نتایج جستجو برای: diversity of litter invertebrates
تعداد نتایج: 21183315 فیلتر نتایج به سال:
the raini cashmere goat is one of the iranian goat breeds with a high economic value on international markets due to its high production and high quality. the bmp15 gene regulates granulose cell proliferation and differentiation by promoting granulosa cell mitosis, suppressing follicle-stimulating hormone receptor expression, and stimulating the kit ligand expression. this gene plays a pivotal ...
It has previously been thought that there was a steep Cretaceous and Cenozoic radiation of marine invertebrates. This pattern can be replicated with a new data set of fossil occurrences representing 3.5 million specimens, but only when older analytical protocols are used. Moreover, analyses that employ sampling standardization and more robust counting methods show a modest rise in diversity wit...
LIKE MUCH OF THE WESTERN UNITED STATES, California’s forest has been severely altered by a century of fire suppression. The Sierra Nevada’s largest forest type, mixed conifer, which is primary habitat for more vertebrate species than any other Californian forest community, historically burned every 12–17 years. In 1894, John Muir wrote “The inviting openness of the Sierra woods is one of their ...
J. S. Kominoski ([email protected]) and C. M. Pringle, Odum School of Ecology, Univ. of Georgia, Athens, GA 30602, USA. Present address for JSK: Dept of Forest Sciences, Univ. of British Columbia, 3041-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada. ! T. J. Hoellein, Dept of Biological Sciences, Univ. of Notre Dame, Notre Dame, IN 46556, USA. Present address for TJH: Dept of Natural Sciences...
Semi-natural grassland communities are of great interest in conservation because of their high species richness. These communities are being threatened by both land abandonment and nitrogen eutrophication, and their continued existence will depend upon correct management. However, there is a distinct lack of studies of the ecological mechanisms that regulate species diversity and productivity i...
Semi-natural calcareous grasslands are of great interest in conservation because of their high species richness, but presently they are threatened by both land abandonment and nitrogen eutrophication. The paper reports on a three-year field experiment conducted in a species-rich Mediterranean grassland to study the effects of nitrogen application coupled with removal of plant litter and artific...
The effects of the application of poultry litter at 0.0, 6.7, 13.4, and 20.1 tons/ha on population changes during the growing season on nematode communities were evaluated in two cotton production fields in North Carolina. Numbers of bactivorous nematodes increased at midseason in response to the rate at which litter was applied but decreased with increasing litter application rates at cotton h...
The issue of endocrine disruption (ED) in invertebrates has generated remarkably little interest in the past compared to research with aquatic vertebrates in this area. However, with more than 95% of all known species in the animal kingdom, invertebrates constitute a very important part of the global biodiversity with key species for the structure and function of aquatic and terrestrial ecosyst...
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