scholarly journals VERTICAL SEGREGATION IN PRISTIMANTIS SPECIES FROM A BAMBOO FOREST IN SOUTHEAST OF AMAZONIA, BRAZIL

2019 ◽  
Vol 27 (1) ◽  
pp. 47-54
Author(s):  
Jhon Jairo LÓPEZ-ROJAS

In this work, the vertical stratification in Pristimantis species was studied in a remanescent forest dominated by bamboo in the southwest region of the Amazon. The field work was carried out between December 2012 and May 2013. The differences in height of the perch were analyzed interspecifically, and intraspecific in relation to the structure of the vegetation. A total of four species were recorded, Pristimantis fenestratus being the most abundant and occurring in all sampling units. There was significant interspecific difference in perch height, as well as between adults and juveniles. For P. fenestratus, there was no differentiation of segregation between sampling units. The structure of the vegetation did not explain the preference of heights; however, leaf litter depth influenced its vertical stratification. More data and occurrences are needed in all sampling units to infer better explanations.

2013 ◽  
Vol 47 (31-32) ◽  
pp. 2115-2124 ◽  
Author(s):  
Jane C.F. Oliveira ◽  
Edicarlos Pralon ◽  
Lívia Coco ◽  
Renata V. Pagotto ◽  
Carlos Frederico Duarte Rocha

2004 ◽  
Vol 20 (4) ◽  
pp. 429-438 ◽  
Author(s):  
Krista Farris-Lopez ◽  
Julie S. Denslow ◽  
Barry Moser ◽  
Heather Passmore

Plants often modify microsite conditions important for seedling establishment. In tropical moist forest, advance regeneration in the form of shade-suppressed seedlings is a major component of regrowth in new gaps. Tree seedlings may be filtered by the composition and structure of the forest understorey. In a lowland forest in Central Panama, we examined light availability, litter accumulation and the seedling community (abundance, diversity and composition) under and away from the canopies of a common subcanopy, clonal palm, Oenocarpus mapora, and tested whether seedling abundance varies as a function of changes in understorey light conditions and leaf litter depth. We found evidence that leaf litter was five times deeper and light availability 27% lower under O. mapora canopy than where it was absent. The probability of finding a seedling in plots under O. mapora canopies was 33% lower than in plots without the palm. Plots under O. mapora canopies also had 49% fewer species of seedlings and those seedlings came from significantly larger seeds than seedlings in plots not under the palm. Overall, seedling density was positively correlated with light availability and negatively correlated with leaf litter depth. A transplant experiment confirmed that for at least one large-seeded species of dicot, seedlings are negatively affected by the reduction in light availability and increase in leaf litter. Under O. mapora, seedlings of Gustavia superba (Lecythidaceae) had lower survivorship and biomass accumulation than away from the palm. Thus, site conditions produced by large, clonal, multi-layered palms such as O. mapora may reduce establishment of small-seeded and shade-intolerant species, potentially affecting species composition in the understorey seedling pool.


2013 ◽  
Vol 16 (2) ◽  
pp. 381-392 ◽  
Author(s):  
Hazelina H. T. Yeo ◽  
Kwek Yan Chong ◽  
Alex T. K. Yee ◽  
Xingli Giam ◽  
Richard T. Corlett ◽  
...  

2013 ◽  
Vol 726-731 ◽  
pp. 4222-4225 ◽  
Author(s):  
Yi Lin Tang ◽  
Ben Zhi Zhou ◽  
Xiao Gai Ge ◽  
Xiao Ming Wang ◽  
Qian Li

To provide an important basic knowledge for the biogeochemical cycle of bamboo forest ecosystem, particularly the cycling of global carbon, we studied decomposition dynamics of leaf-litter with different mass accumulation in moso bamboo forest. Our study area located in Miaoshanwu nature reserve, Fuyang, Zhejiang province. Based on the survey, we concluded that: (1) the sequence of remaining mass of leaf-litter with different mass accumulation after 240 days' decomposition from the most to the least was in the following order: 30g (58.53%) > 60g (51.92%) > 90g (48.48%), implying that leaf-litter with more mass accumulation decomposed faster in the unit area. (2)The more accumulated leaf-litter lead to more TOC loss in leaf-litter which will not helpful for TOC increase on surface soil carbon pools. This implying that the faster leaf-litter decomposed, the less TOC increased on surface soil carbon pools in 240 day s' observation. (3)The concentration of N, P, K and Ca showed the similar tendency with initially increasing but decreasing gradually in the following stage and then increasing again in the next stage. And concentration of Mg, Fe, Cu and Zn increased gradually in the period of 0-240 days.


1966 ◽  
Vol 21 (3) ◽  
pp. 245-245
Author(s):  
Daniel Gavales
Keyword(s):  

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