Global Ocean Environment News from Cyprus underwater sciences
Invasive Alien Species in the
East Mediterranean Coast and Global Warming
Extensive use of fossil fuels and deforestation has
contributed substantially towards global warming and climate change. The climate
change caused by global warming is significantly higher than pre- industrial
period. The sea level has been increasing at a rate of 2mm per year since 1990.
Floods and droughts have become more common. The number of invasive aquatic
species is increasing year after year. Alien specimen that arrives in a new
habitat may die, survive with little environmental impact or harm the naturally
existing species in many ways. A recent study shows that east Mediterranean
coast has been invaded by hundreds of alien species recently.
Pollution, over exploitation of resources, destruction of
habitats of native species and climate change contribute towards biodiversity
loss. However, the main threat is from marine invasive species. Marine habitats
populated by various species of plants, animals and microorganisms were
separated by natural barriers. Shipping, air travel and other means of transport
have overcome these barriers, making alien species moving into new habitats.
Marine scientist Stefan Kalogirou at the University of
Gothenburg stated that it is virtually impossible to eradicate these alien
species in the east Mediterranean coast. Reports show that these species come
from various coastal environments and has caused several problems to indigenous
species and ecosystem. A research study made on the structure and function of
fish in the sea grass meadows and sandy bottoms provide some significant insight
into the invasion of alien species. The research also shows how they create an
impact in the food chain of these species.
Pufferfish is one among the many alien species that have
been discovered recently. It is highly poisonous. The toxin of the pufferfish
can cause muscle paralysis that can contribute to respiratory arrest.
In some cases, it can cause death. Studies made on Mediterranean coastal regions
reveal that the pufferfish has become dominant and can cause significant impact
on the ecology. As they have established themselves well in the Mediterranean
region, it is very difficult or rather impossible to get rid of them.
The invasion of marine allochthonous species in the
Mediterranean is unalterable. Invasive alien species like the red algae and the
green algae have colonized large sheathes of the basin. Invasive fish species
like marine gastropod mollusk leachi and scyphozoan jellyfish cause real trouble
to fishermen, power station operators in the east Mediterranean coast. Alien
invertebrates also arrive in the Mediterranean. The Suez Canal has been the
major route for the invasion of these species. These species pose a threat to
the biodiversity of the marine ecosystem in this region. Water warming and
development of trade are the main contributing factors for the steady increase
of these alien species.
The alien species that have now settled in east
Mediterranean region represent a danger for human health and local economy. The
jellyfish that entered the Mediterranean in 1970s via Suez Canal causes painful
burns to people who swim here. They have invaded some beaches in groups causing
a lot of havoc.
summary report written and review by Doctor Stavros
Kaniklides ocean scientist
Marine Protected Areas (MPAs)
its A Must In Cyprus Coastline
Marine protected areas are those where human activities are
restricted to protect the natural environment, water and the marine ecosystem.
Cyprus Coastline is one of the most important regions that is included on the
marine protected areas list.
Cyprus Coastline extends to approximately 772km. Located in
the middle of Levantine basin, Cyprus is characterized by its level of endemism.
The temperature regime and salinity of surface water is higher than what it is
in the remaining coastlines along the Mediterranean. This is one reason why it
has a relatively high diversity of species. The warm waters of this region and
coastal zone support turtle nesting on beaches. The water in this area is clear
due to its oligotrophic nature and photosynthesis that happens deep below.
Factors affecting the Marine Biodiversity of Cyprus
Cyprus has a range of features to support higher level of
marine biodiversity. However, many factors pose a threat to it.
- Fishing and Overfishing
Overfishing with trawlers in shallow waters contribute towards the
environmental degradation and affects the biodiversity of Cyprus Sea. The
rapid growth in the demand for fish and fish products increase the price of
fish that apparently attracts many fishery investments. If over fishing
continues, more species of fish in Cyprus will be exploited or depleted.
This is one of the major reasons why marine protected areas are a must in
Tourism is the major sector fueling the economy of Cyprus. However, tourism
development of this coastal zone has created a great impact on the marine
habitat and species that depend on the zone like ghost crabs, turtles and
Pollution is one of the major factors affecting the marine biodiversity of
Cyprus. Chemicals and enrichment of sea waters with organic matter lead to
eutrophication. Eutrophication resulting from nutrients and use of
fertilizers encourage the growth of phytoplankton, toxic algae and blooms of
nuisance. This depletes the level of oxygen in water and makes alterations
in the composition of various species.
- Migration of Lessepsian
Lessepsian migration is the continuous migration of marine species from the
Suez Canal to the Mediterranean Sea. These invasive species have been
creating serious impact on the marine ecosystem not only in Cyprus, but also
in the complete Mediterranean region.
Cyprus coastline is diverse. From ragged rocky shorelines
to steep inaccessible cliffs and gentle sandy beaches, the coastline has a
variety of characteristics. The diverse nature of the coastline along with
various factors like wave exposure and geology has resulted in the existence of
numerous habitats that support various plant and animal species. The sandy
beaches support ghost crab population, while the rocky shores are the habitats
of the endangered east Mediterranean Cowry. Top shells of various species,
limpets and winkles can be found here. Various species of seaweeds are found in
pools and crevices in the rocky shores. About ten kilometers of Cyprus
coastline were declared as a reserve in the year 1989 for conserving turtles.
Declaring the entire coastline as marine protected areas can help preserve
marine biodiversity in this region.
summary report written and review by Doctor Stavros
Kaniklides ocean scientist
Sea Level Rise in the East
Sea level in the east Mediterranean Coast has been observed
since 1920. The main purpose of this study is to determine whether the sea level
has increased or not. A rise in sea level indicates the need for coastline
protection and a need to take action against possible intrusion of seawater into
freshwater regions. The study shows that the sea level has increased
significantly in the east Mediterranean coast, as compared to the sea level that
prevailed in 1970s. In addition to global warming, changes in precipitation
pattern and frequent occurrence of severe weather events, sea level rise is also
considered to be the most devastating consequences of global warming and climate
Reasons for Sea Level Rise in the East Mediterranean
Thermal expansion as an outcome of global warming is the
main reason for increase in the sea level in the eastern Mediterranean. Melting
glaciers is yet another significant reason for increase in the sea level. Human
activities like increased use of fossil fuel and cutting down trees in large
numbers contribute to ocean warming and sea level changes.
Many scientists agree that global warming pose a serious
threat to the environment. From the melting of the ice cap to the loss of coral
reefs, the effects of global warming are clear. Thermal expansion has already
increased sea levels between 4 and 8 inches.
Due to varied human pressures, many coastal areas are
already facing severe environmental problems like pollution, coastal erosion and
degradation of dunes. Sea level rise will increase the stress on these regions
by causing flooding, eroding sandy beaches and destructing coastal wetlands.
They will also pose threats to bridges, docks, jetties, coastal roads and
waterfront properties. Intrusion of saltwater could contaminate groundwater,
causing hazardous wastes and landfills.
Sea level rise in the east Mediterranean coast could lead
to the loss of around 50% of the sandy shore by 2050. If the sea level continues
to increase, it will eat up to 70% of the area by 2100. These estimates would
have serious social and economic consequences for the tourism sectors in the
eastern Mediterranean regions, where beach is the main part of the resource.
Sea level rise can cause devastating effect like flooding.
Coastal cities in the Mediterranean region are under direct risk of flooding.
Tourist resorts, ports, agricultural land and coastal wetland are also under
risk. However, some parts of the ecosystem of the wetlands in this region will
not be destroyed, as they adapt to sea level rise. The richness of the species
living in this region is more likely to reduce due to unfavorable new
Sea level rise can cause alterations in the shoreline that
include the possibility of losing the natural protective barriers. This again
could increase the risk of flooding in coastal cities. When the sea level
increases, strong and powerful storm will surge and cause serious threat to the
coastal areas. Studies show that coastal zones affected by storm surges would be
substantially more, if the sea level continues to rise at this rate.
summary report written and review by PhD, Dr. Stavros Kaniklides Marine scientists
Δρ. Σταύρος Κανικλίδης
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