The 7 Lakes of San Pablo City Research Project


This project has generated various researches and thesis for both undergraduate and graduate students work. The studies focused on water quality assessments which considered the physico-chemical analyses of the water, the identification of biological indicators to pollution, sediment analyses, phytoplankton inventory and colliform contamination. Other than water quality assessments, are researches on nutrient availability and dispersion, bathymetry and soil analyses. The impacts of aquaculture being a major livelihood program of the lake shore communities, domestic and agricultural activities are  studied and correlated with the sustainability of the lakes.   The ES Department has actively adopted the lakes not only as research areas by also for social service and extension work with emphasis on community development through information dissemination. Recent collaborative work with the Ateneo Innovation Center looked into the use of solar-powered temperature and dissolved oxygen sensors to immediately identify changes in water quality. The set up provided an early warning system for the fisherfolks on the occurrence of a fish kill in the lake.

Aquaculture of tilapia though the use of fish cages is regulated by the Laguna Lake Development Authority (LLDA) in close coordination with the FARM C and the local government units.  Regular water quality monitoring is done to assess water quality deterioration as impacted  by the fish cages and other anthropogenic activities aside from social and economic development programs.

Representative Publications

Perez, T. 2009. Lake Shore Community of Lake Palacpaquen. Agenda for Hope. (Dayrit, ed.). Ateneo de Manila University Press. Loyola Heights, Philippines

Claveria RJR , Perez TR, Tesorero JKV , Pasaporte BJD and Bayugo GMS , 2007, Petrographic analysis of rocks and sediments around the seven lakes of San Pablo, Laguna: implications regarding sulfate distribution and provenance, The Loyola Schools Review, 6, pp 64-77.

Claveria RJR , Severino GAJ and Perez TR, 2008, Bathymetry and sedimentation in Palacpaquen Lake, San Pablo City,Laguna, Philippines, The Loyola Schools Review, 7, pp 73-85.

Perez T.,  E. Enriquez; R. Guererro; D. Simon and F. Schiemer. 2008. Catchment characteristics, hydrology, limnology and socio-economic features of Lake Taal, Philipines.  Aquatic Ecosystems and Development : Comparative Asian Perspectives. Schiemer et al. (eds). Margraf Publishers. Germany.

Caasi H, dela Torre JB, Perez TR and Claveria RJR , 2007, An assessment of the benthic community structure: Implications on the integrity of Lake Palacpaquen, San Pablo City, Philippines, Transactions of the National Academy of Science and Technology, 29, p 69.

Claveria RJR , Perez TR, Unson JRS , Roque JT, Bayugo GMS and Aquino JB , 2006, Preliminary assessment of land use and water quality of some lakes in San Pablo, Laguna, Philippines, Transactions of the National Academy of Science and Technology, 28, p 41.

Enriquez, E. and T. Perez. 2005. Response of Phytoplankton to Temporal Changes in Nutrinets in Taal Lake, Batangas, Philippines. Proceedings of the First National Congress on Philippine Lakes (LakeCon 2003). (Cuvin-Aralar et al. eds.) SEAMEO SEARCA, Laguna, Philippines.  

Pasaporte BJD, Ochavo KGC, Claveria RJR, Perez JMD, Perez TR and Unson JRS (2005), Nutrient dispersion patterns in soils and sediments: A study of sourcing in selected lakes in San Pablo, Laguna, Philippines, In Proceedings 9th Zonal R and D Review (Southern Luzon Zonal Center for Aquatic and Marine R and D)

Claveria RJR, Perez TR, Unson JRS, Roque JT, Bayugo GMS and Aquino JB (2006), Preliminary assessment  of land use and water quality of some lakes in San Pablo, Laguna, Philippines,  In Abstracts of Papers, 28th NAST Annual Scientific Meeting, Transactions of the National Academy of Science and Technology (ISSN 0115-88-48), Volume 28, No. 1.


Contact Information

Teresita R. Perez, Ph.D.
Rene Juna R. Claveria, Ph.D.
Emilyn Q. Espiritu
Jewel Racquel S. Unson
Department of Environmental Science

Office Address: 3rd Floor Manila Observatory


Telephone: +632.426.6001 loc. 5650
Fax: +632.426.432