نتایج جستجو برای: plant succession
تعداد نتایج: 405037 فیلتر نتایج به سال:
In their recent review of arrested succession, Royo and Carson (A.A. Royo and W.P. Carson. 2006. Can. J. For. Res. 36: 1345–1362) demonstrate that ‘‘recalcitrant understory layers’’ are widespread and pervasive modifiers of ecosystems and disruptors of forest regeneration. They rightly point out that many plant species associated with arrested succession are characterized by rapid vegetative sp...
A conceptual model that provides a means of viewing changes in vegetation as responses to weathering of soil mantles over thousands ofyears has been developed from investigations of vegetation communities on a soil chronosequence on sand dunes extending back in time to at least the last interglacial. Progressive and retrogressive phases in natural plant succession are indicated by this sequence...
Global climate change has accelerated the pace of glacial retreat in high-latitude and high-elevation environments, exposing lands that remain devoid of vegetation for many years. The exposure of 'new' soil is particularly apparent at high elevations (5000 metres above sea level) in the Peruvian Andes, where extreme environmental conditions hinder plant colonization. Nonetheless, these seemingl...
Both local- and landscape-scale processes drive succession of secondary forests in human-modified tropical landscapes. Nonetheless, until recently successional changes in composition and diversity have been predominantly studied at the patch level. Here, we used a unique dataset with 45 randomly selected sites across a mixed-use tropical landscape in central Panama to study forest succession si...
1. Grazing by large ungulates may affect plant species richness and diversity at multiple spatial and ⁄or temporal scales, because grazing affects small-scale resource heterogeneity and plant interactions at the local scale, while effects at the landscape scale are related to grazing intensity and timing. 2. We used diversity partitioning to analyse longand short-term effects of cattle grazing ...
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