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Title: Albedo feedbacks to future climate via climate change impacts on dryland biocrusts

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep44188· OSTI ID:1535106
 [1];  [2];  [3];  [3];  [4];  [5];  [3]
  1. Univ. of Arizona, Tuscon, AZ (United States). School of Natural Resources and the Environment; U.S. Geological Survey (USGS), Moab, UT (United States). Southwest Biological Science Center
  2. Univ. of California, Los Angeles, CA (United States). Joint Inst. for Regional Earth System Science and Engineering
  3. U.S. Geological Survey (USGS), Moab, UT (United States). Southwest Biological Science Center
  4. Univ. of California, Los Angeles, CA (United States). Dept. of Geography
  5. National Ecological Observatory Network (NEON), Boulder, CO (United States)

Drylands represent the planet’s largest terrestrial biome and evidence suggests these landscapes have large potential for creating feedbacks to future climate. Recent studies also indicate that dryland ecosystems are responding markedly to climate change. Biological soil crusts (biocrusts) - soil surface communities of lichens, mosses, and/or cyanobacteria - comprise up to 70% of dryland cover and help govern fundamental ecosystem functions, including soil stabilization and carbon uptake. Drylands are expected to experience significant changes in temperature and precipitation regimes, and such alterations may impact biocrust communities by promoting rapid mortality of foundational species. In turn, biocrust community shifts affect land surface cover and roughness—changes that can dramatically alter albedo. We tested this hypothesis in a full-factorial warming (+4 °C above ambient) and altered precipitation (increased frequency of 1.2 mm monsoon-type watering events) experiment on the Colorado Plateau, USA. We quantified changes in shortwave albedo via multi-angle, solar-reflectance measurements. Warming and watering treatments each led to large increases in albedo (>30%). This increase was driven by biophysical factors related to treatment effects on cyanobacteria cover and soil surface roughness following treatment-induced moss and lichen mortality. A rise in dryland surface albedo may represent a previously unidentified feedback to future climate.

Research Organization:
U.S. Geological Survey (USGS), Menlo Park, CA (United States). Western Region
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0008168
OSTI ID:
1535106
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 70 works
Citation information provided by
Web of Science

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Cited By (20)

Biocrusts benefit from plant removal journal July 2018
Temporal and abiotic fluctuations may be preventing successful rehabilitation of soil‐stabilizing biocrust communities journal May 2019
Simulated climate change affects how biocrusts modulate water gains and desiccation dynamics after rainfall events journal January 2018
Biological soil crusts: diminutive communities of potential global importance journal March 2017
Environmental determinants of biocrust carbon fluxes across Europe: possibilities for a functional type approach journal April 2018
Biocrusts: the living skin of the earth journal July 2018
High rainfall frequency promotes the dominance of biocrust under low annual rainfall journal November 2018
Soil surface disturbance alters cyanobacterial biocrusts and soil properties in dry grassland and shrubland ecosystems journal June 2019
Traversing the Wasteland: A Framework for Assessing Ecological Threats to Drylands journal December 2019
No support for the emergence of lichens prior to the evolution of vascular plants journal November 2019
Warming reduces the cover, richness and evenness of lichen-dominated biocrusts but promotes moss growth: insights from an 8 yr experiment journal January 2018
Amendments fail to hasten biocrust recovery or soil stability at a disturbed dryland sandy site: Amendments fail to hasten recovery at dryland site journal September 2018
A practical guide to measuring functional indicators and traits in biocrusts journal July 2019
Global ecosystem thresholds driven by aridity journal February 2020
Characteristics of Wetting-Induced Bacteriophage Blooms in Biological Soil Crust journal December 2019
Estimating the Impact of Artificially Injected Stratospheric Aerosols on the Global Mean Surface Temperature in the 21th Century journal October 2018
Spectral Response Analysis: An Indirect and Non-Destructive Methodology for the Chlorophyll Quantification of Biocrusts journal June 2019
Patterns of longer-term climate change effects on CO 2 efflux from biocrusted soils differ from those observed in the short term journal January 2018
Global ecosystem thresholds driven by aridity text January 2020
Advanced Photogrammetry to Assess Lichen Colonization in the Hyper-Arid Namib Desert journal October 2017

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