mangrove environment
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2022 ◽  
Vol 304 ◽  
pp. 114273
Author(s):  
H.S. Auta ◽  
O.P. Abioye ◽  
S.A. Aransiola ◽  
J.D. Bala ◽  
V.I. Chukwuemeka ◽  
...  

2021 ◽  
Vol 47 (2) ◽  
pp. 121-136
Author(s):  
Tumpa Saha ◽  
Subrota Kumar Saha

The contemporary intertidal foraminifera and estuarine environment information were collected from the four sites adjoining the deltaic mangrove environment in the Sundarbans. The marsh zones of the south-western coastal region of Bangladesh were examined for modern benthic foraminifera and to expound on the relationship of the foraminiferal assemblages with the environment. Due to high inaccessibility and remoteness, the taxonomic study of foraminifera and its depositional environment remains largely overlooked in the Sundarbans of Bangladesh. This study includes a detailed survey of depositional environment of these fluvio-deltaic to shallow marine sediments. The seventeen species belonging to fourteen genera representing nine families were recorded from surficial sediment of supratidal, intertidal, and dune environment of Kotka, Jamtala, Kochikhali, and Dimer char area. In the present study, these foraminiferal assemblages are characterized calcareous and agglutinated foraminifera. The Kotka beach is recognized as Nonionina assemblage zone, Jamtala beach designated as Ammonia assemblage zone, Kochikhali as Nonionina assemblage zone and Dimer char as Rosalina-Nonionina-Nonionella assemblage zone. The deposition of foraminifera is restricted to Sundarbans’ low to high marsh zone. J. Asiat. Soc. Bangladesh, Sci. 47(2): 121-136, December 2021


2021 ◽  
Vol 4 (6) ◽  
pp. 277-286
Author(s):  
Sharda Dhadse ◽  
Pramila Majumdar ◽  
Ashwini Valluri ◽  
Purushottam Sakhare

Mangroves are one of the most undermined biological systems. They have immense ecological and economic advantages. Consistent, increment in natural and coastal development like a change of wetlands for hydroponics, construction for tourism, the tsunami has led to the demolishment of mangrove environments in India. The inhabitants of minor zones are at risk of losing their livelihood and there is a threat to the existence of the mangrove ecosystem. It has been noted that from a decade ago, about 40% of the Indian mangrove territories have been lost. At present, the environmental changes and increased anthropogenic activities have become a significant concern for the conservation and sustaining of the mangroves. Conservation of mangrove environment can be accomplished by increasing awareness about their significance among various stakeholders and safeguarding them through mandatory national policy and regulations. A specific policy like Coastal Zone Regulation has been formulated to ensure mangrove conservation, sustainable existence of local community habitat along the coastal area, fishing community, and coastal stretches for marine habitat have been protected.


The Holocene ◽  
2021 ◽  
pp. 095968362110417
Author(s):  
Madhab Naskar ◽  
Ruby Ghosh ◽  
Sayantani Das ◽  
Dipak Kumar Paruya ◽  
Binod Saradar ◽  
...  

Reliability of grass phytoliths for discriminating different deltaic sub-environments has been assessed on the modern surface sediments collected along the salinity gradient of the Sunderbans delta, India. It has been observed that grass phytolith assemblages can successfully distinguish different deltaic sub-environments especially the true mangrove zones from the mangrove associate and non-mangrove zones with minor overlaps, which further corroborated with the results of discriminant analysis (DA). Detrended correspondence analysis (DCA) and redundancy analysis (RDA) performed on the surface grass phytolith data show that salinity is the most crucial environmental parameter influencing grass phytolith distribution in the deltaic sub-environments. The potential of modern grass phytolith data in reconstructing past deltaic environmental changes has been further assessed on a late Quaternary fossil phytolith spectra from the Sunderbans spanning a sedimentary record for the last ~13.6 ka. A true mangrove environment with discernible tidal influence has been revealed between 13.6 and 3.9 ka. Absence of true mangrove–indicator grass phytoliths between ~3.9 and 2.2 ka further suggests disappearance of mangrove vegetation from this part of the Sunderbans which might have recolonized during ~2.2–0.8 ka. A mangrove associated or non-mangrove environment with little or no tidal influence came into existence in the study area since 0.8 ka onwards. A comparison with some earlier records suggests that the present grass phytolith-based palaeoenvironmental data shows conformity with the past dynamics in mangrove ecosystem in the east coast of India in respect to relative sea level changes.


Author(s):  
Marie-Noëlle Sylvestre ◽  
Patrick Jean-Louis ◽  
Adrien Grimonprez ◽  
Philippe Bilas ◽  
Amandine Collienne ◽  
...  

A large (47.75±3.56 µm in diameter) Thiovulum bacterial strain forming white veils is described from marine mangrove ecosystem. High sulfide concentrations (up to 8 mM of H2S) were measured on the sunken organic matters (wood/bone debris) in laboratory conditions. This sulfur-oxidizing bacterium colonized such organic matter forming white veil. According to conventional scanning electron microscope (SEM) observations, bacterial cells are ovoid and slightly motile by numerous small flagella present through the cell surface. Intracytoplasmic large internal sulfur granules were shown suggesting a sulphidic-based metabolism. Observations were confirmed by sulfur elemental sulfur distribution detected by energy-dispersive X-ray spectroscopy (EDXS) analysis using environmental scanning electron microscope (ESEM) on non-dehydrated samples. Phylogenetic analysis of partial sequence of 16S rDNA obtained from purified fractions of this -proteobacteraeota strain indicates that this bacterium belongs to the Thiovulaceae cluster and could be one of the largest Thiovulum ever described. We propose to name this species “Candidatus Thiovulum sp. strain imperiosus”.


2021 ◽  
Vol 3 (2) ◽  
pp. 99-109
Author(s):  
Zuhriati Khalid ◽  
Andi Putra Sitorus ◽  
Rehulina Sitepu

Tujuan kegitan Pengabdian pada masyarakat ini adalah meningkatakan pemahaman dan kepedulian masyarakat terhadap lingkungan mangrove di wilayah pantai Muara Indah Kabupaten Deli Serdang. Mitra pengabdian adalah warga masyarakat yang berada diwilayah pantai deli serdang. Metode yang digunakan dalam pengabdian masyarakat ini adalah pendekatan persuasive dengan metode penyuluhan. Tingkat pemahaman mitra terhadap keseluruhan indictor terjadi peningkatan dari 30,8 menjadi 82,7 dengan rata-rata peningkatan mencapai 51.8. ini menunjukkan bahwa mitra memahami dan menguasai materi lingkungan mangrove dalam hal menjaga dan merawat. Kegitan-kegitan penyuluhan dan pelatihan masih perlu dilakukan secara berkelanjutan agar masyarakat benar-benar memahami dan sadar untuk menjaga lingkungan sekitar agar tetap seimbang. Increasing Understanding and Awareness of Village Community towards Mangrove Environment at Muara Indah Beach, Deli Serdang Regency The purpose of this community service activity is to increase public understanding and concern for the mangrove environment in the Muara Indah coastal area, Deli Serdang Regency. Service partners are community members in the Deli Serdang beach area. The method used in this community service is a persuasive approach with the extension method. The level of understanding of partners on all indicators increased from 30.8 to 82.7 with an average increase of 51.8. This shows that partners understand and master mangrove environmental materials in terms of maintaining and caring for them. Extension and training activities still need to be carried out on an ongoing basis so that the community really understands and is aware of keeping the surrounding environment in balance.


Author(s):  
Neuma Teixeira dos Santos ◽  
Roberta Modesto Braga ◽  
Adilson Oliveira do Espírito Santo

ResumoÉ papel fundamental da universidade proporcionar aos seus graduandos em formação articulação entre os diversos saberes. Nesse aspecto, as relações, propostas na literatura entre a Modelagem Matemática e os sete saberes da complexidade de Edgar Morin, podem ser potencializadoras de aprendizagem em uma atividade de formação e ambientação no manguezal da reserva extrativista marinha de Tracuateua-PA para monitoramento da vegetação de mangue por ser uma responsabilidade de cogestão de toda a sociedade a conservação desses ambientes. Para alcançar o objetivo nessa pesquisa, qual seja o de discutir os resultados de uma atividade de Modelagem a partir dos sete saberes no contexto da temática ambientação no manguezal, foi realizado um minicurso envolvendo estudantes de diversas graduações, professores universitários e comunitários e, a partir da descrição da observação participante, diário de campo, dos relatórios e questionários produzidos pelos estudantes, foi possível perceber que todas as ações caminharam dialogando com o princípio do pensamento complexo e a Modelagem ocorreu de forma livre, mostrando que mesmo não sendo definida a priori, as etapas estiveram presentes em todo o processo. Diante do exposto, enfatiza-se que as atividades transdisciplinares devem ocorrer sem delimitações e as fronteiras tradicionais da estrutura universitária devem ser enfrentadas no processo de construção das aprendizagens necessárias para o enfrentamento dos desafios do século XXI.Palavras-chave: Conservação, Monitoramento, Transdisciplinar, Universidade.AbstractThe fundamental role of the university is to provide its undergraduate students with articulation among the different types of knowledge. And in this respect, the relationships proposed in the literature among Mathematical Modeling and the seven knowledge of Edgar Morin's complexity can be an enabler of learning in a formation and  ambiance activity in the mangrove to monitor mangrove vegetation because it is a responsibility of co-management of society the conservation of these environments. To achieve the objective of this research to discuss the results of a Modeling activity based on the seven knowledge in the context of the mangrove environment, a workshop was held involving students from different degrees, university and community professors and from the description of field observation, from the reports and questionnaires produced by the students, it was possible to notice that all actions walked in agreement with the principle of complex thinking and the Modeling occurred freely, showing that even if it was not defined a priori, the steps were present throughout the process. Given the above, it is emphasized that transdisciplinary activities must take place without boundaries and the traditional boundaries of the university structure must be faced in the process of building the learning necessary to face the challenges of the 21st century.Keywords: Conservation, Monitoring, Transdisciplinary, University.ResumenEs papel fundamental de la universidad proporcionar a sus estudiantes de pregrado una articulación entre los diferentes tipos de conocimiento. Y en este sentido, las relaciones propuestas en la literatura entre el Modelaje Matemático y los siete conocimientos de la complejidad de Edgar Morin pueden ser un facilitador del aprendizaje en una actividad de capacitación y montaje en el manglar para monitorear la vegetación del manglar porque es una responsabilidad del co-manejo de la sociedad para la conservación de estos ambientes. Para lograr el objetivo de esta investigación para discutir los resultados de una actividad de modelación basada en los siete conocimientos en el contexto del escenario temático en el manglar, se realizó un mini-curso en que fueron envueltos los estudiantes de diferentes titulaciones, profesores universitarios y comunitarios y a partir de la descripción de la observación de campo, de los informes y cuestionarios elaborados por los estudiantes, se pudo percibir que todas las acciones caminaron en sintonía con el principio del pensamiento complejo y el Modelaje ocurrió libremente, mostrando que a pesar de no se haber definido a priori, los pasos estuvieron presentes en todo el proceso. En vista de lo anterior, se enfatiza que las actividades transdisciplinarias deben desarrollarse sin fronteras y las fronteras tradicionales de la estructura universitaria deben ser enfrentadas en el proceso de la construcción de los aprendizajes necesarios para enfrentar los desafíos del siglo XXI.Palabras clave: Conservación, Monitoreo, Transdisciplinario, Universitario.


Nova Hedwigia ◽  
2020 ◽  
Vol 111 (3) ◽  
pp. 417-428
Author(s):  
David Ítallo Barbosa ◽  
Laise de Holanda Cavalcanti

The global distribution of Licea testudinacea is updated with a new record from a mangrove environment in Brazil. This myxomycete possesses a broad global distribution despite the scarcity of records, which is probably due to its small size and inconspicuous sporocarp color, which make it difficult to observe in the field. The species occurs on all continents, from sea level up to elevations ≥3000 m, and is known to sporulate in several types of forests, grasslands, taigas and tundras. In the Neotropics, it has been recorded in Mexico, Guatemala and Costa Rica, in forested and non-forested areas at high elevations and with high rainfall. The present study represents the first record of the occurrence of L. testudinacea in South America and the first for a mangrove environment throughout its range. The record is based on sporulating specimens found on a living tree of Rhizophora mangle (Rhizophoraceae) in the state of Pernambuco, Northeast Brazil. The specimens of L. testudinacea are described and illustrated. Characteristic features of its microhabitat, its global distribution and an identification key for sessile species with peridial dehiscence by plates and free and warted spores are presented.


2020 ◽  
Vol 308 ◽  
pp. 110166 ◽  
Author(s):  
Caroline Frota Brito de Almeida Salema ◽  
Paulo Goberlânio de Barros Silva ◽  
Patrícia Maria da Costa Oliveira ◽  
Juliana Paiva Marques Lima ◽  
Ricardo Henrique Alves da Silva ◽  
...  

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