p> </p> <p> </p>
Water limitation drives species loss in grassland communities after nitrogen addition and warming
Open the record for dataset details and reuse information.
Pore Water Concentrations of Nitrogen From N-Addition Plots in an Alberta Peatland, 2011-2015
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a bog near Mariana Lakes, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). We collected surface pore water from all plots several times a year throughout the 5 year experiment. Porewater NH4 +-N, NO3 --N, and DON concentrations were unaffected by N input in any of the five years (rmANOVA; p = 0.44, 0.37, and 0.82, respectively). We hypothesized that as N deposition increases to a level that exceeds the capacity of the bog vegetation to take up N, net N mineralization in surface peat would be inhibited by higher NH4 +-N availability, net nitrification would be stimulated by higher NH4 +-N availability, and concentrations of DIN in porewater at the top of the water table would increase, as DIN bypasses interception by the ground layer vegetation. None of these hypotheses was supported with nitrogen being immediately taken up by vegetation. It is unclear if longer term study would reveal similar responses.
Pore water concentrations of Nitrogen from N-Addition plots in an Alberta Poor Fen, 2011-2015
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a poor fen near Mariana Lake, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). We collected surface pore water from all plots several times a year throughout the 5 year experiment. Over the 5 years of the study, porewater NH4+-N, NO3--N, and DON concentrations at the top of the poor fen water table were unaffected by N addition (p = 0.06, 0.30, 0.16, respectively). However, porewater NH4+-N, NO3--N, and DON concentrations were substantially higher in 2011 than in 2012-2015 (Fig. 11). Water addition alone had no significant effect on porewater concentrations of NH4+-N, NO3--N, or DON (p > 0.99). We hypothesized that as N deposition increases to a level that exceeds the capacity of the fen vegetation to take up N, net N mineralization in surface peat would be inhibited by higher NH4+-N availability, net nitrification would be stimulated by higher NH4+-N availability, and concentrations of DIN in porewater at the top of the water table would increase, as DIN bypasses interception by the ground layer vegetation. None of these hypotheses was supported with nitrogen being immediately taken up by vegetation. It is unclear if longer term study would reveal similar responses.
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Allen Brain Atlas
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