DSpace Repository

Variation in photosynthetic and nonphotosynthetic vegetation along edaphic and compositional gradients in northwestern Amazonia

Show simple item record

dc.contributor.author Higgins, M. A. en
dc.contributor.author Asner, G. P. en
dc.contributor.author Perez, E. en
dc.contributor.author Elespuru, N. en
dc.contributor.author Alonso, Alfonso en
dc.date.accessioned 2020-03-02T21:45:32Z
dc.date.available 2020-03-02T21:45:32Z
dc.date.issued 2014
dc.identifier.citation Higgins, M. A., Asner, G. P., Perez, E., Elespuru, N., and Alonso, Alfonso. 2014. "<a href="https://www.biogeosciences.net/11/3505/2014/bg-11-3505-2014.pdf;">Variation in photosynthetic and nonphotosynthetic vegetation along edaphic and compositional gradients in northwestern Amazonia</a>." <em>Biogeosciences</em>. 11 (13):3505&ndash;3513. <a href="https://doi.org/10.5194/bg-11-3505-2014">https://doi.org/10.5194/bg-11-3505-2014</a> en
dc.identifier.issn 1726-4189
dc.identifier.uri https://hdl.handle.net/10088/104479
dc.description.abstract Abstract. Tropical forests vary substantially in aboveground properties such as canopy height, canopy structure, and plant species composition, corresponding to underlying variations in soils and geology. Forest properties are often difficult to detect and map in the field, however, due to the remoteness and inaccessibility of these forests. Spectral mixture analysis of Landsat imagery allows mapping of photosynthetic and nonphotosynthetic vegetation quantities (PV and NPV), corresponding to biophysical properties such as canopy openness, forest productivity, and disturbance. Spectral unmixing has been used for applications ranging from deforestation monitoring to identifying burn scars from past fires, but little is known about variations in PV and NPV in intact rainforests. Here we use spectral unmixing of Landsat imagery to map PV and NPV in northern Amazonia, and to test their relationship to soils and plant species composition. To do this we sampled 117 sites crossing a geological boundary in northwestern Amazonia for soil cation concentrations and plant species composition. We then used the Carnegie Landsat Analysis System to map PV and NPV for these sites from multiple dates of Landsat imagery. We found that soil cation concentrations and plant species composition consistently explain a majority of the variation in remotely sensed PV and NPV values. After combining PV and NPV into a single variable (PV–NPV), we determined that the influence of soil properties on canopy properties was inseparable from the influence of plant species composition. In all cases, patterns in PV and NPV corresponded to underlying geological patterns. Our findings suggest that geology and soils regulate canopy PV and NPV values in intact tropical forests, possibly through changes in plant species composition. en
dc.relation.ispartof Biogeosciences en
dc.title Variation in photosynthetic and nonphotosynthetic vegetation along edaphic and compositional gradients in northwestern Amazonia en
dc.type Journal Article en
dc.identifier.srbnumber 153485
dc.identifier.doi 10.5194/bg-11-3505-2014
rft.jtitle Biogeosciences
rft.volume 11
rft.issue 13
rft.spage 3505
rft.epage 3513
dc.description.SIUnit NZP en
dc.citation.spage 3505
dc.citation.epage 3513
dc.relation.url https://www.biogeosciences.net/11/3505/2014/bg-11-3505-2014.pdf;


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account

Statistics