Publication Date
Summer 2024
Abstract
Lichenometry, a technique used primarily in high latitudes and mountainous regions to date rock surface exposure, relies on estimations of lichen growth rates. Utilizing Rhizocarpon lichen, lichenometry has been extensively applied to date Late Holocene glacial landforms. In this study, we explore Rhizocarpon distribution in the Peri Himal of the Nepal Himalaya to understand the microclimatic and environmental mechanisms that dictate their growth location. We collected 25 data points throughout the western moraine of Ponkar Glacier near Kehcakyu Khola and around Ponkar Lake. Through this data we raised the question, under what conditions do Rhizocarpon lichen grow in high altitude Himalayan environments? Our results show an increased presence of the lichen on boulder faces pointed west above 3800m on west-facing slopes. This suggests a trend of growth in regions of the Peri Himal that experience dryer, less insolated microclimates, as less moisture and sunlight may result in less competition for Rhizocarpon lichen.
Disciplines
Life Sciences | Physical Sciences and Mathematics
Recommended Citation
Lehmann, Matt and Havlat, Daniel, "Geospatial Distribution of Rhizocarpon Lichens in the Peri Himal" (2024). Nepal: Geoscience in the Himalaya. 1.
https://digitalcollections.sit.edu/npg/1