scholarly journals Estrutura e funcionamento de um ecossistema florestal amazônico de terra firme junto à Reserva Florestal Walter Egler, município de Rio Preto da Eva, Amazonas, Brasil

2000 ◽  
Vol 29 ◽  
Author(s):  
WILLIAM A. RODRIGUES ◽  
†HANS KLINGE ◽  
ERNEST J. FITTKAU
Keyword(s):  
Forest Ecosystem ◽  
Rain Forest ◽  
East Side ◽  
Terra Firme ◽  
Forest Reserve ◽  
Lowland Rain Forest

Para se determinar a estrutura e fitomassa de um ecossistema florestal amazônico de terra firme, mapeou-se e colheu-se a vegetação de uma área demarcada de 0,2 ha localizada nas adjacências do limite leste da Reserva Florestal W. Egler (km 64 da estrada Manaus- Itacoatiara (AM-1), Município de Rio Preto da Eva, Amazonas, Brasil. Os resultados obtidos são apresentados e discutidos em comparação com os dados da literatura. ABSTRACT For the determination of structure and phytomass of a Central Amazonian lowland rain forest ecosystem, its vegetation was mapped and harvested on 0.2-ha, very near the Forest Reserve W. Egler, situated at the east side of the Manaus-Itacoatiara road (AM-1), km 64, Municipality of Rio Preto da Eva, Amazonas, Brazil. The main results are presented and discussed in comparison to data from the literature. RÉSUMÉ Pour déterminer la structure et la phytomasse de la forêt amazonienne dense humide de terre ferme, très proche de la limite de la Réserve Forestière W. Egler, localisée sur la route AM-1 (Manaus à Itacoatiara), km 64, Etat d’Amazonas, Brésil, la végétation de 0,2 ha a été cataloguée et récoltée entiérement. Les résultats sont présentés et discutés par repport aux données disponibles de la littérature.

scholarly journals THE LICHENS DIVERSITY IN TRIANGULATION OF ALAS PURWO NATIONAL PARK, EAST JAVA

2015 ◽  
Vol 2 (1) ◽  
pp. 265
Author(s):  
Iin Supartinah Noer ◽  
Joko Kusmoro ◽  
Erwan Yudiar Darussalam ◽  
Dwi Nur Laksono ◽  
Aan Abdul Hakim
Keyword(s):  
Forest Ecosystem ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
National Park ◽  
Cloud Forest ◽  
Usnic Acid ◽  
Lowland Rain Forest ◽  
Tropical Lowland ◽  
Green Algal ◽  
Lowland Tropical Rain Forest

<p>The lichen flora of tropical areas is still much underworked Java in general and Alas Purwo in East Java for specially is no exception. Alas Purwo National Park is representative of a typical lowland tropical rain forest ecosystem in Java. . It is famous with peculiar and endemic species of plant include sawo kecik (Manilkara kauki) and manggong bamboo (Gigantochloa manggong). , beside among the other plants also ketapang (Terminalia cattapa), nyamplung (Calophyllum inophyllum), kepuh (Sterculia foetida), and keben (Barringtonia asiatica). Moreover, in lowland tropical rain forest ecosystem have reported the lichens species diversity is very high and may include over 200 species in 1 ha. There is no reported have found concerning the lichens richness in Alas Purwo. Recently preliminary study of Lichens diversity have been done at triangulation Zone Alas Purwo National Park , East Java. The lichens of the study area have not been treated comprehensively. We explored the lichenological characteristics of putative”tropical lowland cloud forest” (LCF) in a lowland area (0–20ma.s.l.) near Triangulation using macrolichens (cortocoulous species) as indicator taxa We analyzed lichen diversity on 20 trees in two 0,25 ha plots. In tropical lowland forests, corticolous green algal lichens are abundant and highly diverse. This may be related to adaptation to prevailing microenvironmental conditions including, for example, high precipitation and low light intensities. In the understory of a tropical lowland rain forest in Alas Purwo , we studied the morphology and anatomy of corticolous lichens and microcristal test. We found that from Tetrasigma sp , Serbella otodans, Hemandia feltata Baringtonia aciatika Pandanaceae Manilcara cauci Swetinia mahagoni trees there are 30 species of lichens, dominated by Dyorigma sp Graphis and Glyphis from familia of Graphidaceae and Dirinaria Physcia Pyxine Ramalina from familia of Parmeliaceae. The thallus calour was variety from Green-grey, Green-bllue, green, light green, grey, brown, dark green to orange. They have vegetative as wel as generative reproduction such as isidia, soralia, soredia, chypellae, histerothecia, perithecia,and apothecia. The lichenic acids contain such as gyrophoric acid, barbatic acid, usnic acid, atranorin, acid, divaricatic acid and lecanoric acid, </p><p><strong>Keywords</strong>: Alas Purwo, lichens and lichenic acid.</p>

Recovery of termite (Isoptera) assemblage structure from shifting cultivation in Barito Ulu, Kalimantan, Indonesia

2006 ◽  
Vol 22 (5) ◽  
pp. 605-608 ◽  
Author(s):  
F. J. Gathorne-Hardy ◽  
Syaukani ◽  
D. J. G. Inward
Keyword(s):  
East Asia ◽  
Forest Ecosystem ◽  
Rain Forest ◽  
Shifting Cultivation ◽  
Assemblage Structure ◽  
Biodiversity Hotspot ◽  
South East Asia ◽  
Malay Peninsula ◽  
Lowland Rain Forest

The lowland rain-forest ecosystem in Sundaland (Borneo, Sumatra, Java, the Malay Peninsula south of 10°N, and associated islands) has been recognized as a biodiversity hotspot (Myers et al. 2000). However, it is suffering from huge amounts of disturbance, and it is predicted that South-East Asia will lose three-quarters of its rain forest by the turn of next century (Sodhi et al. 2004).

Calcium Budgets for Catchments as Interpreted by Strontium Isotopes

1989 ◽  
Vol 20 (2) ◽  
pp. 85-96 ◽  
Author(s):  
Gunnar Jacks ◽  
Göran Åberg ◽  
P. Joseph Hamilton
Keyword(s):  
Steady State ◽  
Forest Ecosystem ◽  
Coniferous Forest ◽  
Strontium Isotopes ◽  
Runoff Water ◽  
Weathering Rate ◽  
Weathering Rates ◽  
Exchangeable Calcium

Strontium isotopes in precipitation, soil and runoff water can be used to establish a ratio of wet plus dry deposited Sr to Sr released by weathering. This ratio is especially enhanced in areas with old acid Proterozoic rocks (0.6-2.5 Ga) and Archean rocks (&gt;2.5 Ga). Since Sr and Ca behave in an analogous way in the coniferous forest ecosystem the results for Sr can be used for the determination of Ca. If the deposition of calcium can be calculated reasonably accurately the weathering rate can also be estimated. Five catchments have been investigated using this approach. Three of them seem to be close to a steady state, wherein the losses and gains of calcium to the system are equal. In the two southern-most catchments there seems to be an ongoing loss of exchangeable calcium. The loss by runoff occurs with sulphate being the dominant anion. Weathering rates of 1.5 to 4.8 kg Ca/ha year have been estimated.

Ants accelerate litter decomposition in a Costa Rican lowland tropical rain forest

2012 ◽  
Vol 28 (5) ◽  
pp. 437-443 ◽  
Author(s):  
Terrence P. McGlynn ◽  
Evan K. Poirson
Keyword(s):  
Mass Loss ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Rain Forest ◽  
Costa Rican ◽  
Tropical Rain Forests ◽  
Rain Forests ◽  
Food Web Structure ◽  
Litter Bags ◽  
Lowland Rain Forest

Abstract:The decomposition of leaf litter is governed, in part, by litter invertebrates. In tropical rain forests, ants are dominant predators in the leaf litter and may alter litter decomposition through the action of a top-down control of food web structure. The role of ants in litter decomposition was investigated in a Costa Rican lowland rain forest with two experiments. In a mesocosm experiment, we manipulated ant presence in 50 ambient leaf-litter mesocosms. In a litterbag gradient experiment, Cecropia obtusifolia litter was used to measure decomposition rate constants across gradients in nutrients, ant density and richness, with 27 separate litterbag treatments for total arthropod exclusion or partial arthropod exclusion. After 2 mo, mass loss in mesocosms containing ants was 30.9%, significantly greater than the 23.5% mass loss in mesocosms without ants. In the litter bags with all arthropods excluded, decomposition was best accounted by the carbon: phosphorus content of soil (r2 = 0.41). In litter bags permitting smaller arthropods but excluding ants, decomposition was best explained by the local biomass of ants in the vicinity of the litter bags (r2 = 0.50). Once the microarthropod prey of ants are permitted to enter litterbags, the biomass of ants near the litterbags overtakes soil chemistry as the regulator of decomposition. In concert, these results support a working hypothesis that litter-dwelling ants are responsible for accelerating litter decomposition in lowland tropical rain forests.

Yams and megapode mounds in the lowland rain forest of Papua New Guinea

Human Ecology ◽  
1990 ◽  
Vol 18 (2) ◽  
pp. 177-185 ◽  
Author(s):  
Peter D. Dwyer ◽  
Monica Minnegal
Keyword(s):  
Papua New Guinea ◽  
Rain Forest ◽  
New Guinea ◽  
Lowland Rain Forest

Seedling functional types in a lowland rain forest in Mexico

2001 ◽  
Vol 88 (10) ◽  
pp. 1801-1812 ◽  
Author(s):  
Guillermo Ibarra-Manríquez ◽  
Miguel Martínez Ramos ◽  
Ken Oyama
Keyword(s):  
Rain Forest ◽  
Lowland Rain Forest ◽  
Functional Types

Diversity and vertical distribution of epiphytic liverworts in lowland rain forest and lowland cloud forest of French Guiana

2013 ◽  
Vol 35 (4) ◽  
pp. 243-254 ◽  
Author(s):  
Christine Gehrig-Downie ◽  
André Obregon ◽  
Jörg Bendix ◽  
Robbert Gradstein
Keyword(s):  
Vertical Distribution ◽  
Rain Forest ◽  
French Guiana ◽  
Cloud Forest ◽  
Lowland Rain Forest

scholarly journals Changes in the floristic composition of a Terra Firme rain forest In Brazilian Amazonia over an eight-year period In response to logging

2002 ◽  
Vol 32 (2) ◽  
pp. 277-277 ◽  
Author(s):  
João Olegário Pereira de CARVALHO
Keyword(s):  
Rain Forest ◽  
Floristic Composition ◽  
National Forest ◽  
Terra Firme ◽  
Permanent Sample Plots ◽  
Brazilian Amazonia ◽  
Number Of Species

Changes in the floristic composition over an eight-year period in a logged area at the Tapajós National Forest in Brazilian Amazonia arc discussed. Two treatments of different intensities of logging were compared with an undisturbed (control) forest. Data were collected from permanent sample-plots. The effects of logging on floristic composition were stronger in the more heavily logged treatment. The number of species decreased immediately after logging, but started to increase before the fifth year after logging and was higher at the end of the study period than before logging. The more heavily logged plots responded more to disturbances, as judged by the increase in the number of species during the period after logging. This forest appears to recover its initial floristic composition after disturbance without intervention.

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