Coastal ecosystems

Small plants are growing in numerous pots in a laboratory setting

Vulnerability of Coastal Ecosystems to Increased Salinity from Climate Change

PI: Kasey Barton
Critical Hawaiian coastal habitats are at risk from climate change impacts, particularly sea-level rise, which threaten protective coastal plant species. This work examines the salinity tolerance of native, and invasive, coastal plants to identify those in need of greater management and conservation action.
A water hazard sign sits near a beach

Tracking groundwater nutrients using novel tracers to inform coastal watershed management in South Kohala, Hawaiʻi

PI: Henrietta Dulai
Using a combination of nitrogen isotopes and microcontaminants as source tracers, this project aims to identify pathways of groundwater flow to the coastline along South Kohala, Hawaiʻi, tracing sources of groundwater contaminants and excess nutrients. Managers can use results to improve wastewater management and improve coral reef resilience.
A split image with the left showing a researcher adding dye to the top of a cesspool, and the right showing a natural rock-enclosed pool dyed green.

Identifying hot spots of sewage pollution in Hilo, Hawaiʻi

PI: Tracy Wiegner
Hawaiʻi banned new cesspools in 2015, but groundwater contamination from the remaining 8700 cesspools in the Hilo area is a continuing concern. This work will use dye tracer studies to track cesspool outflows and use sewage indicators to establish contaminant sources to coastal groundwaters to inform future management decisions.
Google Earth image showing small round brown reefs with brighter rings around them

What can seascape-scale vegetation patterns on coral reefs tell us about reef health?

PI: Elizabeth Madin
Coral reefs worldwide are threatened by changing conditions yet are often remote and hard to monitor. This project will use drone-based imagery to explore how coral “halos” are linked to reef ecosystem health, and whether that health may change over time where protective measures are instituted.