منابع مشابه
Maintenance of Species Diversity by Predation in the Tierra System
One of the ecological theories has proposed that high species diversity can be maintained by predation, and several experimental studies showed that a few predator individuals with positive frequency-dependent behavior were able to maintain the coexistence of two prey types. However, in a natural environment, when a single predator species regulates the diversity of prey species, it is likely t...
متن کاملPredation in two species of leech under laboratory conditions
Two 60 day experiments on predation behavior of leeches were conducted concurrently. In the first, medicinal leeches, Hirudo orientalis (Utevsky and Trontelj, 2005) were fed to satiation on bovine blood and subsequently transferred into two large opaque plastic containers of equal size but with differing temperatures, 6-7?C and 23-24?C, containing starved Erpobdella octoculata (L.). At the high...
متن کاملPlant Species Diversity in Gonabad
Gonabad located at Khorasan Razavi and coordinates 580 30’ N 34o 35’ E. The highest point of the zone belongs to Peak of Siah Mountain (height of 2,863 meters above sea level) and the lowest place has height of 810 meters above sea level, which is located in North West in salt desert. The mean temperature of the warmest and coldest of year is 29.3 and 3.9 respectively. Mor...
متن کاملDensity-Dependent Predation of a Dominant Species does not Facilitate Increased Diversity in Treeholes
The effects of predation on water-filled treehole communities in North Carolina were examined using mesocosm experiments and observations in natural treeholes. The presence of the predator Toxorhynchites rutilus and leaf litter abundance were manipulated in mesocosms to examine interactions between resources and predation. Long-term examination of interactions in unmanipulated treeholes provide...
متن کاملPlant Species Diversity in Gonabad
Gonabad located at Khorasan Razavi and coordinates 580 30’ N 34o 35’ E. The highest point of the zone belongs to Peak of Siah Mountain (height of 2,863 meters above sea level) and the lowest place has height of 810 meters above sea level, which is located in North West in salt desert. The mean temperature of the warmest and coldest of year is 29.3 and 3.9 respectively. Mor...
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ژورنال
عنوان ژورنال: Ecology
سال: 2007
ISSN: 0012-9658
DOI: 10.1890/06-1507.1