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Remote sensing of cytotype and its consequences for canopy damage in quaking aspen

Journal Article · · Global Change Biology
DOI:https://doi.org/10.1111/gcb.16064· OSTI ID:1847437
 [1];  [2];  [3];  [4];  [5];  [6];  [1];  [3]
  1. Department of Environmental Science, Policy, and Management University of California, Berkeley Berkeley California USA, Rocky Mountain Biological Laboratory Crested Butte Colorado USA, School of Life Sciences Arizona State University Tempe Arizona USA
  2. Jet Propulsion Laboratory California Institute of Technology Pasadena California USA
  3. Department of Wildland Resources Utah State University Logan Utah USA
  4. Department of Earth System Science Stanford University Stanford California USA, Climate and Ecosystems Division Lawrence Berkeley National Laboratory Berkeley California USA
  5. Rocky Mountain Biological Laboratory Crested Butte Colorado USA
  6. Forest Health Protection United States Forest Service Gunnison Colorado USA

Abstract

Mapping geographic mosaics of genetic variation and their consequences via genotype x environment interactions at large extents and high resolution has been limited by the scalability of DNA sequencing. Here, we address this challenge for cytotype (chromosome copy number) variation in quaking aspen, a drought‐impacted foundation tree species. We integrate airborne imaging spectroscopy data with ground‐based DNA sequencing data and canopy damage data in 391 km 2 of southwestern Colorado. We show that (1) aspen cover and cytotype can be remotely sensed at 1 m spatial resolution, (2) the geographic mosaic of cytotypes is heterogeneous and interdigitated, (3) triploids have higher leaf nitrogen, canopy water content, and carbon isotope shifts (δ 13 C) than diploids, and (4) canopy damage varies among cytotypes and depends on interactions with topography, canopy height, and trait variables. Triploids are at higher risk in hotter and drier conditions.

Sponsoring Organization:
USDOE
OSTI ID:
1847437
Journal Information:
Global Change Biology, Journal Name: Global Change Biology Journal Issue: 7 Vol. 28; ISSN 1354-1013
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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