Impact of the climate change on the West coast of Algeria: Gulf of Oran, Arzew and Mostaganem.

Different hydro climatic conditionsat and above a continental shelf have significant effects on the ecology of theenvironment (temperature, nutrient richness and pelagic production). Indeed,bioclimatic changes defined clearly reflects the prevailing conditions imposedabove the continental shelf. Based on contributions made to the sea (rainfall,temperature, wind ...) and those put together by the internal dynamics can bedistinguished marine years that correspond to low enrichment in terms of anychange in continental and marine conditions generally short and strongenrichment of years corresponding to eventful years and transformations ofcontinental and marine conditions, strong shifts in time. Thus, a hot or coldbut very fluctuating period influence the marine ecosystem and phytoplankton growth. Also, the impact of development on the coastal and marine environmentis localized mainly in the coastal metropolitan areas characterized by highurbanization and concentration of activities. Keywords:climate change; environmental variability; Ecosystem vulnerability; West coastof Algeria

Checklist of gastropod molluscs in west coast of Algeria

Samplings were performed during 2015-2019 from the rocky intertidal zone of the west coast of Algeria to determine its gastropods' inventory. The regular survey from 18 stations revealed the presence of 28 species belonging to 12 families. The patellids was most diverse family with 17.85% of the total sampled gastropods, followed by Buccinidae (14.28%), Trochidae (14.28%), Muricidae (10.71%), Mitidae (7.14%), Certhiidae (7.14%), Vermetidae (7.14%), Aplysiidae (7.14%), Cymatiidae (3.57%), Haliotidae (3.57%), Calliostomatidae (3.57%) and turbinids (3.57%). In addition, the Crustaceans living under these mollusk shells were reported

Biodiversity of Echinological Fauna of Hard Substrates of the Algerian West Coast

Echinoderms, exclusively marine animals, present a great diversity and are an important and very ancient phylum. Whether they are predators, vegetarian or scavengers, echinoderms frequently dominate the ecosystems in which they are subservient. Benthic macrofauna and particularly echinoderms acting directly on the functioning of marine ecosystems, represents the fundamental link in the food chain and an essential source of food for many consumers. There has been very little work on the echinoderms found in the western Algerian coast. The objective of this work is to conduct an inventory on the echinological fauna in the intertidal zone, including the description of the morphological and ethoecological characteristics of the echinoderms in their ecosystem. To this end ten stations were surveyed. For each station, a random sampling was performed on hard substrates found in the coast of Oran. The identification of species and faunal analysis permitted to identify six species belonging to this phylum with a presence of 55.17% of Echinoids (Echinoids), 34.8% of sea cucumber (holothurian

Current Situation of Stramonita heamastoma (Linnaeus 1758) (Gasteropod Mollusk) in the Western Coast of Algeria

Stramonita heamstoma is carnivorous gastropod mollusk who is feeding on bivalves and sessile macrofauna. The ecobiological study of this gastropod on the Algerian west coast has demonstrated the presence of significant populations in the zone Z3 with a density of 1,117 ind / mlc, as saying in the other study areas (Z1 and Z2), populations are less significant. This species shares the rock substrate with other mollusks and obeys all anthropogenic pressures that act more or less on their survival

Assessment of the Physico-Chemical Quality and the Level of Metallic Contamination of the Dismissals of Sloppy Waters of Oran (Algerian West Coastline)

The coastal areas are the locus of activities requiring water of good physicochemical quality: recreational uses, aquaculture and fishing. Thesis areas are under the direct influences of wadis and wastewaters, which pass by the contributions of watersheds, urban and industrial discharge. Thesis discharges result, when the renewal of water masses is small compared to release, significant deterioration of water quality and marinades ecosystem. This study focuses one year assessment of water quality urban sewages from coastal urban centers western (Oran), with the aim of assessing the state of contamination by draws metals (Cd, Pb Zn and), have well ace the assessment of the physico-chemical quality of marinades waters to determines the potential impact of metal pollution one the west coast Algeria of. Lead has average concentrations high enough at the three studied sewages: 0.23 mg.l-1 at the urban sewage Oran of (standard deviation: 0.22 mg.l-1).Yew heavy metal concentrations vary greatly from one sample to another; have reflected in the standard deviations, no lasting changes obvious is. Only average levels of cadmium exceeding the normative

Study of the Antimicrobial and Probiotic Effect of Lactobacillus Plantarum Isolated from Raw Goat's Milk from the Region of Western Algeria

The evolution from a spontaneous fermentation to a directed one is realised with selected lactic starters which give many dairy products processing various organoleptic characters. The integration of new lactic acid bacteria strains isolated from diverse ecosystems is now used to increase the duration of bio-preservation of dairy products. Moreover, some lactic acid bacteria probiotic activity is exploited to produce functional food. The aim of this study is the research of the possible probiotic and technological potential with some preventive and therapeutic characteristics of some Lactobacillus species isolated from Algeria

Diversity of Nematodes from the greater forkbeard Phycis blennoides (Teleostei: Gadidae) in the Western Mediterranean Sea

The parasitological examination revealed the presence of 236 nematodes parasitizing the digestive tract of 110 greater forkbeard Phycis blennoides from the western Algerian coasts. Eight species belonging to five different families of nematodes were identified: Anisakis simplex, Anisakis physeteris, Hysterothylacium aduncum, Hysterothylacium fabri, Hysterothylacium sp, Ascarophis collaris, Cucullanus cirratus and Capillaria gracilis, these two latest species were recorded for the first time in western Mediterranean and Phycis blennoides represents a new host record

Checklist of helminth parasites of Striped Red Mullet, Mullus surmuletus (Linnaeus, 1758) (Perciformes: Mullidae), caught in the Bay of Kristel , Algeria (western Mediterranean)

This investigation on the parasitic biodiversity of Striped Red Mullet, Mullus surmuletus, revealed the presence of 14 parasite species, including seven species of Digenea, four species of Nematoda, two species of Acanthocephala, and one Cestoda. Opecoelides furcatus and Proctotrema bacilliovatum are the most prevalent digenean species, present in 70% and 17% of the fish specimens analyzed, respectively. Concerning nematode species, Hysterothylacium fabri, Ascarophis valentina and Cucullanus longicollis have shown a prevalence of 66%, 17% and 8% respectively, among all specimens of M. surmuletus analyzed

Impact of Desalination of Sea Water on a Coastal Environment of Chatt El Hillal (Beni Saf

Around the Mediterranean coast, 79% of the production of fresh water is assured by reverse osmosis (SWRO). The great units are located in Spain, Israel and in Algeria, who chose the desalination of sea water as solution to solve the problems of drinking water shortage. Desalination thus will be essential like a resource alternative essential with the perenniality of great coastal cities where the need is felt. For to illustrate its strategic importance from now on it desalination became a vital need for great Algerian urban cities of the Mediterranean coastal such as Oran, Algiers, and Arzew. A number which the authorities aim to increase to 43 by 2019 but much of questions is currently posed on the impact of these installations on the environment. The principal environmental impact associated the processes of desalination comes from the production of the brine (salt concentrations maximum 36375mg/l). The other environmental impacts are: problems of landscape degradation, harmful effects sound, the emission of gas, or discharges associated like water coming from cleaning with the filter

Bacteriological Quality of Seawater Bathing Areas along the Oran Coast (West northern Algeria)

Marine water of Ora