Migration of vascular plants to secondary woodlands in southern Sweden
Migration of vascular plants to secondary woodlands in southern Sweden
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DOI：
10.1046/j.1365-2745.1998.00269.x
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发表时间：
1998-06-01
影响因子：
5.5
通讯作者：
von Oheimb, G
中科院分区：
文献类型：
--
作者：
Brunet, J;von Oheimb, G
1我们研究了30 - 75年龄的古林地和现代落叶林之间的过渡带中的农田层植物的迁移。2现代林中林地物种的数量和覆盖率随着与古林地距离的增加而减少，随着现代林年龄的增加而增加。在200个物种x样地组合中，有183个物种被典型的林地植物定殖。在72个组合中，定殖前沿的特点是对数或线性下降的物种覆盖，表明建立孤立的个人和逐步填充的差距。这种模式在蚂蚁分散的物种中最常见，在具有粘性或被吞食种子的物种中不太常见。平均迁移率的基础上最大覆盖在最近的森林变化从0.00到1.00米年（-1）之间的物种，与0.30米年（-1）的中位数迁移率。根据最远个体的出现情况计算的迁移率范围为0.00至1.25 m年（-1），中位数为0.53 m年（-1）。5与具有粘附或摄入种子的物种相比，蚂蚁分散物种的迁移率较低。扩散模式之间没有差异时，发现最远的个人的迁移率进行比较。大多数计算出的迁移率（84%）超过了林地物种可能的植被蔓延率。6在次生林中建立与邻近古老林分相媲美的田间层植被的速度为c。0.3-0.5百万年-（1）。我们的结论是，温带森林管理的规模和强度应调整到相对缓慢的迁移的领域层植物群，以便能够在管理周期内完全恢复。
1 We studied the migration of field layer plants across ecotones between ancient woodlands and recent deciduous woods on former arable land varying in age between 30 and 75 years.2 Number and percentage cover of woodland species in recent woods decreased with increasing distance to the ancient woods, and increased with the age of the recent woods, indicating dispersal limitation during secondary succession.3 Colonization by typical woodland plants was observed in 183 of 200 species x site combinations. In 72 combinations, a colonization front was characterized by logarithmic or linear decrease in species cover, indicating establishment of isolated individuals and gradual infill of gaps. This pattern was most common in ant-dispersed species and less frequent in species with adhesive or ingested seeds.4 Migration rates were calculated for 49 woodland species. Mean migration rates based on maximum cover in recent woods varied from 0.00 to 1.00 m year(-1) between species, with a median migration rate of 0.30 m year(-1). Migration rates calculated on occurrence of the farthest individual ranged from 0.00 to 1.25 m year(-1), with a median rate of 0.53 m year(-1).5 Ant-dispersed species had lower migration rates based on maximum cover compared with species with adhesive or ingested seeds. No differences between dispersal modes were found when comparing migration rates based on the farthest individuals. Most of the calculated migration rates (84%) exceeded the rate of possible vegetative spread of woodland species.6 Establishment of a field layer vegetation in secondary woods comparable to that of the adjacent ancient stands proceeded at a rate of c. 0.3-0.5 m year-(1). We conclude that scale and intensity of temperate forest management should be adjusted to the relatively slow migration of the field layer flora in order to enable complete recovery during a management cycle.