Κατανομή και ταξινόμηση της μικροπανίδας στα παράκτια οικοσυστήματα της ν.Λήμνου = Distribution and systematics of the microfauna at the coastal ecosystems of Lemnos Island.

Σοφία Ευστάθιος Αψεμίδου

Κατανομή και ταξινόμηση της μικροπανίδας στα παράκτια οικοσυστήματα της ν.Λήμνου = Distribution and systematics of the microfauna at the coastal ecosystems of Lemnos Island.

Σοφία Ευστάθιος Αψεμίδου

Περίληψη

Για την εκτίμηση των σύγχρονων περιβαλλοντικών συνθηκών στον παράκτιο χώρο της Λήμνου πραγματοποιήθηκε δειγματοληψία ιζημάτων πυθμένα για τη μελέτη τρηματοφόρων σε 6 διαφορετικές θέσεις (Κέρος, Πλατύ, Χαβούλη, Εβγάτης, Ηφαιστεία, Μικρό Φαναράκι). Οι μέθοδοι που εφαρμόστηκαν περιελάμβαναν την πανιδική ανάλυση και την στατιστική επεξεργασία των δεδομένων με υπολογισμό πανιδικών δεικτών [Taxa (S), Dominance (D), Shannon (H’), Equitability (J), Πυκνότητα (Density)]. Από τις θέσεις μελέτης συλλέχθηκαν συνολικά 843 άτομα που ανήκαν σε 17 γένη και 26 είδη τρηματοφόρων, καθώς και 137 σπασμένα/επανεπεξεργασμένα κελύφη. Διακρίθηκαν 5 πανιδικές συναθροίσεις: Α. Συνάθροιση τυπικού παράκτιου θαλάσσιου περιβάλλοντος (θέσεις Κέρος, Πλατύ), με τυπικά είδη τα A. beccarii, μικρά rotaliids, Elphidium spp., Peneroplis spp., miliolids και υψηλές τιμές πανιδικών δεικτών, Β. Συνάθροιση παράκτιου θαλάσσιου περιβάλλοντος με έντονη φυτοκάλυψη (θέση Χαβούλη) με τυπικά είδη τα P. pertusus, A. beccarii, miliolids, Elphidium spp., μικρά rotaliids και μέτριες τιμές πανιδικών δεικτών. Γ. Συνάθροιση παράκτιου θαλάσσιου περιβάλλοντος με εισροές γλυκών υδάτων (θέση Εβγάτης), με τυπικά είδη τα E. crispum, A. beccarii, miliolids και μέτριες-χαμηλές τιμές πανιδικών δεικτών. Δ. Συνάθροιση ανοιχτής λιμνοθάλασσας (θέση Ηφαιστεία) με τυπικά είδη τα Quinqueloculina sp1, A. tepida, E. crispum, P. planatus και χαμηλές τιμές πανιδικών δεικτών. Ε. Συνάθροιση παράκτιου θαλάσσιου περιβάλλοντος με έντονο κυματισμό (θέση Μικρό Φαναράκι) και τυπικά είδη τα A. beccarii, Elphidium spp., Peneroplis spp., miliolids, μικρά rotaliids και μέτριες-υψηλές τιμές των πανιδικών δεικτών. Η εργασία αυτή αποδεικνύει την χρησιμότητα των τρηματοφόρων ως περιβαλλοντικοί δείκτες και προσθέτει νέα στοιχεία για το ΒΑ Αιγαίο.
Λέξεις κλειδιά: Τρηματοφόρα, περιβαλλοντικοί δείκτες, παράκτια οικοσυστήματα, Λήμνος

For the assessment of the current environmental conditions in the coastal area of Lemnos, foraminiferal sampling was carried out in 6 different locations (Keros, Plati, Chavouli, Evgatis, Hephaestia, Mikro Fanaraki). The methods applied included a fauna analysis and the statistical processing of the data, with calculation of faunal indices [Taxa (S), Dominance (D), Shannon (H’), Equitability (J), Density]. A total of 843 individuals belonging to 17 genera and 26 species of foraminifera were collected from the study areas, as well as 137 broken/reworked specimens. Five faunal assemblages were distinguished: A. Assemblage of typical shallow marine environment (Keros, Plati sites), with typical species A. beccarii, small rotaliids, Elphidium spp., Peneroplis spp., miliolids and high values of faunal indices, B. Assemblage of shallow marine environment with seagrass (Chavouli site) with typical species P. pertusus, A. beccarii, miliolids, Elphidium spp., small rotaliids and moderate values of faunal indices. C. Assemblage of shallow marine environment with freshwater inputs (Evgatis site), with typical species E. crispum, A. beccarii, miliolids and moderate-low values of faunal indices. D. Assemblage of open lagoon (Hephaestia site) with typical species Quinqueloculina sp. 1, A. tepida, E. crispum, P. planatus and low values of faunal indices. E. Assemblage of shallow marine environment with strong waves (Mikro Fanaraki site) with typical species A. beccarii, Elphidium spp., Peneroplis spp., miliolids, small rotaliids and moderate-high values of faunal indices. This work proves the usefulness of foraminifera as environmental bioindicators and provides new data for the NE Aegean.
Keywords: Foraminifera, environmental indices, coastal ecosystems, Lemnos

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Αναφορές

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Ιστοσελίδες

http://www.marinespecies.org | WoRMS – World Register of Marine Species

http://www.researchgate.net | Αναζήτηση Εργασιών

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