Novel Approaches for Understanding Groundwater Dependent Ecosystems in a Changing Environment

Groundwater dependent ecosystems (GDEs) occur at different points of local, intermediate and regional groundwater flow systems. GDEs are commonly found where groundwater discharges at or near the surface, forming springs, gaining streams and terrestrial ecosystems that rely on groundwater for a stable water inflow of relatively constant temperature and quality. GDEs are particularly sensitive to changes in groundwater levels, which can result from groundwater abstraction, land management changes, and climate changes. Nevertheless, the conditions, triggers and thresholds under which changes in groundwater discharge, temperature and quality occur in GDEs are not well understood. In addition, the time lags and feedbacks between hydrological changes and ecological responses are still poorly documented. It is therefore difficult to predict and mitigate the impacts of climate change and anthropogenic stressors on these ecosystems.

Despite recent scientific advances allowing for a better understanding of GDEs, broadly applicable approaches for improved stewardship of GDEs are still critically lacking. In this context, considering GDEs in land use planning faces a lack of scientific knowledge, thus increasing the risks to biodiversity.

This Research Topic encourages contributions on innovative approaches to understand the hydrology, geochemistry, thermal regime, and resilience of groundwater-dependent ecosystems. We welcome articles focusing on:
• field measurements;
• monitoring;
• tracers;
• remote sensing;
• modeling;
• land management;
• GDE restoration.

Researchers can also submit articles focusing on:
• innovative methods developed or adapted for the specific characteristics of different types of GDEs, in a variety of geological environments and climates, and under anthropogenic and climatic change;
• multidisciplinary contributions addressing the relationships between climate, the hydrology of groundwater discharge zones and the resilience of associated ecosystems, including vegetation and animal species.