ecology of phasmids - KLUEDO - Universität Kaiserslautern
ecology of phasmids - KLUEDO - Universität Kaiserslautern
ecology of phasmids - KLUEDO - Universität Kaiserslautern
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Community structure & host range 20<br />
Table 2-2: Niche breadth and niche overlap <strong>of</strong> four common and one rare (Otocrania sp.) phasmid species on BCI<br />
based on individuals recorded on potential host plant families in line-transects (N = 279).<br />
Levin’s standardized niche<br />
breadth BA<br />
No. <strong>of</strong> phasmid individuals<br />
recorded on plants<br />
Oncotophasma<br />
martini<br />
Bacteria<br />
ploiaria<br />
Metriophasma<br />
diocles<br />
Otocrania<br />
sp.<br />
Isagoras<br />
dentipes<br />
0.31 0.40 0.33 0 0.10<br />
104 53 51 3 68<br />
No. <strong>of</strong> potential host plant families 5 7 6 1 2<br />
Pianka’s niche overlap Ojk<br />
Oncotophasma martini 0.27 0.17 0.01 0.91<br />
Bacteria ploiaria 0.18 0.19 0.03<br />
Metriophasma diocles 0.17 0.08<br />
Otocrania sp. 0<br />
no. <strong>of</strong> plant families<br />
10<br />
9<br />
8<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
0.5 0.7<br />
Oncotophasma martini Bacteria ploiaria Metriophasma diocles Otocrania sp.<br />
host plant families accepted in feeding trials plant families in both (overlap)<br />
potential host plant families recorded in line-transects<br />
Figure 2-4: Number <strong>of</strong> plant families composing realized (potential host plant families recorded along line-<br />
transects) and absolute dimension <strong>of</strong> the food niche (host plant families accepted in feeding trials) <strong>of</strong> selected<br />
phasmid species. The overlap between realized and absolute food niche is expressed by Sørensen’s index <strong>of</strong><br />
Similarity SS (values given above the bars). Note that this index does not weigh relative use <strong>of</strong> host plant families.<br />
0.5<br />
1