Dissertation/Thesis Abstract

Life histories, diets, and secondary production of Odonata along a temperature gradient on the Copper River Delta, Alaska
by Furlan, Nicole E., M.S., Loyola University Chicago, 2014, 79; 1583231
Abstract (Summary)

Dragonflies (Odonata: Epiprocta) and damselflies (Odonata: Zygoptera) are a conspicuous aspect of the biota in ponds on southcentral Alaska's Copper River Delta (CRD). Odonate densities, secondary production, and diets were assessed in sixteen ponds classified by delta region (east vs. west) and landscape type (outwash plain (OP) vs uplifted marsh (UM)).

Enallagma boreale (Coenagrionidae) comprised 48.5% of collected odonates. Leucorrhinia hudsonica (Libellulidae) and Aeshna juncea (Aeshnidae) comprised 36.6% and 10.4% of collected odonates, respectively. L. hudsonica densities and secondary production were significantly higher (p<0.001) in west UM ponds than in other pond types. Ostracods (Ostracoda) and water boatmen (Corixidae) dominated west OP A. juncea diets. Midge larvae (Chironomidae) dominated A. juncea diets in remaining pond types, occurring in 68% of foreguts. 27% of A. juncea foreguts demonstrated intraguild predation, and 6% of foreguts demonstrated cannibalism. Foreguts containing threespine stickleback (Gasterosteus aculeatus) revealed A. juncea's apex predator role in CRD ponds.

Indexing (document details)
Advisor: Berg, Martin B.
Commitee: Hoellein, Timothy J., Kelly, John J.
School: Loyola University Chicago
Department: Biology
School Location: United States -- Illinois
Source: MAI 54/03M(E), Masters Abstracts International
Subjects: Ecology
Publication Number: 1583231
ISBN: 978-1-321-53885-4
Copyright © 2020 ProQuest LLC. All rights reserved. Terms and Conditions Privacy Policy Cookie Policy