Phenological characterization of a sky island: Insights into vegetation patterns across space and time

J. E. Davison, W. J.D. Van Leeuwen, G. M. Casady, S. E. Marsh

Research output: Contribution to conferencePaper

Abstract

Remotely sensed vegetation phenology data is often used to examine landscape-level vegetation interactions with climate and other drivers. Understanding vegetation phenology of sky islands is important for assessing the effect of predicted climate change (e.g. prolonged droughts) in these biologically diverse areas. We used Normalized Difference Vegetation Index (NDVI) time series data to derive phenological metrics (pheno-metrics), quantifying seasonal timing and magnitude, for Arizona's Santa Rita Mountains. Preliminary results suggest that these metrics are rich sources of information for characterizing landscape vegetation dynamics. Principal Components Analysis of twelve phenometrics showed spatial pattern in all twelve components, suggesting unique information and minimal noise in each metric. Classifications of the pheno-metrics showed yearly variation in spatial patterns and rough similarity to patterns in the Southwest Regional GAP Analysis Project vegetation classification. Further exploration of the spatial and temporal patterns of sky island pheno-metrics could enhance understanding of the phenology of arid ecosystems.

Original languageEnglish (US)
StatePublished - Dec 1 2007
Event32nd International Symposium on Remote Sensing of Environment: Sustainable Development Through Global Earth Observations - San Jose, Costa Rica
Duration: Jun 25 2007Jun 29 2007

Other

Other32nd International Symposium on Remote Sensing of Environment: Sustainable Development Through Global Earth Observations
CountryCosta Rica
CitySan Jose
Period6/25/076/29/07

Keywords

  • Arizona
  • NDVI
  • Phenology
  • Time-series analysis
  • Vegetation

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Environmental Engineering

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    Davison, J. E., Van Leeuwen, W. J. D., Casady, G. M., & Marsh, S. E. (2007). Phenological characterization of a sky island: Insights into vegetation patterns across space and time. Paper presented at 32nd International Symposium on Remote Sensing of Environment: Sustainable Development Through Global Earth Observations, San Jose, Costa Rica.