Effect of inundation regime on herbaceous diversity at Gao Giong Melaleuca forest management board Dong Thap province

Abstract

The study was carried out 3 field campaigns from December 2014 to October 2015, the first time in the end of the flooding season (December 2014), the second time in the mid-dry season (from April to June 2015) and the third at
the beginning of the flooding season (from September to October 2015) to assess the influence of inundation regime and seasonal to herbaceous diversity. The results show that the study area has 6 inundation regimes. Biodiversity
indexes varied with the seasonal, it was lower during the rainy season than during the dry season in the inundation regime 1, 2, 3, and 5. Conversely, in the inundation regime 4 and 6, biodiversity indexes were higher during the dry
season than during the rainy season. During the dry season, the diversity was highest in the inundation regime 5 and lowest in the inundation 6, while the diversity was lowest in the inundation regime 6 and highest in the inundation 4 during rainy season. Therefore, it is necessary to localize the grasslands by dike system to regulate water in the inundation regime 5 in dry season and in the inundation regime 4 in rainy season.