Archiv Fur Hydrobiologie最新文献

{"title":"Avoidance behaviour in the gallery construction of Tinodes unicolor (Psychomyiidae, Trichoptera) to prevent intraspecific encounters","authors":"Christian Alecke, Bernd Spänhoff, E. Meyer","doi":"10.1127/0003-9136/2005/0164-0335","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0335","url":null,"abstract":"Larvae of the psychomyiid caddisfly Tinodes unicolor construct tunnel-like, fixed retreatments (galleries) on stone surfaces in small streams. Larvae were reared during a laboratory study in a streamwater-filled aquarium under controlled light and temperature conditions. The gallery construction behaviour of larvae was investigated at 8 dates within 6 months by plotting each gallery on the front pane of the aquarium on a transparent foil. Gallery length and the distances to the neighbouring galleries were measured and the number of curves in each gallery counted. On each surveying date this procedure was repeated one week later to investigate the short-term gallery construction behaviour of larvae. Gallery lengths remained relatively constant through- out the 6 month study period. The analysis of the short-term surveys displayed that the distance to the next gallery of a conspecific decreased with increasing length of the galleries. With decreasing distance to the neighbouring gallery the construction activ- ity of larvae and the number of curves in the converging gallery increased. We inter- preted this observation as an avoidance behaviour of larvae to prevent intraspecific en- counters which could result in aggressive conflicts between two larvae.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"705 1","pages":"335-343"},"PeriodicalIF":0.0,"publicationDate":"2005-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74761658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does hydrology constrain the structure of fish assemblages in French streams? Regional scale analysis","authors":"F. Cattanéo","doi":"10.1127/0003-9136/2005/0164-0345","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0345","url":null,"abstract":"With the increasing alteration of flow regimes worldwide, it has become a key challenge to estimate the general linkages between species and flow patterns. In fish, the young-of-the-year (YOY) cohort size is of fundamental importance to population dynamics, and can provide valuable insights into part of the ecological functioning of river systems. Here, using 65 French sites, each with at least 4 annual samples, I investigated the influence of the seasonal inter-annual flow variability on the YOY fish assemblage within sites. Assemblage structure was described by relative abundances of species, diversity measurements (richness and Shannon's index) and species traits. Flow statistics were derived so as to reflect average conditions, low and high flow conditions, floods and overall variability, and were computed for each biological season (reproduction, growth and overwinter periods). Relationships were explored and tested by within-site co-inertia analysis, and quantified by ANCOVA models. The flow levels during the reproduction and growth periods consistently explained differences among years in 4 species guilds, although average relationships were weak (i.e. max. ∼9%). Assemblage diversity slightly declined with increasing water level during the growth period. Species responses depended on their biological and functional abilities to ensure their reproductive success under adverse hydrological conditions (e. g. time of spawning, fecundity, protection of offspring), and clearly reflected two contrasting reproductive strategies. These results are in general agreement with 'habitat template'-based theories. They suggest that flow may be locally managed to sustain or restore taxonomic or functional assemblage features, keeping in mind that the strength of the expected effect is site-specific.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"10 1","pages":"345-365"},"PeriodicalIF":0.0,"publicationDate":"2005-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81033856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The strength of limiting factors for duckweed during algal competition","authors":"S. Szabó, R. Roijackers, M. Scheffer, G. Borics","doi":"10.1127/0003-9136/2005/0164-0127","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0127","url":null,"abstract":"Duckweed (Lemna gibba) growth was found to be strongly reduced by unicellular green algae (Scenedesmus conspicua, Chlorella sp., Chlamydomonas sp.) in indoor experiments. These algae reduced N, P, Fe and Mn concentrations of the medium drastically, moreover they increased the pH beyond 10. Subsequent additions of nutrients and pH neutralisation removed the growth inhibition of duckweed. This growth inhibition is, therefore, concluded to be due to pH increase and N, P and trace element (Fe, Mn) removal. Of the five factors significantly inhibiting duckweed growth, depletion of N was strongest, increase in pH was second, followed by reduction of P > Fe > Mn.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"27 1","pages":"127-140"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77169098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lack of a unimodal relationship between fish growth and macrophyte cover in 45 north temperate lakes","authors":"K. Cheruvelil, Nancy A. Nate, P. Soranno, M. T. Bremigan","doi":"10.1127/0003-9136/2005/0164-0193","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0193","url":null,"abstract":"Macrophytes have several important roles for fish populations in lakes. Theory and experimental evidence support the hypothesis of an optimal intermediate macrophyte cover for fish foraging and growth. However, few multi-lake studies of this relationship have been conducted at the whole-lake scale in north temperate lakes, and results to date have not been consistent. We examined the relationship between macrophyte cover and fish growth for two fish species that are tightly linked to macrophytes, largemouth bass (Micropterus salmoides) and bluegill (Lepomis macrochirus). We conducted our study on 45 thermally stratified north-temperate lakes using nine macrophyte cover metrics at both the whole-lake and littoral-zone scales. We found little evidence to support the hypothesis of an optimal intermediate range of any macrophyte cover metric for fish growth. However, growth for some ages of both species was negatively related to some of the macrophyte metrics at each spatial scale. These results should help direct more holistic management of lakes by informing the management of both macrophytes and fish, and serve as a caution to ecologists and managers attempting to extrapolate theoretical and experimental results to the whole-lake scale.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"6 1","pages":"193-215"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89825578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards a standardized characterization of the potentially migrating silver European eel (Anguilla anguilla, L.)","authors":"A. Acou, P. Boury, P. Laffaille, A. Crivelli, E. Feunteun","doi":"10.1127/0003-9136/2005/0164-0237","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0237","url":null,"abstract":"We defined a standardized method for discriminating candidate silver eels that may undergo catadromous migration in the following season from the sedentary fraction of a population. A combination of two qualitative criteria (state of differentiation of the lateral line and colour contrast) and one quantitative criterion (Ocular Index OI) was used to determine the development toward silvering. In the non-migratory phase, we found a gradient of the three criteria between yellow (0 criterion), presilver (1 to 2 criteria) and silver (3 criteria) eels. In the migrant phase, silver eels had ended their metamorphosis process and were characterized at the same time by the presence of the 3 silvering criteria. A mark-recapture survey using PIT-tags provided evidence that only identified silver eels (3 silvering criteria present) in the catchment actually emigrated the following season. Moreover, the use of a single criterion of silvering among the three generated large variation in the estimated proportion of candidates for emigration which varied between -22% and +63 %. Such a result confirmed that a multicriteria approach is needed to characterize in a standard way the potentially migrating silver eel.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"19 1","pages":"237-255"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90923464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vertical heterogeneity in zooplankton community structure: a variance partitioning approach","authors":"S. Thackeray, D. G. George, Roger I. Jones, I. Winfield","doi":"10.1127/0003-9136/2005/0164-0257","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0257","url":null,"abstract":"The vertical structure of a freshwater zooplankton community was analysed quantitatively, in order to test the hypotheses that 1) vertical multivariate variability in community composition coincided with vertical variations in water temperature and that 2) the fundamental nature of the spatial structure in community composition would differ in mixed and stratified conditions. Multivariate methods were used to partition the variability in a spatio-temporal species dataset (12 sampling depths, 19 dates, 6 species) into pure spatial, temporal, environmental and shared components. Using this approach, 51 % of the variation of the zooplankton community could be explained. Broad-scale spatial organization in the zooplankton community (i.e. water column scale variation that could be explained as a simple first-order function of depth) accounted for 23 % of the explained variation. Approximately half of this variation was shared with depth-wise variations in water temperature variables. Due to the discontinuity of the thermally stratified water column, there existed a component of the shared variation between water temperature variables and zooplankton community structure that could not be explained by a simple first-order function of depth. By statistically modelling the discontinuous nature of the thermally stratified water column for a series of discrete time periods, thermocline position was found to explain between 9 and 22 % of the total variation in community structure. This indicated that spatial variations in the community composition included a discontinuous component, that coincided with the thermocline.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"39 1","pages":"257-275"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77983856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vegetation diversity increases species richness of leaf-decaying fungal communities in woodland streams","authors":"B. Laitung, É. Chauvet","doi":"10.1127/0003-9136/2005/0164-0217","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0217","url":null,"abstract":"Submerged leaf litter is a vital resource for many aquatic species in wood- land streams. However, forestry tends to lower the diversity of litter entering streams, which potentially impacts leaf-dependent species and the entire detritus-based food web. To overcome this problem, a guideline for sustainable forestry and ecosystem conservation lies in increasing litter diversity in managed forests. However, the way in and the extent to which such an increase changes the leaf decomposer communities are mostly unknown. In the present study, fungal communities were surveyed bimonthly in ten woodland headwater streams with contrasting tree diversity resulting in various proportions of leaf species in litter. A total of 79 aquatic hyphomycete species identi- fied from conidia in stream water were listed. The differences in conidial abundance, richness and diversity between communities from the ten streams suggested a strong effect of local abundance and composition of leaf litter. Conidial abundance clearly distinguished two sets of streams, one dominated by oaks and hazel and the other by beech. The fungal richness in the ten streams showed a positive and significant corre- lation with the leaf species richness, accounting for 44 % of the total variance among streams. About 50 % more fungal species were found in streams with the highest leaf litter diversity, and several species were more frequent in such streams. No distinct species assemblages were however associated with any particular leaf species. These findings were interpreted as resulting from substrate preferences, but not specificity by the fungal species. This is supported by a manipulation in which the addition of a bulk of hazel leaves in a stream dominated by beech did not result in an increase in fungal richness over three months. Seasonal changes appeared to be the main factor controll- ing fungal species abundance. Overall, the results suggest a hierarchical pattern be- tween riparian and aquatic biodiversity and provide an argument for the conservation of diverse tree species along streams.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"36 1","pages":"217-235"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78763162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genetic population structure of a rare, temporary pond dwelling fairy shrimp Linderiella massaliensis (Crustacea: Anostraca)","authors":"E. Meglécz, A. Thiéry","doi":"10.1127/0003-9136/2005/0164-0277","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0277","url":null,"abstract":"Linderiella massaliensis THIERY & CHAMPEAU, 1988, is a temporary pond dwelling fairy shrimp. It is an endemic species of France, limited to only five populations. One of these populations is in decline and the habitat of another is strongly perturbed by human impact. The genetic structure of the populations based on 6 allozyme loci suggests that: (i) gene flow is sufficient to prevent the genetic isolation of the populations, but not enough to maintain one large panmictic population despite the short geographical distances between habitats; (ii) aquatic consumers, such as waterfowl, and underground karstic water flow, can be important for the passive dispersal of the species.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"15 1","pages":"277-286"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73432524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retention and early diagenetic transformation of phosphorus in Lake arendsee (Germany) : consequences for management strategies","authors":"M. Hupfer, J. Lewandowski","doi":"10.1127/0003-9136/2005/0164-0143","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0143","url":null,"abstract":"Repeated sediment core investigations over one decade, mass balance calculations, and vertical flux measurements by traps and dialysis samplers, were used to determine P retention rates, release potential, and early diagenetic transformation processes in the sediment of Lake Arendsee (Germany). Sediment cores were dated by varve counting, by 137 cesium, and by a distinct layer originating from a restoration attempt in 1995, which involved the capping of the sediment with calcium rich material from the lake shore. P retention rates and the internal P cycle have not been altered by the sediment capping. The sharp decline of total P content within the first two centimeters of the sediment shows that diagenetic P mobilization is a rapid process. The temporary P pool in the sediment, calculated from core analysis (mean ± SE: 709 ± 82mg m -2 , n = 7), was small compared to the rates of hypolimnetic SRP increase (10.7 ± 0.45 mg m -2 d -1 , 1992-1997) and total P losses in the epilimnion caused by sedimentation (11.7 ± 0.53 mg m -2 d -1 , 1992-1997), both of the latter calculated by mass balances during summer stratification. Without additional supply of freshly settled material, the temporary P pool in the sediment would be exhausted in less than three months. The fast P release of freshly settled material was also demonstrated during summer by the three times higher vertical P sedimentation rates calculated on the basis of mass balance data, compared to rates determined on the basis of cylindrical traps, in which some P was released during four weeks exposure time. The driving process for the rapid P release in Lake Arendsee is the remineralisation of organic P. This study demonstrates that high hypolimnetic P accumulation rates are not always correlated with a large total or potentially mobile P pool in the sediment. In lakes with small temporary P pools in the sediment, a decrease of P in the water body would immediately decrease the hypolimnetic P accumulation in summer; capping or dredging as in-lake measures are ineffective in such lakes.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"63 1","pages":"143-167"},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82346629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using sediments to assess the resistance of a calcareous lake to diffuse nutrient loading","authors":"W. Hobbs, K. Irvine, I. Donohue","doi":"10.1127/0003-9136/2005/0164-0109","DOIUrl":"https://doi.org/10.1127/0003-9136/2005/0164-0109","url":null,"abstract":"The capacity of lake sediments to retain phosphorus can provide an impor- tant buffer to eutrophication. Concentrations of total phosphorus (TP) in the surface sediment of a shallow calcareous lake (Lough Carra, Ireland) varied significantly across three basins and were correlated strongly with iron and manganese, but corre- lated inversely with calcium carbonate. The concentrations of phosphorus in the surfi- cial sediments of each basin were observed to reflect the mean annual TP of overlying waters, such that the North Basin > South Basin > Mid Basin. Phosphorus sorption experiments on the most TP-enriched sediments predicted a saturation concentration of 0.15 mg P g -1 . Geochemically similar sediments from the northern basin had slightly lower measured TP concentrations (0.10 mg P g -1 ), while those sediments with higher Fe concentrations had up to 0.54 mg P g -1 . Decreasing Fe:P in the upper sections of sediment cores taken from each lake basin show clearly a reduction in the ability of the lake sediments to bind P, reducing the resistance of the lake to eutrophication. The re- duced capacity of the sediments to adsorb P should be viewed as a warning signal that indicates increasing risk to water quality and current high conservation status of Lough Carra. The risk that the lake could \"flip\" to an alternative state, with high concentra- tions of phytoplankton and a loss of extensive charophyte beds, requires that measures are effected that will prevent or reduce nutrient loads to the lake. This will necessitate a reversal of the current trend of increasing catchment pressures from intensification of agriculture and increased rural housing.","PeriodicalId":8118,"journal":{"name":"Archiv Fur Hydrobiologie","volume":"50 1","pages":"109-125"},"PeriodicalIF":0.0,"publicationDate":"2005-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90127493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}