We were unable to assess whether there might be differential health needs in the two groups we compared, in which case differences in service utilization could be a sampling artifact.
There are good reasons why species may be naturally rare [10], but in many cases this rarity may be a sampling artifact.
They noted a correlation between detrended diversity of short-lived genera and sedimentary rock-outcrop area from the Upper Triassic to the Middle Eocene, suggesting that [1]'s 62 Myr signal may be a sampling artifact.
Although precautions were taken to minimize sulfide oxidation during sediment processing, the finite background concentration below 5 cm (0.7±0.3 mM) may be a sampling artifact; hence, measured sulfate reduction rates below 5 cm may overestimate in situ rates.
However, the minor differences observed may be a sampling artifact with these species sharing a common gene pool.
Although our sample size of wild H. spontaneum in the western part of its distribution area is relatively low, the lack of old and dominating haplotypes is unlikely to be a sampling artifact, as our sampling was conducted randomly.
stipitis and D. hansenii) with the RdRp gene of exogenous Totivirus of other hemiascomycetes, such as S. cerevisiae, is unlikely to be a sampling artifact or a differential gene loss of Totivirus-like genes in fungi.
As with most EST studies, we cannot rule out the possibility that the apparent over-representation might be a sampling artifact due to non-normalized cDNA or incomplete coverage.
Limited sampling effort in MEF raises the possibility that the preponderance of black bear sign there was a sampling artifact.
