Mangrove ecosystem is "ekoton" {transition area) a unique and rich diversity of flora and fauna. Mangrove island of Java and Bali experienced over the function as with increasing population density and the depletion of land resources. Mangrove opened for pond construction, tourism facilities as well as the timber for the needs pengarnbiian household. Transfer function leads to environmental degradation and mangrove health condition.
This study aims to see the influence of geographical conditions on h ~ kewaan mangrove and know the quality of the environment and the health condition of mangroves. This study located in the Gulf and the Gulf Banyuwedang pickpocket, Village Pejarakan, Gerokgak District, District
Buleleng. Bali province. Buian study was initiated in November 1999 until March 2000. D'methods used to retrieve data mangrove transects in the field is quadratic. Mangrove canopy by category using transects measuring 10 X 10 m2, Belta 5 X 5 m 2, and seedling 1 X 1 m2. Bay community consists of three sub Banyuwedang community and the Gulf communities Pickpocket consist on 2 sub community. Secondary data used in this study, among others: Map Topographic Sheet 1707-531 BAKOSURTANAL Goris Scale 1: 25,000 (BAKOSURTANAL, 1992), Map Digital Topographic Maps Digital Database BAKOSURTANAL Sheet No. 1. 1707-531 (BAKOSURTANAL, 1999), Bali Maps Paleo Ecology (Encarta Interactive World Atlas, 2000), Map The slope Slope Park West Bali Nasionab Skaia 1: 25,000 (TNBB, 1997) as well as data distribution
In September 1999 the coral reefs in the Gulf of Bishopscourt (Wijonamo, 1999) Mangrove community environmental quality is measured using six indicators (Lower Mississippi Valley Division, 1976 in Canter and Hill, 1981), the association of species, the closure of seedlings, canopy closure, the number of types of seedlings, the number of days inundated, and the affected area tides. This study only uses four indicators kuaiitas mangrove environment, ie associations of species, seedling closure, canopy closure, and the number of seedling species that are the result modification (dimodiikasi by: Joko Purwanto). lndeks ecological communities that use 'is lndeks Simpson dominance (C), Diversity lndeks Sharmon - Weaver (H '), and uniformity index Shannon - Weaver (E).
The health condition of mangrove mangrove leaf diiihat based morphometric (comparison leaf width to length) of a population. Measurement of the population leaves dllakukan Avicennia marina, Rhizophora apiculata, Rhizophora mucronata, and Ceriops species fagalsebagai most often found. Morphometrics of healthy mangrove leaves should be relatively constant at between individuals in a population. The constancy of the population can be seen many jumiah morphometric and morphometric variability based on coefficient values in a population. More and more little morphometric population and the greater the value of the coefficient of variability of a population will become more healthy.
In this study several conclusions can be drawn. First, some parameters geogratis, such as: forms of streams, point elevation and slope of the land as well as the geological history of the island of Bali affect the existence of mangroves in the area of Bishopscourt. These conditions affect pernbentukan two different mangrove zonation and ketebalanya composition, ie mangrove zonation Bay Bay Bishopscourt dm pickpocket. Second, based on quality indicators neighborhood, Gulf Banyuwedang change of condition by 31% ideal while the pickpocket Gulf by 29%. community ecology indices indicate that the Gulf Banyuwedang mengaiami changes from the ideal conditions of 36%, while the Gulf of pickpocket 12%. The values above indicate that the environmental quality of mangrove Bay Bishopscourt more worse than Teiuk pickpocket. The situation is caused by land use over many pewbahan land as well as tourist and resident aktititas that occurred around the Bay Bishopscourt than the Gulf Pickpocket. Third, based on morphometric leaves, mangrove health conditions in Bishopscourt generally relatively less healthy because of morphometric leaf on the populations relatii not a constant. Mangrove populations in the Gulf Banyuwedang turnbuh have health conditions that More worse than the health condition of mangroves in the Gulf Bajui. It is caused by low Banyuwedang Gulf environment when compared with the Gulf pickpocket. Besides kualiatas environment, the location where the mangroves grow also affects the health condition of mangroves. Rhizophora apiculata and Rhizophora mucronata are both present in populations growing at
Avicennia marina zone while the leading edge and Ceriops fagal good health found in populations living in the inner zone. Advice that can be drawn from this study is the Park West Bali Nasionai need coordinate with the communities around Banyuwedang so as not to throw garbage into the the sea and stop the encroachment on a large scale. Need for handling of that liquid waste to be dumped into the bay waters around Bishopscourt, for example waste from of hot spring baths that can affect ecosystems around the bay, such as coral reefs, and mangroves.
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