A5000493938- Groundwater and Isotope Geochemistry
- Coral and Marine Ecosystems Studies
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Coastal and Marine Management
- Oceanographic and Atmospheric Processes
- Coastal wetland ecosystem dynamics
- Marine and coastal plant biology
- International Maritime Law Issues
- Geochemistry and Elemental Analysis
- Groundwater flow and contamination studies
- Fluoride Effects and Removal
- Land Use and Ecosystem Services
- Coastal and Marine Dynamics
- Radioactive contamination and transfer
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
University of Hawaiʻi at Mānoa
2010-2021
University of Hawaii System
2019
Generally unseen and infrequently measured, submarine groundwater discharge (SGD) can transport potentially large loads of nutrients other land-based contaminants to coastal ecosystems. To examine this linkage we employed algal bioassays, benthic community analysis, geochemical methods water quality parameters nearshore reefs adjacent a variety potential, nutrient sources on Maui. Three common reef algae, Acanthophora spicifera, Hypnea musciformis, Ulva spp. were collected and/or deployed at...
Maui, Hawaii, United States. We investigated connections between land uses and submarine groundwater discharge (SGD) nutrient fluxes to coastal waters of Hawai'i. Nutrient contributions from agricultural lands, wastewater injection, septic-cesspool systems were examined by combining a numerical model with δOH2O18, δNNO3−15, δONO3−18 modeling identify pathways, recharge elevations, nitrate sources. Fresh total SGD rates quantified using 222Rn mass balance modeling. Low + nitrite (N N) (24...
We optimize groundwater management in the presence of marine consequences submarine discharge (SGD). Concern for biota increases optimal steady‐state head level aquifer. The model is discussed general terms any coastal resource where SGD has a positive impact on valuable nearshore resources. Our application focuses Kona Coast Hawai‘i, being actively studied and both ecology resources are serious sociopolitical issues. To incorporate water extraction resources, we impose safe minimum standard...
Anthropogenic nutrient loading is well recognized as a stressor to coastal ecosystem health. However, resource managers are often focused on addressing point source or surface water discharge, whereas the impact of submarine groundwater discharge (SGD) vector unappreciated. This study examines connections between land use and through comparison four watersheds embayments spanning gradient human Tutuila, high tropical oceanic island in American Samoa. In each location, radon-222 measurements,...
Abstract Coastal groundwater‐dependent ecosystems benefit from lowered salinity, nutrient‐rich submarine groundwater discharge (SGD). Across Pacific islands marine macroalgae appear to have been challenged by and adapted the stress of salinity with a trade‐off nutrient subsidies delivered SGD. Human alterations resources climate change‐driven shifts brought modifications magnitude composition This paper discusses how native SGD gradients, but that invasive algae are outcompeting natives near...
On many tropical reefs, submarine groundwater discharge (SGD) provides a substantial and often overlooked nutrient source to nearshore ecosystems, yet little is known about the impacts of SGD on biology reef organisms. To address this, physiological responses endemic rhodophyte Gracilaria coronopifolia an invasive congener, salicornia, were examined across gradient in field laboratory. Tissue samples both species cultured for 16 days along onshore-offshore at Wailupe, Oahu. G. salicornia...