Restoration of Ormesby Broad Through Biomanipulation: Ecological, Technical and Sociological Issues

Tomlinson, Mark L.; Perrow, Martin R.; Hoare, D. S.; Pitt, Jo-Anne; Johnson, Samuel G. B.; Wilson, C.; Alborough, D.

doi:10.1002/9780470995679.ch15

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…The temporal resolution of the samples makes the interpretation of change over the last 40 years difficult. However, the biomanipulation and restoration of the Broad that occurred in 1990 (Tomlinson et al, 2002) are reflected in the replacement of the smaller bodied D. hyalina with the larger D. magna and Daphnia pulex (De Geer) from the 1990s onwards. Furthermore, the recovery in macrophyte abundance (Hoare et al, unpublished data) is reflected by a small increase in the relative abundance of plant-associated taxa including E. lamellatus and Pleuroxus spp.…”

Section: Discussionmentioning

confidence: 98%

“…In addition, the large-bodied plant-associated chydorid Eurycercus lamellatus (Müller) increased in proportion in the upper-most samples as did the smaller Pleuroxus taxa. Biomanipulation of the site took place in 1990 (Tomlinson et al, 2002) and some recovery in macrophyte abundance has been observed. The appearance of plant-associated taxa, particularly the large-bodied Fig.…”

Section: Comparing Macrofossils and Cladoceran Sub-fossilsmentioning

confidence: 94%

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The role of cladocerans in tracking long-term change in shallow lake trophic status

et al. 2011

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Shallow lakes have been affected by a variety of human activities profoundly altering their ecological structure and function. Cladocerans have been used to track change resulting from a variety of drivers at a number of time scales. Aquatic macrophytes are well recognised as reflecting the ecological condition of a lake. Here, we compare the plant macrofossils with the sub-fossil cladoceran assemblages from 20 dated sediment cores. Co-correspondence analysis was used to determine the degree of commonality of change in community composition of the two biological groups through time. This analysis revealed very high levels of agreement in the nature and timing of change at all the sites examined with very high correlation coefficients between the axis 1 scores for macrofossils and cladocerans. Furthermore, at all sites a high proportion of the variance (min 20%, max 54%) in the macrofossil data was explained by the change in the cladoceran assemblage. Sub-fossil macrofossil and cladoceran assemblages, from at least from 1700 AD onwards, were examined in more detail at three sites: Ormesby Great Broad, Felbrigg Lake and Lake Søbygaard. There was very good accord in the main shifts of the cladoceran and macrofossil assemblages at all three sites. This may reflect the long-term shift in the principal focus of primary production from the benthic to the pelagic habitat. We suggest that the combination of their central position in the food-web and the presence of both pelagic and benthic taxa make cladocerans a strong candidate as the single best indicator of (palaeo) ecological condition related to changing trophic status and alteration in food-web structure in shallow lakes.

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Section: Discussionmentioning

confidence: 98%

Section: Comparing Macrofossils and Cladoceran Sub-fossilsmentioning

confidence: 94%

The role of cladocerans in tracking long-term change in shallow lake trophic status

et al. 2011

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“…Benndorf et al (2002) have provided a useful review of lake criteria for biomanipulation, and managers are directed particularly to practical guides (Moss et al 1996) and relevant research papers Holzer et al 1997b;Matveev 1998;Xie and Liu 2001;Benndorf et al 2002;Lathrop et al 2002;Tomlinson et al 2002;Angeler et al 2003;Lauridsen et al 2003;Mehner et al 2004;Jeppesen et al 2005) that are available to assist wetland managers in making decisions on shallow lake restorations.…”

Section: Sum Of Experiencementioning

confidence: 99%