There is increasing concern on wetlands and associated studies due to its significant role in protection the coastline from hurricanes and storms. You may find some useful knowledge and syntheses from the books as below

Wetlands by Spray, Sharon L; McGlothlin, Karen L. (Karen Leah)

and 

Wetlands by Mitsch, William J; Gosselink, James G.

Please have a look at these links.

http://www.sciencedirect.com/science/article/pii/S221458181400010X

http://bioscience.oxfordjournals.org/content/59/1/39.full

https://www.researchgate.net/publication/27281375_Biodiversity_in_Wetlands_Assessment_Function_and_Conservation

https://www.researchgate.net/publication/238087971_Conservation_of_wetlands_of_India_-_A_review

https://www.researchgate.net/publication/273447310_Wetland_ecogenomics_-_the_next_generation_of_wetland_biodiversity_and_functional_assessment

https://www.researchgate.net/publication/222314102_Wetland_creation_in_agricultural_landscapes_Biodiversity_benefits_on_local_and_regional_scales

https://www.researchgate.net/publication/228409259_Wetlands_of_Kerala

Article Biodiversity in wetlands: assessment, function and conservat...

Article Conservation of wetlands of India - A review

Article Wetland ecogenomics-The next generation of wetland biodivers...

Article Wetland creation in agricultural landscapes: Biodiversity be...

Article Wetlands of Kerala

Please check these PDF attachments also.

Please check these articles also.