310
M. Leonardi and S. Giacobbe
sent the effect of the human interventions on the
updrift areas?
Some of the data we present here leads us to
think that the six pools, during the time of their
short existence, are actually evolving in the natural direction of these environments, that is,
towards a progressive confinement, hypothesis
actually confirmed by the progressive muddying
of bottom sediments. However the organic load
does not grow proportionally, but it seems to
diminish, albeit with wide fluctuations.
The benthic communities, besides, are also
undergoing these modifications, and they tend to
organize themselves more and more in lagoontype communities. as is evident, among other
things by the growing diffusion of specific saltmarsh species (Abra segmentatum or Cerastoderma glaucum), in comparison with those which
are simply eurytopic (Paphia aurea or Nassarius
costulatus). Such a process of organization is also
highlighted by the increase of specific richness as
well as by the lower homogeneity of the trophic
structure of the communities, which tend to
become less numerous and more articulated.
At the current phase of the study we still have
not clarified whether this quantitative decrease
in the benthic communities is structural or occasional. It is however true that the density of the
populations and the TOC content of the sediments have a parallel evolution.
Without drawing too premature a conclusion, it would seem reasonable to presume that
both phenomena are manifestations of the same
evolutionary process, which push the ecosystem
towards a continuous reorganization through
biological differentiation.
Also the interference of the anthropic compartment, although it has determined fluctuations in the evolutionary trend of the system, has
not substantially modified the pathway, being
that of a progressive confinement.
References
Abbruzzese D, Aricb F (1955) Osservazioni geomorfologiche e
fisico-chimiche sui laghi di Oliveri-Tindad. Roll Pesca Piscic
Idrobioll0: 1 23
Amore C, Randazzo G (2000) Geographical and geomorphological Evolution of the Marinello-Tindari area (North Sicily). J
Coast Conserv (in press)
Azzaro F (1995) Osservazioni biennali sull'ecosistema degli stagni costieri di Oliveri-Tindari (Messina): Nutrienti e dorofilIa u. Atti Soc Ital Ecol 16: 495-497
Bramhati A (1988) Lagune e stagni costied: due ambienti a confronto. In: Carrada GC, Cicogna F, Fresi E (eds) Le Iagune
costiere: ricerca e gestione. CLEM, Massa Lubrense (Napoli),
pp 9-33
Buchanan JB, Kain JM (1971) Measurement of the physical and
chemical environment. In: Holme NA, McIntyre AD (eds)
Methods for the study of marine benthos.IPB Handbook 16:
41-65
CNR-Istituto Sperimentale Talassografico, Messina (1990)
Indagine interdisciplinare sui sistema degli stagni salmastri
costieri di Oliveri-Tindari (Messina). Rapp 4: 1-34
Crisafi E, Giacobbe S, Leonardi M (1981) Nuove ricerche idrobiologiche nell'area lagunare di Oliveri-Tindari (Messina). l.
Morfologia dei bacini e caratteristiche fisico-chimiche delle
acque e dei sedimenti. Mem BioI Mar Oceanogr II: 139-186
Crisafi P (1961) Primo contributo alIa conoscenza dei Copepodi
degli stagni litorali di Oliveri (Messina). Rapp P V Reun
CIESM 16: 841-843
Dunbar RB, Leventer AR, Stockton WL (1989) Biogenic sedimentation in McMurdo Sound, Antarctica. Mar Geo185: 155-179
Fanucd F. Fierro G, Grosso F. Piacentino GB (1973) Contributo di
una indagine sedimentologica e ricerche ecologiche nel Golfo
di La Spezia.lst Idrigr Mar 1050: 1-17
Faranda F, Gangemi G, Guglielmo L (1975) Nuove condizioni dell'arenile eli Oliveri e dei laghetti salmastri Mergolo della
Tonnara e verde (Prime osservazioni). Atti Soc Peloritana
21: 15-31
Genovese S (1964) Sali nutritivi ed attivita microbica in alcuni
ambienti salmastri. Boll Zoo! 31 (II): 409-421
Giacobbe MG, Maimone G, Azzaro F (1992) Distribuzione del
fitoplancton in un'area salmastra della Sicilia nord-orientale. G Bot Ital126: 531-547
Giacobbe S, Giordano R (1975) Prime osaervazioni sugli insediamenti bentonici della zona Iagunare di Oliveri-Tindari
(Messina).Atti Soc Peloritana 21: 169-182
Giacobbe S, Leonardi M (1986) rarea lagunare di Oliveri-Tindari:
Sue variazioni morfologiche recenti ed evoluzione dei popolamenti a molluschi In: Atti VII Congr AIOL: 355-366
Giacobbe S, Leonardi M, Azzaro F, Rinelli P (1990) Descrizione eli
un. esempio di "confinamento": l'area lagunare di OliveriTindari (Messina). Oebalia XVI-2: 675-678
Guelorget 0, Perthuisot IP (1983) Le domaine paralique: expressions geologiques, biologiques et economiques du confinement. Trav Lab Geo116: 1-136
Hickel W (1984) Sestnu in the Wadden Sea of silt (German Bight,
North Sea). Neth Inst Sea Res 10: 113-131
Leonardi M, Giacobbe MG (2000) Hydrobiological conditions of
the Oliveri-Tindari lagoon: state of the art and study
prospects. In: Adorno F, Leonardi M, Randazzo G (eds) Atti
Cony Int "Salvaguardia e Sviluppo della Riserva Naturale
Orientata Laguna di Oliveri-Tindari" 14-16/1111996
Messina, Sicily, Fondazione Laboratorio Mediterraneo, Napoli (in press)
Leonardi M, Azzaro F, Azzaro M, Decembrini F, Monticelli LS
(2000) Ciclo della sostanza organica nell'ecosistema
lagunare eli Tindari (ME). BioI Mar Mediterr (in press)
Peres JM, Picard J (1964) Nouveau manuel de Bionomie benthique de 1a mer Mediterranee. Rec Trav St Mar Endoume
36:1-160
Raimondo FM, Rossitto M (1918) La vegetazione della laguna e
dell'arenile di Oliveri-Tindari (Messina) e problemi relatin
alla sua tutela. G Bot ltal112(4): 309-310
Walkley A, Black IA (1934) An examination of the Degtjarreff
method for determining soil organic matter, and a proposed
modification of the chromic acid titration method. Soil Sci
37: 29-38
M. Leonardi and S. Giacobbe
sent the effect of the human interventions on the
updrift areas?
Some of the data we present here leads us to
think that the six pools, during the time of their
short existence, are actually evolving in the natural direction of these environments, that is,
towards a progressive confinement, hypothesis
actually confirmed by the progressive muddying
of bottom sediments. However the organic load
does not grow proportionally, but it seems to
diminish, albeit with wide fluctuations.
The benthic communities, besides, are also
undergoing these modifications, and they tend to
organize themselves more and more in lagoontype communities. as is evident, among other
things by the growing diffusion of specific saltmarsh species (Abra segmentatum or Cerastoderma glaucum), in comparison with those which
are simply eurytopic (Paphia aurea or Nassarius
costulatus). Such a process of organization is also
highlighted by the increase of specific richness as
well as by the lower homogeneity of the trophic
structure of the communities, which tend to
become less numerous and more articulated.
At the current phase of the study we still have
not clarified whether this quantitative decrease
in the benthic communities is structural or occasional. It is however true that the density of the
populations and the TOC content of the sediments have a parallel evolution.
Without drawing too premature a conclusion, it would seem reasonable to presume that
both phenomena are manifestations of the same
evolutionary process, which push the ecosystem
towards a continuous reorganization through
biological differentiation.
Also the interference of the anthropic compartment, although it has determined fluctuations in the evolutionary trend of the system, has
not substantially modified the pathway, being
that of a progressive confinement.
References
Abbruzzese D, Aricb F (1955) Osservazioni geomorfologiche e
fisico-chimiche sui laghi di Oliveri-Tindad. Roll Pesca Piscic
Idrobioll0: 1 23
Amore C, Randazzo G (2000) Geographical and geomorphological Evolution of the Marinello-Tindari area (North Sicily). J
Coast Conserv (in press)
Azzaro F (1995) Osservazioni biennali sull'ecosistema degli stagni costieri di Oliveri-Tindari (Messina): Nutrienti e dorofilIa u. Atti Soc Ital Ecol 16: 495-497
Bramhati A (1988) Lagune e stagni costied: due ambienti a confronto. In: Carrada GC, Cicogna F, Fresi E (eds) Le Iagune
costiere: ricerca e gestione. CLEM, Massa Lubrense (Napoli),
pp 9-33
Buchanan JB, Kain JM (1971) Measurement of the physical and
chemical environment. In: Holme NA, McIntyre AD (eds)
Methods for the study of marine benthos.IPB Handbook 16:
41-65
CNR-Istituto Sperimentale Talassografico, Messina (1990)
Indagine interdisciplinare sui sistema degli stagni salmastri
costieri di Oliveri-Tindari (Messina). Rapp 4: 1-34
Crisafi E, Giacobbe S, Leonardi M (1981) Nuove ricerche idrobiologiche nell'area lagunare di Oliveri-Tindari (Messina). l.
Morfologia dei bacini e caratteristiche fisico-chimiche delle
acque e dei sedimenti. Mem BioI Mar Oceanogr II: 139-186
Crisafi P (1961) Primo contributo alIa conoscenza dei Copepodi
degli stagni litorali di Oliveri (Messina). Rapp P V Reun
CIESM 16: 841-843
Dunbar RB, Leventer AR, Stockton WL (1989) Biogenic sedimentation in McMurdo Sound, Antarctica. Mar Geo185: 155-179
Fanucd F. Fierro G, Grosso F. Piacentino GB (1973) Contributo di
una indagine sedimentologica e ricerche ecologiche nel Golfo
di La Spezia.lst Idrigr Mar 1050: 1-17
Faranda F, Gangemi G, Guglielmo L (1975) Nuove condizioni dell'arenile eli Oliveri e dei laghetti salmastri Mergolo della
Tonnara e verde (Prime osservazioni). Atti Soc Peloritana
21: 15-31
Genovese S (1964) Sali nutritivi ed attivita microbica in alcuni
ambienti salmastri. Boll Zoo! 31 (II): 409-421
Giacobbe MG, Maimone G, Azzaro F (1992) Distribuzione del
fitoplancton in un'area salmastra della Sicilia nord-orientale. G Bot Ital126: 531-547
Giacobbe S, Giordano R (1975) Prime osaervazioni sugli insediamenti bentonici della zona Iagunare di Oliveri-Tindari
(Messina).Atti Soc Peloritana 21: 169-182
Giacobbe S, Leonardi M (1986) rarea lagunare di Oliveri-Tindari:
Sue variazioni morfologiche recenti ed evoluzione dei popolamenti a molluschi In: Atti VII Congr AIOL: 355-366
Giacobbe S, Leonardi M, Azzaro F, Rinelli P (1990) Descrizione eli
un. esempio di "confinamento": l'area lagunare di OliveriTindari (Messina). Oebalia XVI-2: 675-678
Guelorget 0, Perthuisot IP (1983) Le domaine paralique: expressions geologiques, biologiques et economiques du confinement. Trav Lab Geo116: 1-136
Hickel W (1984) Sestnu in the Wadden Sea of silt (German Bight,
North Sea). Neth Inst Sea Res 10: 113-131
Leonardi M, Giacobbe MG (2000) Hydrobiological conditions of
the Oliveri-Tindari lagoon: state of the art and study
prospects. In: Adorno F, Leonardi M, Randazzo G (eds) Atti
Cony Int "Salvaguardia e Sviluppo della Riserva Naturale
Orientata Laguna di Oliveri-Tindari" 14-16/1111996
Messina, Sicily, Fondazione Laboratorio Mediterraneo, Napoli (in press)
Leonardi M, Azzaro F, Azzaro M, Decembrini F, Monticelli LS
(2000) Ciclo della sostanza organica nell'ecosistema
lagunare eli Tindari (ME). BioI Mar Mediterr (in press)
Peres JM, Picard J (1964) Nouveau manuel de Bionomie benthique de 1a mer Mediterranee. Rec Trav St Mar Endoume
36:1-160
Raimondo FM, Rossitto M (1918) La vegetazione della laguna e
dell'arenile di Oliveri-Tindari (Messina) e problemi relatin
alla sua tutela. G Bot ltal112(4): 309-310
Walkley A, Black IA (1934) An examination of the Degtjarreff
method for determining soil organic matter, and a proposed
modification of the chromic acid titration method. Soil Sci
37: 29-38