scholarly journals Salinity effect on seedling growth, water, sodium and potassium distributions in the mangrove species (Avicennia germinans L. (Avicenniaceae)) in semi controlled conditions.

2009 ◽  
Vol 19 (3) ◽  
Author(s):  
VD Taffouo ◽  
T Fonkou ◽  
M Kenne ◽  
OF Wamba ◽  
A Akao
Keyword(s):  
Seedling Growth ◽  
Avicennia Germinans ◽  
Mangrove Species ◽  
Salinity Effect ◽  
Controlled Conditions ◽  
Sodium And Potassium

scholarly journals Forest Structure and Projections of Avicennia germinans (L.) L. at Three Levels of Perturbation in a Southwestern Gulf of Mexico Mangrove

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 989
Author(s):  
Basáñez-Muñoz Agustín de Jesús ◽  
Jordán-Garza Adán Guillermo ◽  
Serrano Arturo
Keyword(s):  
Size Structure ◽  
Transition Probabilities ◽  
High Sensitivity ◽  
Avicennia Germinans ◽  
Mangrove Forests ◽  
Mangrove Species ◽  
Adult Trees ◽  
Mangrove Dynamics ◽  
Projection Matrices ◽  
Partial Tree

Mangrove forests have declined worldwide and understanding the key drivers of regeneration at different perturbation levels can help manage and preserve these critical ecosystems. For example, the Ramsar site # 1602, located at the Tampamachoco lagoon, Veracruz, México, consists of a dense forest of medium-sized trees composed of three mangrove species. Due to several human activities, including the construction of a power plant around the 1990s, an area of approximately 2.3 km2 has suffered differential levels of perturbation: complete mortality, partial tree loss (divided into two sections: main and isolated patch), and apparently undisturbed sites. The number and size of trees, from seedlings to adults, were measured using transects and quadrats. With a matrix of the abundance of trees by size categories and species, an ordination (nMDS) showed three distinct groups corresponding to the degree of perturbation. Projection matrices based on the size structure of Avicennia germinans showed transition probabilities that varied according to perturbation levels. Lambda showed growing populations except on the zone that showed partial tree loss; a relatively high abundance of seedlings is not enough to ensure stable mangrove dynamics or start regeneration; and the survival of young trees and adult trees showed high sensitivity.

scholarly journals Post-Glacial Expansion and Population Genetic Divergence of Mangrove Species Avicennia germinans (L.) Stearn and Rhizophora mangle L. along the Mexican Coast

PLoS ONE ◽  
2014 ◽  
Vol 9 (4) ◽  
pp. e93358 ◽  
Author(s):  
Eduardo Sandoval-Castro ◽  
Richard S. Dodd ◽  
Rafael Riosmena-Rodríguez ◽  
Luis Manuel Enríquez-Paredes ◽  
Cristian Tovilla-Hernández ◽  
...  
Keyword(s):  
Genetic Divergence ◽  
Population Genetic ◽  
Rhizophora Mangle ◽  
Avicennia Germinans ◽  
Mangrove Species ◽  
Glacial Expansion

Increasing fluctuations of soil salinity affect seedling growth performances and physiology in three Neotropical mangrove species

2014 ◽  
Vol 380 (1-2) ◽  
pp. 399-413 ◽  
Author(s):  
Felix Bompy ◽  
Gauthier Lequeue ◽  
Daniel Imbert ◽  
Maguy Dulormne
Keyword(s):  
Seedling Growth ◽  
Soil Salinity ◽  
Mangrove Species ◽  
Growth Performances

scholarly journals Geographic and environmental contributions to genomic divergence in mangrove forests

2020 ◽  
Author(s):  
Michele Fernandes da Silva ◽  
Mariana Vargas Cruz ◽  
João de Deus Vidal Júnior ◽  
Maria Imaculada Zucchi ◽  
Gustavo Maruyama Mori ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Avicennia Germinans ◽  
Global Changes ◽  
Mangrove Forests ◽  
Tidal Variation ◽  
Mangrove Species ◽  
Coastal Species ◽  
Precipitation Regimes ◽  
Isolation By Environment ◽  
Mangrove Trees

ABSTRACTAssessing the relative importance of geographic and environmental factors to the spatial distribution of genetic variation may provide relevant information about the processes that maintain genetic variation in natural populations. With a globally wide but very restricted habitat distribution, mangrove trees are an interesting model for studies aiming to understand the contributions of these factors. Mangroves occur along the continent-ocean interface of tropical and subtropical latitudes, regions considered inhospitable to many other plant types. Here, we used landscape genomics approaches to investigate the relative contributions of geographic and environmental variables to the genetic variation of two black mangrove species, Avicennia schaueriana and Avicennia germinans, along the South American coast. Using single nucleotide polymorphisms, our results revealed an important role of ocean currents in the gene flow of A. schaueriana and isolation by environment as the pattern that best explains the genetic differentiation of A. germinans. Additionally, for both species, we observed significant correlations between genetic variation with evidence of selection and precipitation regimes, tidal variation, solar radiation and temperature patterns. These discoveries expand our knowledge about the evolution of mangrove trees and provide important information to predict future responses of coastal species to the expected global changes for this century.

scholarly journals Status and perspectives of mangrove management in Côte d'Ivoire

2021 ◽  
Vol 9 (2) ◽  
pp. 045-050
Author(s):  
Egnankou Wadja Mathieu ◽  
Gnagbo Anthelme
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Avicennia Germinans ◽  
Mangrove Species ◽  
Entropy Model ◽  
Cote D’Ivoire ◽  
Intertidal Zones ◽  
Conocarpus Erectus ◽  
Côte D'ivoire ◽  
Mode Of Operation

Mangroves are ecosystems characteristic of intertidal zones in tropical and subtropical regions. Rhizophora racemosa, Avicennia germinans and Conocarpus erectus are characteristic mangrove species found in Côte d'Ivoire. These mangroves could disappear without being fully studied due to the strong anthropic pressure. This study therefore proposes to establish a detailed cartography of the mangroves reported in Côte d'Ivoire and to model their potential distribution. Mangroves cover approximately 57.92 km², ie a linear coverage of 20.11% of the 540.14 km of coastline. The extent of these mangroves also decreased by 4.91 km² between 1996 and 2016. The maximum entropy model presents low-altitude coastal areas with high rainfall as well as average sunshine as favorable to mangroves. The particular ecological characteristic of mangroves as well as their particular mode of operation deserve to be taken into account in studies of flora in Côte d'Ivoire. It is therefore opportune to consider larger studies focusing specifically on the mangroves present in Ivory.

scholarly journals Effects of a growth promoter on bean (Phaseolus vulgaris L.) crops in Sancti Spíritus province, Cuba

2017 ◽  
Vol 66 (3) ◽  
pp. 360-366 ◽  
Author(s):  
Kolima Peña Calzada ◽  
Juan Carlos Rodríguez Fernández ◽  
Martín Santana Sotolongo ◽  
Dilier Olivera Viciedo ◽  
Cesar Danilo Valle Expósito ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Seed Germination ◽  
Seedling Growth ◽  
Field Experiments ◽  
Seed Quality ◽  
Latin Square ◽  
Growth Promoter ◽  
Phaseolus Vulgaris L ◽  
Controlled Conditions ◽  
Randomized Design

In order to evaluate the effect of a growth promoter on the productivity performance and seed-quality in bean (Phaseolus vulgaris L.) crops, two experiments were carried out, one in the field and under controlled conditions. In the field experiments, a Latin square design was used for four treatments as follows: control, 0.5, 0.8 and 1.0 l.ha-1, respectively, where yield components were evaluated. The seeds used in the controlled conditions experiment were from prior trials, in a totally randomized design, at the dosages above mentioned. Seed germination and seedling growth were evaluated. In the field experiments, the product had a stimulating effect on the production. The highest yields were reached with the 0.8 and 1.0 l.ha-1 dosages in number 1, with values of 3.09 and 3.02 t.ha-1, and in number 2, the treatment with the best results was 1.0 l.ha-1, with a yield of 2.07 t.ha-1. In germination, there were significant differences among variables only in the first assessment at three days after planting. The best performance in seedling growth and in dry matter production was the treatment with seeds from the 0.5 l.ha-1 dosage in experiment 1. In addition, in number 2, performance among variables was similar. Therefore, VIUSID agro improved the bean yield performance and did not affect later seed germination nor initial seedling growth.

Sign in / Sign up

Export Citation Format

Share Document