By Donna A. Lehman (auth.), John T. Lehman (eds.)
The concept for this ebook was once born on the June 1996 assembly of the precise guidance Committee in Milwaukee, Wisconsin. We had simply accomplished a winning and stimulating precise symposium in the course of the annual assembly of the yankee Society for Limnology and Oceanography, and exuberance was once operating excessive for the creation of a quantity that may gather in a single position the clinical findings that have been commencing to emerge from East Africa. excellent, a world Decade for the East African Lakes, had ended one around of box investigations, a lot of which have been established on Lake Victoria. because the climatologists, geologists, paleolimnologists, and biologists displayed their effects and debated interpretations, it seemed that a few paradigms have been transferring, and that new motives of weather background and modem methods have been taking form. The guidance Committee counseled the creation of a quantity that will draw jointly different examine effects that have been rising and which might be consultant of the scope of technology matters that exist inside of excellent. This ebook follows within the spirit of The Limnology, Climatology, and Paleoclimatology of the East African Lakes, released in 1996, yet has a slightly various goal. the former e-book additionally incorporated unique technological know-how effects, however it was once conceived to check the kingdom of data, establish serious difficulties, and element to new paths of inquiry. It followed the advance of our first technological know-how and Implementation Plan for the East African Lakes.
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Extra resources for Environmental Change and Response in East African Lakes
Lacustris) tend to be more prevalent in large African lakes when mixing is reduced (TaIling 1966; Haberyan and Mhone 1991; Owen and Crossley 1992), and attenuate Nitzschia have been found enmeshed in Lake Victoria's cyanobacterial blooms during thermal stratification (Ochumba and Kibaara 1989). Small N. fonticola Grun. are often epiphytic on cyanobacteria and are commonly found growing on Microcystis in the lake today (Kilham et al. 1986; Haberyan and Hecky 1987; H. Kling personal communication 1995).
Victoriae (Fig. 1b, Zone C). The change coincided with a continental-scale switch from exceptionally humid conditions to more seasonal precipitation and mixing regimes in tropical Africa (Kendall1969; Nicholson and Flohn 1980; Maley 1982; Stager et al. 1997). Figure 2. Percentages of Total Aulacoseira (a) and Total Nitv;chia (b). with 14C and calendar year scales. 0 ka were magnified by a rise in benthic, littoral taxa (c) during the arid Little Ice Age (LIA) interval. 5 cm intervals; gaps in series represent sediments lost in core pipe couplings.
C. STAGER MathlScience Division, Paul Smith's College Paul Smiths, NY 12970, USA and Climate Change Research Center, University of New Hampshire Durham, NH 03824, USA 1. Abstract Fine-interval (-29-35 14C year) diatom analysis of a sediment core from northern Lake Victoria provides a long-term context for recent environmental changes in the lake, which include increased water column stability, a switch from Aulacoseira- to Nitzschia-dominated diatom assemblages, and an overall increase in cyanobacteria relative to diatoms.
Environmental Change and Response in East African Lakes by Donna A. Lehman (auth.), John T. Lehman (eds.)