Work in progress...
My research focuses on advancing environmental sustainability through the study of water systems, ecosystem management, and biodiversity conservation in the Philippines. It integrates interdisciplinary approaches to address challenges related to water security, pollution, and sustainable resource use, with increasing emphasis on circular economy principles.
A major component of my work examines groundwater and freshwater systems. Through initiatives such as the Philippine Groundwater Health Index, I have developed tools for assessing water quality and ecosystem health, contributing to improved water conservation and management strategies.
I also investigate emerging environmental issues, particularly microplastic pollution in aquatic systems, including subterranean environments. My research examines its distribution, ecological impacts, and implications for sustainable waste management within a circular economy framework, with particular attention to how microplastics affect the health, population structure, and resilience of aquatic organisms.
In parallel, my research on cave and freshwater biodiversity in the Philippines examines ecosystem functioning and conservation in environmentally sensitive systems. I focus on cave-dwelling organisms such as cave fishes and cave crabs, investigating their taxonomy, population structure, and adaptive traits in extreme, resource-limited environments. By integrating morphological, molecular, and environmental DNA (eDNA) approaches, I aim to resolve species boundaries, detect cryptic diversity, and improve biodiversity monitoring in understudied subterranean habitats.
Additionally, I explore cave thermal spring extremophiles, focusing on microbial communities that thrive in extreme environments. These systems provide insights into metabolic adaptation, evolutionary processes, and biogeochemical cycling, while expanding our understanding of life under environmental extremes.
My research is supported by international collaborations and funded projects, and I actively engage with stakeholders to translate findings into policy and practice. Through an integrative framework that combines field surveys, molecular tools, ecological assessment, and sustainability science, my work contributes to the conservation and sustainable management of freshwater and cave ecosystems in the Philippines, linking biodiversity conservation with broader environmental and societal goals.
I have long been driven by a deep curiosity about the natural world, a fascination that began in childhood and ultimately led me to pursue a career in biology. I started my formal research career at the University of the Philippines’ Natural Sciences Research Institute (UP-NSRI), where I worked as a research assistant in the Microbiology and Ecology & Taxonomy Laboratories. During this time, I contributed to projects on the isolation and characterization of rhizobia from lahar-affected soils in the Mt. Pinatubo area, as well as the isolation, toxicity testing, and immobilization of green microalgae and cyanobacteria.
My graduate research focused on the biodiversity, taxonomy, and ecology of crustaceans in the Philippines. During my master’s studies, I investigated cavernicolous crabs, resulting in the discovery of several new species, and examined the colonization of anchialine caves using molecular approaches, particularly in the genus Discoplax. For my PhD, I expanded this work to include alpha taxonomy and molecular analyses of freshwater crabs, alongside water quality assessments and stable isotope analysis. By integrating geologic and paleoclimatic data, I addressed key questions in cave ecology, biogeography, and speciation, and developed a conceptual model of cave ecological dynamics that elucidates nutrient sources in subterranean aquatic systems. My work also demonstrated the impacts of human activities on groundwater quality using chemical and microbial indicators.
As a postdoctoral fellow at Yokohama National University, I examined anthropogenic impacts on karst systems in the Philippines, documenting groundwater contamination in disturbed areas and highlighting the connectivity between surface and subsurface ecosystems. I further advanced my taxonomic research during short-term fellowships at the National University of Singapore, where I described several new species from Philippine aquatic habitats. These include a new genus and species of cave-obligate false spider crab, Samarplax principe, which exhibits distinct morphological adaptations to subterranean environments.
I am interested in aquatic and cave ecology, phylogeny, biogeography and taxonomy of aquatic animals, environmental management and sustainability
Bio-mechanical filtration system (inside my office): mesocosm bioremediation project using ecological concept. Also applicable for sustainability and green building projects.
Pilot testing of bio-mechanical filtration system: bioremediation, rehabilitation and restoration project using ecological concept. Also applicable for sustainability and green building projects.
Corbicula Project in Laguna lake: age structure, density and growth rate (photos: team corby)
Laguna lake ecological assessment project: introduced and invasive species inhabitants.
Some of my innovations for research projects and class demonstrations: dome light for photography (v. 1 & v. 2), two-chambered trap for crustaceans and small fishes, grab sampler and micro-stimulator for neurons and muscles of cockroach leg.
I started exploring caves in the '90s