Database Reference
In-Depth Information
1: ADULT UNFED
2: ADULT FED
3: ADULT REST
4: ADULT OVIPOS…
5: DEER MODEL F…
1:
90.00
2:
3:
500.00
4:
300.00
5:
30.00
1:
45.00
2:
3:
250.00
3
4:
150.00
5:
15.00
3
3
3
1:
2:
0.00
3:
0.00
5
4:
0.00
5
5
5
4
1
2
4
1
2
4
1
2
4
1
2
5:
0.00
0.00
208.00
416.00
624.00
832.00
Fig. 7.17
1: TOTAL ACTIVE NYMPHS YEAR
2: TOTAL ACTIVE NYMPHS YEAR 2
3: ACORN MAST INDEX
1:
900.00
2:
4000.00
3:
140.00
1:
450.00
2:
2000.00
3:
70.00
1:
0.00
2:
0.00
1
2
1
2
1
2
1
2
3
3
3
3
3:
0.00
0.00
208.00
416.00
624.00
832.00
Fig. 7.18
two years, one population of ticks may crash or remain very low, whereas the other
population maintains high numbers. As you run the model, you can see that pop-
ulation 1 benefits from the black oak mast, whereas population 2 maintains lower
population numbers or crashes.
How about a combination? Because black oak masts are larger than white oak
masts, a 50-50 species composition may still favor the tick population synchronous
with the 2-year black oak mast. Even with white oak at 75%, population 2 crashes.
At 100% white oak composition, you can see that the 3-year cycle of large masts
benefits both tick populations. However, also note the beneficial effect on active
nymphs not only 2 years after the mast event, but 3 years after the mast event.
 
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