Forest Dynamics of Peat Swamp Forest in Sebangau, Central Kalimantan

Forest dynamics were studied from 1999 to 2001 for individuals > 15 cm in girth of 24 most common species in six 0.25-ha plots. The plots were set up in natural peat swamp forest in the upper catchments of Sebangau, Central Kalimantan. Aim of the study is to understand the dynamics and vegetation changes of forest studied during period of study. The peat swamp forest in the study site might be categorized as moderately forest dynamic in term of rate of growth, mortality and recruitment. Annual relative growth rate and mortality rate was comparable to previous study but recruitment rate relatively higher. There was significant effect of diameter class on annual growth rate, but not to mortality rate. Even not too strong two environment factors (peat depth and distance to river) were significant correlated with rate of mortality and recruitment. During two-year period study there was no significant changes in vegetation structure

Vegetation analyses of Sebangau peat swamp forest, Central Kalimantan

Mirmanto E (2010) Vegetation analyses of Sebangau peat swamp forest, Central Kalimantan. Biodiversitas 11: 82-88. The vegetation analysis study has been made in Sebangau peat-swamp forest, Central Kalimantan. Eight permanent plots of 50-m x 50-m were set-up distribute from close to the river with shallow peat-layer up to the inland with relatively deep peat-layer. Enumeration of trees (GBH > 15 cm) was conducted in all of 8 plots. Overall there are 133 species (taxa) were recorded within 8 plots belong to 34 families where Dipterocarpaceae, Clusiaceae, Myrtaceae and Sapotaceae were the most dominant family. Out of all species recorded, Combretocarpus rotundatus, Palaquium leiocarpum, Stemonurus scorpioides and Tristania whittiana were the most dominant species. Two community’s types namely Combretocarpus rotundatus-Shorea balangeran community and Palaquium leiocarpum-Eugenia densinervium community were recognized and they distributed in slightly different habitat condition. The sequence of these two communities’ shows significantly related to both distances to river and peat-depth. In addition there was indication the presence of habitat preference among tree species

Permudaan Alami Dalam Hutan Bekas Tebangan Di Sekundur, Sumatra Utara

A phytososiological analysis of saplings was made using quadrate method in the six yearsold logged-over forest at Sekundur, North Sumatra. The results showed that within 0.2hectare plot, 123 species belonging to 79 genera and 36 families were recorded. Threecommunity types were recognized, i.e. Agrostistachys longifolia - Teijsmanniodendronsarawakanum, Macaranga hypoleuca - Macaranga pruinosa and Endospermummalaccensis - Macaranga javanica communities. The structure and floristic compositionof each community varies and they were related primarily with the forest distur¬bance.There were found that the number of both species and individuals of sapling decreasedwith increasing of the forest disturbanc

Komposisi Flora Dan Struktur Hutan Alami Di Pulau Ternate, Maluku Utara

Vegetation Analysis of Natural Forest in Ternate Island, North Maluku. A vegetation analysisof the Ternate natural forest has been conducted by establishing 9 plots of each 30-m x 30-m.All trees (dbh. e”10 cm) within all plots were measured, their positions were determined, andtheir species were identified. In total there were 68 tree species recorded within plots belongingto 34 families. Trichospermum morotainense was the most common species, followed byAlbizia falcataria, Elmerilla ovata, Cordia mixa, and Macaranga longicaudatum. Almost allof the common species such as A. falcataria, Tristiopsis canarioides, Pometia pinnata, E.ovata and Intsia bijuga were found as emergent or canopy trees. According to the ordination(DCCA) analysis there were at least three tree species associations which were related tohabitat characteristics (conditions). However the population\u27s dominant species varied amongsites, which might be related to the habitat characteristics and/or effects of human activities inthe past

Permudaan Alami Kawasan Hutan Resort Cidahu, Taman Nasional Gunung Halimun–salak, Jawa Barat

Kajian permudaan alami di kawasan hutan Taman Nasional Gunung Halimun–Salak, Jawa Barat telah dilakukan dengan tujuan untuk mengungkap pola dan proses ekologi serta suksesi hutan. Sebanyak 27 petak (10 m x 10 m) telah dibuat dan pada setiap petak dilakukan pengukuran terhadap anakan pohon (diameter 2–5 cm), yang meliputi diameter setinggi 50 cm di atas tanah, tinggi dan posisi di dalam setiap petak. Setiap jenis yang tercatat dibuat spesimen bukti ekologi, untuk identifikasi jenis. Dalam 27 petak tercatat paling tidak sebanyak 73 jenis anak pohon,yang terdiri atas 51 marga dan 29 suku. Macaranga triloba tercatat sebagai jenis dominan hanya pada 9 petak, sedangkan 4 jenis lainnya kurang dari 5 petak. lni menunjukkan adanya variasi komposisi jenis antar petak yang tinggi, yang berkaitan dengan kondisi habitatnya. Adanya penyebaran jenis tertentu pada habitat tertentu pula, menunjukkan adanya keterkaitan antara keberadaan suatu jenis dengan habitat tertentu. Ketinggian tempat dan penutupan kanopi diduga sangat berpengaruh terhadap terbentuknya tipe komunitas

Penelitian Ekologi Hutan Di Pulau Natuna: Status Hara Daun Dan Serasah [Forest Ecological Studies in Natuna Island: Leaf and Litter-fall Nutrient Status]

Forest ecological study with special attention to leaf and litterfall nutrient status has been conducted in several forest types at Natuna Island, Riau Archipelago. Ten plots have been setup which distributed in several forest type areas. Fresh leaf was collected from some dominant tree within the plots, whereas fallen leaves collected from litter traps.Nutrient content especially for N, P, K and Ca analyzed from all combined species of both fresh and fallen leaves.Results of chemical analyses showed that all fallen leaves mineral element concentration, except for Ca,were lower than that in fresh leaf. Presentage of retranslocation of both nitrogen and phosphorus tended to be similar to some earlier studies in several tropical forests. Nitrogen and phosphorus were suspected to be limiting factors of forest growth in this area