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Les Extinctions Totales Et Régionales Des Grands Mammifères Durant Le Quaternaire Terminal Au Maroc

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Les Extinctions Totales Et Régionales Des Grands Mammifères Durant Le Quaternaire Terminal Au Maroc Travaux de l’Institut Scientifique, Série Générale, 2015, N° 8, 5-20 Les extinctions totales et régionales des grands mammifères durant le Quaternaire terminal au Maroc Total and regional extinctions of large mammals during the Late Quaternary in Morocco Brahim OUCHAOU* & Bouchra BOUGARIANE Université Moulay Ismaïl, Faculté des Sciences, Département de Géologie, B.P. 11201, Zitoune, Meknès, Maroc ([email protected] & [email protected]) Résumé : La comparaison de la liste des grands mammifères sauvages actuels du Maroc avec les listes établies sur la base de données paléontologiques (Pléistocène terminal et Holocène) et rupestres met en évidence un grand appauvrissement de la faune mammalogique du Maroc. Certaines espèces (trois au moins) présentes dans les gisements du Pléistocène supérieur n’ont jamais été identifiées dans l’Holocène et ne figurent pas dans le bestiaire de l’art rupestre. D’autres espèces, aujourd’hui absentes de l’Afrique du Nord, étaient présentes sur les terres marocaines jusqu’au Néolithique, voire l’Age du bronze (14 espèces au moins). Deux types de données sont exploités dans l’établissement de cette liste: les restes osseux exhumés des sites néolithiques et/ou protohistoriques, et les représentations rupestres gravées ou peintes. Nous considérerons également les espèces de grands mammifères éteintes régionalement durant la période historique (9 espèces) dont 5, éteintes durant le XXème siècle, sont évoquées plus en détail dans une autre contribution (Aulagnier et al. ce volume). Mots-clés : Grands Mammifères, Extinctions, Quaternaire terminal, Maroc. Abstract : The comparison of modern Moroccan wild large mammals list with those based upon paleontological and engraving stone data (Late Pleistocene and Holocene) highlights a strong impoverishment of Moroccan mammal fauna. Some species (at least three of them) known to occur in Late Pleistocene sites have never been identified in Holocene ones and do not figure in the cave art bestiary. Other species, today absent from North Africa, were present in Morocco until Neolithic or even Bronze age (at least 14 species). Two types of data have been respectively used in the establishment of this listing : exhumed bone remains from Neolithic and/or protohistoric sites as well as painted or engraved rock art. We have also considered those large mammal species that become regionally extinct during historical times (9 species) among which 5 disappeared during the XXth century are evoked in details in an other contribution (Aulagnier et al. this volume). Keywords : Large Mammals Extinctions, Late Quaternary, Morocco Abridged English version : Comparing actual list of large wild mammals in Morocco africanus, Giraffa camelopardalis, Alcelaphus buselaphus, with the lists based on the paleontological (Upper Redunca redunca, Addax nasomaculatus, Oryx dammah). Pleistocene and Holocene) and rock art (Neolithic and But, finally, we recall that several large mammals of actual Protohistoric) data shows an important depletion in Moroccan fauna are endangered (Acinonyx jubatus, Moroccan mammalogical zoocenosis. Some species are not Panthera pardus, Caracal caracal, Leptailurus serval, know in Holocene deposits but their last occurrence in North Canis aureus, Hyaena hyaena, Nanger dama, Gazella Africa, is dated as early as Late Pleistocene (Stephanorhinus cuvieri, Gazella dorcas, Ammotragus lervia). hemitoechus, Equus algericus, Megaceroides algericus). In this work, based essentially upon a bibliographical Several species now regionally extinct in Morocco are compilation, we provide an inventory of Moroccans present in North Africa until Neolithic or Protohistoric times prehistoric, specially iberomaurusians and neolithics, and (Lycaon pictus, Crocuta crocuta, Ceratotherium cottoni, protohistoric sites that have yielded remains of large Equus sp. cf. grevyi, Equus sp. cf. quagga, Hippopotamus mammals. Different Orders of large mammals are presented amphibius, Phacochoerus africanus, Cervus elaphus, according to conventional taxonomic succession: Carnivora Tragelaphus oryx and/or Tragelaphus derbianus, Bos (Felidae, Hyaenidae, Canidae, Ursidae), Proboscidea primigenius, Syncerus caffer, Connochaetes taurinus, (Elephantidae), Perissodactyla (Rhinocerotidae, Equidae) Damaliscus lunatus, Gazella atlantica). Two types of and Cetartiodactyla (Hippopotamidae, Suidae, Giraffidae, arguments are used to establish this list: the bones excavated Cervidae, Bovidae). The Bovidae family is the most frequent from archaeological deposits of Neolithic and /or and most diversified in prehistoric sites. In our paper, we Protohistoric sites and the representations, engraved or have used the new Systematic, based on molecular painted, in rock art. Note that, for unexplained reasons, some phylogeny, considering only two subfamilies (Bovinae and animals (elephant, rhinoceros, giraffe, buffalo) are much Antilopinae). The Bovinae subfamily is represented in more common in the rock art than in archaeological sites. Moroccan sites by two tribes (Tregelaphini and Bovini). The Some large mammals today absents from North Africa Antilopinae subfamily is the most diversified. It is occurred on Moroccan lands until the historic period represented by five tribes (Antilopini, Reduncini, (Panthera leo, Ursus arctos, Loxodonta africana, Equus Alcelaphini, Hippotragini and Caprini). 6 Ouchaou & Bougariane - extinctions des grands mammifères durant le Quaternaire au Maroc We have used standard abbreviations (Tab. 1) of the Regarding the historical period, the extinctions are International Union for Conservation of Nature (IUNC). We mainly due to human factors. We distinguished extinctions distinguished extinctions that occurred during the prehistoric occurred during the 20th century to indicate disastrous effect and protohistoric times from those occurred during historical of the introduction of firearms from the beginning of the times. In extinctions occurred during the prehistoric and colonial era. Intensive hunting, by off-road vehicle and protohistoric times (Tab. 2) we have distinguished the firearms has exterminated several antelopes (addax, scimitar Pleistocene and Holocene extinctions. For extinctions oryx, hartebeest). However, massacres, and exports to occurred during historic time (Tab. 3) we have distinguished Rome, of wild mammals from Morocco and North African between the extinctions occurred before and during the 20th in general, especially the felids and elephants, were very century. In these tables, in addition to scientific names, we common since antique periods and contributed probably to give common names in three languages (French, English and reduce the wild populations. Arabic) and we remind also the current status of each In addition to the extinct species, several ones are species in the Mediterranean around and in the World. presently seriously endangered. For this category, we remind The extinctions occurring during the late Pleistocene their status in Morocco, in the Mediterranean around and in result exclusively from environmental factors. Moreover, the the World (Tab. 4). As in previous tables, common names three species concerned are now extinct in the World (EX are given in three languages. Here, the human factors are category). The action of environmental factors, principally decisive, perhaps acting alone. Among the main threats are apparition of the Sahara and periodic extensions of its the deterioration of the environment and the fragmentation deserts is the most important in Holocene extinctions also. of the distribution areas of the species. However, the role of human factors is not negligible In summary, among the large mammals identified in the especially during protohistoric periods. The development of Late Quaternary prehistoric sites in Morocco or in the the Neolithic culture has renewed perception of the Neolithic and protohistoric rock art stations, 27 species are environment. The presence of domestic animals changed the extinct (18 during prehistoric times, 9 during historic times), relationship toward wild animals, especially carnivores. The and 10 species are endangered (Tab. 5). The most pastoralism mobility required control over water and plant extinctions concerns Equids and Bovids. Most of the resources. endangered species belong to Carnivores and Bovids. INTRODUCTION des représentations zoomorphes essentiellement gravées, L’Afrique du Nord est une zone clé pour la rarement peintes. compréhension des paléoenvironnements quaternaires du Dans ce travail, essentiellement une compilation pourtour méditerranéen par l’enregistrement combiné des bibliographique, nous dresserons des listes des sites du influences continentales et marines. Les dépôts littoraux de Quaternaire terminal du Maroc ayant livré des restes de la région de Casablanca ont fourni la plupart des stratotypes grands mammifères. Nous utiliserons les abréviations ayant servi à la définition des étages marins quaternaires du standards (Tab. 1) de l’Union internationale pour la Maghreb. conservation de la nature (IUCN) auxquelles nous ajoutons Du point de vue faunistique, la position géographique du la catégorie NL (non listée) pour les espèces éteintes et ne Maghreb, au nord-ouest de l’Afrique, en fait un « carrefour figurant pas sur les listes de l’IUCN. Pour les espèces ne d’espèces » incluant des formes tropicales, sahéliennes, faisant plus partie de la faune marocaine, nous donnerons méditerranéennes et eurasiatiques. Outre les fluctuations leurs statuts dans la faune actuelle du
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