The phrase "abundance has changed" is correct and usable in written English.
You can use it when discussing a shift or transformation in the level or nature of abundance in a particular context, such as economics, resources, or personal circumstances.
Example: "Over the past decade, the abundance has changed significantly, leading to new challenges and opportunities for local farmers."
Alternatives: "the level of abundance has shifted" or "the nature of abundance has evolved."
Dozens of other scientists have used the collection to study how birds' feeding habits, distribution and abundance have changed over the past 100 years.
The small number of genes whose relative abundance had changed indicates that the mutation in S9 has minor effects on the transcriptome profile of the parental strain.
To assess differential expression, EBSeq [ 101] was used to identify genes for which transcript abundance had changed significantly between the two experimental conditions for each tissue.
Nevertheless the abundance of crabs has changed markedly over time even on this ∼1.6 km2 island as a result of depredations by introduced mammals.
However, our culture has changed and most Americans now live in a time of abundance.
We used long-term data to: (1) explore variation in bird communities as a function of water permanence and degree of human-modification; (2) identify which environmental variables best describe differences found across riparian site types; and (3) assess how riparian bird communities, abundance, and species richness have changed through time.
This information was used to understand how lobster abundance, catch and effort have changed in the archipelago during the last 40 years and was used during development of spatial dynamics for the model described below.
Equally critical for establishing conservation goals and management directives, however, is information on how the abundances of key species have changed historically, under both natural and human-influenced environmental regimes [17] [19].
Despite complete canopy loss, total crab abundance has not changed significantly (in contrast to biomass) and all 12 species found in the forest were also found in the gaps, demonstrating their robustness.
Among these proteins, three (NADP-dependent malic enzyme, triosephosphate isomerase and probable 6-phosphogluconolactonase 2) are associated with fruit respiration and may have changed in abundance due to the respiratory burst at H20 (Table 2a).
