| Popis: |
1. Scope and methods of the investigation Invertebrates were collected at thirty stations covering, as far as circumstances permitted, the principal habitat types of the island. The distribution of these stations is shown in figure 49. The time available at each station varied, so that care must be exercised in comparing the results. Collecting was in all cases by hand, and no quantitative sampling was attempted. The most thorough collecting was carried out in the Stony Beach area (stations 23 to 28), at Cave Point and Hackel Hill (17 and 19), west of the Settlement (5), east of the new volcano (1 to 3) and at stations 7 and 12 in the highland zone. To assess the effect of the volcano a comparison may be made between the results of collecting: ( a ) In the severely affected area very close to the new cone, which was covered with ash and showed maximum damage to the vegetation (stations 1 to 4, and 11). ( b ) In the mildly affected coastal region in and around the Settlement itself, where the fauna was initially very similar to that in the area of maximum damage (stations 5 and 6). ( c ) In the comparable but unaffected area between Stony Beach and Hackel Hill (stations 17 to 28) and at Sandy Point (stations 8 and 9). ( d ) In the highland zone embracing the whole area of the Base and the Peak with more or less undamaged and natural vegetation (stations 7, 10, 12 to 15, and 29). The collected material so far identified from these four groups of stations is listed in table 35. |
