Assessment of climate change and its environmental consequences of posidonia coastal distribution, case study [electronic resource]: Garawla islands village at north west coast of Egypt

Includes bibliographic reference

Seagrass wrack is considered as one of the
environmental problems facing the Egyptian
North West coastal zone. The wrack in the
Mediterranean coast of Egypt is composed mainly
from Posidonia oceanica. Its distribution is
scattered at different sites along the Mediterranean
beaches. The aim of this work is to study Posidonia
wrack as one of the environmental problems in
the Egyptian North west coast. Garawla Islands
Village was selected as case study to investigate
the Posidonia wrack because it considered as a
serious ecological, social and economic issue.
The present study assesses the environmental
factors affecting its distribution and its relation
with climate change and the possible way of
control. The standard approach for comparing
beach litter pollution has been used to assess of
the beaches under investigation based on field
trip data and satellite images. The average values
and its standard deviation of precipitation, wind
speed, relative humidity and solar intensity
during 2013 were 0.24±1.64 mm, 4.41±1.34
m/s, 0.58±0.13 fractions and 21.59±7.47 MJ/m2,
respectively. Temporal variation of the climatic
conditions with coastal plants near the study area
were investigated through three years (1997, 2005
and 2013). This indicated that the distribution of
Posidonia at the coastal area is correlated with the
environmental conditions. Also, the distribution of
Posidonia wrack is dependent on the topography
of the shoreline. The direction of dead Posidonia
movements is highly affected by the climatic
conditions. The study recognized the sites of
accumulated Posidonia wrack. Recommendations
to use special net to control this coastal problem
have been suggested.

Summary in Arabic