Skip to main content

Causes of Coral Threats

Coral bleaching is a process which causes loss of vivid colours from coral organisms & turns them white due to expulsion of symbiotic zooxathellae algae.
A host of factors are responsible for coral bleaching from local to regional & global levels. It is to remember that coral bleaching occurs when coral animals & their symbiotic zooxathellae alga are separated from each other. The following factors are held responsible for coral bleaching at different levels & scales-
Global Factors:
  1. Global Warming: The rise in normal temperature of seawater due to anthropogenic factors i.e. global warming. Now a days, Global warming as the most significant factor of coral bleaching causing large scale coral death.
  2. El-Nino-Southern Oscillation: ENSO phenomena are responsible for coral degradation at global levels.
  3. Solar Irradiance: Coral bleaching occurs due to increased solar irradiance(Photosynthetically active radiation & Ultraviolet band light.) 
  4. Sedimentation: Increased sedimentation due to slit runoff resulted coral bleaching
  5. Outbreak of Diseases & Epidemics: The following diseases have been identified to cause coral bleaching in different regions of seas:
Ø  Black band disease,
Ø  Coral plagues such as white plague,
Ø  Yellow band disease,
Ø  White band disease, discovered in 1996,
Ø  White pox, discovered in 1996,
Local & Regional Factors:
  1. Overfishing: Destructive fishing practices & overfishing are responsible for coral degradation at local & regional levels.
  2. Pollution: Pollution of sea waters caused by industrial effluents, urban sewage & oil slicks are responsible for coral degradation.
  3. Mining: Mining of coral rocks for building materials are responsible for coral degradation.
  4. Clearing Marine Forest: Clearing of marine forests around coral reef are responsible for coral degradation.
  5. Collection of  Coral Species: Collection of coral species are also responsible for coral degradation.

‹Model of Coral Bleaching Factors:

Labels

Labels:

Comments

Post a Comment

Popular posts from this blog

Behaviouralism in geography

Behaviouralism Behaviouralism is an approach in human geography that came to prominence in the human geography of the 1960s and 1970s. It goes out of the idea that people are the determining factor in the explanation of space. Behaviouralism tries to give an explanation of the spatiallity of human activities. And thereby they use a complex universally applicable model.  Definition of Behaviouralism: The particular aspect with which geographical content is analyzed using mathematical statistics & human sensitivity, is called behavioralism. Concept of Behaviouralism: The Behaviouralism revolution is a theoretical concept. Its theories are not based on assumptions, but are actually explored through ascending methods based on the experience of human behavior. An analysis of the significance of geographical issues in behavioral perspectives within a system, so therefore is no definite boundary to behavioral geography. The main purpose of behaviouralism geography is to in...
Post a Comment
Read more

Deep-Ocean Basin

Abyssal Plain:  Abyssal plains is an underwater plain on the deep ocean floor, usually found at depths between 3000 metres & 6000 metres. Characteristics: a)       Abyssal plain is the most extensive relief zone of the ocean floor. b)      The average slope gradient is almost 0.5ᵒ. c)       It covers nearly 40% of the ocean floor. d)      It is flat & rolling submarine plain. Abyssal Hill:  Abyssal hills a small hill that rises from the floor of an abyssal plain. Characteristics: a)       Covering more than 30% of the ocean floor. b)      Height of this hill is less than 100m. Seamounts: Seamounts is an volcanic projections that developed above the abyssal plains that do not rise above the surface of the sea. Characteristics: a)       Seamounts are circular or elliptical. b) ...
Post a Comment
Read more

Concentric zone theory

Theories of City Structure-Concentric Zone Theory Introduction: The Concentric or Zonal Theory of urban landuse was first proposed in 1923 by E.W. Burgess. He was a sociologist. The idea behind the concentric model is that the development of a city takes place outwards from its central area in a series of concentric circles to form zones.  Assumption:        i.           Cultural & social heterogeneity of the population.       ii.           Commercial-industrial base to the economy of the city.     iii.           Private ownership of property & economic competition for space.     iv.           Expanding area & population of the city.       v.    ...
Post a Comment
Read more