For either kind of reduction in diversity to occur, the population budding process must be rapid, or diversity will build up again.
Furthermore, one of the two brittle rachis regions marking the early domestication process (BRT-3B8) showed a localized sharp reduction in diversity confirmed by Fst and XP-CLR indexes.
High-throughput microarray analysis revealed temperature selections of particular AOA assemblages and a significant reduction in diversity and co-occurrence of the metabolically active AOA phylotypes.
A dramatic reduction in diversity was observed for two of the four stool samples for which antibiotic treatment was prolonged and uninterrupted.
"Could it be that, with the increasing focus on return on investment, the apparent reduction in diversity is simply the result of innovations being judged more efficiently nowadays?" asked one reader.
All these tetrapod groups suffered a sharp reduction in diversity at the close of the Permian; 75 percent of the early amphibian families and 80 percent of the early reptilian families disappeared at or near the Permian-Triassic boundary.
Planktonic foraminiferans (pseudopod-using unicellular organisms protected by a test or shell) underwent two major radiations the first in the Paleocene and the second in the Miocene punctuated by a long (15-million 20-million-year) mid-Cenozoic reduction in diversity related in all likelihood to global cooling.
So do closures, high profile failures and a reduction in diversity.
"While this transaction will result in some reduction in diversity across the Australian media landscape, we have concluded it would not substantially lessen competition," it said.
Nevertheless, for (creduction in diversity also decreases the wholesale price, which ceteris paribus reduces the nonintegrated insurers' marginal costs.
Loosely attached soil samples also showed a slight reduction in diversity compared to bulk soil, indicating that rhizosphere effects were not necessarily limited to our rhizosphere sample, but also extended into soil loosely adhered to the roots.
