Title: Reduced ecosystem resilience quantifies fine-scale heterogeneity in tropical forest mortality responses to drought

Journal Article · · Global Change Biology
DOI: https://doi.org/10.1111/gcb.16046 · OSTI ID:1890938
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3];  [4];  [2]; ORCiD logo [5];  [6];  [7];  [8];  [8];  [9]; ORCiD logo [1]
  1. Cornell Univ., Ithaca, NY (United States)
  2. Univ. of Minnesota, St. Paul, MN (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Atmospheric Science and Global Change Div. (ASGC); Washington State Univ., Pullman, WA (United States)
  4. Colby College, Waterville, ME (United States)
  5. Univ. of Notre Dame, IN (United States)
  6. The Ohio State Univ., Columbus, OH (United States)
  7. Duke Univ., Durham, NC (United States)
  8. Costa Rica Institute of Technology (Costa Rica)
  9. Univ. of Alberta, Edmonton, AB (Canada)

Sensitivity of forest mortality to drought in carbon-dense tropical forests remains fraught with uncertainty, while extreme droughts are predicted to be more frequent and intense. Here, in this study, the potential of temporal autocorrelation of high-frequency variability in Landsat Enhanced Vegetation Index (EVI), an indicator of ecosystem resilience, to predict spatial and temporal variations of forest biomass mortality is evaluated against in situ census observations for 64 site-year combinations in Costa Rican tropical dry forests during the 2015 ENSO drought. Temporal autocorrelation, within the optimal moving window of 24 months, demonstrated robust predictive power for in situ mortality (leave-one- out cross-validation R2 = 0.54), which allows for estimates of annual biomass mortality patterns at 30 m resolution. Subsequent spatial analysis showed substantial fine-scale heterogeneity of forest mortality patterns, largely driven by drought intensity and ecosystem properties related to plant water use such as forest deciduousness and topography. Highly deciduous forest patches demonstrated much lower mortality sensitivity to drought stress than less deciduous forest patches after elevation was controlled. Our results highlight the potential of high-resolution remote sensing to “fingerprint” forest mortality and the significant role of ecosystem heterogeneity in forest biomass resistance to drought.

Research Organization:
Cornell Univ., Ithaca, NY (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
National Science Foundation (NSF); National Science and Engineering Research Council of Canada; USDOE
Grant/Contract Number:
AC05-76RL01830; SC0014363
OSTI ID:
1890938
Report Number(s):
PNNL-SA-169613
Journal Information:
Global Change Biology, Journal Name: Global Change Biology Journal Issue: 6 Vol. 28; ISSN 1354-1013
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (61)

Amazon forest response to repeated droughts: AMAZON FOREST RESPONSE TO DROUGHTS journal July 2016
Trait‐based signatures of cloud base height in a tropical cloud forest journal June 2020
Assessing regional drought impacts on vegetation and evapotranspiration: a case study in Guanacaste, Costa Rica journal January 2019
Tree mortality submodels drive simulated long-term forest dynamics: assessing 15 models from the stand to global scale journal February 2019
Drought-induced mortality patterns and rapid biomass recovery in a terra firme forest in the Colombian Amazon journal August 2017
Diversity and structure of regenerating tropical dry forests in Costa Rica: Geographic patterns and environmental drivers journal September 2009
Estimating carbon stock in secondary forests: Decisions and uncertainties associated with allometric biomass models journal October 2011
The Global Ecosystem Dynamics Investigation: High-resolution laser ranging of the Earth’s forests and topography journal June 2020
Predicting Chronic Climate-Driven Disturbances and Their Mitigation journal January 2018
The Shuttle Radar Topography Mission journal January 2007
Recovery: Fast and Slow—Vegetation Response During the 2012–2016 California Drought journal April 2021
Early-warning signals for critical transitions journal September 2009
Long-term decline of the Amazon carbon sink journal March 2015
Death from drought in tropical forests is triggered by hydraulics not carbon starvation journal November 2015
Global patterns of drought recovery journal August 2017
Remotely sensed resilience of tropical forests journal September 2016
Larger trees suffer most during drought in forests worldwide journal September 2015
Genomic effects of population collapse in a critically endangered ironwood tree Ostrya rehderiana journal December 2018
Spatial validation reveals poor predictive performance of large-scale ecological mapping models journal September 2020
Satellite-observed pantropical carbon dynamics journal July 2019
Amazonian rainforest tree mortality driven by climate and functional traits journal April 2019
Reduced resilience as an early warning signal of forest mortality journal October 2019
Triggers of tree mortality under drought journal June 2018
The tropical forest carbon cycle and climate change journal July 2018
Widespread but heterogeneous responses of Andean forests to climate change journal November 2018
Asynchronous carbon sink saturation in African and Amazonian tropical forests journal March 2020
The climate hazards infrared precipitation with stations—a new environmental record for monitoring extremes journal December 2015
TerraClimate, a high-resolution global dataset of monthly climate and climatic water balance from 1958–2015 journal January 2018
Persistent effects of a severe drought on Amazonian forest canopy journal December 2012
Ecosystem heterogeneity determines the ecological resilience of the Amazon to climate change journal December 2015
Will seasonally dry tropical forests be sensitive or resistant to future changes in rainfall regimes? journal February 2017
Effect of drought on productivity in a Costa Rican tropical dry forest journal March 2018
Not all droughts are created equal: translating meteorological drought into woody plant mortality journal July 2013
Long-term climate and competition explain forest mortality patterns under extreme drought journal December 2016
Drought stress limits the geographic ranges of two tree species via different physiological mechanisms journal December 2015
Detecting early warning signals of tree mortality in boreal North America using multiscale satellite data journal March 2018
Testing early warning metrics for drought‐induced tree physiological stress and mortality journal May 2019
A catastrophic tropical drought kills hydraulically vulnerable tree species journal March 2020
Large drought‐induced aboveground live biomass losses in southern R ocky M ountain aspen forests journal November 2011
A working guide to boosted regression trees journal July 2008
Drought-mortality relationships for tropical forests journal July 2010
Research frontiers in drought-induced tree mortality: crossing scales and disciplines journal January 2015
Tree mortality from drought, insects, and their interactions in a changing climate journal June 2015
Diversity in plant hydraulic traits explains seasonal and inter-annual variations of vegetation dynamics in seasonally dry tropical forests journal May 2016
Drivers and mechanisms of tree mortality in moist tropical forests journal February 2018
Ecosystem heterogeneity and diversity mitigate Amazon forest resilience to frequent extreme droughts journal May 2018
Plant responses to rising vapor pressure deficit journal March 2020
Tropical forests did not recover from the strong 2015–2016 El Niño event journal February 2020
The Global Extent and Determinants of Savanna and Forest as Alternative Biome States journal October 2011
Global Resilience of Tropical Forest and Savanna to Critical Transitions journal October 2011
Anticipating Critical Transitions journal October 2012
Contrasting carbon cycle responses of the tropical continents to the 2015–2016 El Niño journal October 2017
Tropical forests are a net carbon source based on aboveground measurements of gain and loss journal September 2017
On the essentials of drought in a changing climate journal April 2020
Pervasive shifts in forest dynamics in a changing world journal May 2020
Droughts, Wildfires, and Forest Carbon Cycling: A Pantropical Synthesis journal May 2019
Tree Species Composition, Breeding Systems, and Pollination and Dispersal Syndromes in Three Forest Successional Stages in a Tropical Dry Forest in Mesoamerica journal March 2015
Cross-scale Drivers of Natural Disturbances Prone to Anthropogenic Amplification: The Dynamics of Bark Beetle Eruptions journal June 2008
On underestimation of global vulnerability to tree mortality and forest die-off from hotter drought in the Anthropocene journal August 2015
Background and Catastrophic Tree Mortality in Tropical Moist, Wet, and Rain Forests journal December 1996
Dynamics of Carbon Accumulation in Tropical Dry Forests under Climate Change Extremes journal January 2021