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Publication details

Document type
Journal articles

Document subtype
Full paper

Title
Shading, nitrogen and soil texture rule a sandy savanna: Does facilitation rule its patchy physiognomy as well?

Participants in the publication
João Augusto Alves Meira-Neto (Author)
Maria Carolina Nunes Alves da Silva (Author)
Gláucia Soares Tolentino (Author)
Markus Gastauer (Author)
Tillmann Buttschardt (Author)
Florian Ulm (Author)
CE3C - Centro de Ecologia, Evolução e Alterações Ambientais
Cristina Máguas (Author)
Dep. Biologia Vegetal
CE3C - Centro de Ecologia, Evolução e Alterações Ambientais

Summary
Abstract\nOligotrophic sandy ecosystems have been the subject of investigations into understanding assembly rules because of their harsh conditions. Light, nitrogen availability and soil texture can cause constraints in oligotrophic sandy ecosystems, but can be attenuated by shading. This work aimed to answer the following questions. How do light (shading), soil texture and nitrogen interact in ruling an oligotrophic sandy savanna? Does the assemblage of patchy savanna differ from the assemblage of other physiognomies? If it differs, could the assemblage of patchy savanna be explained by plant–plant facilitation? Five circular plots (radius = 3 m) were established in each of five different physiognomies (25 plots in total): grassland, open savanna, patchy savanna, closed savanna and woodland. We identified and collected adult leaves of every individual plant inside the plots for measuring nitrogen (leaf nitrogen concentration, δ15N and C/N). We took hemispherical photos for quantification of light and collected compound soil samples for measuring soil nitrogen and soil texture. We performed generalized linear mixed models and richness estimates in order to test the influences of light (shading), nitrogen (leaf concentration, soil content, δ15N and leaf C/N) and soil properties on communities of a tropical sandy savanna. Light was not related to soil nitrogen, but was negatively related to leaf nitrogen concentration, to clay and to coarse sand, and positively related to fine sand. Leaf nitrogen concentration was negatively related to C/N and to δ15N. Compared to grassland and open savanna, patchy savanna, closed savanna and woodland were significantly richer in species and had higher leaf nitrogen concentration, higher leaf δ15N and lower leaf C/N. Patchy savanna was more shaded and had more species than expected, according to the relationship of light and species richness with fine sand. Compared to other physiognomies, the distinctive assemblage of patchy savanna suggests plant–plant facilitation as an assembly rule.

Date of Publication
2018-02-00

Where published
Flora

Publication Identifiers
ISSN - 0367-2530

Publisher
Elsevier BV

Volume
239

Starting page
45
Last page
51

Document Identifiers
URL - http://dx.doi.org/10.1016/j.flora.2017.11.007
DOI - https://doi.org/10.1016/j.flora.2017.11.007

Rankings
SCOPUS Q2 (2017) - 0.57 - Ecology
Web Of Science Q3 (2017) - 1.365 - ECOLOGY - SCIE

Keywords
Assembly rules C:N ratio Mussununga Nitrogen isotope ratio Oligotrophic ecosystems Plant diversity Water stress


Export

APA
João Augusto Alves Meira-Neto, Maria Carolina Nunes Alves da Silva, Gláucia Soares Tolentino, Markus Gastauer, Tillmann Buttschardt, Florian Ulm, Cristina Máguas, (2018). Shading, nitrogen and soil texture rule a sandy savanna: Does facilitation rule its patchy physiognomy as well?. Flora, 239, 45-51. ISSN 0367-2530. eISSN . http://dx.doi.org/10.1016/j.flora.2017.11.007

IEEE
João Augusto Alves Meira-Neto, Maria Carolina Nunes Alves da Silva, Gláucia Soares Tolentino, Markus Gastauer, Tillmann Buttschardt, Florian Ulm, Cristina Máguas, "Shading, nitrogen and soil texture rule a sandy savanna: Does facilitation rule its patchy physiognomy as well?" in Flora, vol. 239, pp. 45-51, 2018. 10.1016/j.flora.2017.11.007

BIBTEX
@article{37950, author = {João Augusto Alves Meira-Neto and Maria Carolina Nunes Alves da Silva and Gláucia Soares Tolentino and Markus Gastauer and Tillmann Buttschardt and Florian Ulm and Cristina Máguas}, title = {Shading, nitrogen and soil texture rule a sandy savanna: Does facilitation rule its patchy physiognomy as well?}, journal = {Flora}, year = 2018, pages = {45-51}, volume = 239 }