منابع مشابه
Experimental Evaluation of Seed Limitation in Alpine Snowbed Plants
BACKGROUND The distribution and abundance of plants is controlled by the availability of seeds and of sites suitable for establishment. The relative importance of these two constraints is still contentious and possibly varies among species and ecosystems. In alpine landscapes, the role of seed limitation has traditionally been neglected, and the role of abiotic gradients emphasized. METHODOLO...
متن کاملThe seed bank longevity index revisited: limited reliability evident from a burial experiment and database analyses.
BACKGROUND AND AIMS Seed survival in the soil contributes to population persistence and community diversity, creating a need for reliable measures of soil seed bank persistence. Several methods estimate soil seed bank persistence, most of which count seedlings emerging from soil samples. Seasonality, depth distribution and presence (or absence) in vegetation are then used to classify a species'...
متن کاملClimate warming could shift the timing of seed germination in alpine plants.
BACKGROUND AND AIMS Despite the considerable number of studies on the impacts of climate change on alpine plants, there have been few attempts to investigate its effect on regeneration. Recruitment from seeds is a key event in the life-history of plants, affecting their spread and evolution and seasonal changes in climate will inevitably affect recruitment success. Here, an investigation was ma...
متن کاملBurial increases seed longevity of two Artemisia tridentata (Asteraceae) subspecies.
PREMISE OF THE STUDY Seed longevity and persistence in soil seed banks may be especially important for population persistence in ecosystems where opportunities for seedling establishment and disturbance are unpredictable. The fire regime, an important driver of population dynamics in sagebrush steppe ecosystems, has been altered by exotic annual grass invasion. Soil seed banks may play an activ...
متن کاملNitrogen and carbon storage in alpine plants.
Alpine plants offer unique opportunities to study the processes and economics of nutrient storage. The short alpine growing season forces rapid completion of plant growth cycles, which in turn causes competition between vegetative and reproductive growth sinks during the early part of the growing season. Mobilization of stored nitrogen and carbon reserves facilitates competing sinks and permits...
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ژورنال
عنوان ژورنال: South of Russia: ecology, development
سال: 2014
ISSN: 2413-0958,1992-1098
DOI: 10.18470/1992-1098-2011-2-17-23