Odonatological Abstracts

(14678) BARNES, L.E., 1983. The colonization of ball-clay ponds by macroinvertebrates and macrophytes. Freshw. Biol. 13:561-578. — (Author’s current address unknown). The rate and nature of colonization were studied at the Isle of Purbeck, Dorset, UK by comparing communities present in a series of 10 ponds of similar dimensions, but of different ages, ranging from 6 months to 15 yr. Multivariate analyses distinguished between ‘neutral’ and ‘acid’ ponds. Low pH affected colonization by preventing the establishment of acid-intolerant immigrant spp., and by retarding succession. Sequence of arrival of 9 odon. spp. in neutral ponds is shown and the odon. occurrence is discussed. (14679) MRAKlC, J. Sc B. VOMER, 1983. Raziskave Gozdnega rezervata Lovrenska jezera. — [Studies in the "Lovrenska jezera” Forest Reserve], Graduation thesis, Dept Forestry, Biotech. Fac., Univ. Ljubljana. vii+112 pp., 3 maps excl. (Slovene). — (Authors’ current addresses unknown). On p. 99 appears an Aeshna juncea phot., taken in the Reserve; — Pohorje Mts, Slovenia.