Importance of topography for tree species habitat distributions in a terra firme forest in the Colombian Amazon

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Zuleta, Daniel,1990Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences (author)

Aims: To test the relative importance of topography versus soil chemistry in defining tree species-habitat associations in a terra firme Amazonian forest. Method: We evaluated habitat associations for 612 woody species using alternative habitat maps generated from topography and soil chemistry in the 25-ha Amacayacu Forest Dynamics Plot, Colombian Amazon. We assessed the ability of each habitat map to explain the community-level patterns of species-habitat associations using two methods of habitat randomization and different sample size thresholds (i.e., species’ abundance). Results: The greatest proportion of species-habitat associations arose from topographically-defined habitats (55% to 63%) compared to soil chemistry-defined (19% to 40%) or topography plus soil chemistry-defined habitats (18% to 42%). Results were robust to the method of habitat randomization and to sample size threshold. Conclusions: Our results demonstrate that certain environmental factors may be more influential than others in defining forest-level patterns of community assembly and that comparison of the ability of different environmental variables to explain habitat associations is a crucial step in testing hypotheses about the mechanisms underlying assembly. Our results point to topography-driven hydrological variation as a key factor structuring tree species distributions in what are commonly considered homogeneous Amazonian terra firme forests.

LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Skogsvetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Forest Science hsv//eng
NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
Amacayacu forest dynamics plot
Forest global earth observatory (ForestGEO)
Habitat filtering
Hydrological niches
Iterative amplitude adjusted Fourier transform
Northwestern Amazon
Torus translation test

Russo, Sabrina E. (author)
Barona, Andrés (author)
Barreto-Silva, Juan S. (author)
Cardenas, Dairon (author)
Castaño, Nicolas (author)
Davies, Stuart J. (author)
Detto, Matteo (author)
Sua, Sonia (author)
Turner, Benjamin L. (author)
Duque, Alvaro (author)
Göteborgs universitetInstitutionen för biologi och miljövetenskap (creator_code:org_t)

In:Plant and Soil: Springer Science and Business Media LLC450, s. 133-1490032-079X1573-5036

By the author/editor: Zuleta, Daniel, ...; Russo, Sabrina E ...; Barona, Andrés; Barreto-Silva, J ...; Cardenas, Dairon; Castaño, Nicolas; show more...; Davies, Stuart J ...; Detto, Matteo; Sua, Sonia; Turner, Benjamin ...; Duque, Alvaro; show less...

About the subject

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agriculture Fore ...; and Forest Science

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