Adil Yousif Al-Handal

Adil Yousif Al-Handal
University of Gothenburg | GU · Department of Biological & Environmental Sciences

Ph.D

About

74
Publications
30,966
Reads
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875
Citations
Citations since 2016
30 Research Items
583 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
I am working on diatom material collected from coastal reagions around Sweden foe ecological and taxonomical studies, a number of new species have been desribed. Also my work extends to investigate photonic properties of diaotm frustules in collaboration with Swedish and Italian scientists.
Additional affiliations
February 2013 - January 2014
University of South Florida St. Petersburg
Position
  • Professor
December 2008 - present
University of Gothenburg
Position
  • Professor (Full)
November 2005 - December 2008
University of Gothenburg
Position
  • Professor (Associate)

Publications

Publications (74)
Article
A brackish water diatom species, Pinnularia furatensis sp. nov. is described from the Euphrates River at Samawah city, Southern Iraq. The same species also occurred in Huwaiza marsh, 200 km to the south of Samawah. Description of this species is based on observations using light and scanning electron microscopy. The new species belongs to the Pinnu...
Article
The diatom genus Fallacia includes species having a conopeum which is a perforated thin sheath of silica lying along the apical axis on the external valve face and a hyaline lateral area in the internal valve face. In surveying the benthic diatoms of Basra, a new small brackish water species, Fallacia fawensis was found associated with fine-grained...
Article
The diatom genus Fallacia includes species having a conopeum which is a perforated thin sheath of silica lying along the apical axis on the external valve face and a hyaline lateral area in the internal valve face. In surveying the benthic diatoms of Basra, a new small brackish water species, Fallacia fawensis was found associated with fine-grained...
Article
Full-text available
Synedropsis abuflosensis sp. nov. is the third species of the genus recorded from a sub-tropical brackish water habitat as opposed to a polar distribution. This species is differentiated from others in the genus by having a different number of slits in the apical slit field at opposite ends of the valve (i.e., 4 at the end possessing a rimoportula...
Article
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Continuous observations of Antarctic benthic diatoms are necessary to detect changes in species composition and biodiversity that may result from environmental changes. The present work provides a systematic list of benthic diatoms from Potter Cove (62.03°S 58.35°W) collected during summer 2015. The new findings are compared with observations made...
Article
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Several species of diatoms, unicellular microalgae which constitute the main component of phytoplankton, are characterized by an impressive photosynthetic efficiency while presenting a noticeable tolerance versus exposure to detrimental UV radiation (UVR). In particular, the growth rate of the araphid diatom Ctenophora pulchella is not significantl...
Article
Cocconeis crawfordii from the Southern Baltic Sea at Wismar, Germany, is described as new. Its description is based on three unialgal cultures. Two of the strains auxosporulated and showed an almost quadrupling of size in length and width. Morphologically, this species with its two diff erent valves belongs to the genus Cocconeis. As with all Cocco...
Article
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2021): Navithidium gen. nov., a new monoraphid diatom (Bacillariophyceae) genus based on Achnanthes delicatissima Simonsen, Diatom Research, We investigated the ultrastructure of Achnanthes delicatissima Simonsen in materials collected from the Swedish Baltic coast. Valve structure differs markedly from that of Achnanthes sensu lato, particularly i...
Article
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Described is here Mastogloia jahniae sp. nov. a species new to science from Skatan on the Baltic Sea, east coast of Sweden. Description of this new species is based on light and scanning electron microscopy. The new species is classified in the Mastogloia section Ellipticae and is characterized by having radiating short and long striae around the c...
Article
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Climate change-induced glacial melt affects benthic ecosystems along the West Antarctic Peninsula, but current understanding of the effects on benthic primary production and respiration is limited. Here we demonstrate with a series of in situ community metabolism measurements that climate-related glacial melt disturbance shifts benthic communities...
Article
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The genus Entomoneis includes diatoms with an elevated bilobate keel, a sigmoid raphe canal and numerous girdle bands. It is known to inhabit various environments, from freshwater to marine, both plankton and benthos. During a phytoplankton investigation in the Kungälv estuary on the west coast of Sweden, we observed numerous cells belonging to Ent...
Article
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The present checklist contributes to our knowledge on the biodiversity, distribution and environmental preferences of Shatt Al-Arab river diatoms. The list is compiled from all diatoms reported and documented in a number of scientific articles in the last six decades. Diatom names are the latest accepted names; synonyms are provided only for those...
Book
Full-text available
The authors document the diatom species composition and ecology in the two major water impoundments of Southern Iraq, the Mesopotamian Marshes and Shatt Al-Arab River. Based on light and scanning electron microscopy investigations, 293 taxa are documented, including the description of three new species Biremis sigmoidea Al-Handal Fragilaria koensab...
Article
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The Antarctic Peninsula experiences a fast retreat of glaciers, which results in an increased release of particles and sedimentation and, thus, a decrease in the available photosynthetic active radiation (PAR, 400–700 nm) for benthic primary production. In this study, we investigated how changes in the general sedimentation and shading patterns aff...
Article
In 2020, the global cap of maximum allowable sulphur content in marine fuel will be reduced from the current 3.5% to 0.5%. Another way to reduce the sulphur emissions is to install a seawater scrubber that cleans exhausts but instead release acidic water containing nutrients and contaminants back to the marine environment. In the current study, scr...
Article
A new marine diatom species, Nitzschia biundulata is described. This species was collected and isolated from the ice cover in the Amundsen Sea, Antarctica during the Austral summer, 2011. The description is based on light and scanning electron microscopes examination as well as molecular analysis including 18S SSU rRNA and rbcL. Morphologically, N....
Article
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This paper is part of a project of studying benthic diatom biodiversity on marine coastal regions of Sweden with focus on rare and less known species. Two new species of Cocconeis Ehrenb. are described from Vrångö, a small island in the west coast of Sweden. Both species were found as epiphytic on the green alga Ulva intestinalis L. Cocconeis magno...
Article
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The recent discovery of coral reefs off Basra, Southern Iraq, have prompted the investigation of marine benthic assemblages in this unexplored ecosystem. These corals are thriving in an environment with conditions not usually considered typical for reefs, such as increased turbidity, temperature fluctuation, and currents. This study documents 96 di...
Article
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Cocconeis sawensis Al-Handal & Riaux-Gobin (2014: 217), first described from a saline lake in Southern Iraq (Middle East), is observed for the first time in South America attached on Cladophora sp. from Peixe lagoon in Southern Brazil. Specimens were examined with light and electron microscopy and some morphometric variations were observed in relat...
Article
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While collecting epiphytic diatom samples from the west coast of Sweden, a small Mastrogloia species has been observed and could not be matched with any of the described taxa. Based on both light and electron microscopes examination, this species has been described as new, Mastogloia wulffii sp. nov. and included in Mastogloia section Sulcatae. Thi...
Article
A new marine diatom, Gomphonemopsis ligowskii, is described. Gomphonemopsis ligowskii was found as an epiphyte on the brown macrophyte, Desmarestia anceps, collected from King George Island, Antarctica in January 2016. This species is the first of the genus described from a polar region. It is a small and relatively rare taxon that is characterized...
Article
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Planothidium juandenovense sp. nov. (Bacillariophyta) is described from the marine tropical environments of Juan de Nova I. (Mozambique Channel), Rodrigues I. (Mascarene Archipelago) and from Guam (Northern Mariana Is., Pacific). This small and relatively rare taxon has short multiseriate striae on the sternum valve (SV), hooked raphe valve (RV) te...
Article
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The relationship between diatom species, environmental variables and different substrates in Shatt Al-Arab river was studied during the period from December 2012 to November 2013 in seven stations along the course of the Shatt Al-Arab river. A total of 193 taxa belonging to 70 genera were identified. Diatom assemblages in the Shatt Al-Arab river in...
Article
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The present study provides the first detailed list of diatoms from the coral reefs of Reunion and Rodrigues Islands in the Western Indian Ocean. The list includes 141 taxa belonging to 59 genera excluding many taxa previously described or partially reported in separate works from the region. Many of the taxa recorded are not known from habitats out...
Article
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The most dramatic effects of global climate change are predicted for the Arctic, and there is a raising concern about the lack of baseline information on microalgal biodiversity. The present study was motivated by the general lack of information on species distribution of Arctic benthic diatoms and particularly studies providing photographs to faci...
Article
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Two new species of Mastogloia, M. abnormis and M. descrepata, are described from the saline Sawa Lake, in South Iraq. These species belong to the Mastogloia section Sulcatae, which is characterized by the presence of a central furrow on the external valve face. Descriptions of these species are based on light microscope (LM) and scanning electron m...
Article
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The Mesopotamian marshlands are one of the most internationally important wetlands in the Middle East as it constitutes a nursing ground for many species of birds migrating from North Europe as well as for its rich biodiversity. These marshlands have undergone significant environmental changes during the last three decades owing to decreasing fresh...
Article
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A new species of the genus Williamsella (Fragilariophyceae) is described from a saline lake in southern Iraq. Williamsella iraqiensis sp. nov. was found free living and as epiphyte on Chara sp. in Sawa Lake. This species is the second described of the genus Williamsella which was originally reported from Blue Lake warm springs, Utah, USA. Williamse...
Article
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Two new species of the genus Mastogloia are described. Mastogloia sawensis sp. nov. and M. vestigiostriata sp. nov. were encountered as epiphytes on Chara sp. which covers the sediment of Sawa Lake, an isolated saline water body in southern Iraq. Mastogloia sawensis belongs to the section Lanceolatae and is closely similar to M. lanceolata but diff...
Article
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Rhoicosphenia michali sp. nov., described from the shallow sublittoral zone in Antarctica, is the second species in the genus with just one raphe slit on its convex valve. The first species, Rhoicosphenia flexa, was also described from marine coastal habitats in the Southern Hemisphere. Here, the morphology and ecology of R. flexa and R. michali ar...
Article
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e present work provides a �rst insight into the structure of epiphytic diatom assemblages inhabiting some dominant vegetation of the Huwaiza marsh, which is one of the most ecologically important wetlands in the Middle East. A total of 74 taxa belonging to 38 genera were recorded, of which Cocconeis placentula var. euglypta and Fragilaria pulchella...
Article
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A new species of the genus Cocconeis is described. Cocconeis sawensis sp. nov. was observed as epiphyte on the macrophyte Chara Linn. sp., collected from a saline lake in Iraq (Sawa Lake). Description of the new species is based on details observed with light and scanning electron microscopy. Cocconeis sawensis belongs to a group of taxa similar to...
Article
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Abstract With a total area of >7,750 km2, the Mesopotamian marshes near the border between Iraq and Iran provide habitats for millions of birds and most of the commercial fisheries in this region. Beginning in the 1990s, human activities such as war, dam construction, restoration, and water supply diversions significantly influenced the ecosystems....
Article
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We compared primary production and respiration of temperate (Helgoland, North Sea) and subtidal Arctic (Kongsfjorden, Svalbard) microphytobenthic communities during summer. The diatom communities were generally characterized as cosmopolitan, displayed no site specificity, and had similar chl a and fucoxanthin concentrations. Their net and gross pho...
Article
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Olifantiella Riaux-Gobin et Compère (Bacillariophyta, Biraphidineae), a monospecific diatom genus from coral reef environments in Réunion Island (Western Indian Ocean), was collected from Rodrigues Island (easterly island of the Mascarene archipelago) in 2007. Several taxa with the external characteristics of Olifantiella were observed in shallow l...
Article
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The coral sands from reef lagoons off Mascarenes (i.e. the Reunion and Rodrigues Islands, Western Indian Ocean) contain a high diversity of small-sized, achnanthoid diatoms, several of which have the distinctive features of the genus Planothidium Round & Bukhtiyarova. Among these Planothidium species, three small-sized taxa are presented in this pa...
Article
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We present the results of accelerator mass spectrometry (AMS) radiocarbon dating of 11 samples collected from 4 locations in southern Iraq. As a result of the hiatus in fieldwork in that region since 1990, and the antiquity of the majority of archaeological excavations conducted there, the record of 14 C dates for southern Mesopotamia is patchy for...
Conference Paper
Full-text available
Overall the epiphytic community needs further research as they will spread conform with their hosts over the reefs in future. Macroalgae are becoming a dominant benthic component on Caribbean coral reefs, with increased abundance and frequency across all reef zones. Over the past two decades, different macroalgae like Lobophora variegata (Lamouroux...
Article
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Two diatoms related to Cocconeis peltoides Hustedt (Bacillariophyceae), from coral reef environments (Mascarenes, Western Indian Ocean), are proposed as a new Cocconeis variety and a new C. species: Cocconeis peltoides var. archaeana Riaux-Gobin et Compère and Cocconeis sigillata Riaux-Gobin et Al-Handal. Cocconeis peltoides and the two new taxa po...
Article
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Two new species were found on coral sediments of Mascarene archipelago: Amphicocconeis mascarenica sp. nov., relatively frequent in Réunion and rare in Rodrigues Islands, and A. rodriguensis sp. nov., relatively rare in Rodrigues and scarce in Réunion. Comparison was made with A. disculoides and A. debesii (Hustedt) De Stefano, and with species per...
Article
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Physicochemical features of Wadi Al-Arab Dam (reservoir), Jordan Variations in physical and chemical conditions were investigated at Wadi Al-Arab Dam Reservoir (Jordan). Mean surface water temperature was 22.5°C and two distinctive temperature layers, epilimnion (down to 15 m, mean temperature 28.6°C) and hypolimnion (down to 35 m, mean temperature...
Article
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Coral sands off Réunion Island and Rodrigues (Mascarene archipelago, Western Indian Ocean) support diverse diatom communities, particularly rich in Monoraphidineae. Recent surveys of reef environments (June 2005 and June 2007) permitted the recognition of several taxa belonging to the diatom genus Cocconeis, among which are two new, relatively smal...
Article
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Details of two new small marine taxa of the genus Cocconeis Ehrenberg are described; C. pottercovei sp. nov. and C. pinnata var. matsii var. nov., which were observed as epipelic and epiphytic in Potter Cove, King George Island, Antarctica. Descriptions are based on both light and scanning electron microscope observations. C. pottercovei belongs to...
Article
Full-text available
This study is the first to provide a floristic list of the diatom flora in the restored Mesopotamian marshes in South Iraq. One hundred and sixteen taxa were recorded representing forty-nine genera. All taxa recorded are documented with light microscope micrographs. Owing to the change in the water chemistry after marsh restoration and rehabilitati...
Article
Full-text available
This paper reviews the composition, biogeography and zonation of benthic algae in Arctic and Antarctic polar regions. There is a marked contrast in the literature between the amount of information on microalgae vs. macroalgae. Perhaps not surprising in view of their size and conspicuous nature, the macroalgae are better known than the microalgae an...
Article
Full-text available
Cocconeis costata var. subantarctica var. no v., a rare taxon from the Kerguelen Archipelago (Southern Ocean, Indian sector), is described using light and scanning electron microscope observations and was compared to related taxa. Apart from the wide-elliptical central area devoid of striae, the raphe valve features highly resemble those of the C....
Poster
Faisant partie de l’archipel des Mascareignes (Océan Indien), Rodrigues est la plus petite des trois îles (109 km2), et située la plus à l’Est (800 km de la Réunion et 1400 km de Madagascar). Cette île d’origine volcanique, comme tout l’archipel, est également la plus ancienne et possède le système récifal le plus étendu avec une vaste zone lagonai...
Conference Paper
Full-text available
Nous remercions l'UMR 7621 CNRS (LOBB, Banyuls/mer), Naturalia&Biologia, Dimitri Gorand pour son assistance au MEB (C2M Université de Perpi-gnan) et tous ceux qui ont aidé C. R.-G. dans le repérage des sites, i. e. les mangroves et récifs de Rodrigues, particulièrement Santos Meunier. n=13 5,93 1,67 36,60 0,75 0,22 0,00 L l Str n=3 n=3 Faisant part...
Article
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Littoral diatoms were studied in two locations in the Shatt Al-Arab estuary, North West Arabian Gulf, a eutrophic brackish to marine environment whose diatom flora appears to be poorly known. A total of 170 taxa belonging to 70 genera were identified and documented by light microscopy. Large numbers of freshwater taxa washed down from the inland wa...
Article
Full-text available
This paper reviews the composition, biogeography and zonation of benthic algae in Arctic and Antarctic polar regions. There is a marked contrast in the literature between the amount of information on microalgae vs. macroalgae. Perhaps not surprising in view of their size and conspicuous nature, the macroalgae are better known than the microalgae an...
Article
Full-text available
Two new marine diatom species, Cocconeis melchioroides and C. dallmannii are described from Potter Cove, King George Island, Antarctica. Detailed descriptions are given based on LM and SEM images for both species and compared with the only known morphologically related taxon, Cocconeis melchiori Frenguelli and Orlando. Both C. melchioroides and C....
Article
Full-text available
The composition of phytoplankton species thriving in Wadi Al-Arab Dam Reservoir, Jordan and their seasonal variation in relation to water ecology were studied between February 2001 and February 2002. A total of 75 species of phytoplankton were identified: Bacillariophyceae (diatoms) contributed with the highest number of taxa (39) followed by Chlor...
Article
Full-text available
Marine epiphytic diatoms in the Antarctic Peninsula have not been studied in detail previously, and information on their distribution and occurrence is scarce. We studied the marine epiphytic diatoms on several species of macroalgae belonging to the Rhodophyta, Phaeophyceae and Chlorophyta. We recorded a total of 50 epiphytic diatoms, with Cocconei...
Article
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The purpose of this study was to investigate the effect of the primary production of phytoplankton on water quality of Wadi Al-Arab Dam Reservoir in Northern Jordan. Species successive change and composition in addition to increased rain inflow and nutrient loading seems to be the major factors behind fluctuation of total chlorophyll a (chl a) cont...
Article
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This investigation was motivated by the lack of ultraviolet radiation (UVR, 280–400 nm) studies on Antarctic benthic marine microalgae. The objective was to estimate the impact of UV-B (280–315 nm) and UV-A (315–400 nm), on photosynthetic efficiency, species composition, cell density and specific growth rate in a semi-natural soft-bottom diatom com...