Population dynamics of Podocarpus lambertii in southern Brazilian forest–grassland mosaics
| Autor: | Maurício Sedrez dos Reis, Tiago Montagna, Marcia Patricia Hoeltgebaum, Adelar Mantovani, Miguel Busarello Lauterjung, Rafael Candido-Ribeiro, Alison Paulo Bernardi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Global and Planetary Change education.field_of_study geography.geographical_feature_category Ecology biology Population Forestry Podocarpus lambertii biology.organism_classification 010603 evolutionary biology 01 natural sciences Grassland Geography education 010606 plant biology & botany |
| Zdroj: | Canadian Journal of Forest Research. 49:884-891 |
| ISSN: | 1208-6037 0045-5067 |
| DOI: | 10.1139/cjfr-2018-0531 |
| Popis: | The grasslands conversion to forests is occurring globally and modifying the population dynamics of species. Here, we characterized the population dynamics of Podocarpus lambertii Klotzsch ex Endl. over four years in southern Brazilian forest–grassland mosaics. We asked (i) if the studied P. lambertii population would decrease or increase over time and (ii) what the role of forest patches is in the growth and recruitment of a P. lambertii population. Thus, we studied forest–grassland mosaics, stratified the population into four demographic classes, evaluated the population dynamics, and estimated the correlation between canopy cover and average number of individuals. All individuals of P. Lambertii occurred in forest patches. Density was high but decreased from seedlings to the reproductive stage. The population growth rate was λ = 1.025, and the recruitment of individuals was high and variable among years. The transition and mortality rates showed a pattern of reduction from seedlings to the reproductive stage. Mortality rate for seedlings and juveniles was low and concentrated at the smaller heights. The correlations between canopy cover and the average number of individuals were positive and significant. The ecological characteristics of this species and specific conditions provided by forest patches allow population growth and species conservation in the southern Brazilian forest–grassland mosaics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|