Mention de date : 2008
Hydrobiologia . n°597
Paru le : 01/01/2008
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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]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]A comparative analysis of cladoceran communities from different water body types: patterns in community composition and diversity / Tom De Bie (2008)
Titre : A comparative analysis of cladoceran communities from different water body types: patterns in community composition and diversity Type de document : texte imprimé Auteurs : Tom De Bie ; Steven Declerck ; Koen Martens ; Luc De Meester ; Luc Brendonck Année de publication : 2008 Article en page(s) : pp 19-27 Catégories : Ecoplanète
biodiversity ; Cladoceran ; Ditch ; Pool ; Species richness ; Zooplankton
Résumé : To develop strategies for the management and protection of aquatic biodiversity in water bodies at the landscape scale, there is a need for information on the spatial organization of diversity in different types of aquatic habitats. In this study, we compared the cladoceran composition and diversity between wheel tracks, pools, ponds, lakes, ditches, and streams, in 18 different areas of Flanders (Belgium). Multivariate analysis revealed significant differences in the composition of cladoceran communities among the different water body types. Average local and total diversity tended to be highest for lakes and lowest for streams. Despite the relatively high number of species supported by lakes, small water bodies seem to contribute considerably more to the total cladoceran richness of an average landscape in Flanders than lakes, because of their high abundance. With respect to biodiversity conservation at the landscape scale, our results point to the importance of maintaining a diversity of water body types of different size, permanence and flow regimes.
in Hydrobiologia > n°597 (2008) . - pp 19-27[article]Macroinvertebrate assemblages in 25 high alpine ponds of the Swiss National Park (Cirque of Macun) and relation to environmental variables / Beat Oertli (2008)
Titre : Macroinvertebrate assemblages in 25 high alpine ponds of the Swiss National Park (Cirque of Macun) and relation to environmental variables Type de document : texte imprimé Auteurs : Beat Oertli ; Nicola Indermuehle ; Sandrine Angélibert ; Hélène Hinden ; Aurélien Stoll Année de publication : 2008 Article en page(s) : pp 29-41 Catégories : Ecoplanète
biodiversity ; biomonitoring ; Swiss Alps ; Zoobenthos
Résumé : High-altitude freshwater ecosystems and their biocoenosis are ideal sentinel systems to detect global change. In particular, pond communities are likely to be highly responsive to climate warming. For this reason, the Swiss National Park has included ponds as part of a long-term monitoring programme of the high-alpine Macun cirque. This cirque covers 3.6 km2, has a mean altitude of 2,660 m a.s.l., and includes a hydrographic system composed of a stream network and more than 35 temporary and permanent ponds. The first two steps in the programme were to (i) make an inventory of the macroinvertebrates of the waterbodies in the Macun cirque, and (ii) relate the assemblages to local or regional environmental variables. Sampling was conducted in 25 ponds between 2002 and 2004. The number of taxa characterising the region (Macun cirque) was low, represented by 47 lentic taxa. None of them was endemic to the Alps, although several species were cold stenothermal. Average pond richness was low (11.3 taxa). Assemblages were dominated by Chironomidae (Diptera), and Coleoptera and Oligochaeta were also relatively well represented. Other groups, which are frequent in lowland ponds, had particularly poor species richness (Trichoptera, Heteroptera) or were absent (Gastropoda, Odonata, Ephemeroptera). Macroinvertebrate assemblages (composition, richness) were only weakly influenced by local environmental variables. The main structuring processes were those operating at regional level and, namely, the connectivity between ponds, i.e. the presence of a physical connection (tributary) and/or small geographical distance between ponds. The results suggest that during the long-term monitoring of the Macun ponds (started in 2005), two kinds of change will affect macroinvertebrate assemblages. The first change is related to the natural dynamics, with high local-scale turnover, involving the metapopulations characterising the Macun cirque. The second change is related to global warming, leading to higher local and regional richness through an increase in the number of colonisation events resulting from the upward shift of geographical ranges of species. At the same time the cold stenothermal species from Macun will be subject to extinction.
in Hydrobiologia > n°597 (2008) . - pp 29-41[article]Biodiversity and distribution patterns of freshwater invertebrates in farm ponds of a south-western French agricultural landscape / CEREGHINO, R. (2008)
Titre : Biodiversity and distribution patterns of freshwater invertebrates in farm ponds of a south-western French agricultural landscape Type de document : texte imprimé Auteurs : R. CEREGHINO ; A. RUGGIERO ; P. MARTY ; S. ANGELIBERT Année de publication : 2008 Article en page(s) : pp 43-51 Catégories : Ecoplanète
AGRICULTURE ; Artificial ponds ; macroinvertebrates ; SOM ; Wetlands
Résumé : We assessed the importance for biodiversity of man-made farm ponds in an agricultural landscape in SW France lacking natural wetlands. The ponds were originally created to provide a variety of societal services (irrigation, visual amenity, water for cattle, etc.). We also assessed the environmental factors influencing invertebrate assemblages in these ponds. Only 18 invertebrate taxa out of 114 taxa occurring in the study area were common to ponds and rivers indicating that the contribution of farm ponds to freshwater biodiversity was potentially high. A Self-Organizing Map (SOM, neural network) was used to classify 36 farm ponds in terms of the 52 invertebrate families and genera they supported, and to specify the influence of environmental variables related to land-use and to pond characteristics on the assemblage patterns. The SOM trained with taxa occurrences showed five clusters of ponds, most taxa occurring only in 1-2 clusters of ponds. Abandoned ponds tended to support higher numbers of taxa, probably because they were allowed to undergo a natural succession. Nevertheless, abandoned ponds were also amongst the largest, so that it remained difficult to separate the effects of pond size and abandonment, although both factors were likely to interact to favour higher taxon richness. The invertebrate communities in the ponds appeared to be influenced mainly by widely acting environmental factors (e.g. area, regionalization of assemblages) with little evidence that pond use (e.g. cattle watering, amenity) generally influenced assemblage composition. Our results support the idea that agricultural landscapes containing man-made ponds make a significant contribution to freshwater biodiversity indicating that protection of farm ponds from threats such as in-filling and pollution can make a positive contribution to the maintenance of aquatic biodiversity. This added value for biodiversity should be considered when calculating the economic costs and benefits of constructing water bodies for human activities.
in Hydrobiologia > n°597 (2008) . - pp 43-51[article]Patterns of composition and species richness of crustaceans and aquatic insects along environmental gradients in Mediterranean water bodies / BOIX, D. (2008)
Titre : Patterns of composition and species richness of crustaceans and aquatic insects along environmental gradients in Mediterranean water bodies Type de document : texte imprimé Auteurs : D. BOIX ; S. GASCON ; J. SALA ; A. Badosa ; S. Brucet ; R. Lopez-Flores ; M. MARTINOY ; J. GIFRE ; X. D. Quintana Année de publication : 2008 Article en page(s) : pp 53-69 Catégories : Ecoplanète
landscape ; Mediterranean ; pond ; richness ; trophic state
Résumé : Differences in the dynamics of ecological processes between Mediterranean and colder temperate aquatic systems could imply different patterns in faunal communities in terms of composition and biodiversity (i.e. species richness and rarity). In order to identify some of these patterns the crustacean and aquatic insect composition and biodiversity of four water body types, classified according to their salinity and water permanence, were compared. Moreover, the relationships between species richness and water, pond and landscape variables were analysed. A total number of 91 water bodies located throughout Catalunya (NE Iberian Peninsula) were sampled. Three species assemblages were observed: one for permanent freshwaters, another for temporary freshwaters, and a third one for saline waters (SW), since permanent and temporary saline water bodies had similar composition. Differences in salinity were associated with proportion of crustaceans versus insects and with singularity. Thus, saline ponds had a higher proportion of crustaceans, and lower values of singularity. Conductivity was significantly related to total (crustaceans plus insects) richness, and also related to insect richness. The main difference between the models obtained for crustacean species richness and insect species richness is the significance of landscape variables in the latter, and this fact could be related to the different dispersion types of these two faunal groups: active for insects versus passive for crustaceans.
in Hydrobiologia > n°597 (2008) . - pp 53-69[article]Relation between macroinvertebrate life strategies and habitat traits in Mediterranean salt marsh ponds (Empordà wetlands, NE Iberian Peninsula) / Stéphanie Gascon (2008)
Titre : Relation between macroinvertebrate life strategies and habitat traits in Mediterranean salt marsh ponds (Empordà wetlands, NE Iberian Peninsula) Type de document : texte imprimé Auteurs : Stéphanie Gascon ; Dani Boix ; Jordi Sala ; D. Xavier Quintana Année de publication : 2008 Article en page(s) : pp 71-83 Catégories : Ecoplanète
Functional group ; Habitat type ; Hydroperiod ; Temporal variability
Résumé : The influence of water permanence and high intra- and inter-annual hydrological variability on macrobenthos (organisms[1 mm) was studied using a taxonomical and a functional approach. The study was carried out in a Mediterranean salt marsh. Monthly samples of macrobenthic fauna were collected during two consecutive hydroperiods from six ponds with different water permanence (temporary, semi-permanent and permanent waters). Organisms were assigned to five functional response groups based on life-strategies according to their capacity to survive desiccation events, their dispersion capability and the necessity of water for their reproduction. Results from both approaches showed that the benthic community was more related to pond type than to intra- and inter-annual variability. The second aim was to analyse to which extent patterns in functional groups were determined by the existence of succession patterns or to environmental variability. In this sense, a clear succession pattern was not observed. In contrast, in most of the functional groups (4 out of 5), species within each functional group showed similar responses to water fluctuations. However, species of the fifth functional group, which comprised species without any particular adaptation to desiccation survival or avoidance, showed different responses to water level fluctuations.
in Hydrobiologia > n°597 (2008) . - pp 71-83[article]Macrophyte diversity and physico-chemical characteristics of Tyrrhenian coast ponds in central Italy: implications for conservation / Valentina Della Bella (2008)
Titre : Macrophyte diversity and physico-chemical characteristics of Tyrrhenian coast ponds in central Italy: implications for conservation Type de document : texte imprimé Auteurs : Valentina Della Bella ; Marcello Bazzanti ; Maria Giuseppina Dowgiallo ; Mauro Iberite Année de publication : 2008 Article en page(s) : pp 85-95 Catégories : Ecoplanète
Hydroperiod ; Mediterranean ; richness
Résumé : Awareness of pond conservation value is growing all over Europe. Ponds are recognized as important ecosystems supporting large numbers of species and several rare and threatened aquatic plants, macroinvertebrates and amphibians. Notwithstanding ponds, particularly temporary ones, are still neglected in Italy. There are some gaps in our understanding of the macrophyte ecology and the conservation value of Mediterranean small still waters. Therefore, this study investigated the macrophyte communities and physico-chemical characteristics of 8 permanent and 13 temporary ponds along the Tyrrhenian coast near Rome, with the aim to relate the distribution of aquatic plants to environmental variables, and to define the botanical conservation value of ponds. Throughout the study period (Spring 2002), Principal Component Analysis performed on abiotic variables clearly discriminated temporary ponds, smaller and more eutrophic, from permanent ponds, larger and with higher pH and oxygen concentration. A total of 73 macrophyte taxa were collected in the study ponds. Temporary waters hosted a smaller number of plant species than permanent ones. Besides hydroperiod length, the environmental factors related to plant richness were maximum depth, surface area, dissolved oxygen and nitrogen concentration in the water. Moreover, the Non-metric Multidimensional Scaling showed a high dissimilarity in the taxonomic composition of aquatic plants between temporary and permanent ponds. The former contained more annual fast-growing species (Callitriche sp. pl. and Ranunculus sp. pl.), while in the latter species with long life-cycles (i.e. Potamogeton sp. pl.) were more abundant. Our results highlighted that temporary and permanent ponds in central Italy have different macrophyte assemblages, with aquatic species (including some of conservation interest at regional scale) exclusively found in each pond type. This suggested that both type of ponds could give an irreplaceable contribution to the conservation of aquatic plant diversity of these freshwater ecosystems.
in Hydrobiologia > n°597 (2008) . - pp 85-95[article]Evaluation of sampling methods for macroinvertebrate biodiversity estimation in heavily vegetated ponds / Becerra Jurado, G. (2008)
Titre : Evaluation of sampling methods for macroinvertebrate biodiversity estimation in heavily vegetated ponds Type de document : texte imprimé Auteurs : G. Becerra Jurado ; M. Masterson ; R. Harrington ; M. Kelly-Quinn Année de publication : 2008 Article en page(s) : pp 97-107 Catégories : Ecoplanète
biodiversity ; macroinvertebrates ; Methodology ; Sampling
Résumé : This article presents an evaluation of two sampling methods for assessing the biodiversity of heavily vegetated wetlands. The aim was to establish an effective sampling regime to maximise total taxon richness and minimise sampling effort. Three Integrated Constructed Wetland (ICW) systems in Annetown Valley, Co. Waterford, SE of the Republic of Ireland, were sampled during spring and summer 2005. The two methods that were evaluated were pond netting and two types of horizontal activity traps, namely ''horizontal activity traps'' (HATs) and modified ''horizontal activity traps'' (modified HATs). The activity traps provided a one-way funnel system and were constructed from 2 l plastic bottles, allowing for the passive collection of taxa. HATs were designed to capture macroinvertebrates in open water and modified HATs, which were designed specifically for this study, were used to sample within stands of dense emergent vegetation. Results show that a combination of pond netting and activity traps will yield a more complete estimate of taxon richness. The performance of Modified HATs was not significantly different from that of the HATs in dense vegetation. Tests on the sampling effort required for each method are also discussed.
in Hydrobiologia > n°597 (2008) . - pp 97-107[article]Developing a multimetric index of ecological integrity based on macroinvertebrates of mountain ponds in central Italy / Angelo Solimini, G. (2008)
Titre : Developing a multimetric index of ecological integrity based on macroinvertebrates of mountain ponds in central Italy Type de document : texte imprimé Auteurs : G. Angelo Solimini ; Marcello Bazzanti ; Antonio RUGGERIO ; Gianmaria Carchini Année de publication : 2008 Article en page(s) : pp 109-123 Catégories : Ecoplanète
Appenins ; Bioassessment ; macroinvertebrates ; Mountain ponds
Résumé : The lack of biological systems for the assessment of ecological quality specific to mountain ponds prevents the effective management of these natural resources. In this article we develop an index based on macroinvertebrates sensitive to the gradient of nutrient enrichment. With this aim, we sampled 31 ponds along a gradient of trophy and with similar geomorphological characteristics and watershed use in protected areas of the central Apennines. A bioassessment protocol was adopted to collect and process benthic samples and key-associated physical, chemical, and biological variables during the summer growth season of 1998. We collected 61 genera of macroinvertebrates belonging to 31 families. We calculated 31 macroinvertebrate metrics based on selected and total taxa richness, richness of some key groups, abundance, functional groups and tolerance to organic pollution. The gradient of trophy was quantified with summer concentrations of chlorophyll a. We followed a stepwise procedure to evaluate the effectiveness of a given metric for use in the multimetric index. Those were the pollution tolerance metric ASPT, three metrics based on taxonomic richness (the richness of macroinvertebrate genera, the richness of chironomid taxa, and the percentage of total richness composed by Ephemeroptera, Odonata, and Trichoptera), two metrics based on FFG attributes (richness of collector gatherer taxa and richness of scraper taxa) and the habitbased metric richness of burrowers. The 95th percentile of each metric distribution among all ponds was trisected for metric scoring. The final Pond Macroinvertebrate Integrity Index ranged from 7 to 35 and had a good correlation (R2 = 0.71) with the original gradient of environmental degradation.
in Hydrobiologia > n°597 (2008) . - pp 109-123[article]Eutrophication: are mayflies (Ephemeroptera) good bioindicators for ponds? / MENETREY, N. (2008)
Titre : Eutrophication: are mayflies (Ephemeroptera) good bioindicators for ponds? Type de document : texte imprimé Auteurs : N. MENETREY ; B. OERTLI ; M. Sartori ; A. Wagner ; J. B. Lachavanne Année de publication : 2008 Article en page(s) : pp 125-135 Catégories : Ecoplanète
Ephémère ; Ephemeroptera ; Eutrophication ; EUTROPHISATION ; macroinvertebrates
Résumé : Ephemeroptera larvae are recognized worldwide for their sensitivity to oxygen depletion in running waters, and are therefore commonly used as bioindicators in many monitoring programmes. Mayflies inhabiting lentic waters, like lakes and ponds, in contrary have been poorly prospected in biomonitoring. For this purpose, a better understanding of their distribution in lentic habitats and of the relations of species presence with environmental conditions are needed. Within this framework, 104 ponds were sampled in Switzerland. The Ephemeroptera are found to be an insect order particularly well represented in the ponds studied here (93% of the lowland ponds). Nevertheless, in terms of diversity, they are relatively poorly represented (mean species number = 1.9). Two species dominated: Cloeon dipterum (Baetidae) and Caenis horaria (Caenidae). The investigations contributed to the updating of the geographical distribution of the species in Switzerland, as many of the observations appear to be from new localities. The trophic state of ponds appears here to be important for Ephemeroptera communities. First, there is a negative relationship between total phosphorus (TP) concentrations and species richness. Second, the presence of Caenis horaria or Cloeon dipterum is dependent on the trophic state. Caenis horaria is most closely associated with low levels of TP concentrations, while Cloeon dipterum appears to be less sensitive, and is most frequently found in hypertrophic conditions. A probable consequence of these relations, is that Baetidae are always present when Caenidae are also present. Contrastingly, Baetidae is observed as the only mayflies family present in several ponds.
in Hydrobiologia > n°597 (2008) . - pp 125-135[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]Management of an ornamental pond as a conservation site for a threatened native fish species, crucian carp Carassius carassius / Copp, G. H. (2008)
Titre : Management of an ornamental pond as a conservation site for a threatened native fish species, crucian carp Carassius carassius Type de document : texte imprimé Auteurs : G. H. Copp ; S. Warrington ; K. J. Wesley Année de publication : 2008 Article en page(s) : pp 149-155 Catégories : Ecoplanète
Goldfish ; Hybridization ; Poisson rouge ; Species diversity
Résumé : Ornamental ponds are important sites for conserving threatened native fish species (e.g. crucian carp Carassius carassius L.), but pond management plans rarely include considerations of native fishes. We developed and implemented a management plan for a small (0.8 h), ornamental estate pond in Hertfordshire (England) using historical information (aquatic plant and animal surveys) and a 9-year data set on climatic variables and crucian carp body condition. Crucian carp growth was not correlated with climatic variables, but body condition decreased with increasing temperature (in degree-days), which suggests that temperature influences on growth are counter-balanced by environmental factors. Management included the removal of one fish species (to eliminate hybridization with another species) and the introduction of two native species (to re-balance the fish assemblage), a reduction in floating aquatic plants (to reduce shading of the sediments) as well as the use of a chemical agent to compact the pond's fine sediments and barley straw to enhance invertebrate habitat and thus fish prey production.
in Hydrobiologia > n°597 (2008) . - pp 149-155[article]