Testing patterns of zonation in mangroves: scale dependence and environmental correlates in the Sundarbans of Bangladesh
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In this article, the authors used statistical methods to examine tree species distribution patterns in relatively undisturbed regions of the Sundarbans of Bangladesh and tested the hypothesis that mangroves occur in discrete zones with respect to elevation.Abstract:
Summary1 Associations between abiotic variables and patterns of species distribution and abundance are a major preoccupation of community ecologists. In many habitats, this association is manifest in discrete zones of vegetation.
2 We used statistical methods to examine tree species distribution patterns in relatively undisturbed regions of the Sundarbans of Bangladesh. We tested the hypothesis that mangroves occur in discrete zones with respect to elevation. These data were gathered with explicit attention to local and regional differences in edaphic characteristics so that species-environment relationships could be analysed at several spatial scales.
3 Correlations were also assessed between mangrove species composition and edaphic variables that co-vary with elevation, i.e. salinity, field capacity, cation exchange capacity, percentage silt, and mangrove physiognomic category (slope, basin, levee and flat).
4 Quantitative statistical analysis using randomization techniques failed to detect species zonation along any of 33 individual 200-m transects, within 1-km2 blocks, or within 1200-km2 regions.
5 Canonical correspondence analysis relating edaphic variables to species distributions accounted for a total of only 24% of the variance in species composition.
6 Our data suggest that the absence of zonation in the Bangladesh Sundarbans reflects the underlying biology of the system and is not an artefact of long-term human disturbance.read more
Citations
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Book ChapterDOI
Biology of mangroves and mangrove Ecosystems
TL;DR: Mangroves are woody plants that grow at the interface between land and sea in tropical and sub-tropical latitudes where they exist in conditions of high salinity, extreme tides, strong winds, high temperatures and muddy, anaerobic soils, creating unique ecological environments that host rich assemblages of species.
Journal ArticleDOI
The Loss of Species: Mangrove Extinction Risk and Geographic Areas of Global Concern
Beth Polidoro,Kent E. Carpenter,Lorna Collins,Lorna Collins,Norman C. Duke,Aaron M. Ellison,Joanna C. Ellison,Elizabeth J. Farnsworth,Edwino S. Fernando,Kandasamy Kathiresan,Nico Koedam,Suzanne R. Livingstone,Toyohiko Miyagi,Gregg E. Moore,Vien Ngoc Nam,Jin Eong Ong,Jurgenne H. Primavera,Severino G. Salmo,Severino G. Salmo,Jonnell C. Sanciangco,Sukristijono Sukardjo,Yamin Wang,Jean Wan Hong Yong +22 more
TL;DR: Across the globe, mangrove species found primarily in the high intertidal and upstream estuarine zones are the most threatened because they are often the first cleared for development of aquaculture and agriculture.
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Allometry, biomass, and productivity of mangrove forests: A review
TL;DR: In this article, the authors review 72 published articles to elucidate characteristics of biomass allocation and productivity of mangrove forests and also introduce recent progress on the study of MANGEO to solve the site and species-specific problems.
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Environmental drivers in mangrove establishment and early development: A review
Ken W. Krauss,Catherine E. Lovelock,Karen L. McKee,Laura López-Hoffman,Sharon M.L. Ewe,Wayne P. Sousa +5 more
TL;DR: In this paper, a review of the mangrove literature focusing on eco-physiological and growth constraints to the establishment and early development of seedlings in the intertidal zone is presented.
Journal ArticleDOI
Biodiversity and its conservation in the Sundarban Mangrove Ecosystem
Brij Gopal,Malavika Chauhan +1 more
TL;DR: The Sundarban is the habitat of many rare and endangered animals (Batagur baska, Pelochelys bibroni, Chelonia mydas), especially the Royal Bengal tiger (Panthera tigris) as mentioned in this paper.
References
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Journal ArticleDOI
Canonical Correspondence Analysis: A New Eigenvector Technique for Multivariate Direct Gradient Analysis
TL;DR: In this article, a new multivariate analysis technique, called canonical correspondence analysis (CCA), was developed to relate community composition to known variation in the environment, where ordination axes are chosen in the light of known environmental variables by imposing the extra restriction that the axes be linear combinations of environmental variables.
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The structure of lizard communities
TL;DR: The topic here is the structure of lizard communities in this somewhat loose sense of the word (perhaps assemblage would be a more accurate description), with emphasis on the niche relationships among such sympatric sets of lizard species, especially as they affect the numbers of species that coexist within lizard communities.
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The botany of mangroves
TL;DR: The aim of this work is to contribute to the human awareness of the natural world and to contribute towards the humanizing of nature.