Distribution of Fresh-Water Mollusks of the Gharb  Area (Morocco)

Barkia, Hicham; Barkia, Abdelaziz; Rajae, Yacoubi; Guamri, Youssef El; Tahiri, M.; Kharrim, Khadija El; Belghyti, Driss

doi:10.3390/environments1010004

Cited by 5 publications

(6 citation statements)

References 5 publications

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“…This investigation found only one species of Bulinus which correlates with those of the studies by Ektefa (8) and Mansoorian (6,22). Moreover, the study found a species of Physa which is in agreement with the studies by Mansoorian (6,22), Mowlavi (7), Barkia and Maqboul in Morocco (4,24) and Spyra in Poland (23); while the finding does not correlate with the studies by Afshan (3), Kebapci and Kucharz (11,19) which found two species. The study by Ektefa (8) showed three species of Planorbis, and the study by Kebapci highlighted two species (19).…”

Section: Discussionsupporting

confidence: 75%

“…Sampling time was one hour per site (3). The snails were collected by hand and square net (4). The samples were placed in screw cap plastic containers containing 70% ethyl alcohol for 24 hours (10).…”

Section: Collection Of Snailsmentioning

confidence: 99%

“…Till now, many species of snails with medical importance are discovered in the world (3,4). There is a need for preventive measures to control snails (5).…”

Section: Introductionmentioning

confidence: 99%

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Identification of Medically Important Snails of Miangran Lake in Izeh, Khuzestan Province of Iran

Nouroozi¹

2015

Avicenna J Clin Microbiol Infect

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Background: Some freshwater snails are acting as intermediate hosts for digenetic trematodes. Studies on distribution of freshwater snails are important to determine the transmission patterns of the trematoda. Objectives: The current study aimed to identify medically important snails of Miangran Lake in Izeh, Khuzestan province, Iran. Materials and Methods: Sampling was conducted in fourteen sites around Miangran Lake in 2014. The collected samples were placed in plastic containers containing 70% ethyl alcohol, prior to consideration. The identification was carried out according to shell characteristics. Data were analyzed descriptively. Results: All sampling sites were positive for medically important snails. Overall, nine genera and thirteen species were identified. The most diversity in genus was found in Melanopsis. Five genera of snails detected in the study with known medical importance include: Bithynia spp., Bulinus spp., Lymnaea spp., Melanoides spp. and Melanopsis spp. Melanoides spp. was observed in thirteen and Bellamya spp. was identified in two sites. Also, in this study Melanoides spp., Bulinus spp., and Lymnaea spp. were widespread snails around Miangran Lake. Conclusions: The reason for difference in the detected snail genera in sampling sites may be due to various physicochemical factors. According to the current study, medically important snails exist in Miangran Lake and they could be a source of trematode infections for the local people. Controlling measures after comprehensive studies should be applied.

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Section: Discussionsupporting

confidence: 75%

Section: Collection Of Snailsmentioning

confidence: 99%

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Identification of Medically Important Snails of Miangran Lake in Izeh, Khuzestan Province of Iran

Nouroozi¹

2015

Avicenna J Clin Microbiol Infect

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“…Pengambilan sampel gastropoda dilakukan pada lima plot berukuran 1 × 1 m yang didirikan secara random pada setiap stasiun. Sampel gastropoda dikoleksi menggunakan ayakan atau drag sampler yang ditarik secara perlahan pada bagian dasar, permukaan batu atau pinggiran sungai (Barkia et al 2014) Uji diversity t-test digunakan untuk mengetahui perbedaan signifikansi diversitas antar stasiun. Kluster analisis menggunakan indeks Bray Curtis dilakukan untuk mengambarkan hubungan antar stasiun berdasarkan kesamaan komposisi jenis.…”

Section: Bahan Dan Metodeunclassified

Keanekaragaman dan Distribusi Gastropoda Air Tawar di Sungai Ciapus, Jawa Barat, Indonesia

Putra,

Al Anshari,

Sukri

et al. 2023

JSDH

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Despite being part of food web and bioindicator in freshwater ecosystems, gastropods are globally jeopardized. Therefore, the occurence of freshwater gastropods need to be assessed. This research aimed to examine diversity and distribution of freshwater gastropods along the Ciapus River in Bogor, West Java, Indonesia. The research was conducted from February to May 2020. Sampling was carried out within limited 15 minutes time period using five 1 × 1 m plots established at each of four survey stations. Gastropods were collected from the bottom of river, rock surface and riverbanks within 15-100 cm of water depth. Environmental parameters were recorded. Data was analyzed using biodiversity index parameters and diversity t-test. The survey collected a total 587 individuals from 7 species of freshwater gastropods. The abundance, species richness and diversity of gastropods in the Ciapus river were different between upstream and downstream, location with high altitude tend to have low number of species. Glyptophysa stagnalis became the only species recorded from upstream area. Meanwhile, there were 4 species, which were collected in other three stations and 2 species that recorded from two stations. In three stations, Tarebia granifera was the most dominant species.

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“…In particular, diversity in vegetation and substrates has been found to account for differences in riverine mollusk communities (Maqboul et al, 2014;Reckendorfer et al, 2006). In addition, climate conditions and anthropogenic influences play also an important role in shaping modern distribution patterns of freshwater mollusks (Barkia et al, 2014;Van Bocxlaer et al, 2015;Beracko et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Mollusk communities of the central Congo River shaped by combined effects of barriers, environmental gradients, and species dispersal

et al. 2017

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Rapids, falls, and cascades might act as barriers for freshwater species, determining the species community up-and downstream of barriers. However, they affect community composition not only by acting as barriers but also by their influence on environmental gradients. Moreover, the directional dispersal of species along the watercourse might determine community composition. A suitable system to study these differential effects is the Congo River, the world's second largest river by discharge. The small 'Upper Congo Rapids' ecoregion features several rapids known as barrier for fish. The Wagenia Cataract at the town of Kisangani constitutes the strongest drop of the Congo River and several studies have emphasized its role as barrier for fish distribution. Alternative explanations for this pattern, however, are rarely evaluated. Though mollusks represent a vital component of the macrozoobenthos, with distribution patterns and underlying drivers often distinct from that of fishes, virtually no field surveys of the Congo River have been reported for decades. We collected and determined mollusks of 51 stations, recorded environmental conditions, and generated proxies for directional species dispersal and an indirect barrier effect. Those variables were subjected to distance-based redundancy analyses and variation partitioning in order to test whether the mollusk community compositions are better explained by an individual or combined influence of the direct and indirect effect of the cataract barrier, environmental conditions, and downstreamdirected dispersal. Our survey showed an exclusive upstream/downstream distribution for just four out of the 19 species, suggesting a limited barrier effect. We revealed no direct influence of the barrier itself on community composition but of substrate type. However, we found an indirect effect of the barrier through replacing spatially structured communities upstream of the cataract with more uniform ones downstream. Downstream-directed dispersal explained the highest fraction of variation in mollusk communities. Thus, environmental factors, the indirect cataract effect, and downstream-directed spatial proxies model mollusk community composition in concert. These results support previous studies showing a multi-factorial imprint on communities. However, a large fraction of variation community composition remained unexplained, potentially due to flood plain dynamics that (re-)shape mollusk communities constantly and a high temporal turnover, evidenced by the comparison with historical surveys. This is likely caused by the growth of Kisangani and resulting human activities. A monitoring system could allow better assessments of these impacts on communities and the conservation status of endemic species in the Wagenia Cataract.

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Distribution of Fresh-Water Mollusks of the Gharb Area (Morocco)

Cited by 5 publications

References 5 publications

Identification of Medically Important Snails of Miangran Lake in Izeh, Khuzestan Province of Iran

Identification of Medically Important Snails of Miangran Lake in Izeh, Khuzestan Province of Iran

Keanekaragaman dan Distribusi Gastropoda Air Tawar di Sungai Ciapus, Jawa Barat, Indonesia

Mollusk communities of the central Congo River shaped by combined effects of barriers, environmental gradients, and species dispersal

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