Department of Forest Ecology and Genetics, Forest Research Centre (CIFOR), INIA, 28040 Madrid, Spain.
New Phytol. 2011 Apr;190(1):222-233. doi: 10.1111/j.1469-8137.2010.03588.x. Epub 2010 Dec 22.
There is a gap between the order of magnitude of maximum documented distances of airborne tree pollen transport (up to 10(2)-10(3) km) and effective wind pollination (up to 10(1) km), which may partly derive from greater difficulties in detecting the latter. This study aims to assess wind pollination over scales closer to the maximum observed physical pollen transport distances. The origin of effective pollen immigrants into a strongly isolated Iberian Pinus sylvestris remnant was investigated using paternally inherited microsatellite markers and maximum-likelihood estimation combined with Monte Carlo assessment of parameter uncertainty. The results revealed significant effective pollen flow (up to 4.4%) from a large population located 100 km away, suggesting that the well-known mesoscale airborne transport of viable pine pollen can result in successful pollination over larger scales than previously reported for wind-pollinated tree species. This study supports the view that the gap between documented potential and effective wind pollen dispersal scales might not accurately reflect biological reality. Expanding the expected range of effective wind pollination has an impact on the assessment of a wide range of ecological and evolutionary processes, including reproductive assurance on fragmentation or colonization, metapopulation connectivity and interactions with local adaptation in heterogeneous habitats.
空气中树木花粉传播的最大记录距离（高达 10^2-10^3 公里）与有效风授粉之间存在数量级上的差距，这可能部分源于后者更难以检测。本研究旨在评估更接近最大观察到的物理花粉传输距离的风授粉。利用父系遗传的微卫星标记和最大似然估计结合蒙特卡罗评估参数不确定性，研究了一个高度隔离的伊比利亚欧洲赤松残遗种中有效花粉传入的起源。结果表明，来自 100 公里外的一个大种群的有效花粉流显著（高达 4.4%），表明可存活的松树花粉的众所周知的中尺度空气传播可以导致比以前报道的风授粉树种更大规模的成功授粉。本研究支持这样一种观点，即记录的潜在有效风花粉传播范围之间的差距可能无法准确反映生物现实。扩大有效风授粉的预期范围对评估广泛的生态和进化过程具有影响，包括在碎片化或殖民化过程中的生殖保证、复种群连通性以及在异质生境中与本地适应的相互作用。
