Do environmental factors affect the male frequency of exotic mangrove species Laguncularia racemosa (Combretaceae) along the southeast coast of China?

2018 ◽  
Vol 52 (2-3) ◽  
pp. 235-244 ◽  
Author(s):  
Xiuli Wang ◽  
Liang Zhou ◽  
Changyi Lu
Keyword(s):  
Environmental Factors ◽  
Laguncularia Racemosa ◽  
Mangrove Species ◽  
Southeast Coast ◽  
Male Frequency

scholarly journals Paleoenvironment interpretation of a 1760 years B.P. old sediment in a mangrove area of the Bay of Guanabara, using pollen analysis

2006 ◽  
Vol 78 (2) ◽  
pp. 227-229 ◽  
Author(s):  
Ortrud M. Barth ◽  
Luiz E.U. São-Thiago ◽  
Marcia A. Barros
Keyword(s):  
Pollen Analysis ◽  
Rain Forest ◽  
Pollen Grains ◽  
Laguncularia Racemosa ◽  
Mangrove Species ◽  
Mangrove Area ◽  
Sandy Ground ◽  
Drilling Core ◽  
Actual Size ◽  
Avicennia Schaueriana

A sediment sample was obtained at 122 cm from the top of a drilling core in the Guapimirim mangrove, Bay of Guanabara, and analyzed using pollen analysis. This muddy core reached a sandy ground at 133 cm. 14C datation got the age of 1760 ± 50 years B.P. The most frequent pollen grains were mangrove species of Rhizophora mangle, Laguncularia racemosa and Avicennia schaueriana. "Restinga" and tropical rain forest vegetation was recognized behind the mangrove. After the last sea transgression at 2500 years B.P., the water level lowered to its actual size, allowing the installation of this mangrove.

scholarly journals The effects of selective cutting on the dominance and the relative density of mangrove species in the complex of the Guaxindiba river/Engenheiro Antonio Resende channel, Rio de Janeiro

2015 ◽  
Vol 43 (1) ◽  
Author(s):  
Gabriele Paiva CHAGAS ◽  
Carlos Eduardo REZENDE ◽  
Elaine BERNINI
Keyword(s):  
Relative Density ◽  
Rio De Janeiro ◽  
Avicennia Germinans ◽  
Laguncularia Racemosa ◽  
Residential Areas ◽  
Mangrove Species ◽  
Selective Cutting ◽  
Species Dominance ◽  
Breast Height ◽  
Janeiro State

This study evaluated the effect of selective cutting on the dominance and the relative density of mangrove species in the Complex of the Guaxindiba River/Engenheiro Antonio Resende Channel, in Rio de Janeiro State, Brazil. Ten plots were demarcated along the estuary and within each plot measurements were taken of the diameter at breast height (DBH) for individuals > 2.5 cm. Measurements of selective cutting and regrowth were made for the different species. The cutting of vegetation was registered in 9 of the 10 plots analyzed and varied from 2 to 43%. 4. There was no relation between the percent of trunks cut and the proximity of residential areas. Selective cutting was found for Avicennia germinans and Laguncularia racemosa, but only L. racemosa presented regrowth. The results suggest that L. racemosa is more highly affected by selective cutting when compared to the other species, though this impact did not modify the species dominance and the relative density in the mangrove analyzed due to the high regrowth of L. racemosa. Keywords: mangrove, estuary, conservation, vegetation

scholarly journals Fungal succession on the decomposition of three plant species from a Brazilian mangrove

2021 ◽  
Author(s):  
Marta A Moitinho ◽  
Josiane B Chiaramonte ◽  
Laura Bononi ◽  
Thiago Gumiere ◽  
Itamar S Melo ◽  
...  
Keyword(s):  
Plant Species ◽  
Fungal Community ◽  
Plant Material ◽  
Laguncularia Racemosa ◽  
Mangrove Forests ◽  
Mangrove Habitat ◽  
Mangrove Species ◽  
Core Microbiome ◽  
Primary Driver ◽  
Common Plant

Leaf decomposition is the primary process in release nutrients in the dynamic mangrove habitat, supporting the ecosystem food webs. On most environments, fungi are an essential part of this process. However, due to the peculiarities of mangrove forests, this group is currently neglected. Thus, this study tests the hypothesis that fungal community display an specific succession pattern in different mangrove species. A molecular approach was employed to investigate the dynamics of the fungal community during the decomposition of three common plant species (Rhizophora mangle, Laguncularia racemosa, and Avicennia schaueriana) from the mangrove habitat located at the southeast of Brazil. Plant material was the primary driver of fungi communities but time also was marginally significant for the process, and evident changes in the fungal community during the decomposition process were observed. The five most abundant classes common to all the three plant species were Saccharomycetes, Sordariomycetes, Tremellomycetes, Eurotiomycetes, and Dothideomycetes, all belonging to the Phylum Ascomycota. Microbotryomycetes class were shared only by A. schaueriana and L. racemosa, while Agaricomycetes class were shared by L. racemosa and R. mangle. The class Glomeromycetes were shared by A. schaueriana and R. mangle. The analysis of the core microbiome showed that Saccharomycetes was the most abundant class. In the variable community, Sordariomycetes was the most abundant one, mainly in the Laguncularia racemosa plant. The results presented in this work shows a specialization of the fungal community regarding plant material during mangrove litter decomposition.

scholarly journals Reproductive phenology and influence of abiotic variables for two mangrove species in northeastern Brazil

Rodriguésia ◽  
2021 ◽  
Vol 72 ◽  
Author(s):  
Frederico Lage-Pinto ◽  
Pedro Silva Fernando ◽  
Alan Felix Meyer Carletto ◽  
Elaine Bernini
Keyword(s):  
River Estuary ◽  
Avicennia Germinans ◽  
Northeastern Brazil ◽  
Circular Statistics ◽  
Reproductive Phenology ◽  
Laguncularia Racemosa ◽  
Mangrove Species ◽  
Floral Buds ◽  
Abiotic Variables ◽  
Flowering Rhythm

Abstract Information on plant phenological patterns aids in understanding the structure and functioning of ecosystems and support restoration projects in degraded areas. The aim of this study was to characterize the reproductive phenology of Avicennia germinans and Laguncularia racemosa in a mangrove forest in the Mamanguape River estuary in northeastern Brazil. The characterization was performed monthly from July 2016 to June 2017. We applied circular statistics to detect seasonal trends, calculated intra-specific synchrony, and performed regressions between the reproductive phenophases and the abiotic variables. Avicennia germinans exhibits seasonal responses to floral buds, flowers at anthesis, and fruit, with one reproductive episode per year (annual pattern). Laguncularia racemosa has no seasonal response, with one reproductive episode per year for floral buds (annual pattern) and two episodes for flowers at anthesis and fruits (subannual pattern). Reproductive phenophases of A. germinans exhibited higher intra-specific synchrony than L. racemosa. We provide evidence that temperature, solar radiation and rainfall are important drivers of the flowering rhythm in both species. In conclusion, the results of this study showed that the species exhibited different phenological responses, even though they were subjected to the same abiotic conditions.

Changes in mangrove species assemblages and future prediction of the Bangladesh Sundarbans using Markov chain model and cellular automata

2015 ◽  
Vol 17 (6) ◽  
pp. 1111-1117 ◽  
Author(s):  
Anirban Mukhopadhyay ◽  
Parimal Mondal ◽  
Jyotiskona Barik ◽  
S. M. Chowdhury ◽  
Tuhin Ghosh ◽  
...  
Keyword(s):  
Markov Chain ◽  
Environmental Factors ◽  
Cellular Automata ◽  
Markov Chain Model ◽  
Species Assemblages ◽  
Chain Model ◽  
Mangrove Species ◽  
Future Prediction

The composition and assemblage of mangroves in the Bangladesh Sundarbans are changing systematically in response to several environmental factors.

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