Leaf Decomposition Rates in Costa Rican Lowland Tropical Rainforest Streams

Biotropica ◽  
1980 ◽  
Vol 12 (4) ◽  
pp. 264 ◽  
Author(s):  
Jean Stout
Keyword(s):  
Tropical Rainforest ◽  
Costa Rican ◽  
Leaf Decomposition ◽  
Decomposition Rates

scholarly journals Differences in the decomposition of green and senescent leaves in streams of Reserva Florestal Adolpho Ducke (Amazonas, Brazil)

2018 ◽  
Vol 12 (01) ◽  
pp. 1-10
Author(s):  
Bianca Maíra de Paiva Ottoni-Boldrini
Keyword(s):  
Aquatic Invertebrates ◽  
Leaf Decomposition ◽  
Chemical Characteristics ◽  
Decomposition Rates ◽  
Leaf Type ◽  
Green Leaves ◽  
The Difference ◽  
Physical And Chemical ◽  
Paired T Test ◽  
Over Time

Leaves are considered the main energetic resource supply among all the allochthonous organic material available for the small shaded streams. However, their processing is limited by the physical and chemical characteristics of the leaves. Therefore, this research aimed to: i) evaluate the difference in decomposition coefficients between green and senescent leaves; ii) compare richness and density of aquatic invertebrates colonizing decomposing green and senescent leaves.  Between November 2012 and January 2013, 12 leaf packages (6 senescent and 6 green) of 14 plant species were installed in 3 streams of the Reserva Florestal Adolpho Ducke (Manaus/AM - Brazil). After 15, 30 and 60 days the submerged packages were removed. The collected material was taken to the laboratory for analyzes of: aquatic invertebrates and leaves' mass remnants. Paired t-test was performed to verify if the decomposition coefficients (k) differed. ANCOVAs were performed to compare: the remaining mass (%), richness and density of aquatic invertebrates between leaf type over time. The green leaves presented higher leaf decomposition rates than in senescent ones. The leaf type influenced the average invertebrates densities. Therefore, green leaves were more susceptible to the colonization of aquatic invertebrates associated with the leaf decomposition process in small Amazonian streams. 

Leaf Decomposition by Fungi in a Tropical Rainforest Stream

Biotropica ◽  
1976 ◽  
Vol 8 (3) ◽  
pp. 166 ◽  
Author(s):  
David E. Padgett
Keyword(s):  
Tropical Rainforest ◽  
Leaf Decomposition

scholarly journals Seasonality of litterfall and leaf decomposition in a cerrado site

2008 ◽  
Vol 68 (3) ◽  
pp. 459-465 ◽  
Author(s):  
MW. Valenti ◽  
MV. Cianciaruso ◽  
MA. Batalha
Keyword(s):  
Decomposition Rate ◽  
Woody Plant ◽  
Seasonal Pattern ◽  
Soil Surface ◽  
Plant Litter ◽  
Leaf Decomposition ◽  
The Other ◽  
Decomposition Rates ◽  
Litter Bags ◽  
Leaf Litterfall

We investigated annual litterfall and leaf decomposition rate in a cerrado site. We collected woody plant litter monthly from April 2001 to March 2002 and from July 2003 to June 2004. We placed systematically 13 litter traps (0.5 x 0.5 m) in a line, 10 m one from the other. We sorted litter into 'leaves', 'stems', 'reproductive structures', and 'miscellanea' fractions, oven-dried them at 80 °C until constant mass and weighed the dry material. To assess leaf decomposition rate, we packed leaves recently shed by plants in litter bags. We placed seven sets of nine litter bags in a line, 10 m one from the other, on the soil surface and collected nine bags each time after 1, 2, 3, 4, 6, 9, and 12 months. Total and leaf litter productions showed a seasonal pattern. Leaf litterfall was the phenological attribute that showed the strongest response to seasonality and drought. Decomposition was slower in the cerrado that we studied compared to a more closed cerrado physiognomy, reflecting their structural and environmental differences. Thus, decomposition rates seem to increase from open to closed cerrado physiognomies, probably related to an increase of humidity and nutrients in the soil.

Relative effect of litter quality, forest type and their interaction on leaf decomposition in south-east Brazilian forests

2008 ◽  
Vol 24 (2) ◽  
pp. 149-156 ◽  
Author(s):  
Camila de Toledo Castanho ◽  
Alexandre Adalardo de Oliveira
Keyword(s):  
Litter Quality ◽  
Deciduous Forest ◽  
Forest Type ◽  
Quality Parameters ◽  
Relative Effect ◽  
Leaf Decomposition ◽  
Transplant Experiment ◽  
Native Forest ◽  
Decomposition Rates ◽  
Copaifera Langsdorffii

Abstract:Decomposition was studied in a reciprocal litter transplant experiment to examine the effects of forest type, litter quality and their interaction on leaf decomposition in four tropical forests in south-east Brazil. Litterbags were used to measure decomposition of leaves of one tree species from each forest type:Calophyllum brasiliensefrom restinga forest;Guapira oppositafrom Atlantic forest;Esenbeckia leiocarpafrom semi-deciduous forest; andCopaifera langsdorffiifrom cerradão. Decomposition rates in rain forests (Atlantic and restinga) were twice as fast as those in seasonal forests (semi-deciduous and cerradão), suggesting that intensity and distribution of precipitation are important predictors of decomposition rates at regional scales. Decomposition rates varied by species, in the following order:E. leiocarpa>C. langsdorffii>G. opposita>C. brasiliense. However, there was no correlation between decomposition rates and chemical litter quality parameters: C:N, C:P, lignin concentration and lignin:N. The interaction between forest type and litter quality was positive mainly becauseC. langsdorffiidecomposed faster than expected in its native forest. This is a potential indication of a decomposer's adaptation to specific substrates in a tropical forest. These findings suggest that besides climate, interactions between decomposers and plants might play an essential role in decomposition processes and it must be better understood.

scholarly journals It is not just about birds: what do acoustic indices reveal about a Costa Rican tropical rainforest?

2021 ◽  
Vol 7 (1) ◽  
pp. 431-442
Author(s):  
Mónica Retamosa Izaguirre ◽  
Jimy Barrantes-Madrigal ◽  
David Segura Sequeira ◽  
Manuel Spínola-Parallada ◽  
Oscar Ramírez-Alán
Keyword(s):  
Tropical Rainforest ◽  
Costa Rican

Sandfly stratification on tree buttresses in a Costa Rican tropical rainforest

1994 ◽  
Vol 10 (1) ◽  
pp. 87-101 ◽  
Author(s):  
Jane Memmott ◽  
Stephen L. Sutton
Keyword(s):  
Tropical Rainforest ◽  
Ground Level ◽  
Costa Rican ◽  
Vertical Stratification ◽  
Experimental Conditions ◽  
Resting Sites ◽  
Phlebotomine Sandflies

ABSTRACTIn humid forests tree buttresses and tree trunks are used as diurnal resting sites by phlebotomine sandflies (Diptera: Psychodidae). When several species are present on the same buttress, the sandfly species are spatially segregated resulting in a pattern of vertical stratification on the buttress within 100 cm of ground level. A change in the distribution of one species induces a change in the distribution of an adjacent species. This is demonstrated under both natural and experimental conditions. Observations of sandflies at dawn and dusk have revealed that the buttress is used as a swarming site; this behaviour provides our favoured explanation for the patterns of vertical stratification on tree buttresses.

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