Project Title

LTER: MCM6 - The roles of legacy and ecological connectivity in a polar desert ecosystem polar desert ecosystem

Summary

Event Number:
C-505-M
NSF / OPP Award 2224760

Program Director:
Dr. Rebecca Gast

ASC POC/Implementer:
Ryan Steiner / Jenny Cunningham

Principal Investigator(s)

Dr. Michael N Gooseff
michael.gooseff@colorado.edu
University of Colorado Boulder
Institute of Arctic and Alpine Research

Project Web Site:
https://mcm.lternet.edu/

Location

Supporting Stations: McMurdo Station
Research Locations: Dry Valleys

Description

In this iteration of the McMurdo LTER project (MCM6), the team will test ecological connectivity and stability theory in a system subject to strong physical drivers (geological legacies, extreme seasonality, and contemporary climate change) and driven by microbial organisms. The team hypothesizes that the structure and functioning of the MDV ecosystem is dependent upon legacies and the contemporary frequency, duration, and magnitude of ecological connectivity. This hypothesis will be tested with new and continuing monitoring, experiments, and analyses of long-term datasets to examine: 1) the stability of these ecosystems as reflected by sentinel taxa; 2) the relationship between ecological legacies and ecosystem resilience; 3) the importance of material carryover during periods of low connectivity to maintaining biological activity and community stability; and 4) how changes in disturbance dynamics disrupt ecological cycles through the polar night. Tests of these hypotheses will occur in field and modeling activities using new and long-term datasets already collected.

Field Season Overview

Ten participants will deploy for a limited field season. Three teams of three will conduct field work out of fixed camps at Lake Bonney, Lake Fryxell, and Lake Hoare between late October and early December. Activities throughout the Dry Valleys will include "limno runs", servicing the phytoplankton sampler, collecting water, ice, algal mat, and soil samples, opening stream gauges, sampling aeolian collectors on lake ice and along streams, maintenance of lake monitoring stations and meteorological stations. Earthscope GAGE will provide support measuring lake levels, setting up and servicing GPS stations, and flying UAS surveys. One LTER team member will remain in Crary Lab throughout the season to process samples. Following the cessation of field activities in early December, eight team members will redeploy and two will remain on station into January to process samples.

Deploying Team Members