Published July 16, 2020 | Version v1
Dataset Open

Data for: Landscape scale variation in the hydrologic niche of California coast redwood

  • 1. The University of Texas at Austin
  • 2. Arizona State University
  • 3. University of Miami
  • 4. Stanford University

Description

Topoclimatic diversity within forest landscapes can underlie variation in water availability, which may correspond to patterns in habitat suitability of tree species with differing hydrologic niches. However, the trade-off between the collection of data at a fine grain size over large spatial extents has limited comprehensive analyses of landscape scale variation in habitat suitability. We present a fine scale analysis of the roles of topographic gradients in moisture availability, soil water storage, and fog frequency in the spatial pattern of habitat suitability for coast redwood (Sequoia sempervirens), at 10 m resolution across 34,800 hectares and three landscapes spanning approximately one-third of redwood's latitudinal range. A new 10 m resolution presence-absence map derived from airborne imaging spectroscopy was used to characterize current redwood distributions in three landscapes. Access to belowground moisture was assessed through four measures calculated from a high-resolution LiDAR digital elevation model, soil water storage was mapped from the USDA Soil Survey Geographic Database, and fog frequency was calculated from MODIS cloud cover data. Access to belowground moisture and fog predicted variation in suitability as redwood habitat from 22–75% and predicted redwood presence and absence at 10 m resolution with 63–74% accuracy. Across all three landscapes, redwood density consistently decreased with increasing interpolated height above a stream (IHAS), but the role of other predictors varied among the sites. Our results challenge previous assumptions that redwood habitat suitability within much coarser resolutions (800 m x 800 m) can be described by a single value. The elevated habitat suitability of sites close to streams suggests that these sites should be evaluated for their potential to become microrefugia within landscapes that may become climatically unsuitable for redwoods at a regional scale. 

Notes

Details are provided in the README.txt file; please read the file prior to use of the data.

Funding provided by: The Global Airborne Obervatory (GAO) Flights over California were funded by the David and Lucile Packard Foundation. The Global Airborne Observatory is made possible by support provided by private foundations, visionary individuals, and Arizona State University.*
Crossref Funder Registry ID:
Award Number:

Funding provided by: E.J. Francis was funded by a Stanford Graduate Fellowship in Science and Engineering*
Crossref Funder Registry ID:
Award Number:

Funding provided by: Field work was funded by the Save the Redwoods League*
Crossref Funder Registry ID:
Award Number: 10674

Funding provided by: Field work was funded by the Save the Redwoods League
Crossref Funder Registry ID:
Award Number: 10674

Files

doi_10_1111_ecog_05080.zip

Files (51.6 MB)

Name Size Download all
md5:119d54bab758cfbf0f13686254386ffc
51.6 MB Preview Download

Additional details

Related works

Is cited by
10.1111/ecog.05080 (DOI)