Soil seed bank of an upland calcareous grassland after 6 years of climate and management manipulations
Soil seed bank of an upland calcareous grassland after 6 years of climate and management manipulations
复制标题
DOI：
10.1046/j.1365-2664.1998.3540544.x
复制
发表时间：
1998-08-01
影响因子：
5.7
通讯作者：
Buckland, SM
中科院分区：
文献类型：
--
作者：
Akinola, MO;Thompson, K;Buckland, SM
1.对石灰岩草地土壤种子库进行了6年的温度、降雨、肥力和干扰调控研究。此外，还在实验中加入了外来物种的种子。种子库主要由原产于该地点的物种组成，种子小而持久。种子大的物种，无论是本地的还是引进的。在种子库中很少见或不存在。小种子物种一般比大种子物种埋藏得更深。总种子密度与其他石灰岩草地相当。夏季干旱增加了冬季一年生拟南芥的种子库，冬季高温增加了樱桃的种子库，但对气候的影响较小。当地树种的种子密度随着干扰和肥力处理的增加而下降，而引进树种的种子密度则增加。种子库的变化滞后于植被的变化，经过6年的管理，引进物种在植被中所占的比例高于种子库。
1. The soil seed bank of limestone grassland plots was investigated after 6 years of manipulation of temperature, rainfall, fertility and disturbance. An inoculum of seeds of species alien to the site was also added to the experiment.2. The seed bank was largely made up of species that were native to the site and had small, persistent seeds. Large-seeded species, whether native or introduced. were rare or absent in the seed bank. Small-seeded species were generally more deeply buried than large-seeded species. Total seed density was comparable with that of other limestone grasslands.3. Significant climate effects were few, although the seed bank of the winter annual Arabidopsis thaliana was increased by summer drought and that of Cerastium fontanum was increased by winter heating.4. The density of seeds of native species declined in response to disturbance and increased fertility treatments, while that of introduced species increased. Changes in the seed bank lagged behind changes ill the vegetation, with introduced species making up a higher proportion of the vegetation than of the seed bank after 6 years of manipulation.