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Revista Ecologia e Nutrição Florestal - ENFLO
Number of Followers: 1

This is an Open Access Journal

Open Access journal
ISSN (Online) 2316-980X
Published by Universidade Federal de Santa Maria

[1 journal]

Seedling bank and ecological succession in a fragment of ciliary forest in
lower São Francisco
- Authors: Juliana Maria Moreira Duarte, Robério Anastácio Ferreira, Janisson Batista de Jesus, Dráuzio Correia Gama, Paula Maria Guimarães Marroquim, Ednei Santos de Almeida
  Abstract: The importance of evaluation of the seedling bank is to obtain the gathering of information on the natural regeneration of ecosystems. The objective of the study was to evaluate the seedling bank, identifying and analyzing the participation of the species involved in the natural succession process in a riparian forest fragment in the Sambambira Settlement, Santana do São Francisco, Sergipe State, Brazil. In three distinct environments (valley, slope and plateau background) were distributed, 25 plots with dimensions of 20 m x 20 m, in which they were installed small plots of 1 m². All individuals found with a minimum of 10 cm to a maximum of 100 cm high in the smalls plots were identified, quantified and measured. The phytosociological parameters and Shannon-Weaver (H') and Pielou (J') diversity rates were analyzed. Ecological groups were identified, as well as the effect of environments on the seedling bank by analysis of variance. 1,618 individuals were sampled, being found 117 morphospecies belonging to 24 families. The average monthly density was 16.18 seedlings m-². Rellia sp. and Pavonia cancellata were the species most abundant. The fragment presented high diversity of the regenerating stratum in initial process of secondary succession, indicating self-regenerating vegetation.
  PubDate: 2022-10-21
  DOI: 10.5902/2316980X70578
  Issue No: Vol. 10 (2022)
Characterization of edaphic arthropods in two areas with different
vegetation cover in the central region of Rio Grande do Sul
- Authors: Jocimar Caiafa Milagre, Grasiele Dick, Lucas José Mendes, Thaynara Diuliane Carvalho Paz, Mauricio Pegoraro Stangarlin, João Antônio Rodrigues Santos, Mauro Valdir Schumacher
  Abstract: Edaphic arthropods are organisms of great ecological importance and their dynamics in leaf litter and soil can be influenced by the type of vegetation cover. We aimed to characterize and compare abundance, richness and diversity and uniformity indices of edaphic arthropods in an area occupied by bamboo (BM) and a reforested area (RF), located in the central region of Rio Grande do Sul state, south Brazil. The hypothesis of this study is that there will be greater abundance, richness, diversity and uniformity of organisms in the RF area. The collection of soil fauna was performed by sampling the arthropods present at the soil-leaf litter interface using Provid collectors at four points in each study area. There were high levels of abundance and richness of arthropods in both areas of the study, and the orders Collembola, Coleoptera, Hymenoptera and Diptera were the most representative. The predicted hypothesis was refuted, since the RF area had a smaller number of individuals and the same richness as the BM area. BM area showed greater abundance of individuals of the order Diptera when compared to the RF area, and for the other orders there were no significant differences. Additional studies considering the physical and chemical properties of the soil and the litter composition may help to better understand the relationship between edaphic arthropods and vegetation cover in these areas, besides the bioindicator role of these organisms.
  PubDate: 2022-10-09
  DOI: 10.5902/2316980X69707
  Issue No: Vol. 10 (2022)
Bovine and equine manure doses in the initial growth of white ipe
seedlings
- Authors: Cristiane Ramos Vieira, Rayza Samara de Assis Carneiro, Rosangela Araujo Botelho, Patrícia Paz da Costa
  Abstract: The application of organic residues can be a good alternative for the seedlings production, provided that, in an adequate amount for the species to be propagated. Therefore, experiments were developed to evaluate the initial growth of white ipe seedlings (Tabebuia rose-alba (Ridl.) Sandwith in different doses of bovine and equine manure. The experiments were carried out in a completely randomized design with five doses (treatments) and five repetitions for each type of manure, being: T0 - without addition of manure; T1 - 10 Mg ha-1; T2 - 20 Mg ha-1; T3 - 30 Mg ha-1; T4 - 40 Mg ha-1. At the end of 90 days, the morphological characteristics of the white ipe seedlings were evaluated. The addition of bovine and equine manure to the soil improved the conditions for the growth of white ipe seedlings, and the dose of 40 Mg ha-1 was the most favorable for the species, for both manure types.
  PubDate: 2022-08-05
  DOI: 10.5902/2316980X70653
  Issue No: Vol. 10 (2022)
Leaf litterfall, decomposition and nutrients release in a Seasonal
Semideciduous Forest in Southern Brazil
- Authors: Monique Pimentel Lagemann, Hamilton Luiz Munari Vogel, Frederico Costa Beber Vieira, Leandro Homrich Lorentz, Mauro Valdir Schumacher, Grasiele Dick
  Abstract: Biogeochemical cycling study of ecosystems and their functioning are fundamental for planning conservation practices and management of forest remnants in Brazil. The objective of the study was to characterize the leaf litterfall production rate and the nutrients release via decomposition in a fragment of Seasonal Semideciduous Forest, in Southern Brazil, in advanced stage of regeneration. For two years, evaluations of litterfall and leaf litter decomposition (using the mass loss method with litterbags) were performed monthly, as well as their nutrient content analysis. Annual input of leaf litterfall was 4,532.7 kg ha-1 of dry matter, which promoted, for the two-year period, a supply of 195.5, 9.2 and 55.3 kg ha-1 of N, P and K, respectively. The litter nutrients use efficiency followed the decreasing order P > K > N. The annual decomposition constant for leaf litter was 1.16, reaching a half-life at 215 days, making 84.4% N, 72.7% P and 92.9% K available at the decomposition end of two years. In the two years of collection, the largest deposition rate of litter occurred in the spring, with the highest peak in October, indicating a seasonal deposition behavior. The forest fragment presents high production of leaf litter (66% leaves) and input of N. The rapid decomposition of leaf litter contributes to the release of nutrients over time, N and K initially, and P in the long run. P is limited due to the high efficiency of its use.
  PubDate: 2022-04-07
  DOI: 10.5902/2316980X67763
  Issue No: Vol. 10 (2022)
Nutrients in litter of four eucalyptus clones under an Integrated
Crop-Livestock-Forest System (CLFS)
- Authors: Amanda Prudente Velozo, Abílio Rodrigues Pacheco, Francine Neves Calil, Carlos de Melo Silva-Neto
  Abstract: The objective of this study was to evaluate the biomass production and nutrient stock in the accumulated litter of a plantation with four eucalyptus clones (AEC-2034 ((Eucalyptus camaldulensis x E. grandis) x E. urophylla)), AEC-2111 (E. urophylla x (E. camaldulensis x E. grandis)), AEC-007 (E. toreliana x E. citriodora) and AEC-0043 (E. citriodora x E. toreliana)) at four and a half years under an integrated crop-livestock-forest system (CLFS) in Inaciolândia, Goiás, Brazil. A template of an area of 0.0625 m² was used for the litter collection (leaves, branches, bark and miscellaneous). Thus, 20 litter samples were collected at random from each clone, totaling 80 samples. All of the material was processed in the laboratory through drying, weighing and grinding to determine biomass and analyze the nutritional content. The results obtained were an accumulation in the average total above ground biomass production estimated at 6.07 Mg ha-1 for the AEC-2034 clone, 5.20 Mg ha-1 for the AEC-2111 clone, 3.41 Mg ha-1 1 for the AEC-007 clone and 3.23 Mg ha-1 for the AEC-0043 clone. The leaf component showed the highest total accumulation in all clones. Nitrogen (N) was the element which presented the highest accumulation in the litter for all clones. The greatest accumulation of litter biomass occurred for the AEC-2034 clone, and the most representative component was leaves. The AEC-2034 clone showed the highest nutrient stock in the litter and the AEC-0043 clone presented the lowest stock. Nitrogen (N) was the macronutrient with the highest accumulation in the evaluated components, and iron (Fe) was the micronutrient. Based on litter and nutrient return, the most suitable clone in the CLFS system in this region is the AEC-2034 clone.
  PubDate: 2022-02-07
  DOI: 10.5902/2316980X68328
  Issue No: Vol. 10 (2022)

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