https://www.um.edu.mt/library/oar/handle/123456789/34358 2026-04-24T00:26:20Z 2026-04-24T00:26:20Z Hili, Carmel Axiak, Victor Schembri, Patrick J. https://www.um.edu.mt/library/oar/handle/123456789/37623 2025-12-10T08:43:32Z 1990-01-01T00:00:00Z

Title: The Għadira Reserve : physico-chemical characteristics of the pool Authors: Hili, Carmel; Axiak, Victor; Schembri, Patrick J. Abstract: The Għadira Reserve is the largest saline marshland in the Maltese Islands. It is a protected bird sanctuary and a review of its development may be found in Sultana (1990) and a more detailed description of the area is given in Borg et al. (1990) This paper will present data on the physico-chemical parameters in the waters of this marsh as recorded from four fixed stations over a period of one year (May 1985 - April 1986). The purpose of this investigation was to provide information to the ecological study of the Ghadira pool (Borg et al., 1989) and thus to contribute towards the basic environmental information which is essential for the correct management of such reserved areas. The present Ghadira marsh complex consists of a central pool with a number of small artificial 'islands' (Figure 1). The pool is surrounded by a embankment and a ditch to limit public access to the area. Furthermore, the ditch was designed to collect rainwater and drain it into a freshwater reservoir constructed on the west side of the pool at the farthest side from the sea. This reservoir was to supply the central pool with enough water throughout the year and thereby to prevent its drying up during the summer months (Axell, 1980). The Ghadira marsh complex is separated from the sea (Mellieha Bay) by a road and a narrow sandy beach which together are approximately 100m wide.

1990-01-01T00:00:00Z Borg, Mark J. Schembri, Patrick J. Axiak, Victor https://www.um.edu.mt/library/oar/handle/123456789/37622 2025-12-10T08:42:24Z 1990-01-01T00:00:00Z

Title: Ecology of the Ghadira pool macrofauna (Għadira Nature Reserve, Maltese Islands, Central Mediterranean) Authors: Borg, Mark J.; Schembri, Patrick J.; Axiak, Victor Abstract: Sediment and water samples were collected quantitatively from three stations in the pool within the Ghadira Nature Reserve at monthly intervals over a period of 12 months (May 1985-April 1986). The macrofauna within these samples was sorted into species and counted to provide estimates of population density and abundance, and of their fluctuation with season. Five species dominated the samples: Ventrosia ventrosa (Gastropoda), Cerastodennaglaucum (Bivalvia),Orchestiagammarellus(Amphipoda),Lekanesphaerahookerimediterranea (Isopoda) and the larvae of an unidentified species of Chironomidae (Diptera). Other species present in lower numbers included: Truncatellasubcylindrica(Gastropoda),Ovatellamyosotis(Gastropoda), Gammarus aequicauda (Amphipoda), larvae of Sratiomys longicomis and an unidentified species of Syrphidae (Diptera), four different species of Hydrophilidae (Coleoptera), and the fish Liza ramada and Aphanius fasciatus.

1990-01-01T00:00:00Z Marchioni Ortu, A. De Martis, B. https://www.um.edu.mt/library/oar/handle/123456789/37621 2018-12-21T02:46:09Z 1989-01-01T00:00:00Z

Title: On the biology of some rice-field weeds in Sardinia : Cotula and Heteranthera Authors: Marchioni Ortu, A.; De Martis, B. Abstract: The biology and ecology of Cotula coronopifolia L. (Compositae), Heteranthera rotundifolia (Kunth) Griseb. and Heteranthera reniformis Ruiz & Pavon (Ponte- deriaceae), three new weeds naturalized in rice-fields of central-southern Sardinia, are described. Attention is focussed on the degree of propagation of these "taxa", as a consequence of their suitability for the environmental conditions of Sardinian rice- fields, where it seems that marked convergences exist with regard to the original habitat of these species.

1989-01-01T00:00:00Z https://www.um.edu.mt/library/oar/handle/123456789/37620 2018-12-21T02:46:41Z 1990-01-01T00:00:00Z

Title: CENTRO : volume 1 : issue 5 Editors: Axiak, Victor Abstract: Table of contents: 1/ SULTANA, J. - An introduction to the Ghadira Nature Reserve -- 2/ HILI, C., AXIAK, V., SCHEMBRI, P. J. - The Ghadira Reserve: physico-chemical characteristics of the pool -- 3/ BORG, M. J., SCHEMBRI, P. J., AXIAK, V. - Ecology of the Ghadira pool macrofauna (Ghadira Nature Reserve, Maltese Island, Central Mediterranean) -- 4/ GAUCI, C. - The avifauna of the Ghadira Nature Reserve -- 5/ LANFRANCO, E. - The vegetation of the Ghadira Nature Reserve

1990-01-01T00:00:00Z