نتایج جستجو برای: mangrove forests

تعداد نتایج: 46368  

2011
Douglas J. Pool

Structural parameters of mangrove forests were measured at seven geographical locations in Florida (U.S.A.), Puerto Rico, Mexico, and Costa Rica. One-tenth hectare plots were subdivided into twenty 5 x 10 m plots where all individuals greater than 2.5 cm DBH were measured and recorded. Height of the tallest tree in each plot was measured. The complexity index developed by Holdridge (1967) as an...

Journal: :جنگل و فرآورده های چوب 0
بیت الله محمودی استادیار گروه جنگلداری دانشکدة منابع طبیعی و علوم زمین دانشگاه شهرکرد، شهرکرد، ایران احمد بازگیر دانشجوی دکتری جنگلداری دانشکدة کشاورزی دانشگاه لرستان، خرم آباد، ایران جهانگیر فقهی دانشیار گروه جنگلداری و اقتصاد جنگل دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران فاطمه جعفری کارشناس ارشد مدیریت کشاورزی دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

one of the indicators of management and sustainability control of forest resources is the definition deforestation and degradation types. these factors hazard quantitative and qualitative of the iranian forests. in this study with integrated approach, different forms of forest degradation identified in the forest areas with a reviews of library resources and then investigation the degree of sta...

2014
Amanda G. DelVecchia John F. Bruno Larry Benninger Marc Alperin Ovik Banerjee Juan de Dios Morales

Mangroves can capture and store organic carbon and their protection and therefore their restoration is a component of climate change mitigation. However, there are few empirical measurements of long-term carbon storage in mangroves or of how storage varies across environmental gradients. The context dependency of this process combined with geographically limited field sampling has made it diffi...

Journal: :Remote Sensing 2015
Aurélie C. Shapiro Carl C. Trettin Helga Küchly Sadroddin Alavinapanah Salomão Bandeira

Mangroves are recognized for their valued ecosystem services provision while having the highest carbon density among forested ecosystems. Yet they are increasingly threatened by deforestation, conversion to agriculture and development, reducing the benefits they provide for local livelihoods, coastal protection and climate change mitigation. Accordingly, accurate estimates of mangrove area and ...

2014
Judith A Okello Elisabeth M R Robert Hans Beeckman James G Kairo Farid Dahdouh-Guebas Nico Koedam

Sedimentation results in the creation of new mudflats for mangroves to colonize among other benefits. However, large sediment input in mangrove areas may be detrimental to these forests. The dynamics of phenological events of three mangrove tree species (Avicennia marina, Ceriops tagal, and Rhizophora mucronata) were evaluated under experimental sediment burial simulating sedimentation levels o...

2008
Steven Bouillon Alberto V. Borges Edward Castañeda-Moya Karen Diele Thorsten Dittmar Norman C. Duke Erik Kristensen Shing Y. Lee Cyril Marchand Jack J. Middelburg Victor H. Rivera-Monroy Thomas J. Smith Robert R. Twilley

[1] Mangrove forests are highly productive but globally threatened coastal ecosystems, whose role in the carbon budget of the coastal zone has long been debated. Here we provide a comprehensive synthesis of the available data on carbon fluxes in mangrove ecosystems. A reassessment of global mangrove primary production from the literature results in a conservative estimate of 218 ± 72 Tg C a . W...

2007
Nagamitsu Maie Oliva Pisani Rudolf Jaffé

We describe the fate of mangrove leaf tannins in aquatic ecosystems and their possible influence on dissolved organic nitrogen (DON) cycling. Tannins were extracted and purified from senescent yellow leaves of the red mangrove (Rhizophora mangle) and used for a series of model experiments to investigate their physical and chemical reactivity in natural environments. Physical processes investiga...

Journal: :Current Biology 2005
Ellouise Leadbeater Lars Chittka

populations in and around coastal lagoons. Curr. Biol. 15, 579–586. 10. Kairo, J.G., Dahdouh-Guebas, F., Gwada, P.O., Ochieng, C., and Koedam, N. (2002). Regeneration status of mangrove forests in Mida Creek, Kenya: a compromised or secured future? Ambio 31, 562–568. 11. Foell, J., Harrison, E., and Stirrat, R.L. (1999). Participatory approaches to natural resource management the case of coasta...

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