This study investigated the impacts of natural and anthropogenic factors on the coastal water quality dynamics in the Island of Boracay, Malay, Aklan, Central Philippines particularly the effects of nutrient pollution on phytoplankton population. The samples were gathered at two month interval for a total of ve samplings by filtering 10 liter buckets of surface water through a net with 25μm mesh bag. There were 35 identified genera of phytoplankton belonging to four taxonomic groups. Diatoms had 26 genera, cyanophycean and silicoflagellate and dinoflagellates had one and seven genera, respectively. Diatoms were the dominant group with the highest mean density of 1,588 ind.L-l, followed by silico agellate at 399 ind.L-1 represented by Tintinnopsis, cynophycean was represented by Trichodesmium at 204 ind.L-1, while the dinoflagellates had 132 ind.L-l. Genera richness was high when N and P concentrations were relatively lower. Phytoplankton density was highest in Lugotan Cove and Long Beach where nutrients readings were relatively high. This research clearly demonstrated that the growth of Trichodesmium reaching carrying capacity is an indication that the island ecosystem is near its ecological thresholds. The level of nitrate N acts as the limiting nutrient in the coastal water of the island controlling the growth of Trichodesmium and phytoplankton diversity. Changes in phytoplankton assemblages and density in the coastal waters were associated to variations on intensity and frequency of water mixing along with nutrient loading coming from anthropogenic activities and land uses in the island.
Keywords: diversity, phytoplankton, anthropogenic activities, Boracay Island, tourism
Socio-Economic Study of Two Major Metro Manila EsterosPhytoplankton Abundance and Distribution in Selected Sites of Boracay Island, Malay, Aklan, Central Philippines Water Quality and Nutrient Loading in the Coastal Waters of Boracay Island, Malay, Aklan, Central Philippines Valuing Public Preferences for Ludong (Cestraeus plicatilis Valenciennes 1836) Conservation Program in Cagayan River Systems, Philippines Damage Assessment and Recovery Monitoring of the Mangrove Forests in Calauit Island Affected by Typhoon Yolanda (Haiyan) Exploring Utility of Formal Concept Analysis Approach to Coral Reef Assessment Ecological Integrity of Pasonanca Natural Park: The Sustainability of Water Supply Under a Policy of Protected Areas
Comparison of Indigenous and Scientific Knowledge on Soil Classification among Farmers in Imugan, Nueva Vizcaya, PhilippinesWho Wants to Adopt Sustainable Charcoal Production?: Determinants and Willingness to Adopt Sustainable Practices Among Small-scale Producers in Quezon Province, Philippines Environmental Sustainability Analysis of Charcoal Production in Mulanay, Quezon, Philippines Mr. Mr. Mr. Mr. Mr. Mr.