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Journal : Jurnal Ilmu Dasar

Relationship between the Ecological Factors with Community Stucture of Mangrove in Pang-Pang Bay Alas Purwo National Park Acik, Rifan; Sudarmadji, Sudarmadji
Jurnal ILMU DASAR Vol 18 No 1 (2017)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (168.347 KB) | DOI: 10.19184/jid.v18i1.2753

Abstract

The Mangrove ecosystem has benefits, one of them as the buffer ecosystem. This research has purpose to know the relationship between community structure of Mangrove and the ecologycal factor in Pangpang bay, Alas Purwo National Park. The result from this research are Rhizophora apiculata has highiest INP is 96,44, Sonneratia alba has lowest INP is 35,47. Dominance indeks had by Ceciops tagal is 4,70. Diversity indeks of stiks Mangroves shown low value with Shanon Weiner (H') <0,32. Result of community coefisien shown that Rhizophora apiculata is 0,315. The result is ecologycal factor community structure have relation significantly.
Effect of Environmental Factors on The Relative Fitness and Spatial Distribution of Mangrove Crabs (Scylla spp) in Blok Bedul Segoro Anak, Alas Purwo National Park, Indonesia Mahfud, Mohamad Zaenal; Sudarmadji, Sudarmadji; Subchan, Wachju
Jurnal ILMU DASAR Vol 18 No 2 (2017)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.933 KB) | DOI: 10.19184/jid.v18i2.3909

Abstract

The mangrove forest are natural and renewable. resources Mangrove has the physical, chemicaland biological function which highly support the fulfillment of human needs and serve as a bufferbalance of the ecosystem in coastal areas. One of the functions associated with the mangrovebiological existence as a source of diversity of marine life. Marine life is affected by the presenceof mangrove forests among mangrove crab (Scylla serrata) to maintain the ecological balance andcause the energy cycle running fast. This study aims to determine the condition of environmentalfactors, the relative fitness and spatial distribution of mangrove crabin the mangrove forests BlockBedul Kali Segoro Alas Purwo National Park. Data from the study are described and classified bysimilarity of environmental factors, then performed multiple linear regression betweenenvironmental factors with relative fitness and spatial distribution of mangrove crabs. The resultsshowed that the average relative fitness mangrove crabs at all the research station is 69 with astandard deviation of 13.51. Spatial distribution of mangrove crab at any observation station isless than 1, so it can be concluded that the distribution is uniform. Environmental factors withrelative fitness mud crab significant correlation, but no significant correlation betweenenvironmental factors with the spatial distribution of mangrove crabs. Keywords: Relative Fitnes Crab Mangrove, Mangrove Crab Spatial Distribution, Alas Purwo National Park
Population Dynamics of Bemisia tabaci Genn. and Type of Predators Found on the Edamame Soybeans (Glycine max L.) in Mangli Jember Wijayanto, Tulus; Sudarmadji, Sudarmadji; Purwatiningsih, Purwatiningsih; Purnomo, Hari
Jurnal ILMU DASAR Vol 18 No 2 (2017)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (318.323 KB) | DOI: 10.19184/jid.v18i2.4116

Abstract

The study was conducted at the edamame plantation area of PT. Mitra Tani 27 Jember with the size of 31.6 m x 29.8 m. The sampling of imature B. tabaci was done by collecting the samples of leaves from the five plots of planting. The adult samples were taken by setting some yellow traps with the size of 20 x 30 cm. The results showed that the populations of B. tabaci changed during the growing season of edamame, the older the plants grow, the greater number of the populations. The highest number of B. tabaci adult population was in the age of 10 weeks after planting, those were 818 B. tabaci. The increase of the B. tabaci population had a significant correlation with the increase of the predators population on edamame. There were seven species of predators founded at the edamame. The highest number of predator founded was Coccinella transversalis and the lowest number of predator was Coccinella septempunctata. Keywords: Bemisia tabaci Genn., edamame Soybeans, yellow traps, C. transversalis
The Relationship between Portunidae Diversity and Mangrove Density at Popongan Coastal Baluran National Park, East Java Indonesia Dewi, Yuni Kartika; Purnomo, Hari; Sudarmadji, Sudarmadji
Jurnal ILMU DASAR Vol 18 No 1 (2017)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (283.468 KB) | DOI: 10.19184/jid.v18i1.2354

Abstract

This research was conducted in the mangrove forest of Popongan beach at Baluran National Park, East Java. The aim of this research was to determine the relationship between mangrove density and Portunidae diversity in mangrove forest at Popongan beach. Line transect method was used in this research. There are three transects consist of 17 plots, each plot sized 20m x 20m. The data analysis were done by using Person correlation and linear regression R Program. The results showed p-value 0,003, it means there is relationship between Portunidae diversity and the mangrove density. The temperature and tide showed p-value < 0,005, that means the abiotic factors affect Portunidae diversity in mangrove. The Portunidae diversity at mangrove forest of Popongan beach is relatively low (H’value 0,152). There were five species was found, there were Charybdis (Charybdis) miles, Podhopthalmus vigil, Portunuspelagicus,Scyllaserrata,and Thalamita crenata. The dominant species in this mangrove forest is Thalamita crenata. The composition of mangrove forest vegetation were Rhizophora apiculata, Ceriops tagal, Lumnitzera racemosa, Rhizophora stylosa, Sonneratia alba, Bruguiera gymnorrhiza, Pemphis acidula, dan Xylocarpus moluccensis. The dominant vegetation in this mangrove forest is Rhizophora apiculata.