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  • 1
    Electronic Resource
    Electronic Resource
    Species traits in relation to habitat variability and state: neotropical juvenile fish in floodplain creeks (2001)
    Oxford UK : Blackwell Science Ltd
    Freshwater biology 46 (2001), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 1. Ecological theory predicts that (1) proportions of fish having particular life history strategies should vary with habitat conditions, and (2) biological traits of species should change across spatio-temporal variability gradients (River Habitat Templet).2. We used data on juvenile fish and biological traits of the species, temporal (i.e. hydrology) and spatial (e.g. depth, bottom substrate, litter type) habitat variability and state (i.e. mean conditions) to test these predictions for communities comprising 57 fish taxa in floodplain creeks of the Sinnamary River (French Guiana).3. We did not confirm predictions on habitat use according to groupings based on life history strategies. However, we found 10 significant relationships between species traits and habitat variability (e.g. size at maturity, diameter of mature oocytes, parental care and relative body height decreased with increasing temporal variability; size at maturity and mean diameter of mature oocytes increased with increasing spatial variability). In addition, state variables such as mean water level, dissolved oxygen, mean width or mean depth could explain much of the variation in species traits.4. Thus, our results generally supported the River Habitat Templet but suggested that state, in addition to variability, should be included in habitat descriptions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2427.2001.00744.x
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  • 2
    Electronic Resource
    Electronic Resource
    Predicting diversity of juvenile neotropical fish communities: patch dynamics versus habitat state in floodplain creeks (1999)
    Springer
    Oecologia 118 (1999), S. 503-516 
    Details
    ISSN: 1432-1939
    Keywords: Key words Species richness ; Habitat diversity ; Hydrological variability ; Young fish
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The species richness of communities should largely depend on habitat variability and/or on habitat state. We evaluated the ability of habitat variability and habitat state to predict the diversity of juvenile neotropical fish communities in creeks of a river floodplain. The young-fish fauna consisted of 73 taxa, and samples were well distributed over a wide range of relevant temporal and spatial habitat variability. We were unable to demonstrate clear patterns of richness in relation to temporal and spatial habitat variability (if habitat state variables were not included), regardless of the temporal variability scale, the grouping of sites (up- and downstream sites differed in temporal variability patterns), taxonomic units or life stages considered. Using stepwise multiple regression, 36% of the variance in species richness was explained for all data, and at best 47% was explained for all taxonomic units at upstream sites using temporal and spatial habitat variability and habitat state (bank length, mean width, mean water level before fishing and/or water turbidity). Using Monte Carlo simulations, we blindly predicted 31% (all data) and at best 37% (all upstream taxa) of the observed variance in species richness from these model types. This limited precision is probably because rare species produced most of the richness patterns in our creeks. The prediction of these rare species is generally difficult for various reasons, and may be a problem in many ecosystem types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004420050753
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  • 3
    Electronic Resource
    Electronic Resource
    Fish richness and species-habitat relationships in two coastal streams of French Guiana, South America (1998)
    Springer
    Environmental biology of fishes 51 (1998), S. 25-39 
    Details
    ISSN: 1573-5133
    Keywords: neotropics ; fish assemblages ; environmental factors ; total and within habitat species richness ; fish-habitat associations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We examined the factors controlling fish species richness and taxa-habitat relationships in the Malmanoury and Karouabo coastal streams in French Guiana between the short and long rainy seasons. The aims were to evaluate the environmental factors that describe species richness on different scales and to define the ecological requirements of fish taxa in the two streams at that period of the year. We sampled ten regularly spaced freshwater sites in each stream with rotenone. We caught a total of 7725 individuals representing 52 taxa from 21 families and 6 orders. More taxa were caught in the Malmanoury (n=46) than in the Karouabo stream (n=37). These values augmented by the number of fish taxa caught only by gill nets in a parallel survey fitted very well to a log-log model of fish richness versus catchment area in Guianese rivers. Most of the fish taxa encountered in the Malmanoury and Karouabo streams were of freshwater origin and nearly all the fish species caught in these two small coastal streams were also found in the nearby Sinnamary River with the exceptions of the cichlid Heros severus and the characid Crenuchus spirulus. Moreover, no significant relationship was found between a size-independent estimate of fish richness and distance from the Ocean. Thus, despite their coastal position, the Malmanoury and Karouabo streams contained fish assemblages with strong continental affinities. At a local scale, independently of site size, those with relatively more habitat types harbored a relatively greater number of fish taxa. Canopy cover, water conductivity and bank length were the most important environmental variables for fish assemblage composition at that period of the year. Oxygen and vegetation participated also in defining fish habitat requirements but to a lesser extent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007422100976
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  • 4
    Electronic Resource
    Electronic Resource
    Fish richness and species-habitat relationships in two coastal streams of French Guiana, South America (1998)
    Springer
    Environmental biology of fishes 51 (1998), S. 25-39 
    Details
    ISSN: 1573-5133
    Keywords: neotropics ; fish assemblages ; environmental factors ; total and within habitat species richness ; fish-habitat associations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We examined the factors controlling fish species richness and taxa-habitat relationships in the Malmanoury and Karouabo coastal streams in French Guiana between the short and long rainy seasons. The aims were to evaluate the environmental factors that describe species richness on different scales and to define the ecological requirements of fish taxa in the two streams at that period of the year. We sampled ten regularly spaced freshwater sites in each stream with rotenone. We caught a total of 7725 individuals representing 52 taxa from 21 families and 6 orders. More taxa were caught in the Malmanoury (n=46) than in the Karouabo stream (n=37). These values augmented by the number of fish taxa caught only by gill nets in a parallel survey fitted very well to a log-log model of fish richness versus catchment area in Guianese rivers. Most of the fish taxa encountered in the Malmanoury and Karouabo streams were of freshwater origin and nearly all the fish species caught in these two small coastal streams were also found in the nearby Sinnamary River with the exceptions of the cichlid Heros severus and the characid Crenuchus spirulus. Moreover, no significant relationship was found between a size-independent estimate of fish richness and distance from the Ocean. Thus, despite their coastal position, the Malmanoury and Karouabo streams contained fish assemblages with strong continental affinities. At a local scale, independently of site size, those with relatively more habitat types harbored a relatively greater number of fish taxa. Canopy cover, water conductivity and bank length were the most important environmental variables for fish assemblage composition at that period of the year. Oxygen and vegetation participated also in defining fish habitat requirements but to a lesser extent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007422100976
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  • 5
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    Potential impact of invasive amphipods on leaf litter recycling in aquatic ecosystems (2011)
    Springer
    Details
    Publication Date: 2011-02-19
    Print ISSN: 1387-3547
    Electronic ISSN: 1573-1464
    Topics: Biology
    Published by Springer
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  • 6
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    Predicting diversity of juvenile neotropical fish communities: patch dynamics versus habitat state in floodplain creeks (1999)
    Springer
    Details
    Publication Date: 1999-01-01
    Print ISSN: 0029-8549
    Electronic ISSN: 1432-1939
    Topics: Biology
    Published by Springer
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