Detecting the Early Genetic Effects of Habitat Degradation in Small Size Remnant Populations of Machilus thunbergii Sieb. et Zucc. (Lauraceae)
| Autor: | Naohiko Noma, Yuko Kaneko, Yuri Maesako, Shuntaro Watanabe |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine lcsh:QH1-199.5 Article Subject Plant Science lcsh:General. Including nature conservation geographical distribution 010603 evolutionary biology 01 natural sciences 03 medical and health sciences lcsh:Forestry Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Panmixia biology Ecology Forestry Small population size Lauraceae Evergreen biology.organism_classification 030104 developmental biology Habitat destruction Habitat Genetic structure lcsh:SD1-669.5 Inbreeding |
| Zdroj: | International Journal of Forestry Research, Vol 2017 (2017) |
| ISSN: | 1687-9368 |
| DOI: | 10.1155/2017/9410626 |
| Popis: | Habitat degradation caused by human activities has reduced the sizes of many plant populations worldwide, generally with negative genetic impacts. However, detecting such impacts in tree species is not easy because trees have long life spans.Machilus thunbergiiSieb. et Zucc. (Lauraceae) is a dominant tree species of broad-leaved evergreen forests distributed primarily along the Japanese coast. Inland habitats for this species have become degraded by human activities. To investigate the effects of habitat degradation on genetic structure, we compared the genetic diversities of mature and juvenile trees of fiveM. thunbergiipopulations around Lake Biwa in Japan. Allelic diversity was influenced by past lineage admixture events, but the effects of forest size were not clear. On the other hand, the inbreeding coefficient of the juvenile stage was higher in small populations, whereas large populations maintained panmictic breeding. Also, the extent of genetic differentiation was greater in juveniles than in mature trees. We detected the early genetic effects of habitat degradation in small, isolatedM. thunbergiipopulations, indicating that habitat degradation increases inbreeding and genetic differentiation between populations. |
| Databáze: | OpenAIRE |
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