Details

Autor(en) / Beteiligte

• Silva, José Luiz Alves
• da Silva, Amanda Lúcia Pereira Machado
• dos Santos, Queila Costa
• de Mello e Silva, Mateus Freitas
• Pereira Júnior, Carlos Alvarenga
• Vitória, Angela Pierre

Titel

Topography imposes an abiotic filter on tree growth in restored areas

Ist Teil von

• Theoretical and experimental plant physiology, 2023-12, Vol.35 (4), p.363-377

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Topography is a key abiotic factor for plant performance and, despite the well-known effects of topographic features on tree growth and traits in mature and secondary forests, less attention has been paid to early-stage restoration areas. We aimed to test whether and how elevation, slope, and slope aspects affect tree growth rates, and morpho-physiological traits in restoration. In this scenario, we asked which traits correlate with tree growth? How do species adjust their growth and traits to topography? And how does intraspecific variation change with topography? This study was carried out on a hill of ca. 70 m, with a former history of use for pasture. Six tree species were monitored over a one-year sampling interval. Principal component analysis, simple regressions, and ANOVA tests were applied. More growth was observed in the north-facing aspect. Traits related to photoprotection (non-photochemical quenching, and total carotenoids) were the ones that most correlated with growth rates, most notably stem diameter, which suggests that strategies for dealing with photoinhibition are crucial for tree growth in degraded pastures. Four out of six species showed a great differentiation between slope aspects. Physiological traits were more plastic and responsive to topography than was specific leaf area. While significant relationships between species and topographic features were an indication that intraspecific variation is influenced by topography, the direction of changes in intraspecific variation was not common to all species (except for total chlorophyll). The results indicate that species selection processes for restoration in degraded pastures should consider the interaction between functional traits (including pigments, and chlorophyll a fluorescence) and local topography.