Is damage susceptibility linked to coral community structure ? A case study from South Africa

نویسنده

  • Peter A. COOK
چکیده

Korallenvergesellschaftungen wurden mittels der Schnurtransekt Methode untersucht. Drei Gesellschaftstypen, welche an bestimmte geomorphologische Eigenschaften ihres Sandsteinsubstrats gebunden waren, worden gefunden. 1) Fossile DUnen wurden zwischen 8 und 24 m Tiefe yon Alcyonacea dominiert. 2) Flache Sandsteinriffe zwischen 18 und 24 m worden yon Scleractinien (vor allem Acropora) dominiert.lnnerhalb dieser Gesellschaftstypen wurdeeine weitereDifferenzierung in verschiedene Untergesellschaften innerhalb und auBerhalb sandiger Graben beobachtet. 3) Tiefe HartOOden zwischen 25 und'34 m worden yon Schwarnmen, Aszidien und Seefachem dominiert. Korallen-Gesellschaftsstruktur wurde mit quantitativen Daten fiber Schadenshaufigkeiten korreliert. Die Acropora-Gesellschaft der flachen Riffe zwischen 18 und 24 m zeigte die hochsten Schadenswerte und wurde als die empfindlichste Gesellschaft angesehen. Die anderen Gesellschaftstypen, welche yon ledrigen Weichkorallen oder yon Schwiimmen dominiert waren, worden als robuster eingeschatzt. Solche Analysen sind fUr die Entwicklung yon Zonierungsplanen in Meeresreservaten wertvoll. Abstract

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تاریخ انتشار 1995