Biodiversity of diatom assemblages in a Mediterranean semiarid stream: implications for conservation

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dc.contributor.authorRos, María Dolores
dc.contributor.authorAboal, Marina
dc.contributor.authorMarín Murcia, José Pedro
dc.date.accessioned2024-02-04T23:37:46Z
dc.date.available2024-02-04T23:37:46Z
dc.date.issued2009-01-29
dc.description.abstractMany semiarid streams are threatened both by human demands and climatic effects (global warming), but little is known about their algal biodiversity and their conservation value, especially in Mediterranean areas. The aim of the present study was to evaluate annual changes in the structure and species richness of diatom communities in runs and pools of an oligohaline, semiarid stream in south-eastern Spain, and their relationship with nutrients and hydrology. The pool substrate was covered most of the time by a yellow-brown coat, mainly composed of diatoms and a few cyanophytes (Leptolyngbya). In the runs, cyanophytes were dominant (Rivularia) and diatoms occurred as epiphytes. The diversity of these diatom assemblages was high, particularly in the pools. Some species were present throughout the year, whereas others showed a bimodal growth pattern. Maximum biomasses were reached in summer in the pools and in autumn in the runs, when levels of phosphorus increased as a result of flooding. Species richness and diversity were correlated with hydrology and sulfate concentrations, whereas biomass (as chlorophyll a and ash-free dry weight) was associated with variations in temperature, conductivity and ammonium. These semiarid streams are refuges of biodiversity, representing habitats reliant on cycles of drought and floods, which should be considered in proposals for their conservation.
dc.description.departmentDepto. de Biología Celular
dc.description.facultyFac. de Ciencias Biológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Educación. Gobierno de España.
dc.description.statuspub
dc.identifier.citationRos M. Dolores, Marín-Murcia José Pedro, Aboal Marina (2009) Biodiversity of diatom assemblages in a Mediterranean semiarid stream: implications for conservation. Marine and Freshwater Research 60, 14-24.
dc.identifier.doi10.1071/MF07231
dc.identifier.issn1323-1650
dc.identifier.officialurlhttps://www.publish.csiro.au/mf/MF07231
dc.identifier.urihttps://hdl.handle.net/20.500.14352/98599
dc.issue.number1
dc.journal.titleMarine and Freshwater Research
dc.language.isoeng
dc.page.final24
dc.page.initial14
dc.publisherCSIRO Publishing
dc.relation.projectIDCYCIT (R+D) grant (AMB93-0579).
dc.rights.accessRightsrestricted access
dc.subject.cdu582.261/.279 Algae
dc.subject.cdu574 General ecology and biodiversity
dc.subject.keyworddynamics
dc.subject.keywordSouth-eastern Spain
dc.subject.ucmBotánica (Biología)
dc.subject.ucmMedio ambiente natural
dc.subject.ucmEcología (Biología)
dc.subject.unesco2417.04 Limnología
dc.subject.unesco2417.91 Flora Mediterránea
dc.subject.unesco2417.07 Algología (Ficología)
dc.titleBiodiversity of diatom assemblages in a Mediterranean semiarid stream: implications for conservation
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number60
dspace.entity.typePublication
relation.isAuthorOfPublication99cc929e-628a-40e2-bea7-b2144535bffd
relation.isAuthorOfPublication.latestForDiscovery99cc929e-628a-40e2-bea7-b2144535bffd
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