| Registro completo |
| Provedor de dados: |
Acta Botanica
|
| País: |
Brazil
|
| Título: |
Is size structure a good measure of future trends of plant populations? an empirical approach using five woody species from the Cerrado (Brazilian savanna)
|
| Autores: |
Virillo,Carolina Bernucci
Martins,Fernando Roberto
Tamashiro,Jorge Yoshio
Santos,Flavio Antonio Maës dos
|
| Data: |
2011-09-01
|
| Ano: |
2011
|
| Palavras-chave: |
Gini coefficient
Population dynamics
Reverse-J shape
Population viability analysis
|
| Resumo: |
Size distributions in woody plant populations have been used to assess their regeneration status, assuming that size structures with "reverse-J" shapes represent stable populations. We present an empirical approach of this issue using five woody species from the Cerrado. Considering count data for all plants of these five species over a 12-year period, we analyzed size distribution by: a) plotting frequency distributions and their adjustment to the negative exponential curve and b) calculating the Gini coefficient. To look for a relationship between size structure and future trends, we considered the size structures from the first census year. We analyzed changes in number over time and performed a simple population viability analysis, which gives the mean population growth rate, its variance and the probability of extinction in a given time period. Frequency distributions and the Gini coefficient were not able to predict future trends in population numbers. We recommend that managers should not use measures of size structure as a basis for management decisions without applying more appropriate demographic studies.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000300012
|
| Editor: |
Sociedade Botânica do Brasil
|
| Relação: |
10.1590/S0102-33062011000300012
|
| Formato: |
text/html
|
| Fonte: |
Acta Botanica Brasilica v.25 n.3 2011
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
