scholarly journals Nutritional Efficiency of Forest Species in Natural Regeneration of Tropical Forest in Brazil

2018 ◽  
Vol 7 (3) ◽  
pp. 81
Author(s):  
Roseane Silva ◽  
Ana Feliciano ◽  
Luiz Marangon ◽  
Maria Freire ◽  
Fernando Freire ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Native Species ◽  
Tropical Soils ◽  
Utilization Efficiency ◽  
Natural Fertility ◽  
Forest Fragment ◽  
Forest Species ◽  
The Difference ◽  
Ombrophilous Forest ◽  
Phytosociological Study

The knowledge of the nutritional aspects of native species, mainly in natural regeneration, may be important for understanding their establishment, particularly in areas with low nutrient availability soils, such as tropical soils. This study aimed to determine the biological utilization efficiency (BUE) of the nutrients N, P, K, Ca, and Mg of forest species of natural regeneration in a Lowlands Dense Ombrophilous forest fragment in Pernambuco, Brazil. A phytosociological study of the fragment was carried out and were defined the ten species with the highest absolute density (AD). Three individuals per species were selected. The N, P, K, Ca, and Mg contents were determined in the sample leaves of the species, and the foliar biomass was determined “in loco”. Nine individuals of each species were collected according to the following diameter intervals at the base (DBs): DBs<5 cm; 5≤DBs<10 cm and 10≤DBs<15 cm. The content, stock and BUE of nutrients were calculated per species. The BUE of nutrients by species varied according to the following decreasing order: P>Mg>K>Ca>N. The highest BUE of nutrients was of the species Protium heptaphyllum. In tropical soils of low natural fertility, the use of these species can be recommended in environmental reforestation projects. The difference in the nutritional demand of the forest species can indicate the planting of those with greater capacity of absorption and BUE of nutrients, being more efficient in areas of soils with low natural fertility like in the tropical forests.

scholarly journals Dynamics of natural regeneration after disturbance in a remnant of Mixed Ombrophilous Forest in southern Brazil

2021 ◽  
Vol 16 (3) ◽  
pp. 1
Author(s):  
Alyne Regina Ruggiero ◽  
Lauri Amândio Schorn ◽  
Kristiana Fiorentin dos Santos ◽  
Tatiele Anete Bergamo Fenilli
Keyword(s):  
Natural Regeneration ◽  
Floristic Composition ◽  
Ecological Groups ◽  
Pioneer Species ◽  
Southern Brazil ◽  
Forest Fragment ◽  
Healing Phase ◽  
Successional Species ◽  
Ombrophilous Forest ◽  
Over 40 Years

This study evaluated changes in the structure for remnant Mixed Ombrophilous Forest recovering from logging, which ceased over 40 years ago. Regarding the dynamics of the floristic composition of natural regeneration, 18 species remained (23.38% of the total) and 27 new species entered (35.06% of the total). The greatest increases were observed for Allophylus edulis, Myrsine umbellata, and Miconia cinerascens. When analyzing the dynamics of regeneration in ecological groups, it was observed that pioneer species had a similar value in both surveys (29.4% and 29.6%); secondary species decreased from 56.6% to 52.8%, and late-successional species increased from 0.2% to 6.0%. Therefore, the forest fragment studied is in a healing phase after disturbance, characterized by the increased regeneration of pioneer species as a result of sufficient light entering the interior of the forest.

scholarly journals Nutritional Contribution of Litter in Rainforest of Brazil

2019 ◽  
Vol 11 (3) ◽  
pp. 254
Author(s):  
Rosival B. A. Lima ◽  
Luiz C. Marangon ◽  
Fernando J. Freire ◽  
Ana L. P. Feliciano ◽  
Maria B. G. S. Freire ◽  
...  
Keyword(s):  
Nutrient Cycling ◽  
Vegetative Growth ◽  
Natural Regeneration ◽  
Climatic Changes ◽  
Forest Fragment ◽  
Climatic Variations ◽  
Litter Deposition ◽  
Ombrophilous Forest ◽  
Level Of Importance ◽  
Dense Ombrophilous Forest

Lowlands Dense Ombrophilous Forest is one phytophysiognomies of Atlantic Forest in Brazil. The main ecological characteristic of this forest is the Ombrophilous environment, related to high rainfall and temperature indexes. Nutrient cycling is well balanced in the periods of good thermo-pluviometric distribution. Global climatic changes have been intensifying in recent years making rainfall irregular, changing its distribution and intensity throughout the year. This can affect the natural regeneration and vegetative growth of the species. This study aimed to correlate litterfall and nutrient contribution with climatic variations, identifying the level of importance of this correlation and which nutrients may have their compromised cycling. Literfall was collected monthly in 40 collectors. N, P, K, Ca and Mg contents were determined and their stocks were calculated. The litter deposition was 8,261.15 kg ha-1 year-1 and was not influenced by rainfall and temperature. The N, P, K, Ca and Mg stock in this litter was 244.93 kg ha-1 year-1, being stored just of N 113.75 kg ha-1 year-1. P and K stocks varied with rainfall and temperature, suggesting that variations in these climatic variables may interfere in the cycling of these nutrients in this forest fragment.

scholarly journals Forest restoration by different nucleation techniques in Urochloa grassland

2021 ◽  
Vol 56 ◽  
Author(s):  
Rosimeri de Oliveira Fragoso ◽  
Antonio Aparecido Carpanezzi ◽  
Katia Christina Zuffellato-Ribas ◽  
Henrique Soares Koehler
Keyword(s):  
Natural Regeneration ◽  
Native Species ◽  
Forest Restoration ◽  
Woody Species ◽  
Control Treatment ◽  
Plastic Mulch ◽  
Black Plastic ◽  
Ombrophilous Forest ◽  
Dense Ombrophilous Forest ◽  
Over Time

Abstract: The objective of this work was to evaluate the effect of brushwood, black plastic mulch, herbicide, and artificial perch on the natural regeneration of native species in Urochloa grassland. The experiment was conducted between February 2014 and February 2016 in the Dense Ombrophilous Forest, in the municipality of Morretes, in the state of Paraná, Brazil. The treatments were: herbicide, herbicide + perch, black plastic mulch, black plastic mulch + perch, brushwood + herbicide, brushwood + herbicide + perch, and a control treatment. The evaluations were carried out at 4, 8, 12, 18, and 24 months after the installation of the experiment, by counting and identifying regenerating woody species and estimating visually the percentage of herbaceous coverage. Initially, brushwood and black plastic mulch reduced the Urochloa grasses; however, this effect was lost over time due to the rapid growth of the grasses from the edges to the center of the plots. The use of perches in the treatments does not allow a significant increase of other species because of the continued inhibiting conditions for the establishment of seedlings. The herbicide is effective in removing the grasses; however, the recruitment of woody species is only satisfactory when perches are used to attract the dispersing fauna. For a successful ecological restoration of pastures, there is a need for the local elimination of Urochloa grasses.

scholarly journals Landscape structure and climate seasonality affect the amount, richness and diversity of pollen collected by honeybees in a Neotropical region of Colombia

2020 ◽  
Author(s):  
Paula María Montoya-Pfeiffer ◽  
Guiomar Nates-Parra
Keyword(s):  
Landscape Structure ◽  
Urban Areas ◽  
Native Species ◽  
Diversity Index ◽  
Forest Area ◽  
Colony Development ◽  
Monthly Precipitation ◽  
Forest Species ◽  
Tropical Regions ◽  
Pollen Species

AbstractPollen is the main food for honeybee broods and young workers and so colony development and reproduction rely heavily on pollen availability, both spatially and temporally, in the environment. Intensification of agriculture and climate seasonality are known to alter honeybee foraging patterns and pollen intake through changes in resource availability in temperate regions; however, little is known about how honeybees respond to such environmental factors in tropical regions.Pollen species collected by honeybees in a Neotropical agricultural region of Colombia were identified. The effects of landscape structure (landscape Shannon Diversity Index, forest area in 1000 m around the apiary) and climate seasonality (mean monthly precipitation) on the amount, richness and diversity of pollen collected by the honeybees were evaluated for all pollen species together and pollen species segregated according to forest and anthropic areas (croplands, grasslands, woodlands, urban areas).Honeybees were found to be much more associated with anthropic than forest pollen species regardless of landscape structure or precipitation. However, the amount, richness and diversity of pollen from all species and forest species responded positively to landscape diversity and forest area, suggesting an advantage for honeybees in obtaining small quantities of pollen from forest species, in spite of being well-adapted to forage in anthropic areas. Precipitation was found not to be related to the overall amount and overall richness of pollen collected by honeybees, suggesting that climate seasonality was not an important factor for pollen foraging. Nonetheless, overall pollen diversity was negatively affected by precipitation in less diverse landscapes, while anthropic pollen diversity was negatively affected in more forested landscapes. These findings are compared with those from temperate regions, and the implications for honeybee productivity and survival, and their interactions with Neotropical native species, are discussed.

History of the Larch Sawfly, with Notes on Origin and Biology,

1955 ◽  
Vol 87 (3) ◽  
pp. 103-111 ◽  
Author(s):  
H. C. Coppel ◽  
K. Leius
Keyword(s):  
British Columbia ◽  
North America ◽  
Native Species ◽  
Insect Pest ◽  
Forest Insect ◽  
Larch Sawfly ◽  
History Of ◽  
Biological Characters ◽  
The Difference ◽  
Forest Biology

The larch sawfly, Pristiphora erichronii (Htg.), is currently considered a major forest insect pest in Canada. At the present time within Canada, the sawfly reacts to parasitism by Mesoleius tenthredinis Morley in two ways. In Manitoba and Saslratchewan the sawfly encapsulates approximately 100 per cent of the parasite eggs deposited, whereas in British Columbia encapsulation rarely exceeds four per cent (Muldrew, 1953). The reasons for the difference in degree of encapsulation are apparently unknown; however, since the origin of the sawfly itself is obscure, the possibility exists that a native species, an introduced species, Or a combination of both may he present, or that geographical or ecological units may have arisen. Studies now under way by officers of the Forest Biology and Entomology divisions are attacking the problem of identity and origin following the pattern established for the European spruce sawfly, Diprion hercyniae (Htg.). In this instance, as with the larch sawfly, parasites were introduced on the assumption that the pest had been introduced from Europe. Critical investigations by Reeks (1941) and Balch, Reeks, and Smith (1941), involving morphological, cytological, and other biological characters, showed that the species occurring in North America was one of two species common in Europe, and previously referred to there as Gilpinia polytoma (Htg.). Balch et al. (1941) showed that D. hercyniae had been introduced into North America.

scholarly journals AVALIAÇÃO DA DIVERSIDADE DE ESPÉCIES NATIVAS PRODUZIDAS NOS VIVEIROS FLORESTAIS DO ESTADO DO RIO DE JANEIRO

FLORESTA ◽  
2014 ◽  
Vol 44 (3) ◽  
pp. 369 ◽  
Author(s):  
Jorge Makhlouta Alonso ◽  
Paulo Sérgio Dos Santos Leles ◽  
Telmo Borges Silveira Filho ◽  
Carlos Alberto Bernardo Mesquita ◽  
Marcos Lima Pereira ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Rio De Janeiro ◽  
Native Species ◽  
Forest Restoration ◽  
The State ◽  
Forest Species ◽  
Mata Atlântica ◽  
Production Manager ◽  
Mata Atlantica ◽  
Forest Nurseries

O objetivo deste trabalho foi avaliar a diversidade de espécies florestais nativas produzidas nos viveiros do estado do Rio de Janeiro. O levantamento e diagnóstico foram realizados durante os meses de fevereiro, março e abril de 2010, sendo incluídos os viveiros que produziam mudas de espécies florestais da Mata Atlântica. O trabalho de campo consistiu em visitas a 70 viveiros florestais, nos quais foi requerida a lista das espécies produzidas e realizada entrevista com o responsável, sendo preenchido um questionário englobando diversos temas relacionados à produção de mudas. Foram observadas 277 espécies florestais nativas da Mata Atlântica sendo produzidas nos viveiros, que, em média, trabalham com 56 espécies nativas. A diversidade total de espécies florestais da Mata Atlântica produzidas nos viveiros do Estado do Rio de Janeiro é baixa, assim como a diversidade média, já que mais da metade dos viveiros trabalha com uma listagem de 50 ou menos espécies, número insuficiente considerando a diversidade de espécies florestais presentes nas diferentes formações vegetais do estado.Palavras-chave: Mudas florestais; restauração florestal; Mata Atlântica. AbstractAssessment of diversity of native species produced in forest nurseries of Rio de Janeiro State. The objective of this paper was to evaluate the diversity of native species produced by nurseries in the State of Rio de Janeiro. The diagnostic and survey were conducted during the months of February, March and April of the year 2010, the research included all nurseries that produced seedlings of Atlantic Forest species. The fieldwork consisted of visits to the 70 surveyed nurseries, in which a list of the species produced in the nursery was requested and the seedling production manager was interviewed, filling in a questionnaire covering various topics related to seedlings production. We observed 277 forest species native from the Atlantic Forest produced in the nurseries. In average, the nurseries produce 56 different native species. The total diversity of native species produced in the State of Rio de Janeiro is low, as well as the mean diversity, since more than half of the nurseries work with a list of 50 or fewer species, what is insufficient considering the diversity of forest species that occur in the different vegetation types of the state.Keywords: Forest seedlings; forest restoration; Atlantic Forest.

scholarly journals Growth of tropical tree species and absorption of copper in soil artificially contaminated

2015 ◽  
Vol 75 (4 suppl 1) ◽  
pp. 119-125 ◽  
Author(s):  
R. F. Silva ◽  
R. Andreazza ◽  
C. Da Ros ◽  
A. Dellai ◽  
R. J. S. Jacques ◽  
...  
Keyword(s):  
Native Species ◽  
Negative Impact ◽  
Contaminated Sites ◽  
Indigenous Species ◽  
Forest Species ◽  
Tropical Tree Species ◽  
Efficient Alternative ◽  
Copper Contaminated ◽  
Different Doses

Abstract Reclamation of copper contaminated sites using forest species may be an efficient alternative to reduce the negative impact. The aim of this study was to quantify the growth and evaluate the quality of seedlings of native species at different doses of copper in the soil. The experimental design was completely randomized, with seven replications in a factorial arrangement (3×9), using three indigenous species of plants (Anadenanthera macrocarpa, Mimosa scabrella and Apuleia leiocarpa) and nine doses of copper in the soil (0, 60, 120, 180, 240, 300, 360, 420 and 480 mg kg–1).The experiment was carried out in a greenhouse which the seedlings were grown for 180 days. The experimental units were plastic pots of 125 cm3 filled with Oxisol. The results indicated that the levels of copper applied to the soil decreased the quality of seedlings and growth of Apuleia leiocarpato a lesser extent compared with Mimosa scabrella and Anadenanthera macrocarpa. Anadenanthera macrocarpa was the forest species that resulted in the lowest copper translocation from roots to shoots. In addition, the Apuleia leiocarpa exhibited high resistance and tolerance for copper in the soil and also, it is highlighted an ability for copper phytoremediation.

Seasonality and habitat influence on bat assemblage structure in an urban Atlantic Forest remnant from Southeastern Brazil

Mammalia ◽  
2017 ◽  
Vol 81 (3) ◽  
Author(s):  
Roberto Leonan M. Novaes ◽  
Renan F. Souza ◽  
Saulo Felix ◽  
André C. Siqueira ◽  
Rafael S. Laurindo ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Capture Rate ◽  
Species Abundance ◽  
Assemblage Structure ◽  
Southeastern Brazil ◽  
Feeding Guilds ◽  
Forest Fragment ◽  
Historical Processes ◽  
Forest Remnant ◽  
Ombrophilous Forest

AbstractThe Brazilian Atlantic Forest is a severely threatened biodiversity hotspot and many remnants exist only as fragments. In order to understand how bat assemblage structure within a forest fragment surrounded by an urban matrix might respond to seasonality and different habitats, we sampled bats over 39 nights in the forest fragment of Gericinó-Mendanha Massif, Rio de Janeiro State. From February 2006 to January 2010, we captured 874 bats, belonging to 25 species and eight different feeding guilds. Frugivorous species were the most abundant, representing 83.33% of captures, and the gleaning insectivores were the least abundant (1.47%). We did not find changes in bat species composition between seasons, although capture rate was higher in the rainy season. However, we did find significant differences in species abundance between seasons. The habitat influence did not significantly differentiate the assemblages, but species richness was higher in the mature ombrophilous forest. The community composition indicates that this conservation unit is an important remaining fragment for maintaining the diversity and richness of bats, although it is possible that historical processes of environmental exploitation have already resulted in a loss of species.

scholarly journals   The effect of mineral N fertiliser and sewage sludge on yield and nitrogen efficiency of silage maize

2012 ◽  
Vol 58 (No. 2) ◽  
pp. 76-83 ◽  
Author(s):  
J. Černý ◽  
J. Balík ◽  
M. Kulhánek ◽  
F. Vašák ◽  
L. Peklová ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Mineral Fertilizer ◽  
Utilization Efficiency ◽  
Nitrogen Efficiency ◽  
Mineral N ◽  
Silage Maize ◽  
Nitrogen Utilization Efficiency ◽  
N Efficiency ◽  
Second Year ◽  
The Difference

A field experiment was conducted on a chernozem soil to estimate fertiliser N efficiency of silage maize (Zea mays L.) by the difference method as influenced by the type of N fertiliser (mineral-MF vs. sewage sludge-SS), and N rate. Eight N treatments were included (0, 60, 120, 180, and 240 kg N/ha prior to maize sowing, 60 kg N/ha at planting in MF; 120, and 240 kg N/ha in SS. The average dry mater (DM) yields were 11.2&ndash;14.8 t/ha. Average nitrogen uptakes were 88&ndash;185 kg N/ha, when the average N contents in DM were 0.8&ndash;1.25%. Nitrogen utilization efficiency (NUE) was a relatively stable value for treatments with MF. The best use of nitrogen from MF was reached by 60 and 120 kg/ha N doses. The average values of recovery efficiency of applied N (RE<sub>N</sub>) were calculated as 41&ndash;57%. The use of SS increased the yield of silage maize by 19&ndash;25% compared to control, above all first and second year after their application. Mineral-fertilizer-N equivalents (MFE) for SS were calculated as 55 and 64%. &nbsp;

scholarly journals Isotopic abundance of 13 C and contribution of eucalyptus biomass to soil organic matter conversion

2017 ◽  
Vol 47 (4) ◽  
Author(s):  
Fabiane Figueiredo Severo ◽  
Natália Tobin Aita ◽  
Laila Garcia Marques ◽  
Leandro Souza da Silva
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Natural Regeneration ◽  
Conversion Process ◽  
Initial Management ◽  
Natural Pasture ◽  
Crop Type ◽  
Isotope Ratio Mass Spectrometer ◽  
Native Tree Species ◽  
The Difference

ABSTRACT: It has become possible to evaluate the conversion of soil organic matter (SOM) in pastures and arboreal crops due to the difference between the photosynthetic cycles of Eucalyptus (C3) and most grasses (C4). The auto analyzer method coupled to the IRMS (Isotope Ratio Mass Spectrometer) in the present study evaluated the 13C content in soil profiles of Eucalyptus plantations of different ages (2, 10 and 21 years), in natural regeneration areas and natural grazing fields, and estimated the SOM conversion of each crop type of. The initial management of all sampled areas was natural pasture. The following profile layers were evaluated: 0-5, 5-10, 10-20, 20-30, 30-40, 40-50, 50-70 and 70-90cm, and the contribution of Eucalyptus biomass over the years of farming was estimated in the SOM conversion process. After 2 years of planting Eucalyptus, the beginning of pasture carbon conversion process occurred in the surface layer (0-5cm). Ten years after planting, the process of converting organic matter by arboreal crops reached the layers up to 20cm. After 21 years of planting and in natural regeneration areas, the entire profile has already been changed by planting Eucalyptus and native tree species.

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