A5019126037- Marine and coastal ecosystems
- Coral and Marine Ecosystems Studies
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Marine and fisheries research
- Coastal and Marine Management
- Diatoms and Algae Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Water Quality and Pollution Assessment
- Inflammatory Bowel Disease
- Microscopic Colitis
- Antifungal resistance and susceptibility
- Ocean Acidification Effects and Responses
- Environmental DNA in Biodiversity Studies
- Biological Control of Invasive Species
- Inflammatory Biomarkers in Disease Prognosis
- Gut microbiota and health
- Geochemistry and Elemental Analysis
- Aquatic Ecosystems and Biodiversity
- Respiratory viral infections research
- Plant tissue culture and regeneration
- Pneumonia and Respiratory Infections
- Marine Sponges and Natural Products
- Identification and Quantification in Food
University of Jordan
2014-2024
Yarmouk University
2016
Old Dominion University
2012
Bowling Green State University
2005-2007
Functional traits define species by their ecological role in the ecosystem. Animals themselves are host-microbe ecosystems (holobionts), and application of ecophysiological approaches can help to understand functioning. In hard coral holobionts, communities dinitrogen (N2)-fixing prokaryotes (diazotrophs) may contribute a functional trait providing bioavailable nitrogen (N) that could sustain productivity under oligotrophic conditions. This study quantified N2 fixation diazotrophs associated...
The Arabian Sea oxygen minimum zone (OMZ), the largest suboxic region in world's oceans, is responsible for up to half of global mesopelagic fixed nitrogen (N) loss from ocean via denitrification and anammox. Dinitrogen (N(2)) fixation usually attributed cyanobacteria surface ocean. Model prediction physiological inhibition N(2) by oxygen, however, suggest that should be enhanced near oxygen-deficient (ODZ) Sea. cyanobacterial nifH genes (the gene encoding dinitrogenase reductase) have been...
Coral holobionts (i.e., coral-algal-prokaryote symbioses) exhibit dissimilar thermal sensitivities that may determine which coral species will adapt to global warming. Nonetheless, studies simultaneously investigating the effects of warming on all holobiont members are lacking. Here we show exposure increased temperature affects key physiological traits (herein: animal host, zooxanthellae and diazotrophs) both Stylophora pistillata Acropora hemprichii during after stress. S. experienced...
High-throughput sequencing (HTS) of DNA barcodes (metabarcoding), particularly when combined with standardized sampling protocols, is one the most promising approaches for censusing overlooked cryptic invertebrate communities. We present biodiversity estimates based on cytochrome c oxidase subunit 1 (COI) gene coral reefs Gulf Aqaba, a semi-enclosed system in northern Red Sea. Samples were obtained from devices (Autonomous Reef Monitoring Structures (ARMS)) deployed 18 months. barcoding...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 519:141-152 (2015) - DOI: https://doi.org/10.3354/meps11091 Seasonal variation in dinitrogen fixation and oxygen fluxes associated with two dominant zooxanthellate soft corals from northern Red Sea Vanessa N. Bednarz1,*, Ulisse Cardini1, Nanne van Hoytema1, Mamoon M. D. Al-Rshaidat2,3, Christian Wild1,4...
Abstract The tropical seagrass Halophila stipulacea exhibits a limited capacity to use nitrate, but has high uptake and efficiency for ammonium. Consequently, N 2 fixation by associated diazotrophic epiphytes may be important in providing ammonium needed photosynthesis growth. When exposed seasonality, this association could provide competitive advantage H. relation other species, related knowledge is scarce. Here, we thus report measurements of net (O fluxes) (acetylene reduction) with from...
In the present work, GHARS and MECH DEGLA downgraded date varieties were used in a fermentation medium order to produce citric acid by
During austral summer 2003, we tracked a patch of surface water infused with the tracer sulfur hexafluoride, but without addition Fe, through subantarctic waters over 10 days in order to characterize and quantify algal Fe pools fluxes construct detailed biogeochemical budget. Nutrient profiles characterized this as high‐nitrate, low‐silicic acid, low‐chlorophyll (HNLSiLC) mass deficient dissolved Fe. The low condition was confirmed by several approaches: shipboard iron enrichment experiments...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 527:47-57 (2015) - DOI: https://doi.org/10.3354/meps11224 Dinitrogen fixation and primary productivity by carbonate silicate reef sand communities of Northern Red Sea Vanessa N. Bednarz1,*, Nanne van Hoytema1, Ulisse Cardini1, Malik S. Naumann1, Mamoon M. D. Al-Rshaidat2,3, Christian Wild1,4 1Coral Reef Group...
Iron bioavailability in Lake Superior was assessed during field surveys conducted 2001–2002. Dissolved iron (Fed) ranged between 1 and 4 nM at offshore stations >10 most nearshore sites. availability using a luminescent Synechococcus bioreporter comprising luciferase reporter controlled by an iron-responsive promoter isiAB. Bioreporter luminescence negatively correlated to Fed measured the samples. Distance from shore better predictor of than season. Water collected sampled spring summer...
Tropical corals are often associated with dinitrogen (N2)-fixing bacteria (diazotrophs), and seasonal changes in key environmental parameters, such as dissolved inorganic nitrogen (DIN) availability seawater temperature, known to affect N2 fixation coral-microbial holobionts. Despite, then, potential for depth-related reef corals, variation has not yet been investigated. Therefore, this study quantified (winter vs. summer) rates the reef-building coral Stylophora pistillata collected from...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 575:69-80 (2017) - DOI: https://doi.org/10.3354/meps12206 Seasonality affects dinitrogen fixation associated with two common macroalgae from a coral reef in northern Red Sea Arjen Tilstra1,*, Vanessa N. Bednarz2,3, Ulisse Cardini2,4, Nanne van Hoytema2, Mamoon M. D. Al-Rshaidat5, Christian Wild1 1Marine...
Objective: Inflammatory Bowel Diseases (IBDs) are chronic inflammatory conditions of the gastrointestinal tract, including Crohn’s disease (CD) and ulcerative colitis (UC). Developing methods for effective screening diagnosis is extremely needed. Accordingly, this study aims to evaluate potential immune cells ratios in IBD. Methods: This case-control includes data from Jordan University Hospital (JUH) medical records IBD patients with age- gender-matched healthy controls. Results: included...
Microcystis blooms and the related toxin known as microcystin-LR (MC-LR) put safety of human water consumption global irrigation practices in jeopardy.MC-LR is widely distributed various environments, including water, sediments, plants, other aquatic organisms.The use water-containing microcystins for agricultural purposes may have to be restricted despite limited availability clean resources.Accordingly, present work aimed determine MC-LR concentrations recognize environmental parameters...
Aim: Delayed diagnosis of inflammatory bowel disease (IBD) may lead to increased treatment costs and surgical risks. This study aims describe the extent IBD delay in Jordan. Methods: Our included 110 patients, utilizing interviews medical records from Jordan University Hospital. Data covered sociodemographic characteristics, health history, time symptom onset diagnosis, first consultation number physicians consulted before IBD-related history. Results: The median was 9 months. Median times...
Data are reported for an inland artificial lagoon (Ayla) to evaluate the impact of lagoon’s modeled design and water replenishment system on its quality coastal ecosystem. This study focused Ayla’s upper (UL) only, due isolation from two other lagoons ambient seawater in Gulf Aqaba (GoA). Nutrient measurements (nitrite, nitrate, ammonium, phosphate, silicate) addition Chlorophyll a (Chl a) data were collected between July 2012 June 2013. Chl values UL not significantly different GoA, did...