Response of a Grassland Cactus to Frequency and Size of Rainfall Events in a North American Shortgrass Steppe

1 Field experiments were conducted to define the types of rainfall that most effectively contribute to the water resource of a grassland cactus, Opuntia polyacantha in a shortgrass steppe. 2 The study indicated that O. polyacantha is capable of responding to rain events as small as 2.5 cm although a...

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Veröffentlicht in:Journal of Ecology. - Cambridge University Press, 1913. - 84(1996), 2, Seite 177-183
1. Verfasser: Dougherty, R. L. (VerfasserIn)
Weitere Verfasser: Lauenroth, W. K., Singh, J. S.
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1996
Zugriff auf das übergeordnete Werk:Journal of Ecology
Schlagworte:cladodes Opuntia water content Biological sciences Environmental studies Physical sciences
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520 |a 1 Field experiments were conducted to define the types of rainfall that most effectively contribute to the water resource of a grassland cactus, Opuntia polyacantha in a shortgrass steppe. 2 The study indicated that O. polyacantha is capable of responding to rain events as small as 2.5 cm although a 10-mm event has considerably more value than a 2.5-mm or a 5-mm event. 3 Water content of the cladodes was closely related to recent rainfall, and shoot growth was greatly influenced by cladode water content. 4 Results indicate that this cactus utilizes small rainfall events (2.5-5 mm), and that its success in the short term depends more on the frequency of usable rain than on rain amount. 
540 |a Copyright 1996 British Ecological Society 
650 4 |a cladodes 
650 4 |a Opuntia 
650 4 |a water content 
650 4 |a Biological sciences  |x Biology  |x Zoology  |x Animals  |x Invertebrates  |x Arthropods  |x Insects  |x Beetles  |x Cladodes 
650 4 |a Environmental studies  |x Atmospheric sciences  |x Meteorology  |x Hydrometeorology  |x Precipitation  |x Rain 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plants  |x Succulent plants  |x Cactus 
650 4 |a Biological sciences  |x Agriculture  |x Agricultural sciences  |x Agronomy  |x Soil science  |x Pedology  |x Soil water 
650 4 |a Physical sciences  |x Physics  |x Mechanics  |x Fluid mechanics  |x Fluid dynamics  |x Material concentration  |x Moisture content 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plants  |x Grasses 
650 4 |a Environmental studies  |x Environmental sciences  |x Natural resources  |x Soil resources 
650 4 |a Biological sciences  |x Ecology  |x Human ecology 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Topography  |x Lowlands  |x Plains 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plants 
655 4 |a research-article 
700 1 |a Lauenroth, W. K.  |e verfasserin  |4 aut 
700 1 |a Singh, J. S.  |e verfasserin  |4 aut 
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