Tugu sub-district has a mangrove ecosystem that is better than the other three sub-districts in Semarang City. The improvement of the mangrove ecosystem in Mangunharjo Village became the main of priority for mangrove rehabilitation This study aimed to determine the level of diversity of mangrove species found in the mangrove ecosystem of Mangunharjo Sub-District, Tugu District, Semarang City based on the zonation. The study was conducted in February-March 2018. Sampling using a combination method, that are systematic sampling with vegetation analysis techniques using quadrat sampling technique. There are three data collection stations determined based on the distance from the coastline to the mainland. Data were analyzed using quantitative descriptive statistics. The results showed that the diversity of mangrove species found in Mangunharjo Village had a low to moderate diversity level (0.72-1.32). The mangrove ecosystem in Mangunharjo is actually artificial ecosystem, with the type and number of mangroves dominated by Rhizophora mucronata and Avicennia marina. There are seven mangrove species found in the open zone, four species in the middle zone and four species in the land zone.   Kecamatan Tugu memiliki ekosistem mangrove yang masih baik dibandingkan dengan tiga kecamatan lainnya yang berada di Kota Semarang. Perbaikan ekosistem mangrove di Kelurahan Mangunharjo menjadi prioritas utama rehabilitasi mangrove. Penelitian ini bertujuan untuk menentukan tingkat keanekaragaman spesies mangrove yang terdapat di ekosistem mangrove Kelurahan Mangunharjo Kecamatan Tugu Kota Semarang berdasarkan zonasinya. Penelitian dilakukan pada bulan Februari–Maret 2018. Pengambilan sampel menggunakan metode kombinasi, yaitu antara systematic sampling dengan teknik analisis vegetasi menggunakan quadrat sampling technique. Terdapat tiga stasiun pengambilan data yang ditentukan berdasarkan jarak dari garis pantai hingga daratan. Data dianalisis secara statistik deskriptif kuantitatif. Hasil penelitian menunjukan bahwa keanekaragaman spesies mangrove yang terdapat di Kelurahan Mangunharjo mempunyai tingkat keanekaragaman rendah hingga sedang (0.72-1.32). Hal ini dikarenakan ekosistem mangrove wilayah Mangunharjo merupakan ekosistem buatan, dengan jenis dan jumlah mangrove yang dominasi oleh Rhizophora mucronata dan Avicennia marina.  Terdapat tujuh spesies mangrove yang ditemukan pada zona terbuka, empat spesies pada zona tengah dan empat spesies pada zona daratan.

Mangrove ecosystems are one of the potential ecosystems to be developed as ecotourism areas. This study was designed to analyze the suitability of mangrove areas as objects of attraction in ecotourism development in Mangunharjo Village, Tugu District, Semarang City. This study looked at 5 variables, namely mangrove type, mangrove density, biota association,  thickness, and tides. Sampling was carried out at 3 stations, 10 plots each. Density data collection is done by counting each individual on each species in a sampling quadrant of 10 x 10 m. Identification of mangroves is carried out by Wetlands. The identification results recorded 8 species of mangrove plants found at the research station. A. marina and R. mucronata species are most commonly found at each station. Biota found in mangrove areas is quite diverse. The tides in the Mangunharjo area are not too high, so it is an area that is classified as very suitable for ecotourism development. The suitability of the Mangunharjo coastal tourism area for the development of marine ecotourism areas for the three stations in the category is very suitable to match the IKW value of 68.42 - 96.05%.