Invasive Species Compendium

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Abstract

Study on the Macrophyte composition of Hakaluki Haor.

Abstract

Hakaluki Haor is located in the North-East of Bangladesh it belongs to two districts Moulvibazar (70% of the territory) and Sylhet (30% of the territory) under Sylhet division. Hakaluki Haor is one of the Ecologically Critical Area (ECA) which was once with plenty of aquatic resources including swamp forest. Macrophyte is the integral components of wetlands which are amongst the most productive ecosystems on the earth. The present investigation was carried out to study the aquatic microphyte composition and their seasonal variation in Hakaluki Haor. The survey was carried out from April 2012 to March 2013 during pre-monsoon, monsoon, post-monsoon and winter. A total of 142 macrophyte belonging to 102 genera under 49 families were recorded during the investigation period. Of these, Dicotyledonous by 65 species, 54 genera and 33 family and Monocotyledonous by 73 species, 47 genera and 13 family and 4 species under pteridophytes group. In the study area dominant family was Poaceae followed by Cyperaceae, Asteraceae, Scrophulariaceae, Amaranthaceae and Hydrocharitaceae. Out of 142 species medicinal plants (57 sp.) and followed by weeds (51 sp.), vegetables (12 sp.) and others (22 sp.). Significant seasonal variation observed in the study area. Highest numbers of species were recorded in winter (107sp.) followed by Pre-monsoon (89 sp.), post-monsoon (62 sp.) and monsoon (49 sp.). From the study all most all macrophytes were recorded and observed significant seasonal variations. Four macrophytes (Salvinia cuculata, Salvinia natans, Marsilea quadrifolia, and Diplazium esculentum) were recorded from study area those were under pteridophytes group and three invasive species (Eichhornia crassipes, Ipomea fistula and Croton bonplandianum) recorded from Hakaluki Haor. Fourteen macrophyte were identified and designated as locally threatened in the Hakaluki Haor.