. The Caribbean forester. Forests and forestry Caribbean Area Periodicals; Forests and forestry Tropics Periodicals. 48 Caribbean Forester 3000 CO M 2 0 00- UJ K t- I oooi NUMBER OF TREES/ACRE CO UJ o UJ Q. CO 20 I 5 I 0 - 5- NUMBER OF SPECIES UJ u. 70 60 50 4 0 30 20 10- 0 AVERAGE HEIGHT DOMINANTS 400 h- LU UJ 300 " LU- LU 200- oc 3 o ioo- CO 0- BASAL AREA / ACRE CO UJ X o AVERAGE DIAMETER 2000 -f- 25CO 5000 1 3500 ALTITUDE IN FEET Figure 2. Plot characteristics. were found almost everywhere below this le- vel. In order to keep slope, aspect, and other site factors not correlated with al
. The Caribbean forester. Forests and forestry Caribbean Area Periodicals; Forests and forestry Tropics Periodicals. 48 Caribbean Forester 3000 CO M 2 0 00- UJ K t- I oooi NUMBER OF TREES/ACRE CO UJ o UJ Q. CO 20 I 5 I 0 - 5- NUMBER OF SPECIES UJ u. 70 60 50 4 0 30 20 10- 0 AVERAGE HEIGHT DOMINANTS 400 h- LU UJ 300 " LU- LU 200- oc 3 o ioo- CO 0- BASAL AREA / ACRE CO UJ X o AVERAGE DIAMETER 2000 -f- 25CO 5000 1 3500 ALTITUDE IN FEET Figure 2. Plot characteristics. were found almost everywhere below this le- vel. In order to keep slope, aspect, and other site factors not correlated with alti ude con- stant, the transect line was established along a ridge line, and thus was not a straight line. Below the 3000-foot level, only small areas of land along the ridge contained the dense forest stands that were considered to be the climatic climax formation. Consider- able area had secondary vegetation growing up as a result of windfalls. Thus it was found necessary to shift the plots up or down from the desired 250-foot intervals. Thus plots were finally established at 1960, 2250, 2600, 2800, 3100, and 3350 feet. These 60 ' 50- ES 40' HO -30- 20- 10- 0 â MAXIMUM DIAMETER. 2000 2500 3000 3500 ALTITUDE IN FEET altitudes were determined by the use of an anaeroid altimeter and by checking elevations againsc points of known elevation that could be discerned on the topographic map "El Yunque, P. ; Because of the lack of time available and because of the limited area that contained the climatic climax, it was found possible to establish only two plots for the lowest three elevation levels, and only one for the upper three elevation levels. Plot size was also reduced to l/20th-acre at the 3350-foot level. It was felt that this reduction in plot area at the higher altitudes was justified because of the greater number of stems per acre. All plot trees larger than inches in diameter at breast height were tallied by. Please note that these images are extr
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