||Mangroves, the woody plants, mainly grow in tropical or subtropical intertidal estuaries. In order to adapt to the environment of intertidal estuaries, mangroves develop the special characteristics of “aerial roots”, “prop roots”, “viviparous seeds”, and simpler plant groups. In Taiwan, mangroves mostly grow in the west coast, from Danshui to Pingdong. Mangrove forests, which have long be called as “sea forest”, are the unique ecological landscapes.|
This study aims to investigate the main mangrove forests areas in the Tainan City and Tainan County and their cultivating situations. The investigation areas include the mouths of the main rivers, coastal areas, salt fields, fishponds, and coastal marshes. The dominant components of Taiwan’s mangroves are Avicennia marina（Forsk.）Vierh（Vierbenaceae）, Kandelia obovata Sheue,Liu＆Yong，Rhizophora stylosa Griff（Rhizophoraceae）and Lumnitzera racemosa Willd（Combretaceae）. Besides, there are 90 associated plants of the mangroves, which belong to 30 families and 76 genera. After investigating, it reveals that Avicennia marina is the more superior specie; Lumnitzera racemosa and Rhizophora stylosa mostly exist in Tainan City, while their cultivating groups can only be found in Shuangchun District in Tainan County; Kandelia obovata is mainly found in Tainan County, and scattered in Sihcao and the bank of Yanshuei stream in Tainan City. Protected areas have been set up in Beimen and Cigu of Tainan County and Sihcao of Tainan City. Man-made conservation areas include Shuangchun in Tainan County and An-ping harbor area in Tainan City. The mangrove plants existing in the areas mentioned above grow well. Moreover, people in Tainan City also plant many mangroves privately.
Because of diking fishponds and quickly developing cities in past few years, many mangroves have disappeared. The previous investigations about the mangroves in Southern Taiwan were focused more on Kaohsiung area than in Tainan City and County. For this reason, hopefully the results of this study can make the information of the mangrove forests in the west coast of Taiwan more complete. Three suggestions about the conservation and cultivation of mangroves are listed as follows: (a) keeping the watercourses smooth, (b) deliberately evaluating the cultivation areas, and (c) increasing the habitats in the tidal zones.