نتایج جستجو برای: coastal zone

تعداد نتایج: 161493  

2009
Steven Bouillon Rod M. Connolly

Tropical rivers provide about 60% of the global transport of organic and inorganic carbon from continents to the coastal zone. These inputs combine with organic material from productive mangrove forests, seagrass beds, and coral reefs to make tropical coastal ecosystems important components in the global carbon cycle. Carbon exchange has been measured over multiple spatial scales, ranging from ...

2004
Lisa Strain Abbas Rajabifard Ian Williamson

The coastal zone is a complex area, consisting of both the marine and terrestrial environments. It is also home for an increasing number of activities, rights and interests, and according to the UN Atlas of the Ocean 44% of the worlds population. Worldwide countries are realising the need to balance development and exploitation of resources in the coastal zone with environmental and social need...

2012
Caroline Sara Fortunato Byron C. Crump David L. Kirchman

Bacterioplankton communities are deeply diverse within and across environments, yet also display repeatable patterns over seasonal and annual time scales. I assessed patterns of bacterioplankton community variability across the Columbia River coastal margin over space and time. Coastal zones encompass a complex spectrum of environmental gradients, which impact the composition of bacterioplankto...

Journal: Pollution 2016

The present research article highlights the metal (Cd, Cu, Pb, Zn and Fe)distribution pattern in the RSPM generated in different hot spot sites located at Kochi, theQueen of Arabian Sea. These sampling sites are categorized under three different zonesas estuarine, riverine, and coastal. Two sampling phases are selected in order to check theconsistency in pollution trend after a two year gap and...

Journal: :ecopersia 2011
homayoun khoshravan somayeh rouhanizadeh

we measured the impacts of coastal modification on beach erosion and beach retreat conditions, selecting the miankaleh region as an example of a complex high-pressure free zone with high levels of engineering and tourism activity. nine sampling transects, stretching from the shoreline to a 10 meter depth, were defined and 36 sediment samples were collected from the sea bed at depths of 1, 3, 5,...

Journal: :Journal of Geophysical Research 2004

2008
Sheelan Vaez Abbas Rajabifard Ian Williamson

The coastal zone is a unique geologic, ecological and biological domain of vital importance to a vast array of terrestrial and aquatic life forms-including humankind. Managing the plethora of rights, restrictions and responsibilities of resources within the marine environment and at the littoral zone has created one of the world’s most complex areas of management. Evidently effective administra...

Journal: :Eos, Transactions American Geophysical Union 1999

Journal: :Journal of Marine Science and Engineering 2019

Journal: :international journal of environmental research 2014
c. shao y. guan c. chu r. shi m. ju

the “driving force - pressure - state - impact – response” modeling framework isadopted to consider the formation mechanisms of environmental risks and the requirements ofecological environment protection. moreover, a systematical index system and evaluation model forthe measurement of the coastal ecological security level is put forward in this paper to assess thestate of coastal ecological en...

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