scholarly journals Phenological Traits, Litterfall Production, and Carbon Sequestration Rates of Major Three Species in the Sundarbans

2020 ◽  
Author(s):  
Md. Kamruzzaman ◽  
Sumonta Kumar Paul
Keyword(s):  
Carbon Sequestration ◽  
Seasonal Pattern ◽  
Reproductive Phenology ◽  
Mangrove Forests ◽  
Flower Buds ◽  
Mangrove Species ◽  
Litterfall Production ◽  
Heritiera Fomes ◽  
Sundarbans Mangrove ◽  
The Sundarbans

Abstract BackgroundAttempt to compare the phonological pattern of the three mangrove species: Heritiera fomes, Bruguiera sexangula, and Xylocapus mekongensis in the Sundarbans mangrove forest by observing the litterfall data over 3 years.ResultsAll these three species showed highest litterfall of leaves and stipules in summer and lowest in winter. In case of B. sexangula, it also showed its second peak of leaves litterfall in the rainy season. Branch litterfall for the three species was occurred all over the year without having a distinct seasonal pattern. Flowering was observed in February – June and March - May for H. fomes and X. mekomgensis, respectively. Fruiting was observed for H. fomes and X. mekongensis in between the month of March – May and April – June respectively. Peak of mature fruit or seed litterfall was observed in July and August for both H. fomes and X. mekongensis respectively. Litterfall of flower buds, flowers and propagule for B. sexangula was observed throughout the year and peak flower buds, flowers, and propagule litterfall was found in the month of January, March, and July respectively. Kendall’s coefficient of concordance showed that all the organs of litterfall were concordant during the study period. Autocorrelation coefficient revealed that all the parts of litterfall followed a clear annual cycle except branches. Mean total litterfall was calculated 1014.6±12.7 g m-2 year-1 for H. fomes, 1047.3±21.3 g m-2 year-1 for X. mekongensis and 1640.2±14.1 g m-2 year-1 for B. sexangula of which leaves litterfall contributed more than 50% of total litterfall for all the three species. H. fomes, B. sexangula and X. mekongensis none of them exhibit any correlation between stipules litterfall and reproductive organs litterfall.ConclusionThe findings may contribute to an understanding of vegetative and reproductive phenology, litterfall production, and carbon sequestration rate of the major mangrove species in Sundarbans mangrove forests, and also its role in global C budgets.

scholarly journals Nature and Periodicity of Growth Rings in two Bangladeshi Mangrove Species

IAWA Journal ◽  
2008 ◽  
Vol 29 (3) ◽  
pp. 265-276 ◽  
Author(s):  
Md. Qumruzzaman Chowdhury ◽  
Nele Schmitz ◽  
Anouk Verheydens ◽  
Ute Sass-Klaassen ◽  
Nico Koedam ◽  
...  
Keyword(s):  
Tree Ring ◽  
Vessel Diameter ◽  
Tree Age ◽  
Mangrove Forests ◽  
Growth Rings ◽  
Mangrove Species ◽  
Forest Reserve ◽  
Complex Interactions ◽  
Heritiera Fomes ◽  
The Sundarbans

Nature and periodicity of growth rings were investigated in Sonneratia apetala and Heritiera fomes, two Bangladeshi mangrove species. From both species we collected three stem discs in the natural forest reserve of the Sundarbans. In addition, three discs were sampled from plantation- grown S. apetala trees of known age. Sanded stem discs revealed distinct growth rings but no periodic fluctuations in vessel variables (vessel density, vessel diameter, vessel grouping), which were measured at high resolution along a transect from pith to bark. The number of growth rings in plantation-grown S. apetala trees corresponded with the documented tree age, hence strongly suggesting the growth rings to be annual. Within species, the annual nature of the rings was further supported by a good match between the tree-ring series. The similar mean curves of S. apetala and H. fomes, growing at the same site in the Sundarbans, pointed to the presence of an external factor influencing their growth. A combination of precipitation and temperature was suggested influencing substrate salinity and phenological events. It became evident that tree-ring research in combination with the analysis of vessel patterns is a valuable tool to further investigate the complex interactions between tree growth and site ecology in mangrove forests.

scholarly journals Phenology and litterfall production of Bruguiera sexangula (Lour.) Poir. in the Sundarbans mangrove forests, Bangladesh

2019 ◽  
Vol 15 (3) ◽  
pp. 165-172 ◽  
Author(s):  
Md. Kamruzzaman ◽  
Sumonta K. Paul ◽  
Shamim Ahmed ◽  
Md. Salim Azad ◽  
Akira Osawa
Keyword(s):  
Mangrove Forests ◽  
Litterfall Production ◽  
Sundarbans Mangrove ◽  
The Sundarbans

scholarly journals Dictyota adnata Zanardini (Phaeophyceae) - A new record from the Sundarbans mangrove forests, Bangladesh

2020 ◽  
Vol 49 (2) ◽  
pp. 407-412
Author(s):  
Md Ariful Islam ◽  
Md Rashedul Islam ◽  
Abdul Aziz ◽  
Lawrence M Liao
Keyword(s):  
Brown Alga ◽  
New Record ◽  
Clayey Soil ◽  
Mangrove Forests ◽  
Mangrove Plants ◽  
Sundarbans Mangrove ◽  
The Sundarbans

Samples were collected from Arpangasia and Kholpetua rivers within the Sundarbans in Bangladesh during February to March and December 2018. Among several forms was found a tightly prostrate brown alga occurring on moist parts of mangrove plants and clayey soil. Flattened brownish thalli tightly attached to pneumatophores and lower parts of mangrove trunks, spreading and branching dichotomously, sometimes overlapping and attached by means of unbranched marginal and sub-marginal rhizoids were collected. Distinct marginal sori are well developed in fertile specimens. On the basis of these characters, the sample has been identified as Dictyota adnata Zanardini which is herein reported as a new record for Bangladesh.

scholarly journals Using Continuous Change Detection and Classification of Landsat Data to Investigate Long-Term Mangrove Dynamics in the Sundarbans Region

2019 ◽  
Vol 11 (23) ◽  
pp. 2833 ◽  
Author(s):  
Katie Awty-Carroll ◽  
Pete Bunting ◽  
Andy Hardy ◽  
Gemma Bell
Keyword(s):  
Climate Change ◽  
Change Detection ◽  
Mangrove Forest ◽  
Mangrove Forests ◽  
Landsat Data ◽  
Continuous Change ◽  
Sea Levels ◽  
Heritiera Fomes ◽  
The Sundarbans

Mangrove forests play a global role in providing ecosystem goods and services in addition to acting as carbon sinks, and are particularly vulnerable to climate change effects such as rising sea levels and increased salinity. For this reason, accurate long-term monitoring of mangrove ecosystems is vital. However, these ecosystems are extremely dynamic and data frequency is often reduced by cloud cover. The Continuous Change Detection and Classification (CCDC) method has the potential to overcome this by utilising every available observation on a per-pixel basis to build stable season-trend models of the underlying phenology. These models can then be used for land cover classification and to determine greening and browning trends. To demonstrate the utility of this approach, CCDC was applied to a 30-year time series of Landsat data covering an area of mangrove forest known as the Sundarbans. Spanning the delta formed by the confluence of the Ganges, Brahmaputra and Meghna river systems, the Sundarbans is the largest contiguous mangrove forest in the world. CCDC achieved an overall classification accuracy of 94.5% with a 99% confidence of being between 94.2% and 94.8%. Results showed that while mangrove extent in the Sundarbans has remained stable, around 25% of the area experienced an overall negative trend, probably due to the effect of die-back on Heritiera fomes. In addition, dates and magnitudes of change derived from CCDC were used to investigate damage and recovery from a major cyclone; 11% of the Sundarbans was found to have been affected by Cyclone Sidr in 2007, 47.6% of which had not recovered by mid-2018. The results indicate that while the Sundarbans forest is resilient to cyclone events, the long-term degrading effects of climate change could reduce this resilience to critical levels. The proposed methodology, while computationally expensive, also offers means by which the full Landsat archive can be analyzed and interpreted and should be considered for global application to mangrove monitoring.

Assessing Good Governance in Protected Areas (PA) Co-management: A Case Study of the Sundarbans Mangrove Forests of Bangladesh

2021 ◽  
pp. 1-25
Author(s):  
Abdus Subhan Mollick ◽  
Milton Roy ◽  
Nabiul Islam Khan ◽  
Wasiul Islam ◽  
Nazmus Sadath ◽  
...  
Keyword(s):  
Protected Areas ◽  
Good Governance ◽  
Mangrove Forests ◽  
Sundarbans Mangrove ◽  
The Sundarbans

scholarly journals Litterfall production, decomposition and nutrient accumulation in Sundarbans mangrove forests, Bangladesh

2019 ◽  
Vol 15 (1) ◽  
pp. 24-32 ◽  
Author(s):  
Md. Kamruzzaman ◽  
Kalayan Basak ◽  
Sumonta K. Paul ◽  
Shamim Ahmed ◽  
Akira Osawa
Keyword(s):  
Mangrove Forests ◽  
Nutrient Accumulation ◽  
Litterfall Production ◽  
Sundarbans Mangrove

scholarly journals Scratches on our sovereignty?

2021 ◽  
Vol 11 (1) ◽  
pp. 1-20
Author(s):  
Jayashree Vivekanandan
Keyword(s):  
Protected Area ◽  
Social Sustainability ◽  
Popular Sovereignty ◽  
Mangrove Forests ◽  
The Social ◽  
Conservation Politics ◽  
Political Act ◽  
Transboundary Protected Area ◽  
Sundarbans Mangrove ◽  
The Sundarbans

English Abstract: The article critically examines the conservation politics in a transboundary protected area (TBPA) in South Asia, the Sundarbans mangrove forests in Bangladesh and India. It explores the reasons why, despite collaborative measures by the two states, conservation has largely tended to conform to sovereignty practices, making it top-down and exclusionary. This makes the very demarcation of territory for protected areas an intensely political act with significant implications for social equity. The article examines the cultural politics of conservation since contestations to state power have often entailed the articulation of popular sovereignty in the Sundarbans. It argues that the social sustainability of conservation will critically hinge on how issues of resource access and governance are framed, negotiated, and addressed.Spanish Abstract: El artículo examina críticamente la política de conservación en el Área Protegida Transfronteriza (APT): los Sundarbans en Bangladesh e India. Explora por qué, a pesar de la colaboración bilateral, la conservación ha tendido en gran medida a ajustarse a prácticas de soberanía vertical y excluyente. La sola demarcación territorial de las APT, se convierte en un fuerte acto político con implicaciones signifi cativas en la equidad social. El artículo examina la política cultural de la conservación, ya que las protestas al poder del Estado a menudo tienen implicaciones en la articulación de la soberanía popular en los Sundarbans. Argumenta que la sostenibilidad social de la conservación dependerá fundamentalmente de cómo se enmarquen, negocien y aborden las cuestiones de acceso a los recursos y su gobernanza.French Abstract: L’article analyse de manière critique la politique de conservation dans une aire protégée transfrontalière (APT) en Asie du sud, la forêt des mangroves des Sundarbans au Bangladesh et en Inde. Il explore les raisons pour lesquelles, malgré les instruments de coopération entre les deux États, la conservation a adopté des pratiques de souveraineté étatique qui l’ont rendue erticale et exclusive. La démarcation du territoire des aires protégées est un acte profondément politique qui a des implications en matière d´égalité sociale. L’article examine la politique de conservation à travers des actes contestaires vis-à-vis du pouvoir étatique qui ont souvent favorisé une articulation de la souveraineté populaire dans les Sundarbans. Il met en évidence que la durabilité sociale de la conservation dépend de l’encadrement, de la négociation et de la promotion des thèmes d’accès aux ressources et de la gouvernance.

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