The phrase "availability of occurrence" is correct and usable in written English.
It can be used in contexts where you are discussing the likelihood or presence of an event or situation happening.
Example: "The availability of occurrence of rare species in this region is crucial for our research."
Alternatives: "likelihood of occurrence" or "presence of occurrence".
Marked improvements have also been made in availability of species occurrence data thanks in large part to development of distributed biodiversity data resources [28] [31].
We chose these species based on the availability of networked occurrence data and detailed phylogeographic predictions for refugia, and we restricted ourselves to North America because of the relatively well-established understanding of its paleoclimate.
In the case of H. longicornis, our models were likely compromised by uneven availability of known occurrences across the calibration region of the species, particularly in China (Fig. 1).
One of the benefits of the HAART program with regard to human resources is that the availability of HAART prevents occurrence of opportunistic infection (OIs).
Despite the growing availability of PCPs environmental occurrence data, few studies have directly addressed the potential human health relevance of these and other nonregulated xenobiotics in wastewater and wastewater-affected receiving waters.
The most important parameters to define a contaminated site are: biodegradability, contaminant distribution, chemical reactivity of the contaminants, soil type and properties, oxygen availability and occurrence of inhibitory substances (Martín et al. [2004]).
Because it is at extensive spatial scales that climate becomes more important than other factors, such as habitat availability, in determining species' patterns of occurrence, species' distributions also should be modelled at the scale of sub-continental or continental regions.
Other factors – like the availability of water, the increasing occurrence of high and low temperature swings and the impact of stress on plant health – may outweigh the benefits of a CO2 boost.
Excessive and inappropriate use of antimicrobial agents has long been acknowledged as a driver for the emergence of resistant strains of bacteria, and there is a correlation between the availability of an antimicrobial and occurrence of resistance within a microbial population [ 12- 15].
Second, virus population size naturally tends to fluctuate, sometimes by several orders of magnitude [ 19- 21]; e.g., virus population size will necessarily vary due to changing availability of susceptible host individuals, occurrence of transmission bottlenecks when initiating a new infection, and immunity-related fluctuations in within-host viral load.
