Suhardjono Suhardjono

Bio: Suhardjono Suhardjono is an academic researcher from Indonesian Institute of Sciences. The author has contributed to research in topics: Mangrove & Rhizophora apiculata. The author has an hindex of 2, co-authored 8 publications receiving 11 citations.

Mangrove plant diversity in Sepanjang Island, East Java

Abstract: Inventarisasi flora mangrove di Pulau Sepanjnag telah dilakukan. Tercatat 36 jenis tumbuhan mangrove tersebar di 8 lokasi (Pajang Barat, Segentong, Dermaga Sepanjang, Turunan Ceremeh, Calung dan Tarungguk.). Sekitar 23 jenis diantaranya telah ditetapkan oleh IUCN (Anonim 1997) sebagai tumbuhan langka dengan status kelangkaan terkikis (LR) sampai kritis (CR). Rhizophora apiculata, Ceriops tagal,C. decandra, Bruguiera gymnorrhiza, Excoecaria agallocha, Xylocarpus moluccensis, X. granatum dan Lumnitzera racemosa, merupakan jenis-jenis yang dijumpai hampir di seluruh lokasi. Sedangkan beberapa jenis hanya ditemukan di lokasi tertentu seperti Calophyllum inophyllum dijumpai di Pajan Barat, Caesalpinia bundoc, Scaevola taccada dan Wedelia biflora di Tanjung Perak, dan Bruguiera sexangula hanya ditemukan di Tanjung Kiaok.© 2007 Jurusan Biologi FMIPA UNS SurakartaKey words: Mangrove, Sepanjang islands.

Hutan Mangrove Di Yenanas, Pulau Batanta, Kabupaten Raja Ampat, Propinsi Papua Barat

Abstract: A reseach on mangrove vegetation has been conducted in Yenanas, Batanta Island, Raja Ampat Distric, PapuaBarat Province. The results showed that the diversity of mangrove in Kalitoko was relatively high. About 78 speciesof mangrove (61 genera and 42 families) has been recorded among them, 27 species were classified as rare speciesbased on IUCN list with status VU and CR. The result of vegetation analysis analysis of six transect which cover8,200 m2 of mangrove forest in this location recorded 10 species of mangrove plants with level density was 834-1,244 individual/ha and its basal area was 35.38-123.53 m2/ha. For the sapling the density was 440-1,714individual/ha and its basal area 1.48-4.93 m2/ha. While the seedling density up to 86,364-222,500 individual/ha. Key word : Mangrove Forest, Yenanas, Batanta Island, Raja Ampat Distric, Papua Barat Province

Floristics of mangrove tree species in Angke-Kapuk Protected Forest

Abstract: Angke-Kapuk Protected Forest with total area 44.76 ha is part of the Tegal Alur-Angke Kapuk mangrove forests. Therefore, this forest has important role as an interface between terrestrial and marine ecosystems, whether physical, biological or social-economic aspects, to determine mangrove ecosystem as a productive and unique ecosystem in the coastal area. However, the study of floristic of the mangrove vegetation in this forest has never to be done previously. According to the study on September to November 2003, in this forest found 8 species of mangrove trees. The tree species can be classified into two groups. The first group is true mangroves (7 species), i.e. Avicennia officinalis, Rhizophora apiculata, R. mucronata, R. stylosa, Sonneratia caseolaris (major component), Excoecaria agallocha, and Xylocarpus moluccensis (minor component). The last group is mangrove associate, i.e. Terminalia catappa. In this forest also found 7 tree species, i.e. Bruguiera gymnorrhiza, Calophyllum inophyllum, Cerbera manghas, Paraserianthes falcataria, Tamarindus indicus, Acacia mangium, and A. auriculiformis as introduced species. The growth level of B. gymnorhiza, C. inophyllum and C. manghas up to now is seedling and sapling, while the growth level of another introduced species is till in pole and tree.

Hutan Mangrove Cagar Alam Pulau Sempu, Jawa Timur

Abstract: Keanekaragaman jenis tumbuhan mangrove di Ra’as, Air Tawar dan Teluk Semut, Pulau Sempu, Jawa Timur tercatat 30 jenis tumbuhan yang termasuk dalam 18 suku dan 24 marga. Dua belas jenis di antaranya termasuk dalam Kriteria IUCN (Anonymous, 1997). Kenakearagaman jenis yang paling tinggi di Ra’as (23 jenis), Teluk Semut (17 jenis) dan Air Tawar (16 jenis). Hutan mangrove di daerah ini didominasi oleh Ceriops tagal, Rhizophora apiculata, R. mucronata, Aegiceras corniculatum, Xylocarpus granatum dan Excoecaria agallocha. Kata kunci : Mangrove, Ra’as, Air Tawar, Teluk Semut, Pulau Sempu, Jawa Timur, IUCN.

Keanekaragaman tumbuhan vegetasi hutan mangrove di tumbu-tumbu, lampeapi dan wungkolo, pulau wawonii, sulawesi tenggara

Abstract: Fifty four species belong to 32 families and 46 genera were recorded in mangrove areas of Tumbu-tumbu, Lampeapi and Wungkolo(Wawonii Island, South East Sulawesi). Twenty four of them included in the IUCN (Anonim, 1997) list. The richest species diversity found in Lampeapi (48 species) followed by Tumbu-tumbu (39 spesies) and Wungkolo (29 species).The dominant species of those areas were Rhizophora apiculata, R. mucronata and Bruguiera gymnorrhiza.The total average density of three was 268–742 individu/ha, with basal area 16.14–28.99 m 2/ha, sapling plant was 66–317 indv./ha will basal area 0.38–0.92 m /ha and seedling plant was 88,13 –146,66 individu/ ha.

Comparison of true mangrove stands in Dudepo and Ponelo Islands, North Gorontalo District, Indonesia

Abstract: Abstract. Kasim F, Kadim MK, Nursinar S, Karim Z, Lamalango A. 2019. Comparison of true mangrove stands in Dudepo and Ponelo Islands, North Gorontalo District, Indonesia. Biodiversitas 20: 359-366. This study aimed to investigate and compare the current status of mangrove areas, as well as the composition and species diversity of mangrove stands in both regions of Dudepo and Ponelo Islands. The results showed that the mangrove areas calculated using the segmentation method in classifying image of Landsat-8 OLI (acquisition on September 2017) were 279.46 ha (Dudepo Island) and 113.35 ha (Ponelo Island) respectively. A total of 13 species of true mangrove were recorded from both islands, using survey method from 9 transect lines (TL), with a distance ranging from 40 to 210 meters (1-6 quadrats) per transect. The mean densities of trees were 2133 ± 329.78 ha-1 (Dudepo Island) and 2111 ± 234.28 ha-1 (Ponelo Island), while those of saplings and seedlings were 58 ± 13.48 ha-1 and 1425 ± 113.96 ha-1 (Dudepo Island), and 79 ± 14.51 ha-1 and 2963 ± 443.22 ha-1 (Ponelo Island). The mean diameter and basal area were 19.73 ± 10.65 cm and 84.22 ± 67.67 m2ha-1 (Dudepo Island), 17.04 ± 1.46 cm and 60.07 ± 15.12 m2ha-1 (Ponelo Island), respectively. The Importance Value Index (IVI) ranged between 3.97-114.87 (Dudepo Island) and 6.04-82.18 (Ponelo Island). The dominant and codominant species based on IVI in both islands were Rhizophora apiculata Blume and R. stylosa Griff. The indexes of diversity, richness, and evenness of mangrove species in both islands were 0.34-1.70, 0.48-1.18, 0.47-0.94 (trees), 0.00-1.10, 0.00-1.82, 0.00-1.00 (saplings), and 0.00.-1.48, 0.00-1.44, 0.72-1.00 (seedlings), respectively. The Bray-Curtis similarity index between Dudepo and Ponelo Islands, based on the overall values of community attributes, was 0.75.

Diversity and biomass of tree species in Tambrauw, West Papua, Indonesia

Abstract: Robiansyah I. 2018. Diversity and biomass of tree species in Tambrauw, West Papua, Indonesia. Biodiversitas 19: 377-386. In spite of its high diversity and endemism, New Guinea is still one of the least explored regions on the globe. Flora information for the island as a whole is low compared to other areas in Malesia, and for Indonesian Province of Papua and West Papua it is much lower than for Papua New Guinea. To add more information and data on the flora of the West Papua Province, a vegetation analysis was conducted in Fef (442-509 m) and Bamusbama (757-914 m) Subdistricts, Tambrauw District, West Papua, Indonesia. Six and four plots of 30x30 m were placed in Fef and Bamusbama, respectively, to assess and compare the diversity and biomass of trees with diameter at breast height ? 10 cm. A total of 457 stems and ca. 86 tree species were identified. Fef accommodated higher species number (70) than Bamusbama (42). Meliaceae and Myrtaceae were the most important families in Fef and Bamusbama, respectively, while Castanopsis acuminatissima was the most important species in both subdistricts.The species diversity, richness, and evenness in Fef was higher than in Bamusbama. For tree biomass, the estimated value in Bamusbama (383.8 ton/ha) was much higher than in Fef (224.7 ton/ha). The results of the present study may serve as a baseline information for sustainable forest management and conservation of the region.

Species Diversity, Biomass, and Carbon Stock Assessments of Mangrove Forest in Labuhan, Indonesia

Abstract: Mangroves provide numerous ecosystem services, including fisheries production, nutrient cycling, soil formation and carbon storage. However, the forests and their habitat have degraded rapidly due to anthropogenic threats. Consequently, the loss of carbon (C) stored in these ecosystem is inevitable. The purpose of this study was to evaluate the species diversity of mangrove forest of Labuhan, Lamongan regency, Indonesia and evaluate its above-ground and below-ground-root biomass and C. Twenty-four plots with a size of 10x10 m were carried out using the quadrat sampling technique to identify, record and measure the DBH of the trees. The Shannon – Wiener's diversity index (H'=1.51) was moderate, having a total of nine true mangrove forests dominated by Rhizophora mucronata and Rhizophora apiculata with an importance value index of 100.40% and 80.46% respectively. The total C stored in above-ground and below-ground-root was 74.70 ± 15.58 Mg C ha-1, which is equivalent to total CO2 sequestration of 274.15 ± 57.18 Mg CO2 ha-1. This study suggests that the Labuhan mangrove forest has a potential to store and sequester a substantial amount of atmospheric C; therefore, it is needed to protect and sustainably manage this important forest.

Attenuation of Solitary Waves and Wave Trains by Coastal Forests

Abstract: Aus vielen Berichten nach dem Tsunami 2004 wurde die Schutzwirkung der Kustenwalder mehrfach bestatigt, obwohl bislang die Dampfungsprozesse weitgehend unbekannt waren und hierfur kein verlasslicher Nachweis durch prozessbasierte Modelle vorlag. Vor diesem Hintergrund und dem Hintergrund des Wissensstandes besteht das Hauptziel dieser Studie darin, das Verstandnis der Prozesse substantiell zu verbessern, die fur die Dampfung von Tsunami/Windwellen durch Kustenwalder verantwortlich sind. Den Schwerpunkt der Arbeit bilden die Entwicklung und systematische experimentelle Verifizierung eines neuen prozess-basierten Verfahrens zur Parametrisierung steifer und flexibler Walvegetation hinsichtlich des Stromungswiderstands. Mit den anhand dieses neuen Verfahrens ermittelten parametrisierten Modellbaumen wurden systematische Untersuchungen uber die Dampfungswirkung der o.g. zwei Waldtypen in den beiden Wellenkanalen des Leichtweis-Instituts durchgefuhrt. Tsunami-ahnlichen solitaren Wellen sowie regelmasigem und unregelmasigem Seegang wurden generiert. Berucksichtigt wurden sowohl globale Prozesse (hydraulische Wirksamkeit) als auch lokale Prozesse (z.B. Stromungswiderstand). Hinsichtlich der numerischen Modellierung wurde das nichtlineare Flachwasserwellen-Modell mit den aus den Experimenten gewonnenen Stromungswiderstandskoeffizienten implementiert und Daten erfolgreich validiert. Das validierte Modell wurde zur Durchfuhrung einer systematischen Parameterstudie eingesetzt, die in die Entwicklung einer neuen Formel zur praktischen Ermittlung der hydraulischen Wirksamkeit von Kustenwaldern als Funktion eines dimensionslosen Parameters resultierte. Dieser Parameter fasst sinnvollerweise die Einflusse der Breite und Dichte des Kustenwaldes sowie der Wellenhohe und Wassertiefe am Vorlandfus zusammen. Daruber hinaus wurden Empfehlungen fur die praktische Bewertung der hydraulischen Wirksamkeit von Kustenwaldern zur Risikoreduzierung bei Tsunami und Sturmfluten ausgearbeitet.

CONSERVATION EFFORT of Acanthus ilicifoliusIN LAMPUNG MANGROVE CENTER

Abstract: Jeruju (Acanthus ilicifolius) is naturally herbs that found in area of mangrove forest. Jeruju is also used as an environmental indicator for good maintanance of mangrove forest. This study aims to identify the conservation efforts of Margasari villagers related to the utilization of Jeruju (Acanthus ilicifolius). This research was conducted in March 2017 in Lampung Mangrove Center, Lampung Timur District, Lampung Province, Indonesia. The research methods is questionnaire with 97 female respondents. The result were described that the aspect of Protection, with one activity to protect of leaves Acanthus 47%. Utilization aspects, with five activities : (1) non-timber forest products 100%; (2) utilizing environmental services 85.6%; (3) utilizing plants for food preparations 38.1%; (4) utilizing plants to increase the economy of communities 43.3%; (5) future utilization plant for the next generations 50.5%. The aspect of Preservation, with two activities: (1) Preservation of Acanthus leaves 43.3%; (2) preservation of environmental ecosystem of mangrove forest 74,2%.