Natural recovery of genetic diversity by gene flow in reforested areas of the endemic Canary Island pine, Pinus canariensis
نویسندگان
چکیده
15 The endemic pine, Pinus canariensis, forms one of the main forest ecosystems in the 16 Canary Islands. In this archipelago, pine forest is a mosaic of natural stands (remnants 17 of past forest overexploitation) and artificial stands planted from the 1940’s. The 18 genetic makeup of the artificially regenerated forest is of some concern. The use of 19 reproductive material with uncontrolled origin or from a reduced number of parental 20 trees may produce stands ill adapted to local conditions or unable to adapt in response 21 to environmental change. The genetic diversity within a transect of reforested stands 22 connecting two natural forest fragments has been studied with nuclear and chloroplast 23 microsatellites. Little genetic differentiation and similar levels of genetic diversity to 24 the surrounding natural stands was found for nuclear markers. However, chloroplast 25
منابع مشابه
Natural Recovery of Genetic Diversity by Gene Flow in Reforested Areas of the 1 Endemic Canary Island Pine, Pinus Canariensis 2 3
15 The endemic pine, Pinus canariensis, forms one of the main forest ecosystems in the 16 Canary Islands. In this archipelago, pine forest is a mosaic of natural stands (remnants 17 of past forest overexploitation) and artificial stands planted from the 1940’s. The 18 genetic makeup of the artificially regenerated forest is of some concern. The use of 19 reproductive material with uncontrolled ...
متن کاملThe Effect of Altitude on the Pattern of Gene Flow in the Endemic Canary Island Pine, Pinus canariensis
Pinus canariensis is endemic to the western Canary Islands (NW coast of Africa), where it forms forest spanning an altitude from 500 to 2500 m. There are dramatic changes in environmental conditions (temperature, moisture and solar radiation) over short distances due to this elevation gradient in the Canary Island pine forest. Those differences in environmental conditions may lead to asynchrono...
متن کاملChloroplast microsatellites reveal colonization and metapopulation dynamics in the Canary Island pine.
Chloroplast microsatellites are becoming increasingly popular markers for population genetic studies in plants, but there has been little focus on their potential for demographic inference. In this work the utility of chloroplast microsatellites for the study of population expansions was explored. First, we investigated the power of mismatch distribution analysis and the F(S) test with coalesce...
متن کاملPrescribed Burning and Clear-Cutting Effects on Understory Vegetation in a Pinus canariensis Stand (Gran Canaria)
Prescribed fires are a powerful tool for reducing fire hazards by decreasing amounts of fuel. The main objective is to analyze the effects of prescribed burning on the understory vegetation composition as well as on the soil characteristics of a reforested stand of Pinus canariensis. The study attempts to identify the effects of the preburning treatment of cutting understory vegetation on the f...
متن کاملPopulation divergence for heteroblasty in the Canary Island pine (Pinus canariensis, Pinaceae).
A heteroblastic (or vegetative phase) change is an abrupt manifestation in the general heteroblastic development during the ontogeny of plants. The Canary Island pine undergoes an especially marked and delayed heteroblastic change, including both the formation of secondary needles on dwarf shoots and the onset of preformed growth. To assess genetic and environmental effects on the heteroblastic...
متن کامل