نتایج جستجو برای: mangrove

تعداد نتایج: 7930  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Catherine G McNally Emi Uchida Arthur J Gold

Protected areas are used to sustain biodiversity and ecosystem services. However, protected areas can create tradeoffs spatially and temporally among ecosystem services, which can affect the welfare of dependent local communities. This study examines the effect of a protected area on the tradeoff between two extractive ecosystem services from mangrove forests: cutting mangroves (fuelwood) and h...

2016
Daobo Wang Wei Huang Ruwen Liang Fusheng Li

BACKGROUND Since Spartina alterniflora (simplified as Spartina) has strong ecological competitiveness and rapid growth, it has been introduced and living in the coastal wetland regions of China for more than 30 years. Taking coastal wetland in the Beibu Gulf of south China as an example, the effects of Spartina invasion on soil quality were investigated to provide scientific basis for soil mana...

2009
LE WANG WAYNE P. SOUSA

As a first step in developing classification procedures for remotely acquired hyperspectral mapping of mangrove canopies, we conducted a laboratory study of mangrove leaf spectral reflectance at a study site on the Caribbean coast of Panama, where the mangrove forest canopy is dominated by Avicennia germinans, Laguncularia racemosa, and Rhizophora mangle. Using a highresolution spectrometer, we...

Journal: :Remote Sensing 2015
Muhammad Kamal Stuart R. Phinn Kasper Johansen

Providing accurate maps of mangroves, where the spatial scales of the mapped features correspond to the ecological structures and processes, as opposed to pixel sizes and mapping approaches, is a major challenge for remote sensing. This study developed and evaluated an object-based approach to understand what types of mangrove information can be mapped using different image datasets (Landsat TM...

Background & Aim: Diabetes mellitus increases oxidative stress and results in the weakening of the antioxidant defense system. Leaves of mangrove (Avicennia marina) which have not been studied enough are rich in antioxidant compounds. This study was conducted to determine the effect of aqueous extract of mangrove leaves (Avicennia marina) on the antioxidant enzyme activities of ovarian tissue i...

2005
Chaichoke Vaiphasa

Mangroves, important components of the world’s coastal ecosystems, are threatened by the expansion of human settlements, the boom in commercial aquaculture, the impact of tidal waves and storm surges, etc. Such threats are leading to the increasing demand for detailed mangrove maps for the purpose of measuring the extent of the decline of mangrove ecosystems. Detailed mangrove maps at the commu...

2015
Gabriela Alfaro-Espinoza Matthias S. Ullrich

Mangrove forests are highly productive ecosystems but represent low nutrient environments. Nitrogen availability is one of the main factors limiting mangrove growth. Diazotrophs have been identified as key organisms that provide nitrogen to these environments. N2-fixation by such organisms was found to be higher in the mangrove roots than in surrounding rhizosphere. Moreover, previous studies s...

2010
H. Yanagisawa S. Koshimura T. Miyagi F. Imamura

[1] Since the 26 December 2004 Indian Ocean tsunami, the role of mangrove forests as natural defenses protecting coastal communities from tsunami disaster has been highlighted. However, some mangrove forests were destroyed by that tsunami. They are expected to have lost their protective functions. In this study, we develop a fragility function to assess the mangrove trees’ vulnerability, expres...

Journal: :Global change biology 2013
Michael J Osland Nicholas Enwright Richard H Day Thomas W Doyle

We live in an era of unprecedented ecological change in which ecologists and natural resource managers are increasingly challenged to anticipate and prepare for the ecological effects of future global change. In this study, we investigated the potential effect of winter climate change upon salt marsh and mangrove forest foundation species in the southeastern United States. Our research addresse...

2008
Eric L. Gilman Joanna Ellison Norman C. Duke Colin Field

Mangrove ecosystems are threatened by climate change. We review the state of knowledge of mangrove vulnerability and responses to predicted climate change and consider adaptation options. Based on available evidence, of all the climate change outcomes, relative sea-level rise may be the greatest threat to mangroves. Most mangrove sediment surface elevations are not keeping pace with sea-level r...

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