DOCSLIB.ORG

Historical Background of the Trust

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Historical Background of the Trust Transylv. Rev. Syst. Ecol. Res. 8, (2009), "The Wetlands Diversity" 1 NAJAS SPP. GROWTH IN RELATION TO ENVIRONMENTAL FACTORS IN WADI ALLAQI (NASSER LAKE, EGYPT) Hoda YACOUB * * Egyptian Environmental Affairs, Nature Conservation Department, Wadi Allaqi Biosphere Reserve, Environmental Regional Building, Sadaat Road, Aswan, Egypt, [email protected] KEYWORDS: Egypt, Lake Nasser, Wadi Allaqi, Najas spp., human impacts, canonical correspondence analysis (CCA), fodder resources. ABSTRACT The study aims to evaluate the pattern of Najas spp. (aquatic plant) distribution along the shores of Allaqi, Lake Nasser, to identify the effect of physico-chemical variables on the growth and on the expansion of the plants. Najas spp. is vital for nomadic groups (Bedouins) living in the area, they harvest the plant out of lake to utilize it as fodder resource for their sheep and goats. Drought conditions that extended more than ten years increase the demands for the plants, in order to compensate the reduction of available grazing areas and the lack of grazing terrestrial plants. It was noticed that Najas growth declined in many areas in Allaqi due to anthropogenic and natural factors. Najas was exposed to negative conditions caused by human activities, including shores agriculture and fishing. The dense flocks of large migratory birds and the expansion of aquatic plants (other species of macrophytes and epiphytes) are additional factors that threat in many ways the Najas spp. presence. Environmental patterns were assessed over 17 abiotic parameters related to water (depth, temperature, pH, TDS, conductivity, dissolved oxygen, light transparency, phosphate, nitrate, nitrite, ammonium, sulphate) and hydrosoil (phosphate, nitrate, nitrite, ammonium, organic matter). Three field samplings were performed (May, July and September 2008) in the period when Najas (mainly Najas horrida which is dominant) starts and completes its life cycle; this period also represents the maximum human impact (harvesting time of Najas by Bedouins and the period of shores cultivation) covering a wide range of natural and anthropogenic conditions variations. The temporal and spatial variation of Najas spp. growth was obvious in Allaqi due to conditions related to: 1) variation in water and hydrosoil qualities caused mainly by human impacts, 2) variation in the nature and physical features of the shores, 3) mechanical damage from migratory birds and 4) competition of epiphytes and other macrophytes species for light, nutrients oxygen and space. CCA statistical technique was extremely useful in understanding the response of different Najas species growing in Allaqi (Najas horrida, Najas marina subsp. armata and Najas minor) to various conditions. It indicated that depth, TDS, water ammonium and hydrosoil phosphate are the key factors that control Najas growth in Allaqi, and this agreed with field observation, where Najas thrived and dominated in shallow sheltered areas with low nutrient contents. Remarkable reduction in Najas growth was recorded at cultivated shores, due to fertilizers reaching the water, and causing high ammonium contents. Myriophyllum spicatum known to be a sever competitor, able to grow in wide range of environmental conditions, and our study showed that Myriophyllum was more adapted to unfavourable conditions than Najas, suggesting the invasive ability of this species in the future. 2 H. Yacoub – Najas spp. growth in relation to environmental factors in Wadi Allaqi (1 ~ 40) RÉSUMÉ: Le développement des espèces de Najas en relation avec les facteurs environnementaux dans le Wadi Allaqi (Lac Nasser, Egypte). L’étude vise l’évaluation des modèles de distribution de Najas spp. (plante aquatique) le long des rives d’Allaqi, Lac Nasser ainsi que l’identification des effets des paramètres physiques et chimiques sur la croissance et l’expansion de la plante. Najas spp. est une plante vitale pour les populations nomades (Bédouins) de la région, qui ramassent la plante du lac et l’utilisent en tant que fourrage pour leurs moutons et chèvres. Les conditions de sécheresse qui se sont maintenues sur plus de dix ans ont augmenté la demande pour cette plante appelée à compenser la réduction des pâturages disponibles et le manque des plantes terrestres disponibles. Nous avons remarqué le fait que la croissance de Najas a reculé dans plusieurs régions d’Allaqi à cause des facteurs naturels et anthropogéniques. Najas a été exposée à des conditions négatives à cause des activités humaines tel que la pèche et l’agriculture littorale. Les colonies de grands oiseaux migrateurs et l’expansion des plantes aquatiques (autres espèces de macrophytes et d’épiphytes) sont d’autres facteurs qui menacent de plusieurs façons la présence de Najas spp. Les modèles environnementaux ont été évalués sur la base de 17 paramètres abiotiques liés à l’eau (profondeur, température, pH, TDS, conductivité, oxygène dissout, transparence, phosphate, nitrate, nitrite, ammoniac, sulfate) et aux hydrosols (phosphate, nitrate, nitrite, ammoniac, matière organique). Trois campagnes de prélèvement ont été entreprises (mai, juillet et septembre 2008) pendant la période dans laquelle Najas (principalement Najas horrida, qui est dominante) commence et finit son cycle de vie, période également concernée par le maximum de l’impacte anthropique (la période de cueillette de Najas par les Bédouins et la période de culture des berges) couvrant une large palette de variations des conditions naturelles et non naturelles. La variation temporelle et spatiale de l’expansion de Najas spp. a été si visible à Allaqi à cause des conditions liées à: 1) des variations dans la qualité de l’eau et des hydrosols dues principalement à l’impacte anthropique; 2) des variations des caractéristiques naturelles et physiques des berges; 3) l’altération mécanique due aux oiseaux migratoires et 4) la compétition des espèces épiphytes et d’autres espèces macrophytes pour la lumière, les nutriments, l’oxygène et l’espace. La techniques statistique CAA a été particulièrement utile dans la compréhension des réponses des différentes espèces de Najas qui poussent à Allaqi (Najas horrida, Najas marina subsp. armata et Najas minor) à des différentes conditions. Cette analyse a indiqué le fait la profondeur, TDS, l’ammoniac de l’eau et le phosphate des hydrosols sont les facteurs clef qui contrôlent la croissance de Najas à Allaqi, fait confirmé par les observations du terrain indiquant le fait que Najas s’est bien développé et a dominé les régions abritées et peu profondes avec un faible contenu de nutriments. La réduction la plus importante des effectifs de Najas a été enregistrée pour les berges cultivées à cause des engrais mobilisés dans l’eau qui ont augmenté les concentrations d’ammoniac. Myriophyllum spicatum, connu en tant que compétiteur féroce, capable de pousser dans une large gamme de conditions, a été démontré par notre étude en tant que mieux adapté que Najas aux facteurs adverses, suggérant que cette espèce pourrait devenir invasive par la suite. REZUMAT: Dezvoltarea subspeciilor de Najas în relaţie cu factori de mediu în Wadi Allaqi (Lacul Nasser, Egipt). Studiul urmăreşte evaluarea modelelor de distribuţie ale Najas spp., (plantă acvatică) în zona litorală Allaqi a Lacului Nasser, precum şi identificarea efectelor diferiţilor factori fizico-chimici asupra dezvoltării şi expansiunii acestei plante. Najas spp. este vitală pentru grupurile nomade din regiune (beduini), care o recoltează şi o folosesc pentru furajarea oilor şi caprelor. Seceta care a durat peste zece ani în zonă a făcut ca presiunea asupra acestei plante să Transylv. Rev. Syst. Ecol. Res. 8, (2009), "The Wetlands Diversity" 3 crească pentru a compensa reducerea zonelor de păşunat disponibile şi lipsa plantelor terestre. S-a remarcat faptul că Najas nu a mai crescut în mai multe sectoare din Allaqi, datorită unor factori naturali şi antropogeni. Najas a fost expusă la condiţii de mediu negative datorită unor activităţi umane, precum pescuitul şi agricultura, practicate pe lângă maluri. Coloniile de păsări migratoare mari şi invazia plantelor acvatice (alte specii de macrofite şi epifite) sunt alţi factori care ameninţă în diferite feluri prezenţa Najas spp. Modelele ecologice au fost evaluate pe baza a 17 parametri abiotici ai apei (adâncime, temperatură, pH, TDS, conductivitate, oxigen dizolvat, transparenţă, fosfat, nitrat, nitrit, amoniac, sulfat) şi hidrosolurilor (fosfat, nitriat, nitrit, materie organică). Au fost efectuate trei campanii de teren (mai, iulie şi septembrie 2008) în perioada de început şi de final a ciclului de viaţă la Najas (în special la Najas horrida, specie dominantă), perioadă vizată şi de un maxim al activităţii antropice (perioada de recoltare a plantelor de Najas de către beduini şi de cultivare a malurilor), acoperind o paletă largă de variaţii ale condiţiilor naturale şi nu numai. Variaţia temporală şi spaţială a expansiunii Najas spp. a fost vizibilă la Allaqi din cauza condiţiilor de mediu legate de: 1) variaţii ale calităţii apei şi hidrosolurilor datorate în principal activităţilor antropice; 2) variaţii ale caracteristicilor naturale şi fizice ale malurilor; 3) deteriorarea mecanică datorată păsărilor migratoare şi 4) competiţia cu speciile epifite şi alte specii macrofite pentru lumină, nutrienţi, oxigen şi spaţiu. Tehnica statistică CAA a fost deosebit de utilă în înţelegerea răspunsurilor diferitelor specii de Najas prezente la Allaqi (Najas horrida, Najas marina subsp. armata şi Najas minor) la diferite condiţii de
Load more

Recommended publications
  • Annex REPORT for 2019 UNDER the “HEALTH CARE” PRIORITY of the NATIONAL ROMA INTEGRATION STRATEGY of the REPUBLIC of BULGAR
    Annex REPORT FOR 2019 UNDER THE “HEALTH CARE” PRIORITY of the NATIONAL ROMA INTEGRATION STRATEGY OF THE REPUBLIC OF BULGARIA 2012 - 2020 Operational objective: A national monitoring progress report has been prepared for implementation of Measure 1.1.2. “Performing obstetric and gynaecological examinations with mobile offices in settlements with compact Roma population”. During the period 01.07—20.11.2019, a total of 2,261 prophylactic medical examinations were carried out with the four mobile gynaecological offices to uninsured persons of Roma origin and to persons with difficult access to medical facilities, as 951 women were diagnosed with diseases. The implementation of the activity for each Regional Health Inspectorate is in accordance with an order of the Minister of Health to carry out not less than 500 examinations with each mobile gynaecological office. Financial resources of BGN 12,500 were allocated for each mobile unit, totalling BGN 50,000 for the four units. During the reporting period, the mobile gynecological offices were divided into four areas: Varna (the city of Varna, the village of Kamenar, the town of Ignatievo, the village of Staro Oryahovo, the village of Sindel, the village of Dubravino, the town of Provadia, the town of Devnya, the town of Suvorovo, the village of Chernevo, the town of Valchi Dol); Silistra (Tutrakan Municipality– the town of Tutrakan, the village of Tsar Samuel, the village of Nova Cherna, the village of Staro Selo, the village of Belitsa, the village of Preslavtsi, the village of Tarnovtsi,
    [Show full text]
  • Trophic Facilitation by the Oystercatcher Haematopus Palliatus Temminick on the Scavenger Snail Buccinanops Globulosum Kiener in a Patagonian Bay
    Journal of Experimental Marine Biology and Ecology 325 (2005) 27–34 www.elsevier.com/locate/jembe Trophic facilitation by the oystercatcher Haematopus palliatus Temminick on the scavenger snail Buccinanops globulosum Kiener in a Patagonian bay Pedro Daleoa,b,*, Mauricio Escapab,c, Juan Pablo Isaccha,b, Pablo Ribeiroa,b, Oscar Iribarnea,b aDepartamento de Biologı´a (FCEyN), Universidad Nacional de Mar del Plata, Funes 3250, CC 573 Correo Central, B7600WAG, Mar del Plata, Argentina bConsejo Nacional de Investigaciones Cientı´ficas y Te´cnicas (CONICET), Argentina cInstituto Argentino de Oceanografı´a (IADO), Argentina Received 25 August 2004; received in revised form 4 April 2005; accepted 7 April 2005 Abstract This study investigated the role of the American oystercatcher (Haematopus palliatus) as a resource subsidizer for the scavenger snail Buccinanops globulosum in a northern Patagonian bay (40845VS, 64856VW, San Antonio Bay, Argentina). The most frequent food item for the snails was dead crabs Cyrtograpsus angulatus Dana, and the snails preferred this item. In the field, most dead crabs (78%) resulted from oystercatcher predation. Field densities of dead crabs were within the 95% confidence limits of the estimated densities produced by oystercatcher foraging activity, suggesting that a large proportion of carrion available for snails is a byproduct of oystercatcher predation. Dead crabs with injuries were more rapidly detected and consumed by snails, probably because injuries produced by oystercatchers increase leakage of body fluids and facilitate penetration of the proboscis of the snails. Our results suggest that oystercatcher predation subsidize this scavenger snail by increasing availability of food, decreasing variability in their provision and facilitating their consumption.
    [Show full text]
  • Appendices (Pdf, 11926KB)
    Richmond Education and Enterprise Campus Development EIA Scoping Report Final APPENDICES WORKING DRAFT Cascade Consulting [This page is intentionally blank for double-sided printing] Richmond Education and Enterprise Campus Development EIA Scoping Report Final APPENDIX 1.1 DRAWINGS OF PROPOSED DEVELOPMENT Proposed Site Plan Site Aerial Indicative Site Division WORKING DRAFT Cascade Consulting [This page is intentionally blank for double-sided printing] ¹ ¹ µ µ ý 5 U ° ° « 4 ¨ h ¡ I 3 « ¥ 2 x o ' « § p ¸ ¸ K 1 ) ) C é ë ì ë î ë æ ë æ ë ë n è ! t ¤ § # + ç æ ç © è è è & $ µ 0 ( q à ' ) é ê é ê ì ê ì ê ñ ê î ê ¯ ¯ ! + m ! ² ü ç ç ç ç ç ç + : s 0 Õ ! ) ¶ © ª é ê é ê é ê é ê é ê é ê ¨ ü u  ! » » $ n è è è è è è # ± : / k ç ç ç ç ç ç { h ! + æ æ ) æ æ æ æ ý E µ ~ Î ? ) z f . , ³ Å Å / , ² ² # ' ? u 4 ' ! ( ! ´ ( . ' { 3 Ñ ' F & 0 p + - 2 } ± ± % ² ©ü ) ( ´ ( % $ { / h / # p ' Ð - , ! ' / S ( z ' ü ü . § ÿ ± ' ± Í ) ÁH & ) Ç Ç < | ! S - ( : ! A ) # ¦ & } · ( " % & W ü V b > ) : r + WÉ ® ( q Æ Æ # ´ O ! + ) # K S _ ] 7 | Ï ± / $ ) X ' « # < " u ¼ + S \ G $ & S Ú « A { # È z U + : J ) ³ + ( ³ Å ³ Å # X ü Î p © % » Ù À ( × ? ' " # NH K ' ¯ + X W W $ / z & ' ; Ú × Ø û / E â $ / â â â â â ! / + y M : ! ² Í ² ² X X / µ - A ­ ) ' « « F ) ß ß ß ß ß ß UÉ ! $ ! ¿ + ) ´ ¶ ú F # W Ý L W # ^ ! G á á á á á á Ø ) ( a ( å å w x å å å å & ( J < ' ( Ú × ± # ± ± / ! ¶ Ì K + V V / ä ) ä v ä ä ä ä F ) 8 Ø K ­ 7 ) " ] + ) D ¨ ( ù ' + © ã 4 ã ã ã ã ã Æ º § ! u 8 F ! .
    [Show full text]
  • (Approx) Mixed Micro Shells (22G Bags) Philippines € 10,00 £8,64 $11,69 Each 22G Bag Provides Hours of Fun; Some Interesting Foraminifera Also Included
    Special Price £ US$ Family Genus, species Country Quality Size Remarks w/o Photo Date added Category characteristic (€) (approx) (approx) Mixed micro shells (22g bags) Philippines € 10,00 £8,64 $11,69 Each 22g bag provides hours of fun; some interesting Foraminifera also included. 17/06/21 Mixed micro shells Ischnochitonidae Callistochiton pulchrior Panama F+++ 89mm € 1,80 £1,55 $2,10 21/12/16 Polyplacophora Ischnochitonidae Chaetopleura lurida Panama F+++ 2022mm € 3,00 £2,59 $3,51 Hairy girdles, beautifully preserved. Web 24/12/16 Polyplacophora Ischnochitonidae Ischnochiton textilis South Africa F+++ 30mm+ € 4,00 £3,45 $4,68 30/04/21 Polyplacophora Ischnochitonidae Ischnochiton textilis South Africa F+++ 27.9mm € 2,80 £2,42 $3,27 30/04/21 Polyplacophora Ischnochitonidae Stenoplax limaciformis Panama F+++ 16mm+ € 6,50 £5,61 $7,60 Uncommon. 24/12/16 Polyplacophora Chitonidae Acanthopleura gemmata Philippines F+++ 25mm+ € 2,50 £2,16 $2,92 Hairy margins, beautifully preserved. 04/08/17 Polyplacophora Chitonidae Acanthopleura gemmata Australia F+++ 25mm+ € 2,60 £2,25 $3,04 02/06/18 Polyplacophora Chitonidae Acanthopleura granulata Panama F+++ 41mm+ € 4,00 £3,45 $4,68 West Indian 'fuzzy' chiton. Web 24/12/16 Polyplacophora Chitonidae Acanthopleura granulata Panama F+++ 32mm+ € 3,00 £2,59 $3,51 West Indian 'fuzzy' chiton. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F+++ 44mm+ € 5,00 £4,32 $5,85 Caribbean. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F++ 35mm € 2,50 £2,16 $2,92 Caribbean. 24/12/16 Polyplacophora Chitonidae Chiton tuberculatus Panama F+++ 29mm+ € 3,00 £2,59 $3,51 Caribbean.
    [Show full text]
  • Draft Carpathian Red List of Forest Habitats
    CARPATHIAN RED LIST OF FOREST HABITATS AND SPECIES CARPATHIAN LIST OF INVASIVE ALIEN SPECIES (DRAFT) PUBLISHED BY THE STATE NATURE CONSERVANCY OF THE SLOVAK REPUBLIC 2014 zzbornik_cervenebornik_cervene zzoznamy.inddoznamy.indd 1 227.8.20147.8.2014 222:36:052:36:05 © Štátna ochrana prírody Slovenskej republiky, 2014 Editor: Ján Kadlečík Available from: Štátna ochrana prírody SR Tajovského 28B 974 01 Banská Bystrica Slovakia ISBN 978-80-89310-81-4 Program švajčiarsko-slovenskej spolupráce Swiss-Slovak Cooperation Programme Slovenská republika This publication was elaborated within BioREGIO Carpathians project supported by South East Europe Programme and was fi nanced by a Swiss-Slovak project supported by the Swiss Contribution to the enlarged European Union and Carpathian Wetlands Initiative. zzbornik_cervenebornik_cervene zzoznamy.inddoznamy.indd 2 115.9.20145.9.2014 223:10:123:10:12 Table of contents Draft Red Lists of Threatened Carpathian Habitats and Species and Carpathian List of Invasive Alien Species . 5 Draft Carpathian Red List of Forest Habitats . 20 Red List of Vascular Plants of the Carpathians . 44 Draft Carpathian Red List of Molluscs (Mollusca) . 106 Red List of Spiders (Araneae) of the Carpathian Mts. 118 Draft Red List of Dragonfl ies (Odonata) of the Carpathians . 172 Red List of Grasshoppers, Bush-crickets and Crickets (Orthoptera) of the Carpathian Mountains . 186 Draft Red List of Butterfl ies (Lepidoptera: Papilionoidea) of the Carpathian Mts. 200 Draft Carpathian Red List of Fish and Lamprey Species . 203 Draft Carpathian Red List of Threatened Amphibians (Lissamphibia) . 209 Draft Carpathian Red List of Threatened Reptiles (Reptilia) . 214 Draft Carpathian Red List of Birds (Aves). 217 Draft Carpathian Red List of Threatened Mammals (Mammalia) .
    [Show full text]
  • Substrat Dasar Dan Parameter Oseanografi Sebagai Substrat
    ILMU KELAUTAN , Maret 2009 Vol. 14(1):50 -59 ISSN 9853 -7291 Substrat Dasar dan Parameter Oseanografi Sebagai Penentu Keberadaan Gastropoda dan Bivalvia di Pantai Sluke Kabupaten Rembang Ita Riniatsih*, Edi Wibowo Kushartono Jurusan Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro Kampus Tembalang Semarang HP 081325560293 Abstrak Gastropoda dan bivalvia memiliki distribusi yang luas dalam ruang dan waktu, kebanyakan melimpah sebagai individu. Gastropoda dan bivalvia umumnya berada di laut, hidup di sepanjang pantai atau diperairan dangkal. Penelitian ini bertujuan untuk mengetahui pengaruh tekstur substrat dasar dan kandungan bahan organik sebagai penentu keberadaan gastropoda dan bivalvia di Pantai Sluke, Kabupaten Rembang di bagi menjadi 5 lokasi dengan jarak masing-masing lokasi 100 m sepanjang garis pantai. Tiap lokasi dibagi menjadi 5 stasiun dengan jarak masing-masing stasiun 100 m ke arah laut. Pengambilan sampel dilakukan dalam transek kuadran 1x1m, selanjutnya sampel dibersihkan dan diawetkan untuk kemudian dilakukan identifikasi. Hasil penelitian menunjukkan bahwa gastropoda dan bivalvia paling banyak ditemukan pada stasiun B pada jarak 200 m dari pantai, sedangkan pada stasiun A3,A5,C3,D3, dan E2 tidak ditemukan adanya gastropoda dan bivalvia. Spesies yang paling banyak ditemukan adalah Nassarius siquijorensis dari kelas gastropoda dengan jumlah 62 spesies. Untuk Trachycardium rugosum dari kelas bivalvia adalah spesies yang paling sedikit ditemukan. Kandungan bahan organik pada pantai Sluke memiliki perbedaan yang sangat mencolok. Kandungan bahan organik tertinggi yaitu 22,38 % tergolong dalam kandungan bahan organik tinggi yang terdapat pada stasiun C5, sedangkan kandungan bahan organik terendah yaitu 2,65 % tergolong dalam kandungan bahan organik sangat rendah yang terdapat pada stasiun E1. Untuk tekstur substrat dasar rata-rata dari stasiun 1 pada semua lokasi mempunyai substrat dasar pasir.
    [Show full text]
  • DNA Barcoding Reveal Patterns of Species Diversity Among
    www.nature.com/scientificreports OPEN DNA barcoding reveal patterns of species diversity among northwestern Pacific molluscs Received: 04 April 2016 Shao’e Sun, Qi Li, Lingfeng Kong, Hong Yu, Xiaodong Zheng, Ruihai Yu, Lina Dai, Yan Sun, Accepted: 25 August 2016 Jun Chen, Jun Liu, Lehai Ni, Yanwei Feng, Zhenzhen Yu, Shanmei Zou & Jiping Lin Published: 19 September 2016 This study represents the first comprehensive molecular assessment of northwestern Pacific molluscs. In total, 2801 DNA barcodes belonging to 569 species from China, Japan and Korea were analyzed. An overlap between intra- and interspecific genetic distances was present in 71 species. We tested the efficacy of this library by simulating a sequence-based specimen identification scenario using Best Match (BM), Best Close Match (BCM) and All Species Barcode (ASB) criteria with three threshold values. BM approach returned 89.15% true identifications (95.27% when excluding singletons). The highest success rate of congruent identifications was obtained with BCM at 0.053 threshold. The analysis of our barcode library together with public data resulted in 582 Barcode Index Numbers (BINs), 72.2% of which was found to be concordantly with morphology-based identifications. The discrepancies were divided in two groups: sequences from different species clustered in a single BIN and conspecific sequences divided in one more BINs. In Neighbour-Joining phenogram, 2,320 (83.0%) queries fromed 355 (62.4%) species-specific barcode clusters allowing their successful identification. 33 species showed paraphyletic and haplotype sharing. 62 cases are represented by deeply diverged lineages. This study suggest an increased species diversity in this region, highlighting taxonomic revision and conservation strategy for the cryptic complexes.
    [Show full text]
  • Molluscan Diversity in Tidal Marshes Along the Scheldt Estuary (The Netherlands, Belgium)
    Hydrobiologia 474: 189–196, 2002. 189 © 2002 Kluwer Academic Publishers. Printed in the Netherlands. Molluscan diversity in tidal marshes along the Scheldt estuary (The Netherlands, Belgium) L. Bruyndoncx1,K.Jordaens2, T. Ysebaert3,4,P.Meire5 & T. Backeljau1,2,∗ 1Royal Belgian Institute of Natural Sciences, Vautierstraat 29, B-1000 Brussels, Belgium Tel: 32 2 627 43 39. Fax: 32 2 627 41 41. E-mail: [email protected] 2 Evolutionary Biology Group, University of Antwerp (R.U.C.A.), Groenenborgerlaan 171, B-2020 Antwerp, Belgium 3Institute of Nature Conservation, Kliniekstraat 25, B-1070 Brussels, Belgium 4Netherlands Institute of Ecology, Centre for Estuarine and Coastal Ecology, NIOO-CEMO, P.O. Box 140, 4400 AC Yerseke, The Netherlands 5Ecosystem Management Research Group, University of Antwerp (U.I.A.), Universiteitsplein 1, B-2610 Wilrijk, Belgium (∗Author for correspondence) Received 29 May 2001; in revised form 10 January 2002; accepted 6 February 2002 Key words: Mollusca, Scheldt estuary, species diversity, salinity gradient, Pseudotrichia rubiginosa Abstract The mollusc fauna of 64 sites in 31 tidal marshes was surveyed along a salinity gradient from freshwater to marine conditions in the river Scheldt (Belgium–The Netherlands). A total of 10 649 specimens involving 31 taxa were identified. Salinity turned out to be a major factor in mollusc assemblages in the Scheldt estuary, but other factors can not be excluded. In the marine part five species were common, compared to the brackish part where only Assiminea grayana was abundant. In the freshwater zone species richness was highest (24). There was a significant correlation between flooding frequency and species richness in the tidal freshwater marsh ‘Durmemonding’.
    [Show full text]
  • The New Red List of the Molluscs of Latvia
    Environmental and Experimental Biology (2018) 16: 55–59 Original Paper https://doi.org/10.22364/eeb.16.08 The New Red List of the molluscs of Latvia Mudīte Rudzīte1*, Elmīra Boikova2, Edgars Dreijers3, Iveta Jakubāne4, Elga Parele2, Digna Pilāte5, Māris Rudzītis6 1Museum of Zoology, University of Latvia, Kronvalda bulv. 4, Rīga LV–1586, Latvia 2Institute of Biology, University of Latvia, Miera 3, Salaspils LV–2169, Latvia 3Latvian Museum of Natural History, Krišjāņa Barona 4, Rīga LV–1050, Latvia 4Daugavpils University, Institute of Life Science and Tehnology, Parādes 1A, Daugavpils LV–5401, Latvia 5Latvian State Forest Research Institute “Silava”, Rīgas 111, Salaspils LV–2169, Latvia 6Museum of Geology, University of Latvia, Alberta 10, Rīga LV–1010, Latvia *Corresponding author, E-mail: [email protected] Abstract A new list of protected molluscs in Latvia – the New Red List – has been prepared. It includes 39 species from 170 species found in Latvia. The category 0 has no species, there is 1 species in the first category, 6 species in the second category, 25 species in the third category, and 7 species in the fourth category. Evaluation criteria similar to these in the previously published Red Books have been used. Information on 64 species included in the IUCN LC category is also collected. There is no need for special protection measures for these species; however, the dynamics of their populations should be monitored. Key words: Latvia, mollusc species, protection status. Introduction Red List categories The first Red Data Book of Latvia was published 33 years The definitions of the following categories are based on ago (Aigare et al.
    [Show full text]
  • Report on the Activity Independent Auditor's Report Financial Statements
    REPORTГОДИШЕН ON THE ДОКЛАД ACTIVITY INDEPENDENTДОКЛАД AUDITOR’S НА НЕЗАВИСИМИЯREPORT ОДИТОР FINANCIALФИНАНСОВ STATEMENTS ОТЧЕТ бул. „Шипчен 1574 скSofia,и прох Bulgariaод“, № 67 Б 67 1B574 Shipchenski София, Бългаprohodри яBlvd телTel.:.: +359 2 973 36 37; 973 38 16 факFax:с: +359 +359 2 2 973 973 3 388 1818 E-mailil: [email protected] www.ecofund-bg.org www.myclimate.bg 31 декемвриDecember 20172017 г. Since the beginning of its activities until the completion of the swap deal “Debt-for-Environment” NTEF has financed 100 investment projects, providing more than BGN 26 500 000. Therefore, the Fund has played the role of a decisive factor for mobilizing additional BGN 115 100 000 from other, mainly international sources, for the implementation of environmental “The NTEF is a well-managed and highly effective public institution, protection projects in Bulgaria. environmental financing institution with few weaknesses and many strengths, making it uniquely valuable institution in bulgaria. In the end of 2011, as a result of the joint efforts of the governments With clear and tangible government support the fund has the potential of the Republic of Bulgaria and the Republic of Austria, two deals for sale to perform a much greater role in mobilizing and managing the financial of Assigned Amounts Units (AAU) with the Republic of Austria pursuant resources needed to meet the environmental challenges of eu accession.” to art. 17 of the Kyoto Protocol were finalized. As of the end of 2015, 45 public projects were implemented under both deals, amounting From “Review and Assessment of the National Trust EcoFund”, submitted by to a total of BGN 32 937 914.
    [Show full text]
  • Terrestrial Molluscs of the Tsyr-Pripyat Area in Volyn (Northern Ukraine): the First Findings of the Threatened Snail Vertigo Moulinsiana in Mainland Ukraine
    Vestnik zoologii, 51(3): 251–258, 2017 DOI 10.1515/vzoo-2017-0031 UDC 594.38(477.82) TERRESTRIAL MOLLUSCS OF THE TSYR-PRIPYAT AREA IN VOLYN (NORTHERN UKRAINE): THE FIRST FINDINGS OF THE THREATENED SNAIL VERTIGO MOULINSIANA IN MAINLAND UKRAINE I. Balashov1, M. Yarotskaya2, J. Filatova3, I. Starichenko3, V. Kovalov3 1Schmalhausen Institute of Zoology, NAS of Ukraine, vul. B. Khmelnytskogo, 15, Kyiv, 01030 Ukraine E-mail: [email protected] 2NatureCenter “Pathfi nders”, Kharkiv, 61091, PO Box 7384, Ukraine E-mail: [email protected] 3V. N. Karazin Kharkiv National University, Svobody Sq., 4, Kharkiv, 61022 Ukraine Terrestrial Molluscs of the Tsyr-Pripyat Area in Volyn (Northern Ukraine): the First Findings of the Th reatened Snail Vertigo moulinsiana in Mainland Ukraine. Balashov, I., Yarotskaya, M., Filatova, J., Starichenko, I., Kovalov, V. — 26 species of terrestrial molluscs were found in the studied area, including the rare and globally threatened Vertigo moulinsiana that is listed in “Habitats Directive” of the EU and in numerous red lists. Until now it was known in Ukraine only by one population in the Crimea that became extinct in 2014. Its conservation status, taking threats into account, is considered to be “Critically Endangered” on the national level in Ukraine. Th e characteristics of the phytocenoses to which it is restricted and the associated molluscan faunas are discussed. Key words: Mollusca, Gastropoda, Stylommatophora, fens, conservation. Introduction Several species of terrestrial molluscs that inhabit European fens are considered to be of high conserva- tion priority. First of all, it refers to the 4 species of the genus Vertigo listed in Annex II of European Unionʹs “Habitats Directive” and numerous red lists: V.moulinsiana (Dupuy, 1849), V.
    [Show full text]
  • Molluscan Associations with the Clausiliid Alinda
    Folia Malacol. 22(1): 49–60 http://dx.doi.org/10.12657/folmal.022.005 MOLLUSCAN ASSOCIATIONS WITH THE CLAUSILIID ALINDA BIPLICATA (MONTAGU, 1803) (GASTROPODA: PULMONATA: CLAUSILIIDAE) IN FLOODPLAIN FORESTS AT THE NORTH-EASTERN EDGE OF ITS RANGE ANNA SULIKOWSKA-DROZD1*, HEIKE KAPPES2,3 1Department of Invertebrate Zoology and Hydrobiology, University of Łódź, Banacha Str. 12/16, 90-237 Łódź, Poland (e-mail: [email protected]) 2Naturalis Biodiversity Center, Postbus 9517, 2300 RA Leiden, The Netherlands 3Department of Ecology, Cologne Biocenter, University of Cologne, Zülpicher Str. 47b, 50674 Cologne, Germany *corresponding author ABSTRACT: We quantified the mollusc assemblage composition in eight riverine forests inhabited by the door snail Alinda biplicata (Montagu) in Central Poland where it occurs at the north-eastern border of its distribution range. In each location, eight random 0.25 m2 plots were quantitatively sampled from a 400 m² core area that was searched for additional species. A total of 54 species were found, composed of 46 terrestrial snails and slugs, six freshwater gastropod and two clam species. Abundances ranged from 220 to 4,400 ind.m–2 per location, with a maximum of 2,200 individuals per plot. The number of taxa ranged from 17 to 34 per location and from 3 to 23 per plot. A. biplicata occurred in each randomly sampled plot. The highest number of co-occurrences with Alinda was found for Carychium tridentatum and Nesovitrea hammonis. Additionally, forest-specific, wetland-specific and even dry habitat-specific snails can use the same patch of microhabitat. The lack of narrow ecological specialisation in A.
    [Show full text]