LE3 .A278 2001

2001

Taylor, Phil

Acadia University

Master of Science

Masters

Biology

Biology

Within the Gros Morne Greater Ecosystem, Newfoundland, I related the distribution of peatland Odonata to habitat measured at the spatial scales of the pool and landscape. I sampled odonate exuviae and larvae from 30 peatlands and determined habitat preferences at the scale of the bog pool for eight odonate species. For five taxa, I determined the effect of non-peatland habitat (forest, scrub, clearcut) and the amount of peatland (<20%, 25-45%, 50-70% of landscape) on their incidence using generalized linear models. Greater amounts of peatland within landscapes had positive effects on incidence of 'Aeshna sitchensis, Enallagma' spp. and 'Cordulia shurtleffi', but negative effects on 'Leucorrhinia hudsonica ' and 'Somatochlora septentrionalis'. Forest surrounding peatland had a positive effect on 'C. shurtleffi' incidence but negative effects on 'L. hudsonica' and 'Enallagma ' spp. I explain these patterns using knowledge of species' life histories and movement behaviours, and surmise how these are influencedby landscape structure.

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https://scholar.acadiau.ca/islandora/object/theses:3075