Just like his "Community" alter ego, Pierce Hawthorne, star Chevy Chase doesn't always know how or when to edit himself.
Selective removal of specific species and age groups in preference to others may contribute to changes in the species and size composition of fish communities, alter trophic interactions, and may lead to phenotypic or genotypic changes in harvested stocks.
Ecologists strongly suspect that such changes to trophic dynamics, particularly the loss of top predators, will have penetrating effects throughout communities, altering critical ecosystem processes and services [17], [38].
Nonnative species pose a threat to native biodiversity and can have immense impacts on biological communities, altering the function of ecosystems.
By this repertoire bacteria impact the environment since microbial communities alter bioavailability of toxic metals, such as arsenic and selenium [ 1], and degrade a large array of xenobiotic compounds [ 2].
Antibiotic sensitivity and electrophysiology experiments on a set of alanine-substitution mutants confirmed that residues located in the P-linkers, the β-hairpin, and β13 conserved patch (part of four communities) alter channel gating and that residues located in P-linker2, β12–β13_loop, and β13 conserved patch (both periplasmic end and extracellular end) are sensitive to plug displacement.
In 1977, the killing of a Mexican-American veteran by three Houston police officers sparked a violent rebellion in the Latino community that altered the conversation on community-police relations in the city.
Although there is little to no controversy surrounding evolution in the scientific community (Alters and Alters 2001), acceptance by the American public is largely lacking.
In addition, regional differences in the underlying prevalence of PSA testing in the community alters the pre-test probability for high-risk disease (Moore et al, 2009) in defined 'low-risk' cohorts, which potentially interferes with the performance of selection rules when applied to populations distinct from which they were generated.
The community was altered from one dominated by autotrophic processes to one dominated by heterotrophic processes.
