| Popis: |
article i nfo We present a novel approach for performing environmental gradient analysis to address the question: is maximum potential tree density in eastern Lake Tahoe Basin, NV limited by water, temperature/energetic constraints, or both? To address this question we fuse continuous tree density estimates derived from hyperspatialremotesensingimagery(pixelssmallerthantrees)withtwotopographicallyderivedenvironmental gradients: elevation and yearly potential relative radiation (PRR). We based our analysis on the maximum tree density found in each of over 200 environmental gradient combinations found with our area of interest, drawing from adatasetconsistingof over300,00030m plotsandover3millionindividualtrees.Atagivenelevation,sites in which maximum tree density increases as a function of increasing yearly PRR were considered to be temperature or energy limited. Conversely, sites in which maximum tree density decreased as a function of |
Full Text from ScienceDirect