Hanan Almahasheer

Hanan Almahasheer
Imam Abdul Rahman bin Faisal University · Department of Biology

PhD (Red Sea Research Centre, KAUST)

About

58
Publications
27,859
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1,426
Citations
Citations since 2017
43 Research Items
1408 Citations
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20172018201920202021202220230100200300400

Publications

Publications (58)
Article
Full-text available
There has been increasing focus on conserving coastal ecosystems as they have been recognized as high ecosystem carbon stocks and are in the process of land conversion. The present study aims to examine how different vegetation covers impact the soil organic carbon (SOC) stock in coastal sabkhas. To this end, the study was carried out at ten sampli...
Article
The transporting of oil via the Arabian Gulf for centuries has resulted in the pollution of the coasts by heavy metals, and therefore, remediation actions are needed. In this review, we first evaluated heavy metal pollution on the coasts by assembling the research on published metal concentrations in sediments and water bodies surrounding the Arabi...
Article
Coffee is the most popular beverage after water and is consumed worldwide. Its consumption in high amount may pose health risks. Moreover, most of the market's available coffee beans products do not mention their proper amount of caffeine. To develop an efficient and reliable method of caffeine extraction in commercial coffee brands, automated solv...
Article
An environmental assessment of the Western Arabian Gulf Coastal regions was done by assessing heavy metals in sediments and seawater, as well as other environmental parameters. A total of 94 sediment samples and 94 water samples were collected from 22 locations to estimate 12 heavy metals in each sample. This was achieved by using Inductively Coupl...
Article
The present study describes the glucose content of 35 Arabian date fruit varieties, that were collected randomly from Saudi Arabian local markets in 2019. Date samples were analyzed for moisture and glucose contents. Using SP-3000nano UV-VIS Spectrophotometer (Optima, japan). In general, the moisture contents ranged from 7.3±0.11 to 29.2±0.13 g/100...
Article
Full-text available
The growth of Avicennia marina (A. marina) was not previously assessed using internodal analysis in the Western Arabian Gulf. The node production in 40 branches/axillary shoot in Syhat city, Saudi Arabia, ranged from 6 to 9 nodes y–1. Moreover, the annual cycles of the internodal length represent the branch growth rate in centimeters per year (rang...
Article
Full-text available
Salt marshes form along coastlines and are very interesting ecosystems due to their function and services. In the future, salt marsh plants might provide food and medicine as crops irrigated via seawater in hyper-arid regions. In the Arabian Gulf, little is known about salt marsh vegetation. Therefore, a targeted search on scientific literature was...
Article
A healthy condition is defined by complex human metabolic pathways that only function properly when fully satisfied by nutritional inputs. Poor nutritional intakes are associated with a number of metabolic diseases, such as diabetes, obesity, atherosclerosis, hypertension, and osteoporosis. In recent years, nutrition science has undergone an extrao...
Article
Full-text available
Sequestration of plastics in sediments is considered the ultimate sink of marine plastic pollution that would justify unexpectedly low loads found in surface waters. Here, we demonstrate that mangroves, generally supporting high sediment accretion rates, efficiently sequester plastics in their sediments. To this end, we extracted micro- plastics fr...
Article
Full-text available
We depend on the sea, economically, social well-being, and for the quality of our lives, yet direct and indirect human activities have affected the marine environment, causing many problems such as overfishing and pollution at the local scale and ocean warming and acidification at the global one. Hence, addressing the cumulative effects of these ac...
Article
Full-text available
Mangroves are important coastal ecosystems of warm climatic regions that often grow in shallow saline or brackish waters of estuaries and river mouths which are affected by wide tidal intervals and receive abundant nutrient supply. However, mangroves also occur in areas of little tidal influence and devoid of riverine inputs, where they can develop...
Article
Full-text available
Herbs are used for centuries by many people worldwide. This study derives insights into the use and content of herbs that are consumed among Saudi citizens. An online questionnaire was distributed to understand the basic information about Saudi citizens’ preference and daily patterns of herbal plants that are usually used as drinks. Moreover, conce...
Article
Full-text available
Vegetated coastal ecosystems along the Red Sea and Arabian Gulf coasts of Saudi Arabia thrive in an extremely arid and oligotrophic environment, with high seawater temperatures and salinity. Mangrove, seagrass and saltmarsh ecosystems have been shown to act as efficient sinks of sediment organic carbon, earning these vegetated ecosystems the monike...
Article
Full-text available
This study aimed to investigate the bioremediation efficiency of phytohormone-producing endophytic Bacillus amyloliquefaciens RWL-1 isolated from rice seeds. In this study, we tested RWL-1 against various heavy metals (Cu, Cr, Pb, and Cd). Among the tested heavy metals, RWL-1 showed highest tolerance for Cu stress and we observed alterations in gro...
Article
Full-text available
Coastal vegetated ecosystems are intense global carbon (C) sinks; however, seagrasses and mangroves in the Central Red Sea are depleted in organic C (Corg). Here, we tested whether Corg depletion prevails along the Red Sea, or if sediment Corg and nitrogen (N) stocks reflect the latitudinal productivity gradient of the Red Sea. We assessed Corg and...
Article
Full-text available
Mangrove forests, through pneumatophores, are filters that retain large floating plastic objects and therefore constitute a sink of marine plastic pollution.
Article
Full-text available
Major development along the Western Arabian Gulf coast has disturbed the marine environment, and led to increased concentrations of heavy metals in the coastal soils. The amount of 13 of these metals (Ag, Al, As, Cd, Cr, Cu, Fe, Mn, Mo, Ni, Pb, V and Zn) in Avicennia marina branches and leaves as well as in rhizosphere soil samples from two Bays 70...
Article
Full-text available
Calcium carbonates (CaCO3) often accumulate in mangrove and seagrass sediments. As CaCO3 production emits CO2, there is concern that this may partially offset the role of Blue Carbon ecosystems as CO2 sinks through the burial of organic carbon (Corg). A global collection of data on inorganic carbon burial rates (Cinorg, 12% of CaCO3 mass) revealed...
Article
Full-text available
Several studies have been carried out on heavy metal pollution in mangrove ecosystems. However, the role of mangroves in heavy metal remobilization is still relatively unknown. On one side, mangrove woody organs and soils sequester heavy metals for long time periods, but on the other hand, senescence of mangrove leaves may return these metals colle...
Article
Full-text available
Abstract Seagrasses play an important role in climate change mitigation and adaptation, acting as natural CO2 sinks and buffering the impacts of rising sea level. However, global estimates of organic carbon (Corg) stocks, accumulation rates and seafloor elevation rates in seagrasses are limited to a few regions, thus potentially biasing global esti...
Article
Full-text available
Measurements of isotopic composition of marine primary producers are a valuable tool to follow and trace the source and cycling of organic matter in the marine systems, as well to describe the physiological status of aquatic photosynthetic organisms. Although stable isotope data abounds in the literature, relatively limited information regarding th...
Article
Full-text available
Red Sea mangroves occur in an oligotrophic sea without permanent freshwater inputs. Understanding the mechanisms to cope with nutrient limitation is, therefore, important to understand their distribution and nutrient dynamics in coastal ecosystems. We measured total number of meristems to estimate their leaves production and nutrients (N, P, and Fe...
Article
Full-text available
In the version of this Article originally published, the potential carbon loss from soils as a result of mangrove deforestation was incorrectly given as ‘2.0–75 Tg C yr–1’; this should have read ‘2–8 Tg C yr–1’. The corresponding emissions were incorrectly given as ‘~7.3–275 Tg of CO2e’; this should have read ‘~7–29 Tg of CO2e’. The corresponding p...
Poster
Full-text available
Dates palm most important crops in the kingdom of Saudi Arabia. The genus contains 12 to 1500TH species that are widely cultivated in the tropics. I did a search in the governmental science books for schools was performed, from grade 1 to grade 12. And I conduct questionnaire, in this questionnaire people knowledge about palm trees were assessed us...
Article
Full-text available
Mangroves are the natural protectors of the coast, carbon sinks, and a nursery to many terrestrial as well as aquatic organisms. Different effects caused by natural forces together with anthropogenic factors have reduced mangrove cover on a global scale, yet little is known about the overall surface covered by mangroves in the Arabian Gulf. Therefo...
Article
Full-text available
Mangroves forests of Avicennia marina occupy about 135 km² in the Red Sea and represent one of the most important vegetated communities in this otherwise arid and oligotrophic region. We assessed the soil organic carbon (Corg) stocks, soil accretion rates (SAR; mm y⁻¹) and soil Corg sequestration rates (g Corg m⁻² yr⁻¹) in 10 mangrove sites within...
Data
https://doi.org/10.6084/m9.figshare.5386846.v1
Article
Full-text available
Mangrove soils represent a large sink for otherwise rapidly recycled carbon (C). However, widespread deforestation threatens the preservation of this important C stock. It is therefore imperative that global patterns in mangrove soil C stocks and their susceptibility to remineralization are understood. Here, we present patterns in mangrove soil C s...
Presentation
Full-text available
In celebration of Earth Day ”Basic of ecology students” at IAU http://www.uod.edu.sa/en presented seeds and/or seedlings to mothers and neighbors then gave a quick lesson about plantation.
Article
http://phdtalk.blogspot.com/2017/04/what-i-learned-from-my-phd.html
Article
https://theconversation.com/red-sea-mangroves-fight-back-in-the-face-of-global-decline-71427
Article
Full-text available
As coastal plants that can survive in salt water, mangroves play an essential role in large marine ecosystems (LMEs). The Red Sea, where the growth of mangroves is stunted, is one of the least studied LMEs in the world. Mangroves along the Central Red Sea have characteristic heights of ~2 m, suggesting nutrient limitation. We assessed the nutrient...
Research
Full-text available
Kaust grade 12 and 5 students participated on mangrove plantation in 2014 and 2015, to help me plant mangrove seedlings that I cultivate for my experiments then attended my PhD defense. I am extremely thankful to them and their teacher Mr.Euan Riddell
Article
Full-text available
The formation of nodes, stem elongation and the phenology of stunted Avicennia marina was examined in the Central Red Sea, where Avicennia marina is at the limit of its distribution range and submitted to extremely arid conditions with salinity above 38 psu and water temperature as high as 35° C. The annual node production was rather uniform among...
Research
Full-text available
News: planting mangroves in KAUST south beach with school students (Dec 2014).
Thesis
http://repository.kaust.edu.sa/kaust/bitstream/10754/621877/1/Hanan+Almahasheer+Dissertation.pdf#page=166
Poster
Full-text available
http://www.conference.ifas.ufl.edu/mmm4/docs/MMM4_2016_Abstract_Book_online.pdf
Article
Full-text available
Across the Earth, mangroves play an important role in coastal protection, both as nurseries and carbon sinks. However, due to various human and environmental impacts, the coverage of mangroves is declining on a global scale. The Red Sea is in the northern-most area of the distribution range of mangroves. Little is known about the surface covered by...
Data
Across the Earth, mangroves play an important role in coastal protection, both as nurseries and carbon sinks. However, due to various human and environmental impacts, the coverage of mangroves is declining on a global scale. The Red Sea is in the northern-most area of the distribution range of mangroves. Little is known about the surface covered by...
Poster
Full-text available
Different treatment effect different parts of the plant, in this experiment all treatments containing Iron significantly, enhanced the plant growth were the nitrogen particularly increased the number of leaves. Iron is probably limiting mangrove growth because iron addition alone lead to the same results as a complete nutrient edition.
Article
Full-text available
Mangrove forests are of special interest because of their metal accumulation potenials as they occur in environments characterized by an excess of toxic ions. In this current study, we investigated the accumulation capacity of (Avicennia marina), a dominant mangrove plant inhabiting Tarut Bay in Eastern Saudi Arabia. Samples comprising mangroves, w...

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Projects

Projects (2)
Project
IAU-Biology-Graduation-Project
Project
Understanding fate of plastic pollution in the Red Sea, including estimates of debris density in surface waters and possible sinks. Unveiling the role of coastal ecosystems as filters and reservoirs of plastics. Hypothesize sources and consequent spatial and temporal distribution of plastic debris in the basin.