Détail de l'auteur
Auteur J. BIGGS
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la recherche
A comparison of the catchment sizes of rivers, streams, ponds, ditches and lakes: implications for protecting aquatic biodiversity in an agricultural landscape / Davies, B. R. (2008)
Titre : A comparison of the catchment sizes of rivers, streams, ponds, ditches and lakes: implications for protecting aquatic biodiversity in an agricultural landscape Type de document : texte imprimé Auteurs : B. R. Davies ; J. BIGGS ; P.-J. WILLIAMS ; J. T. Lee ; S. THOMPSON Année de publication : 2008 Article en page(s) : pp 7-17 Catégories : Ecoplanète
Agri-environment schemes ; biodiversity ; Microcatchment ; POLLUTION
Résumé : In this study we compared the biodiversity of five waterbody types (ditches, lakes, ponds, rivers and streams) within an agricultural study area in lowland England to assess their relative contribution to the plant and macroinvertebrate species richness and rarity of the region. We used a Geographical Information System (GIS) to compare the catchment areas and landuse composition for each of these waterbody types to assess the feasibility of deintensifying land to levels identified in the literature as acceptable for aquatic biota. Ponds supported the highest number of species and had the highest index of species rarity across the study area. Catchment areas associated with the different waterbody types differed significantly, with rivers having the largest average catchment sizes and ponds the smallest. The important contribution made to regional aquatic biodiversity by small waterbodies and in particular ponds, combined with their characteristically small catchment areas, means that they are amongst the most valuable, and potentially amongst the easiest, of waterbody types to protect. Given the limited area of land that may be available for the protection of aquatic biodiversity in agricultural landscapes, the deintensification of such small catchments (which can be termed microcatchments) could be an important addition to the measures used to protect aquatic biodiversity, enabling 'pockets' of high aquatic biodiversity to occur within working agricultural landscapes.
in Hydrobiologia > n°597 (2008) . - pp 7-17[article]How can we make new ponds biodiverse? A case study monitored over 7 years / WILLIAMS, P. (2008)
Titre : How can we make new ponds biodiverse? A case study monitored over 7 years Type de document : texte imprimé Auteurs : P. WILLIAMS ; M. WHITFIELD ; J. BIGGS Année de publication : 2008 Article en page(s) : pp 137-148 Catégories : Ecoplanète
Colonisation ; Constructed ponds ; Mare de substitution ; Pond age
Résumé : A new pond complex, designed to enhance aquatic biodiversity, was monitored over a 7-year period. The Pinkhill Meadow site, located in grassland adjacent to the R. Thames, proved unusually rich in terms of its macrophyte, aquatic macroinvertebrate and wetland bird assemblages. In total, the 3.2 ha mosaic of ca. 40 permanent, semi-permanent and seasonal ponds and pools was colonized by approximately 20% of all UK wetland plant and macroinvertebrate species over the 7-year survey period. This included eight invertebrate species that are Nationally Scarce in the UK. The site supported three breeding species of wading bird and was used by an additional 54 species of waders, waterfowl and other wetland birds. The results from four monitoring ponds investigated in more detail showed that these ponds significantly supported more plant and macroinvertebrate species than both minimally impaired UK reference ponds, and other new ponds for which compatible data were available.Comparisons of the physico-chemical, hydrological and land-use characteristics of the Pinkhill pools with those of other new ponds showed that the site was unusual in having a high proportion of wetlands in the near surrounds. It also had significantly lower water conductivity than other ponds and a higher proportion of (non-woodland) semi-natural land in its surroundings. Given that ponds are known to contribute significantly to UK biodiversity at a landscape level, and that several thousand new ponds are created each year in the UK alone, the findings suggest that well designed and located pond complexes could be used to significantly enhance freshwater biodiversity within catchments.
in Hydrobiologia > n°597 (2008) . - pp 137-148[article]The ecology of European ponds: defining the characteristics of a neglected freshwater habitat / CEREGHINO, R. (2008)
Titre : The ecology of European ponds: defining the characteristics of a neglected freshwater habitat Type de document : texte imprimé Auteurs : R. CEREGHINO ; J. BIGGS ; B. OERTLI ; S. DECLERCK Année de publication : 2008 Article en page(s) : pp 1-6 Catégories : Ecoplanète
biodiversity ; conservation ; Conservation network ; Ecosystem services ; Water policy
Résumé : There is growing awareness in Europe of the importance of ponds, and increasing understanding of the contribution they make to aquatic biodiversity and catchment functions. Collectively, they support considerably more species, and specifically more scarce species, than other freshwater waterbody types. Ponds create links (or stepping stones) between existing aquatic habitats, but also provide ecosystem services such as nutrient interception, hydrological regulation, etc. In addition, ponds are powerful model systems for studies in ecology,evolutionary biology and conservation biology, and can be used as sentinel systems in the monitoring of global change. Ponds have begun to receive greater protection, particularly in the Mediterranean regions of Europe, as a result of the identification of Mediterranean temporary ponds as a priority in the EU Habitats Directive. Despite this, they remain excluded from the provisions of the Water Framework Directive, even though this is intended to ensure the good status of all waters. There is now a need to strengthen, develop and coordinate existing initiatives, and to build a common framework in order to establish a sound scientific and practical basis for pond conservation in Europe. The articles presented in this issue are intended to explore scientific problems to be solved in order to increase the understanding and the protection of ponds, to highlight those aspects of pond ecology that are relevant to freshwater science, and to bring out research areas which are likely to prove fruitful for further investigation.
in Hydrobiologia > n°597 (2008) . - pp 1-6[article]15 years of pond assessment in Britain : results and lessons learned from the work of Pond Conservation. / BIGGS, J. (2005)
Titre : 15 years of pond assessment in Britain : results and lessons learned from the work of Pond Conservation. Type de document : texte imprimé Auteurs : J. BIGGS ; P. WILLIAMS ; M. WHITFIELD ; P. NICOLET ; A. WEATHERBY Année de publication : 2005 Article en page(s) : pp 693-714
in Aquatic Conservation : Marine and Freshwater Ecosystems > n°6 - vol.15 (2005) . - pp 693-714[article]Spatial patterns in pond invertebrate communities : separating environmental and distance effects. / BRIERS, R. (2005)
Titre : Spatial patterns in pond invertebrate communities : separating environmental and distance effects. Type de document : texte imprimé Auteurs : R. BRIERS ; J. BIGGS Année de publication : 2005 Article en page(s) : pp 549-557
in Aquatic Conservation : Marine and Freshwater Ecosystems > n°6 - vol.15 (2005) . - pp 549-557[article]vol.15 - n°6 - 2005 (Bulletin de Aquatic Conservation : Marine and Freshwater Ecosystems, vol.15 - n°6 [01/01/2005]) : Marine and Freshwater Ecosystems / BIGGS, J. (2005)PermalinkComparative biodiversity of rivers, streams, diteches and ponds in an agricultural landscape in Southern England. / WILLIAMS, P.-J. (2004)PermalinkTemporary ponds of eastern Poland : an initial assessment of their importance for nature conservation. / BIGGS, J. (2004)PermalinkIdentifying optimum locations for new ponds. / DAVIES, B.-R. (2003)PermalinkA guide to monitoring the ecological quality of ponds and canals using PSYM. / BIGGS, J. (2002)PermalinkA new biological method for assessing the ecological quality of lentic waterbodies. / BIGGS, J. (2001)PermalinkAncient ponds and modern landscapes. / WILLIAMS, P.-J. (2000)PermalinkBiological techniques of still water quality assessment. Phase 3 : method development. / BIGGS, J. (2000)PermalinkDesign and construction of new ponds : principles and practices. / WILLIAMS, P.-J. (2000)PermalinkFactors affecting the nature conservation value of ponds : results of the National Ponds Survey. / BIGGS, J. (2000)Permalink