scholarly journals Estimasi Cadangan Karbon Pada Tumbuhan Bawah dan Serasah Di Hutan Pendidikan dan Penelitian Fakultas Kehutanan Universitas Mulawarman Samarinda

2021 ◽  
Vol 5 (2) ◽  
pp. 55
Author(s):  
Wahjuni Hartati ◽  
Ali Suhardiman ◽  
Triyono Sudarmadji ◽  
Syahrinudin Syahrinudin ◽  
Eko Adi Sulistiyo
Keyword(s):  
Leaf Litter ◽  
Woody Plants ◽  
Secondary Forest ◽  
Forest Coverage ◽  
Steep Slopes ◽  
Lower Slope ◽  
Made In

Three slopes of 100 m long are defined in young secondary forest with gentle and slightly steep slopes. In each part of the slope, we built 1 (one) PUP of 20m x 20m which is consisted of 3 (three) Sub PUPs of 10m x 10m to represent the density of sparse, medium and dense understorey and 1m x 1m of sub-PUPs for litter harvesting. A total of 18 (eighteen) PUPs, each 54 (fifty four) Sub PUPs and Sub sub PUPs were made in this study. The HPFU area is dominated by young secondary forest coverage with gentle and slightly steep slopes. The C reserves of herbaceous understorey is greater than that of woody plants. C reserves of all components studied in the gently sloping area are greater than the steep ones. The largest C reserves is found in leaf litter for all slope positions except for a slightly steep lower slope, the largest C reserves is found in finer litter. The total C reserves of understorey and young secondary forest organic litter in HPFU 933.4 tonnes and 95.9% are stored in litter.

Decomposition of Leaf Litter from Native and Nonnative Woody Plants in Terrestrial and Aquatic Systems in the Eastern and Upper Midwestern U.S.A.

2021 ◽  
Vol 186 (1) ◽  
Author(s):  
Daniel J. Hornbach ◽  
Kathleen L. Shea ◽  
Jerald J. Dosch ◽  
Carolyn L. Thomas ◽  
Tracy B. Gartner ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Woody Plants ◽  
Aquatic Systems

scholarly journals Determination of trace elements in the plants of Mt. Bozdag, Izmir, Turkey

2010 ◽  
Vol 62 (3) ◽  
pp. 731-738 ◽  
Author(s):  
D. Yildiz ◽  
I. Kula ◽  
G. Ay ◽  
S. Baslar ◽  
Y. Dogan
Keyword(s):  
Trace Elements ◽  
Woody Plants ◽  
Statistical Significance ◽  
Absorption Spectrometry ◽  
Dry Weight ◽  
Current Level ◽  
The Mean ◽  
Herbaceous And Woody Plants ◽  
Made In

The aim of this study was to determine the current level of atmospheric heavy metal content on the Bozdag Mountain of the Aegean Region, Turkey. Twenty nine different plants were selected to study their potential as biomonitors of trace elements such as Ni, Zn, Fe, Pb, Mn and Cd (?g g-1, dry weight). The samples were collected from two different altitudes of Mt. Bozdag. The concentrations of trace elements were determined by atomic absorption spectrometry. The mean concentrations determined at 1000 m altitude ranged from 0.025 to 1.609, 0.232 to 0.731, 0.578 to 5.983, 0.287 to 0.565 and 0.176 to 2.659 (?g g-1, dry weight), for Ni, Zn, Fe, Pb and Mn, respectively. At the altitude of 1600 m, the values ranged from 0.023 to 0.939, 0.258 to 1.254, 0.839 to 5.176, 0.301 to 1.341 and 0.405 to 3.351 (?g g-1, dry weight) for Ni, Zn, Fe, Pb and Mn, respectively. No Cd was detected at either altitude. Statistical significance was determined by the independent sample t-test and comparisons were made in order to determine if there were any differences between the averages of herbaceous and woody plants. .

Secondary forest structure and biomass following short and extended land-use in central and southern Amazonia

2000 ◽  
Vol 16 (5) ◽  
pp. 689-708 ◽  
Author(s):  
Marc K. Steininger
Keyword(s):  
Land Use ◽  
Secondary Forest ◽  
Forest Biomass ◽  
Biomass Accumulation ◽  
Stand Age ◽  
Total Biomass ◽  
Forest Regrowth ◽  
Age Sequence ◽  
Southern Amazonia ◽  
Made In

A study was conducted on the effect of extended land-use on secondary forest biomass accumulation in the Amazon. Structural measurements were made in a series of secondary forest stands, from 4–30 y old, in Brazil and Bolivia. Half of the stands were forest regrowth following clearance and only 1 y of cultivation; the other half were regrowth following 4 y or more of continuous pasture in Brazil and three or more rotations of medium-fallow agriculture in Bolivia. Above-ground live biomass was estimated using published allometric equations. Total biomass ranged from 17 to 207 Mg ha−1. Biomass of pioneer trees was poorly related to stand age, while that of later-successional trees increased linearly with age. Total biomass accumulation in Bolivia averaged 5.4 Mg ha−1 y−1 over the entire age sequence. Biomass accumulation for regrowth following short-term use was not greater than that for regrowth following medium-fallow agriculture. In Brazil, biomass accumulation averaged 9.1 Mg ha−1 y−1 over the first 12 y of regrowth and 5.9 Mg ha−1 y−1 over the entire age sequence. Biomass accumulation was significantly slower, around 5.0 Mg ha−1 y−1, for regrowth following continuous pasture than for regrowth following 1 y of cultivation.

Phenological changes in a Sumatran rain forest

1986 ◽  
Vol 2 (4) ◽  
pp. 327-347 ◽  
Author(s):  
C. P. Van Schaik
Keyword(s):  
Leaf Litter ◽  
Rain Forest ◽  
Seasonal Pattern ◽  
Dry Season ◽  
Wet Season ◽  
Phenological Changes ◽  
Young Leaves ◽  
Fig Trees ◽  
One Year ◽  
Made In

ABSTRACTPhenological observations were made in a Sumatran rain forest during three years (1980–1982). Phenological changes followed a consistent seasonal pattern. The abundance of young leaves and the fall of leaf litter peaked between December and February (first dry season); flowers were most abundant between January and April (first dry and first wet sea son), and ripe fruits in July-August (the second dry season). The fruit of strangling fig trees showed peaks in April and October, both wet season months. Within the study area there was variation in both the phase and the amplitude of the phenological cycles. One year, 1981, displayed mast flowering and fruiting. The observations indicate that the conditions for production were better during the mast year, a finding that facilitates our understanding of the evolution of mast fruiting.

scholarly journals Competence of Litter Ants for Rapid Biodiversity Assessments

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
T. H. Saumya E. Silva ◽  
Nuwan B. Karunarathna ◽  
W. A. Inoka P. Karunaratne
Keyword(s):  
Leaf Litter ◽  
Large Scale ◽  
Secondary Forest ◽  
Vegetation Type ◽  
Species Assemblages ◽  
Vegetation Types ◽  
Forest Reserve ◽  
Arthropod Diversity ◽  
Line Transects

Rapid Biodiversity Assessment approaches associated with focusing taxa have overcome many of the problems related to large scale surveys. This study examined the suitability of litter ants as a focusing taxon by checking whether diversity and species assemblages of litter ants reflect the overall picture of arthropod diversity and assemblages in leaf litter in two vegetation types: secondary forest and pine plantation in Upper Hanthana forest reserve, Sri Lanka. In each vegetation type, arthropods were sampled using three sampling methods (Winkler extraction, hand collection, and pitfall traps) along three 100 m line transects. From the two sites, 1887 litter ants (34 species) and 3488 litter arthropods (52 species) were collected. Species assemblages composition of both ants and other arthropods differed significantly between the two sites (ANOSIM, p=0.001) with both groups generating distinct clusters for the two sites (SIMPROF, p=0.001). But there was no significant correlation (p>0.05) between abundance and richness of litter ants and those of other arthropods in both vegetation types. The overall finding suggests that the litter ants do not reflect the holistic picture of arthropod diversity and assemblages in leaf litter, but the quality of the habitat for the survival of all litter arthropods.

scholarly journals Ecological stoichiometry of plant leaves, litter and soils in a secondary forest on China’s Loess Plateau

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10084
Author(s):  
Zongfei Wang ◽  
Fenli Zheng
Keyword(s):  
Leaf Litter ◽  
Loess Plateau ◽  
Ecological Stoichiometry ◽  
Secondary Forest ◽  
Vegetation Restoration ◽  
Forest Growth ◽  
P Element ◽  
Soil System ◽  
P Concentration ◽  
N Concentration

Ecological stoichiometry can reveal nutrient cycles in soil and plant ecosystems and their interactions. However, the ecological stoichiometry characteristics of leaf-litter-soil system of dominant grasses, shrubs and trees are still unclear as are their intrinsic relationship during vegetation restoration. This study selected three dominant plant types of grasses (Imperata cylindrica (I. cylindrica) and Artemisiasacrorum (A.sacrorum)), shrubs (Sophora viciifolia (S. viciifolia) and Hippophae rhamnoides (H. rhamnoides)) and trees (Quercus liaotungensis (Q. liaotungensis) and Betula platyphylla (B. platyphylla)) in secondary forest areas of the Chinese Loess Plateau to investigate ecological stoichiometric characteristics and their intrinsic relationships in leaf-litter-soil systems. The results indicated that N concentration and N:P ratios in leaf and litter were highest in shrubland; leaf P concentration in grassland was highest and litter in forestland had the highest P concentration. Soil C, N and P concentrations were highest in forestland (P < 0.05) and declined with soil depth. Based on the theory that leaf N:P ratio indicates nutritional limitation of plant growth, this study concluded that grass and shrub growth was limited by N and P element, respectively, and forest growth was limited by both of N and P elements. The relationships between the N concentration in soil, leaf and litter was not significant (P >0.5), but the soil P concentration was significantly correlated with litter P concentration (P < 0.05). These finding enhance understanding of nutrient limitations in different plant communities during vegetation restoration and provide insights for better management of vegetation restoration.

scholarly journals Demography of the land snail Tikoconus (Tikoconus) costarricanus (Stylommatophora: Euconulidae) in tropical low montane and premontane forests, Costa Rica

2019 ◽  
Vol 67 (6) ◽  
Author(s):  
Zaidett Barrientos
Keyword(s):  
Costa Rica ◽  
Natural History ◽  
Leaf Litter ◽  
Secondary Forest ◽  
Land Snail ◽  
Egg Laying ◽  
Land Snails ◽  
Tropical Species ◽  
Spearman Correlation ◽  
Mature Forest

Abstract. Introduction: Ecology and natural history of neotropical land snails is almost unknown. Objetive: In this paper I analyse the population dynamics of Tikoconus (Tikoconus) costarricanus Barrientos, in prep., an understory endemic euconulid. Methods: I compared T. costarricanus’ demography patterns in tropical montane forests in central Costa Rica in three habitats with different restoration techniques: a mature forest, a secondary forest and a Cuppressus lusitanica plantation. I collected data in three month periods during a year. I analysed population size in relation with habitat, sampling date, leaf litter humidity, depth and quantity; and specimen size in relation with habitat and sampling date. I also kept some specimens in terraria and described part of their natural history. Results: The species is more abundant in mature forest (Ø = 0.174 ind/m2). The number of specimens in each habitat was constant throughout the year (Kruskall-Wallis = 2.0118, p = 0.57, NS) and hatching occurs in the middle and last months of the rainy season (Kruskall-Wallis = 17.3061, p = 0.00061, **). Number of specimens is related with leaf litter humidity (Spearman correlation, r = 0.3524, n = 232, p = 0.000, **), amount (Spearman correlation, r = 0.3922, n = 232, p = 0.000, **) and depth (Spearman correlation, r = 0.2543, n = 232, p = 0.000, **). This relationship is explained by the high and stable humid environment provided by leaf litter. During the drier months some specimens migrate from the foliage to the leaf litter. Eggs (Ø = 1mm) are laid on moss or soil and the young spend the first 2 or 3 weeks of their life on moss. Egg masses are small (Ø = 4 eggs), and shells look bubbly. Egg development time (20 days) was longer than in other tropical species. Adult pigmentation appears around two months after hatch. In the only case observed egg laying began 5 months after hatching and the specimen lived 9 months. Conclusions: Although no conclusive, these data point to a fragile species susceptible to habitat and climate change. Restorations techniques should consider leaf litter features in order to protect endemic neotropical humid dependent diversity.

scholarly journals Dormant landslides distributed in upper course of Sun Kosi Watershed and landslides induced by Nepal Gorkha Earthquake 2015

2018 ◽  
Vol 55 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Hiroshi Yagi ◽  
Kazunari Hayashi ◽  
Daisuke Higaki ◽  
Ching-Ying Tsou ◽  
Go Sato
Keyword(s):  
Large Scale ◽  
Slope Angle ◽  
Area Ratio ◽  
Slope Gradient ◽  
Landslide Area ◽  
Gorkha Earthquake ◽  
Augen Gneiss ◽  
Steep Slopes ◽  
Lower Slope ◽  
Dip Slope

This study detected 897 dormant landslides of deep-seated type in the upper course of the Sun Kosi Watershed. It also shows geology and slope gradient that are prone to cause deep-seated landslides in the Great Himalaya and Midland zones. The dormant landslides are predominantly distributed in geological areas of the Augen Gneiss, Benighat Slate, Robang Phyllite and the Kuncha Phyllite, considering both landslide area ratio and site number. Landslides of deep-seated type are also found prone to develop on dip-slope. Occurrence of landslides usually increases over 20 degrees of slope angle for each geological type, though the number of landslides in the phyllite area increases below 20 degrees. It is very clear that landslides in phyllite area are prone to occur from relatively lower slope angles compared to those occurring in quartzite, gneiss and the Sermathang Formation. Nepal Gorkha Earthquake 2015 caused 1804 landslides in this study area. Most of the earthquake-induced landslides are of shallow types that occurred just below break of slope, showing a shoulder shaped profile along the deep gorge. They are predominantly distributed on steep slopes in the geological areas of slate, gneiss and dolomite. None of the dormant landslides of large scale was activated by the earthquake.

scholarly journals Legal Enforcement on Environmental Impact of Palm Oil Plantation of Merauke District

2018 ◽  
Vol 73 ◽  
pp. 02005
Author(s):  
Jane Marlyn Alputila ◽  
Rullof F. Y. Waas ◽  
Erni Dwita Silambi ◽  
Yuldiana Zesa Azis ◽  
Mulyadi Alrianto Tajuddin
Keyword(s):  
Palm Oil ◽  
Secondary Forest ◽  
Evergreen Forest ◽  
Primary Forest ◽  
Mangrove Forests ◽  
Swamp Forest ◽  
Oil Companies ◽  
Legal Enforcement ◽  
Forest Coverage ◽  
The Government

Merauke City is one of the cities in Papua which has 4.6 million hectares consisting of 3.1 million hectare for forest coverage and the rest is 1.5 non-forest coverage. Around 66% forest coverage consists of primary forest, high-density secondary forest, low-density secondary forest, primary swamp forest, secondary swamp forest, eucalyptus/acacia forest, primary mangrove forest, and secondary mangrove forests. Merauke City is one of the place which has a great potential to maintain and sustain ecological system with its vast territory and its evergreen forest which people keep its sustainability. However, the government and some companies expanding their business take a toll for the balance of the nature, since some of the forest areas are cut down and the industrial waste affects the ecosystem. Some territories in Merauke become heavily polluted from the wastes. One of the pollution cases is from six palm oil companies which has polluted some forests in Merauke, Papua. The companies responsible for the decreasing environmental condition are operating in Malind Bian such as PT Dongin Prabhawa ( Korindo Group), PT Bio Inti Agrindo (Korindo group), PT Central Cipta Murdaya (CCM), PT Agriprima Cipta Persada, PT Hardaya Sawit Papua and PT Berkat Cipta Abadi. The method is of this study is normative legal approach. The result of this study reveals that the government are advised to include the society and the locals to make a decision and to find a good solution for the environment which has been sustaining their life. This may resolve the problem between the palm oil company, the government, and the society to uphold a new law. The government should be strict to set rules in order to be beneficial not only for the companies, but also for the society, the government, and the environment in Merauke City. When the law has been issued, the companies indicated to be violating certain set of rules regarding environmental pollution and contamination, can be evaluated and revoked of their warrant to do business in Merauke. This will be a good solution to make sure the sustainability of the environment, forests, and the society depending on it.

scholarly journals Implementation of Silvopastoral Systems under Nutrient Cycling in Secondary Vegetation in the Amazon

2018 ◽  
Vol 10 (4) ◽  
pp. 124
Author(s):  
Perlon Maia dos Santos ◽  
Antonio Clementino dos Santos ◽  
Durval Nolasco das Neves Neto ◽  
Wallace Henrique de Oliveira ◽  
Luciano Fernandes Sousa ◽  
...  
Keyword(s):  
Nutrient Cycling ◽  
Leaf Litter ◽  
Secondary Forest ◽  
Integrated Systems ◽  
Native Forest ◽  
Panicum Maximum ◽  
Secondary Forests ◽  
Silvopastoral Systems ◽  
Decomposition Rates ◽  
Thinning Intensity

Silvopastoral systems can be implemented in idle secondary forests; however, they may affect nutrient cycling in these ecosystems. This farming practice using babassu palms (Attalea speciosa Mart.) and Mombasa grass (Panicum maximum Jacq.) has been little studied, and the nutrient cycling occurred during this practice is yet unknown. The goal of this paper was to detect the leaf litter accumulation, decomposition, and nutrient release occurring in silvopastoral systems in a babassu secondary forest, and compared the results with those of a native forest and of a pasture grown under full sunlight. The data relating to deposition, chemical composition, decomposition, and macronutrient release of leaf litter and pasture litter were evaluated by multivariate analyses. The results showed that forest thinning reduced leaf litter deposition and overall nutrient cycling but had no effect on decomposition rates. Conversely, the presence of grass in the understory promoted increased overall nutrient cycling rates. The cycling in integrated systems occurs more similar to that of forests than that of monocultures. The greater the thinning intensity the more similar the cycling will be relative to that occurring in pastures and in monocultures. The nutrients Ca, Mg, and N were the most affected by thinning. Moreover, the presence of grass in integrated systems provided an increased N and Mg cycling, whereas the thinning reduced Ca cycling. K showed the highest release and return ratio to the soil. Lastly, leaf litter from pasture areas showed higher contents of nutrients, decomposition rates, as well as an enhanced nutrient cycling capacity.

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