keyword
MENU ▼
Read by QxMD icon Read
search

Estuary

keyword
https://www.readbyqxmd.com/read/27913016/biogenic-silica-composition-and-%C3%AE-13-c-abundance-in-the-changjiang-yangtze-and-huanghe-yellow-rivers-with-implications-for-the-silicon-cycle
#1
Xiangbin Ran, Bochao Xu, Jun Liu, Chenying Zhao, Sen Liu, Jiaye Zang
The study was carried out to address a method for separation of terrestrial and marine biogenic silica (BSi) in estuaries based on BSi compositions and δ(13)C values in BSi associated organic matter (δ(13)CBSi). We used two world-class major rivers - the Changjiang (Yangtze) and Huanghe (Yellow) Rivers as examples to illustrate our approach. Our results for these rivers indicate that riverine BSi is comprised mainly of phytoliths and diatoms. River BSi concentrations vary with terrestrial inputs and in-stream primary production...
November 29, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27912100/source-tracking-using-microbial-community-fingerprints-method-comparison-with-hydrodynamic-modelling
#2
D T McCarthy, D Jovanovic, A Lintern, I Teakle, M Barnes, A Deletic, R Coleman, G Rooney, T Prosser, S Coutts, M R Hipsey, L C Bruce, R Henry
Urban estuaries around the world are experiencing contamination from diffuse and point sources, which increases risks to public health. To mitigate and manage risks posed by elevated levels of contamination in urban waterways, it is critical to identify the primary water sources of contamination within catchments. Source tracking using microbial community fingerprints is one tool that can be used to identify sources. However, results derived from this approach have not yet been evaluated using independent datasets...
November 16, 2016: Water Research
https://www.readbyqxmd.com/read/27912012/coast-wide-recruitment-dynamics-of-olympia-oysters-reveal-limited-synchrony-and-multiple-predictors-of-failure
#3
Kerstin Wasson, Brent B Hughes, John S Berriman, Andrew L Chang, Anna K Deck, Paul A Dinnel, Charlie Endris, Michael Espinoza, Sarah Dudas, Matthew C Ferner, Edwin D Grosholz, David Kimbro, Jennifer L Ruesink, Alan C Trimble, Dick Vander Schaaf, Chela J Zabin, Danielle C Zacherl
Recruitment of new propagules into a population can be a critical determinant of adult density. We examined recruitment dynamics in the Olympia oyster (Ostrea lurida), a species occurring almost entirely in estuaries. We investigated spatial scales of interannual synchrony across 37 sites in eight estuaries along 2,500 km of Pacific North American coastline, predicting that high vs. low recruitment years would coincide among neighboring estuaries due to shared exposure to regional oceanographic factors. Such synchrony in recruitment has been found for many marine species and some migratory estuarine species, but has never been examined across estuaries in a species that can complete its entire life cycle within the same estuary...
December 2016: Ecology
https://www.readbyqxmd.com/read/27907178/characteristics-of-phytoplankton-biomass-primary-production-and-community-structure-in-the-modaomen-channel-pearl-river-estuary-with-special-reference-to-the-influence-of-saltwater-intrusion-during-neap-and-spring-tides
#4
Weihua Zhou, Jie Gao, Jianzu Liao, Ronggui Shi, Tao Li, Yajuan Guo, Aimin Long
In recent decades, increasing frequency and intensity of saltwater intrusion in the Modaomen Channel has threatened the freshwater supply in the surrounding cities of the Pearl River Estuary, and ulteriorly changed the environmental conditions of the estuarine waters. Phytoplankton biomass, primary production (PP) and species composition, as well as hydrological and chemical parameters were examined along a downstream transect in the Modaomen Channel during neap tide (NT) and spring tide (ST), when a strong saltwater intrusion event occurred in late September, 2011...
2016: PloS One
https://www.readbyqxmd.com/read/27903870/sea-level-driven-glacial-age-refugia-and-post-glacial-mixing-on-subtropical-coasts-a-palaeohabitat-and-genetic-study
#5
Greer A Dolby, Ryan Hechinger, Ryan A Ellingson, Lloyd T Findley, Julio Lorda, David K Jacobs
Using a novel combination of palaeohabitat modelling and genetic mixture analyses, we identify and assess a sea-level-driven recolonization process following the Last Glacial Maximum (LGM). Our palaeohabitat modelling reveals dramatic changes in estuarine habitat distribution along the coast of California (USA) and Baja California (Mexico). At the LGM (approx. 20 kya), when sea level was approximately 130 m lower, the palaeo-shoreline was too steep for tidal estuarine habitat formation, eliminating this habitat type from regions where it is currently most abundant, and limiting such estuaries to a northern and a southern refugium separated by 1000 km...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27902268/roseovarius-confluentis-sp-nov-isolated-from-estuary-sediment
#6
Xiaomeng Jia, Hye Rim Kim, Baolei Jia, Hye Hee Jeon, Kyunghwa Baek, Sang Ho Choi, Che Ok Jeon
A Gram-staining-negative and strictly aerobic bacterium, designated strain SAG6T, was isolated from estuary sediment in South Korea. Cells of strain SAG6T were found to be oxidase- and catalase-positive rods with gliding motility. Cell growth was observed at 15-40 °C (optimum, 30 °C), at pH 6.5-10.0 (optimum, pH 7.0) and in the presence of 0.5-13.0 % (w/v) NaCl (optimum, 2.0 %). Ubiquinone-10 was the only detected respiratory quinone and summed feature 8 (comprising C18:1 ω7c/C18:1 ω6c), C16:0, C18:1 ω7c 11-methyl and C12:0 were the major fatty acids identified (>5 % of the total fatty acids)...
November 2, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27897987/atmospheric-correction-of-satellite-gf-1-wfv-imagery-and-quantitative-estimation-of-suspended-particulate-matter-in-the-yangtze-estuary
#7
Pei Shang, Fang Shen
The Multispectral Wide Field of View (WFV) camera on the Chinese GF-1 satellite, launched in 2013, has advantages of high spatial resolution (16 m), short revisit period (4 days) and wide scene swath (800 km) compared to the Landsat-8/OLI, which make it an ideal means of monitoring spatial-temporal changes of Suspended Particulate Matter (SPM) in large estuaries like the Yangtze Estuary. However, a lack of proper atmospheric correction methods has limited its application in water quality assessment. We propose an atmospheric correction method based on a look up table coupled by the atmosphere radiative transfer model (6S) and the water semi-empirical radiative transfer (SERT) model for inversion of water-leaving reflectance from GF-1 top-of-atmosphere radiance, and then retrieving SPM concentration from water-leaving radiance reflectance of the Yangtze Estuary and its adjacent sea...
November 25, 2016: Sensors
https://www.readbyqxmd.com/read/27896031/salinity-and-temperature-significantly-influence-seed-germination-seedling-establishment-and-seedling-growth-of-eelgrass-zostera-marina-l
#8
Shaochun Xu, Yi Zhou, Pengmei Wang, Feng Wang, Xiaomei Zhang, Ruiting Gu
Globally, seagrass beds have been recognized as critical yet declining coastal habitats. To mitigate seagrass losses, seagrass restorations have been conducted in worldwide over the past two decades. Seed utilization is considered to be an important approach in seagrass restoration efforts. In this study, we investigated the effects of salinity and temperature on seed germination, seedling establishment, and seedling growth of eelgrass Zostera marina L. (Swan Lake, northern China). We initially tested the effects of salinity (0, 5, 10, 15, 20, 25, 30, 35, and 40 ppt) and water temperature (5, 10, 15, and 20 °C) on seed germination to identify optimal levels...
2016: PeerJ
https://www.readbyqxmd.com/read/27894801/effects-of-the-addition-of-nitrogen-and-sulfate-on-ch4-and-co2-emissions-soil-and-pore-water-chemistry-in-a-high-marsh-of-the-min-river-estuary-in-southeastern-china
#9
Minjie Hu, Benjamin J Wilson, Zhigao Sun, Peng Ren, Chuan Tong
Exogenous nitrogen (N) and sulfate (SO4(2-)), resulting from human activity, can strongly influence the emission of CH4 and CO2 from soil ecosystems. Studies have reported the effects of N and SO4(2-) on CH4 and CO2 emissions from inland peatlands and paddies. However, very few studies have presented year-round data on the effects of the addition of N and SO4(2-) on CH4 and CO2 emissions in estuarine marshes. The effects of the addition of N and SO4(2-) on the emission of CH4 and CO2 were investigated in a Cyperus malaccensis marsh in the high tidal flat of the Min River estuary of southeastern China from September 2014 to August 2015...
November 25, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27891729/low-prevalence-of-aichi-virus-in-molluscan-shellfish-samples-from-galicia-nw-spain
#10
Enrique Rivadulla, Miguel F Varela, Jesús L Romalde
AIM: The aim of this study was the detection and quantification of Aichi virus (AiV) in shellfish from three estuaries in Galicia, the main producer of molluscs in Europe. METHODS AND RESULTS: A total of 249 shellfish samples were analyzed using a reverse transcription-quantitative PCR (RT-qPCR) procedure. AiV was detected in 15 out of 249 (6.02%) samples. Ría de Ares-Betanzos showed the highest prevalence (11.1%), followed by Ría do Burgo (3.7%) and Ría de Vigo, (2...
November 28, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27886584/attributes-of-successful-actions-to-restore-lakes-and-estuaries-degraded-by-nutrient-pollution
#11
Catharine Gross, James D Hagy
As more success is achieved in restoring lakes and estuaries from the impacts of nutrient pollution, there is increased opportunity to evaluate the scientific, social, and policy factors associated with achieving restoration goals. We examined case studies where deliberate actions to reduce nutrient pollution and restore ecosystems resulted in ecological recovery. Prospective cases were identified from scientific literature and technical documents for lakes and estuaries with: (1) scientific evidence of nutrient pollution; (2) restoration actions taken to mitigate nutrient pollution; and (3) documented ecological improvement...
November 22, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27886227/impact-of-human-activities-on-subaqueous-topographic-change-in-lingding-bay-of-the-pearl-river-estuary-china-during-1955-2013
#12
Z Y Wu, Yoshiki Saito, D N Zhao, J Q Zhou, Z Y Cao, S J Li, J H Shang, Y Y Liang
Estuaries have been sites of intensive human activities during the past century. Tracing the evolution of subaqueous topography in estuaries on a decadal timescale enables us to understand the effects of human activities on estuaries. Bathymetric data from 1955 to 2010 show that land reclamation decreased the subaqueous area of Lingding Bay, in the Pearl River estuary, by ~170 km(2) and decreased its water volume by 615 × 10(6) m(3), representing a net decrease of 11.2 × 10(6 )m(3) per year and indicating the deposition of approximately 14...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27885615/the-white-mullet-mugil-curema-as-biological-indicator-to-assess-environmental-stress-in-tropical-coastal-lagoons
#13
Alejandra García-Gasca, Julián Ríos-Sicairos, Rubí Hernández-Cornejo, Isabel Cunha, Jesús N Gutiérrez, Héctor Plascencia-González, Luz María García de la Parra, Selene Abad-Rosales, Miguel Betancourt-Lozano
Several coastal lagoons and estuaries in Mexico receive untreated domestic and industrial discharges which contain complex mixtures of contaminants. In order to assess the effects of chemical contamination, we used the White mullet (Mugil curema) as biological indicator. We worked in two estuaries located in Northwest Mexico: Urias (highly polluted) and Teacapan (less polluted, therefore used as reference site). We measured several endpoints at different levels of biological organization: vitellogenin transcription in males as biomarker of estrogenic contamination, as well as reproductive, morphological (deformities), morphometric, and meristic parameters...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27878816/diel-shifts-in-the-structure-and-function-of-nearshore-estuarine-fish-communities
#14
D E Yeoh, F J Valesini, C S Hallett, D A Abdo, J Williams
Day-night shifts in the nearshore fish fauna of a temperate microtidal estuary were assessed using a holistic suite of structural and functional community attributes. Mean fish species richness and diversity (taxonomic distinctness) were higher at night across all regions of the estuary and seasons, concurring with the findings of numerous comparable studies reviewed worldwide, while the diel period in which mean abundance was higher varied among seasons. Likewise, species and functional guild compositions (the latter based on feeding modes and habitat use) both differed significantly between day and night, with the extent of the diel shift again varying seasonally...
November 23, 2016: Journal of Fish Biology
https://www.readbyqxmd.com/read/27878096/a-sixth-level-habitat-cascade-increases-biodiversity-in-an-intertidal-estuary
#15
Mads S Thomsen, Thomas Hildebrand, Paul M South, Travis Foster, Alfonso Siciliano, Eliza Oldach, David R Schiel
Many studies have documented habitat cascades where two co-occurring habitat-forming species control biodiversity. However, more than two habitat-formers could theoretically co-occur. We here documented a sixth-level habitat cascade from the Avon-Heathcote Estuary, New Zealand, by correlating counts of attached inhabitants to the size and accumulated biomass of their biogenic hosts. These data revealed predictable sequences of habitat-formation (=attachment space). First, the bivalve Austrovenus provided habitat for green seaweeds (Ulva) that provided habitat for trochid snails in a typical estuarine habitat cascade...
November 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27878085/stable-isotope-based-trophic-structure-of-pelagic-fish-and-jellyfish-across-natural-and-anthropogenic-landscape-gradients-in-a-fjord-estuary
#16
Sean M Naman, Correigh M Greene, Casimir A Rice, Joshua Chamberlin, Letitia Conway-Cranos, Jeffery R Cordell, Jason E Hall, Linda D Rhodes
Identifying causes of structural ecosystem shifts often requires understanding trophic structure, an important determinant of energy flow in ecological communities. In coastal pelagic ecosystems worldwide, increasing jellyfish (Cnidaria and Ctenophora) at the expense of small fish has been linked to anthropogenic alteration of basal trophic pathways. However, this hypothesis remains untested in part because baseline description of fish-jellyfish trophic dynamics, and the environmental features that influence them are lacking...
November 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27876374/characterizing-light-attenuation-within-northwest-florida-estuaries-implications-for-restore-act-water-quality-monitoring
#17
Robyn N Conmy, Blake A Schaeffer, Joseph Schubauer-Berigan, Jessica Aukamp, Allyn Duffy, John C Lehrter, Richard M Greene
Water Quality (WQ) condition is based on ecosystem stressor indicators (e.g. water clarity) which are biogeochemically important and critical when considering the Deepwater Horizon oil spill restoration efforts under the 2012 RESTORE Act. Nearly all of the proposed RESTORE projects list restoring WC as a goal, but 90% neglect water clarity. Here, dynamics of optical constituents impacting clarity are presented from a 2009-2011 study within Pensacola, Choctawhatchee, St. Andrew and St. Joseph estuaries (targeted RESTORE sites) in Northwest Florida...
November 19, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27871750/biogeochemical-and-hydrological-drivers-of-the-dynamics-of-vibrio-species-in-two-patagonian-estuaries
#18
Germán A Kopprio, M Eugenia Streitenberger, Kentaro Okuno, Mónica Baldini, Florencia Biancalana, Anna Fricke, Ana Martínez, Sucharit B Neogi, Boris P Koch, Shinji Yamasaki, Rubén J Lara
The ecology of the most relevant Vibrio species for human health and their relation to water quality and biogeochemistry were studied in two estuaries in Argentinian Patagonia. Vibrio cholerae and Vibrio parahaemolyticus were reported in >29% of cases at the Río Colorado and Río Negro estuaries. Neither the pandemic serogroups of Vibrio cholerae O1, Vibrio cholerae O139 nor the cholera toxin gene were detected in this study. However, several strains of V. cholerae (not O1 or O139) are able to cause human disease or acquire pathogenic genes by horizontal transfer...
November 18, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27871626/photolysis-of-2-4-6-trinitrotoluene-in-seawater-and-estuary-water-impact-of-ph-temperature-salinity-and-dissolved-organic-matter
#19
Dianne J Luning Prak, James E T Breuer, Evelyn A Rios, Erin E Jedlicka, Daniel W O'Sullivan
The influence of salinity, pH, temperature, and dissolved organic matter on the photolysis rate of 2,4,6-trinitrotoluene (TNT) in marine, estuary, and laboratory-prepared waters was studied using a Suntest CPS+® solar simulator equipped with optical filters. TNT degradation rates were determined using HPLC analysis, and products were identified using LC/MS. Minimal or no TNT photolysis occurred under a 395-nm long pass filter, but under a 295-nm filter, first-order TNT degradation rate constants and apparent quantum yields increased with increasing salinity in both natural and artificial seawater...
November 18, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27866739/an-integrated-approach-for-identifying-priority-contaminant-in-the-great-lakes-basin-investigations-in-the-lower-green-bay-fox-river-and-milwaukee-estuary-areas-of-concern
#20
Shibin Li, Daniel L Villeneuve, Jason P Berninger, Brett R Blackwell, Jenna E Cavallin, Megan N Hughes, Kathleen M Jensen, Zachary Jorgenson, Michael D Kahl, Anthony L Schroeder, Kyle E Stevens, Linnea M Thomas, Matthew A Weberg, Gerald T Ankley
Environmental assessment of complex mixtures typically requires integration of chemical and biological measurements. This study demonstrates the use of a combination of instrumental chemical analyses, effects-based monitoring, and bio-effects prediction approaches to help identify potential hazards and priority contaminants in two Great Lakes Areas of Concern (AOCs), the Lower Green Bay/Fox River located near Green Bay, WI, USA and the Milwaukee Estuary, located near Milwaukee, WI, USA. Fathead minnows were caged at four sites within each AOC (eight sites total)...
November 17, 2016: Science of the Total Environment
keyword
keyword
81931
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"