Pattern and process in the biogeography of subterranean amphipods

Holsinger, John R.

doi:10.1007/bf00006902

Cited by 78 publications

(52 citation statements)

References 18 publications

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“…Ainsi, en Amérique de nombreuses études ont été entreprises, notamment par Bousfield (1958), Maguire (1964), Holsinger (1972Holsinger ( , 1986Holsinger ( , 1994Holsinger ( , 2000, Culver (1982), Koenemann & Holsinger (2001), et en Afrique subsaharienne par Magniez (1979) et récem-ment par Zébazé-Togouet et al (2009).…”

Section: Introductionunclassified

Faune aquatique et qualité de l’eau des puits et sources de la région d’Oum-El-Bouaghi (Nord-Est algérien)

et al. 2010

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Résumé -Une étude récente réalisée dans la région d'Oum-El-Bouaghi, dans le Nord-Est de l'Algérie, avait comme objectif de rechercher et de préciser la relation pouvant exister entre la qualité de l'eau des puits et des sources et la diversité de la faune aquatique présente dans ces habitats. Pour cela une quinzaine de stations (16 puits et 2 sources) ont fait l'objet, périodiquement, d'une étude de la qualité de l'eau et d'un échantillonnage de la faune. Les stations retenues ont été choisies en raison de la diversité de leur faune mais aussi et surtout parce qu'elles présentaient entre elles certaines différences évidentes (profondeur de la nappe, nature du substratum, protection des puits et utilisation de l'eau par la population locale), qui pouvaient laisser espérer une certaine diversité. Les principales composantes physico-chimiques de la qualité de l'eau ont donc été mesurées puis une analyse en composantes principales (ACP) a été réalisée à partir des valeurs moyennes de chaque paramètre ; on a pu révéler ainsi l'existence d'une variation spatiale relativement marquée de ces descripteurs, faisant apparaître quatre groupes de stations très inégaux et bien différenciés : un premier groupe de 11 puits situés à l'aval hydraulique de la zone d'étude, où l'eau présente des teneurs élevées en ions azotés et phosphorés indicateurs de pollution ; à l'opposé un autre groupe de 5 puits, situés plus en amont, où l'eau présente au contraire de faibles concentrations de substances azotées et d'ions phosphorés, donc des stations peu ou pas polluées ; enfin deux autres groupes bien séparés, chacun correspondant à une source, dont l'eau est aussi de qualité relativement bonne. La faune aquatique de ces puits et sources a également été échantillonnée de façon périodique. La richesse faunistique globale des stations apparaît faiblement corrélée avec la qualité de l'eau, mais en revanche la richesse spécifique de la faune stygobie (celle qui vit dans la nappe phréatique) et plus encore l'abondance de ces espèces stygobies, diminuent de Article publié par EDP Sciences façon significative avec la pollution. La faune stygobie dans son ensemble, et particulière-ment le groupe des Crustacés péracarides, apparaît ainsi comme un très bon indicateur de la qualité de l'eau de ces puits et des sources. Mots clés -biodiversité, puits, faune stygobie, espèces indicatrices, qualité des eaux souterrainesAbstract -A recent study, performed in the region of Oum-El-Bouaghi, North-Eastern Algeria, aimed at showing the possible relationships between the water quality of wells and springs and the diversity of the aquatic fauna which occurs in these habitats. To this end, the water quality and the fauna were regularly investigated in several stations (16 wells and 2 springs) selected in the region. The stations were chosen considering visible differences related to both their fauna and also some evident characteristics i.e. water table depth, nature of geological substratum, protection and human use, so that it was possible to expect certain d...

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Section: Introductionunclassified

Faune aquatique et qualité de l’eau des puits et sources de la région d’Oum-El-Bouaghi (Nord-Est algérien)

et al. 2010

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“…Areas presently land that were ever covered by the DOI: 10.18195/issn.0313-122x.64.2001.063-083 sea, even as far back as the Mesozoic, often contain communities of obligate subterranean aquatic species of formerly marine lineages 'stranded' inland by marine recession (Stock, 1980;Boutin and Coineau, 1990;Notenboom, 1991;Holsinger, 1994), particularly in karst areas. This is especially nota~le in regions that have undergone substanhal orogenesis (Messouli et al, 1991;Boutin, 1993).…”

Section: Introductionmentioning

confidence: 99%

Groundwater calcrete aquifers in the Australian arid zone: the context to an unfolding plethora of stygal biodiversity

Humphreys¹

2001

Rec West Aust Mus Sup

104

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-The Western Shield of Australia has been above sea level since the Palaeozoic. It is incised by ancient palaeovalieys now containing groundwater calcretes that are found throughout much of arid Australia. The calcretes are deposited, owing to surface evaporation, from a groundwater flow path that increases in salinity from fresh to hypersaline groundwater each terminating at a salt lake (playa). The calcrete aquifers contain a diverse obligate groundwater fauna (stygofauna: predominantly Crustacea) in one of the oldest non-marine landscapes on Earth. Each of the 11 calcrete areas examined so far contains a unique fauna; there are over 210 large discrete calcrete bodies in the Western Australian arid zone. This paper examines a working hypothesis that the stygofauna became isolated in the upper tributaries of the palaeodrainage systems by the progressive upstream movement of salinity from the Eocene onwards. Although each calcrete body does have a unique fauna, as predicted by the hypothesis, the hypothesis has proved too simple because the hydrochemical cycles are repeated along the length of the palaeochannels, each terminating in a saltlake immediately downflow of the calcrete. A new hypothesis has to incorporate these intervals of hypersaline groundwater / calcrete discontinuities acting as barriers to dispersal of the stygofauna. The paper focuses on the geological and landscape setting, and the hydrochemical and groundwater context in which this stygal diversity is found. It is intended to serve as a background resource for further work on this diverse stygofauna. A synopsis is provided of the knowledge of this stygofauna. The presence of such highly diverse and locally endemic stygofauna, often ancient relictual lineages, in a major economic resource within arid Australia poses delicate and chalienging conservation issues. At the same time the scientific challenge is considerable to understand the development and functioning of these systems in order that they can be managed sustainably.

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“…When comparing this amphipod diversity across geographical regions, the Caribbean has a larger diversity than the Patagonian Shelf (98 species) and the Tropical West Atlantic (107 species taxa, whose present distribution and biogeographic pattern reflect their origin. In the case of marine and brackish species, it has been suggested that they may have derived from epigean marine or brackish water ancestors as they adapted to fluctuating sea levels, and even some freshwater species may have derived from marine and brackish species that were caught inland during regression of seawater (Holsinger, 1994;Biernbaum, 1996), in both cases leading to speciation by isolation.…”

Section: Discussionmentioning

confidence: 99%

Diversidad regional de Amphipoda en el Mar Caribe

Martín

Díaz

Miloslavich

et al. 2013

RBT

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Diversidad regional de Amphipoda en el Mar Caribe. The order Amphipoda is one of the most diverse within Peracarids, and comprises 6 950 described marine species. Amphipod research in the Caribbean Sea began in the late 1 800s, but has increased significantly since 1 980. In this study, we analized the amphipod biodiversity (Caprellidea, Gammaridea, Hyperiidea, and Ingolfiellidea) of the Caribbean Sea. For this, we compiled available data on species diversity of marine amphipods (data bases: WoRMS and OBIS and published species lists) into a comprehensive taxonomic list by country for the ecoregions of the Caribbean. Additionally, we analized the relative contribution of each country to regional diversity and the rate of discovery of new species. The Caribbean amphipod fauna is composed of 535 species within 236 genera and 73 families for the higher taxon. The Western Caribbean ecoregion holds the largest diversity (282 species), while the Eastern Caribbean recorded the lowest one (73). Mexico and Venezuela recorded the largest number of species with 266 and 206, respectively. Twelve countries had less than 50 species. The richest suborder is the Gammaridea with 381 species followed by the suborder Hyperiidea with 116. From the total of 535 amphipod species reported for the Caribbean region, 218 have the Caribbean as the holotype locality, and 132 are endemic (about 25% of the total). Areas of higher diversity seem to be concentrated along the Mexican Caribbean, Cuba and the Northern coast of South America (VenezuelaColombia); however, such pattern is most likely reflecting local collection efforts and taxonomic expertise rather than actual distribution. Knowledge of amphipod species is mostly limited to shallow, near-shore waters, with little information available on the deep sea fauna. Regional research priorities for this group should be focused on completing shallow water coastal inventories of species in Central America and the Greater and Lesser Antilles. In addition, sampling the deep sea ecosystems should follow along with other particular habitats such as anchialine cave systems. It is also neccessary to increase ecological research efforts, mainly in some speciose suborders, including the Caprellidea and Hyperiidea, known to exhibit high diversity in other tropical localities. Rev. Biol. Trop. 61 (4): 1681-1720. Epub 2013 December 01.

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Pattern and process in the biogeography of subterranean amphipods

Cited by 78 publications

References 18 publications

Faune aquatique et qualité de l’eau des puits et sources de la région d’Oum-El-Bouaghi (Nord-Est algérien)

Faune aquatique et qualité de l’eau des puits et sources de la région d’Oum-El-Bouaghi (Nord-Est algérien)

Groundwater calcrete aquifers in the Australian arid zone: the context to an unfolding plethora of stygal biodiversity

Diversidad regional de Amphipoda en el Mar Caribe

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