However, initial optimism has given way to criticism as (i) the term ecotourism has been appropriated by traditional, even mass tourism, operators, (ii) ecotourism appears not to be economically self-sustaining or providing the expected benefits [19], [21], and (iii) negative impacts of visitors on wildlife and local communities have been documented [8], [22] [27].
This study demonstrates that the potential impacts of visitor activity can be minimised through a combination of a number of management measures including the safeguarding of core areas as refuges, the use of suitably-located and well-marked trails and viewing points, and limited times of access.
There has been conflicting evidence about the impact of visitors on zoo animals.
This reflects a wider trend, meaning that the true impact of visitors' decisions to stay away, made in March or April, will only be felt in the summer.
The physiological impact of visitors on the monkeys was then investigated by assessing the levels of urinary cortisol in samples collected when no visitors were in the zoo and throughout the year when visitor density fluctuated widely.
Vermont tourism officials say they have no estimates of the impact of visitors who come for civil unions; it would seem to be small -- out of a yearly total of four million visitors -- but palpable.
The organizations hope to conduct a thorough assessment of its wildlife and to measure the impact of visitors in the hope of finding a way to minimize human disturbances.
In studying the impact of visitors on CT crime levels, we can imagine a mathematical function with more visitors producing more crimes up to a point, after which visitors create sufficient guardianship to produce something of a downward turn.
This implies that the impact of visitors on crime begins with a good upward slope, but then begins to taper off as the number of visitors reaches higher levels.
The idea that you could tax tourists six ways to Sunday because they weren't going to vote in your election was countered with hard numbers showing the impact of visitors, not just on direct jobs with airlines, hotels and car rental agencies, but the local businesses that were supported by travelers.
This huge exhibition makes a large impact on visitors as massive evidence of the hundreds of species that have originated and gone extinct through the 541 million of years of the Phanerozoic (Fig. 3).
