A Guide to the Vegetation of Britain and Europe.

Fitter, A. H.; Polunin, Oleg; Walters, M.A.

doi:10.2307/2404050

Cited by 28 publications

(5 citation statements)

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“…In the laboratory, each zooplankton sample was made up to 100 mL with 4% formalin solution and thoroughly mixed before withdrawing a 500 mL sub-sample with a wide-bore, automatic pipette. The sub-sample was emptied into a Sedgewick Rafter counting chamber, and all organisms were identified to the lowest practicable taxonomic level (Scourfield and Harding, 1966;Fitter and Manuel, 1986) and enumerated using a binocular microscope. Three sub-samples were analysed for each zooplankton sample, with the numbers of organisms enumerated always within the range recommended by Bottrell et al (1976), with the exception of winter samples when zooplankton were scarce.…”

Section: Methodsmentioning

confidence: 99%

Benefits to 0+ fishes of connecting man‐made waterbodies to the lower River Trent, England

Nunn

Harvey

Cowx

2007

River Research & Apps

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Floodplain waterbodies are reputed to enhance recruitment of riverine fish populations via provision of spawning and nursery habitat, refuge from floods, and increased availability of planktonic food resources compared with main river channels. Notwithstanding, there have been few parallel studies of fishes and their food resources at both main river and floodplain sites. Thus, this study investigated the 0þ fishes, zooplankton and phytoplankton (chlorophyll a) at four main river and four (man-made) floodplain sites on the lower River Trent, England, between May 1999 and October 2004 inclusive. All sites shared the same key fish species, and there were no consistent differences in the densities, growth or condition of 0þ fishes from main river and floodplain sites. Similarly, all sites shared the same key zooplankton taxa. However, zooplankton densities, notably of large-bodied cladocerans, and chlorophyll a concentrations, were significantly higher at floodplain sites than at main river sites. Thus, connection of man-made waterbodies has the potential to enhance recruitment of riverine fish populations via provision of important spawning and nursery habitat, and superior feeding opportunities for 0þ fishes compared with main river channels.

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Section: Methodsmentioning

confidence: 99%

Benefits to 0+ fishes of connecting man‐made waterbodies to the lower River Trent, England

Nunn

Harvey

Cowx

2007

River Research & Apps

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“…' Williams, 1983 'There is no point at which a definitive line can be drawn between a pond and a lake or even between a puddle and a pond.' Fitter and Manuel, 1986 '. .…”

Section: Appendix 1: Definitions Of Pondsmentioning

confidence: 99%

“…' Clegg, 1974 'A pond, then, is likely to be a small body of water, shallow enough for plants rooted on the bottom to grow all over it (though this also depends on the clarity of the water) and to ensure a fairly even temperature throughout.' Fitter and Manuel, 1986 '. .…”

Section: Appendix 1: Definitions Of Pondsmentioning

confidence: 99%

15 years of pond assessment in Britain: results and lessons learned from the work of Pond Conservation

Biggs

Williams

Whitfield

et al. 2005

Aquatic Conservation

370

270

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ABSTRACT1. In 1986 work began which led to the foundation of Pond Conservation, the UK NGO which promotes the conservation of ponds and other freshwater habitats. In 1989 the organization initiated the UK National Pond Survey (NPS) to provide baseline data on the biota and physico-chemical characteristics of ponds.2. Survey data have been used to demonstrate the importance of small water bodies for freshwater plants and animals, to establish techniques for assessing the ecological status of ponds and to provide the basis for a new national pond monitoring network in the UK.3. Comparisons with extensive river and lake datasets show that, at a UK level, ponds support slightly more macroinvertebrate species than rivers, and more uncommon species. They support similar numbers of wetland plants to lakes. Farmland ponds generally have lower site diversity than rivers; however, in terms of regional diversity they make a greater contribution than other aquatic habitats.4. Although ponds are an important biodiversity resource, studies have shown that ponds outside nature reserves are significantly degraded: thus ponds in the lowlands supported only half the number of wetland plant species that would be expected in minimally impaired ponds.5. The environmental factors most highly correlated with species number and rarity in minimally impaired ponds were area, isolation, pH (and the related chemical measures alkalinity, calcium, conductivity) and abundance of vegetation.6. Studies of degraded ponds showed strong negative relationships between potentially damaging environmental factors (e.g. intensive land use, nutrient levels) and species richness and rarity.7. Although considerable progress has been made in characterizing the plant and invertebrate assemblages of ponds, comparatively little is known about the way ponds function or how they are affected by management. Given the importance of ponds in maintaining aquatic biodiversity at the landscape scale, further research is needed on ponds in the catchment context.

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“…Moreover, only one species, Psychoda, favoured productive sediments. This species is typical of eutrophic and polluted waters (Fitter & Manuel, 1986). The pH ranged between 7.2 and 8.6 in the lake, in which some species showed optima around pH 8.…”

Section: Discussionmentioning

confidence: 89%

Benthos of Lake Mikri Prespa (North Greece)

Petridis¹,

Sinis

1995

Hydrobiologia

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An extensive sampling of Lake Mikri Prespa was carried out in summer 1990, aimed at evaluating benthic abundance, recording the species involved and detecting their response to some environmental variables. Three oligochaete species are endemic to the region, Potamothrixprespaensis, Psammoo,ctides ochridanus variabilis and Psammoo'ctides ochridanus typica. The bathymetric curve of the benthos resembles that of eutrophic lakes. A great abundance of Chironomus plumosus and Chaoborusflavicans occurred. Four community patterns were revealed by TWINSPAN analysis, division level two, explicitly discriminated by the influence of substrate type, depth, C/N ratio and pH. Species richness and diversity was minimal in the profundal and maximal in the shallows, whilst the equitability index was high in all site groups. Depth and bottom type were the most important variables in defining species distribution. More precisely, Chironomus plumosus, Chaoborus flavicans and Pommothix hammoniensis were ubiquitous, preferring mostly deep waters. Tanymrsus sp., Einfeldia dissidens, Cladopelma lateralis, Tanypus ptmctipemlis and Potamothrix prespaensis favoured shallower and less productive waters with a bottom rich in decaying plant fragments, and the Psammoo,ctides species showed a littoral origin and regular occurrence on gravel beds. A few species displayed a particular distribution with changes of depth, C/N ratio and pH.

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A Guide to the Vegetation of Britain and Europe.

Cited by 28 publications

References 0 publications

Benefits to 0+ fishes of connecting man‐made waterbodies to the lower River Trent, England

Benefits to 0+ fishes of connecting man‐made waterbodies to the lower River Trent, England

15 years of pond assessment in Britain: results and lessons learned from the work of Pond Conservation

Benthos of Lake Mikri Prespa (North Greece)

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