Ecological Analysis of Periphytic Diatoms in Mediterranean Coastal Wetlands (Empordà Wetlands, NE Spain) PDF Download
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Author: Rosa Trobajo Pujadas
Publisher:
ISBN: 9788469238011
Category :
Languages : en
Pages :
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Book Description
Author: Rosa Trobajo Pujadas
Publisher:
ISBN: 9788469238011
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
RESUM Shan estudiat els efectes dels factors ambientals sobre el perífiton dels sistemes lenític fluctuants del aiguamolls de lEmpordà. Lestudi sha realitzat als tres nivells dintegració: nivell decosistema considerant el rol del perífiton envers els altres productors primaris; a nivell de comunitat, estudiant la composició específica de les diatomees i a nivell de població estudiant la plasticitat fenotípica duna espècie de diatomea (Nitzschia frustulum). A nivell decosistema sobserva que els factors que afavoreixen el predomini dels diferents tipus de productors primaris (perífiton, fitoplàncton i macròfits) són la renovació i el grau deutròfia de laigua. A nivell de comunitat els factors determinants en la composició i distribució de les espècies de diatomees són els gradients confinament-inundació així com la productivitat del sistema. En funció daquest factors shan establert 5 associacions de diatomees. A nivell de població es demostra que tant la salinitat, com la relació N : P a laigua com el moviment de laigua afecten la morfologia i ultraestructura de la valva de N. frustulum. De forma interessant sobserva que la salinitat, considerada com a factor individual, afecta N. frustulum a nivell poblacional provocant-li modificacions en la morfologia de la valva, per en canvi, no afecta a nivell de comunitat, ja que totes les espècies de diatomees presents en ambients de salinitat fluctuant són eurihalines. ABSTRACT The effects of environmental conditions on periphytic of lentic and fluctuating waters (Empordà wetlands) at the three different levels of organisation were studied: at ecosystem level, considering the role of periphyton among the primary producers; at community level, analysing the periphytic diatom species composition; and at population level studying the phenotypic plasticity of a selected diatom species (Nitzschia frustulum). The factors favouring the predominance of different primary productors (periphyton, phytoplankton and macrophytes) were the.
Author: Rosa Trobajo Pujadas
Publisher: Gantner Publishing
ISBN:
Category : Nature
Languages : en
Pages : 224
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Book Description
Study of Diatoms in the Wetlands and Salt Marshes ofNE Spain. Another volume in the series Diatom Monographs.
Author: Janina Kwandrans
Publisher: Koeltz Scientific Books
ISBN: 9783906166568
Category : Acid pollution of rivers, lakes, etc
Languages : en
Pages : 388
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Author: Krisztina Buczkó
Publisher: Springer Science & Business Media
ISBN: 9048133874
Category : Science
Languages : en
Pages : 325
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Book Description
Palaeolimnology is one of the most rapidly developing fields of limnology. The primary objective of this volume is to present new palaeolimnological findings from eastern and central Europe. Although this area has sometimes received less attention than other areas of Europe, the lakes and mires, coupled with the variability in landscape and the local differences in climate, provide unique opportunity for studying palaeolimnology. The volume starts with a review on late Quaternary records form the Carpathian region, followed by new results on the history of a crater lake, Lake Saint Ana, glacial lakes in the Tatra Mountains and Lake Bled in Slovenia. In addition, the various papers provide new insights on the development of lakes and bogs during the late glacial and Holocene, using a wide range of palaeolimnological proxies, including diatoms, pollen, macrofossils, pigments, cladoceran remains, chironomids, chaoborids, stable isotopes and geochemistry. The motivation for collecting recent knowledge derives from the recognition of the importance, and applicability of palaeolimnological tools to help in defining "reference conditions" as designated within the Water Framework Directives and estimating influence of global climate change on surface waters.
Author: Andrzej Witkowski (dr ichtiologii.)
Publisher:
ISBN:
Category : Diatoms
Languages : en
Pages : 532
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Author: Gabriel Cristóbal
Publisher: Springer Nature
ISBN: 3030392120
Category : Science
Languages : en
Pages : 294
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Book Description
High-resolution images of phytoplankton cells such as diatoms or desmids, which are useful for monitoring water quality, can now be provided by digital microscopes, facilitating the automated analysis and identification of specimens. Conventional approaches are based on optical microscopy; however, manual image analysis is impractical due to the huge diversity of this group of microalgae and its great morphological plasticity. As such, there is a need for automated recognition techniques for diagnostic tools (e.g. environmental monitoring networks, early warning systems) to improve the management of water resources and decision-making processes. Describing the entire workflow of a bioindicator system, from capture, analysis and identification to the determination of quality indices, this book provides insights into the current state-of-the-art in automatic identification systems in microscopy.
Author: Antoni Munné
Publisher: Springer
ISBN: 3319238957
Category : Science
Languages : en
Pages : 337
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Book Description
This book details the experiences gained by the Catalan Water Agency (ACA) in a Mediterranean watershed – the Catalan River Basin District – following the launch of the EU Water Framework Directive (WFD) in the year 2000. Experts in rivers, reservoirs, lakes, wetlands and estuaries present 13 chapters defining tools for water-status assessment specially adapted to Mediterranean conditions. The content of this and the companion volume Experiences from Ground, Coastal and Transitional Water Quality Monitoring: The EU Water Framework Directive Implementation in the Catalan River Basin District (Part II) are the result of an excellent collaboration between the ACA and several Catalan universities and research centers to cope with new challenges provided by the WFD monitoring requirements. The volume serves as a useful guide for environmental managers and scientists engaged in other European as well as Non-European river basins.
Author:
Publisher:
ISBN:
Category : Aquatic biology
Languages : en
Pages : 604
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Author: Dermot Antoniades
Publisher: Gantner Publishing
ISBN:
Category : Nature
Languages : en
Pages : 664
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An introduction to Ellef Ringnes Island, Prince Patrick Islandand Northern Ellesmere Island. From the preface This project was initiated in 1998 with the development of a surface diatomcalibration set for selected regions from the Arctic Islands.Under the study surface sediments, mosses,rock and otheravailable habitats were studied from 91 ponds and lakes.It became clear that the diatoms observed were new or undocumented. Detailed taxonomic studies were done at the Canadian Museum of Nature using SEM generated images andthe extensive Library. A must have for research in the Arctic
