Spatial metrics and methods for riverscapes: quantifying variability in riverine fish habitat patterns

Defining the optimal configuration of all habitats required during a life cycle, called vital habitat, is a necessary step for effective management of riverine fishes and restoration of river habitats. Landscape ecology provides many metrics and methods to study the composition and configuration of habitats, but they need to be adapted for fishes in river environments or riverscapes. For example, hydrographic distance seems more appropriate than Euclidean distance for measuring distances between vital habitats in riverscapes. We adapted some metrics to assess habitats patterns of a threatened cyprinid species (Barbus barbus) for natural and artificial riverscapes of the Seine river, France. Composition metrics provided essential quantification of the relative abundance of the vital habitats, whereas configuration metrics were relevant to quantify their spatial arrangement and spatial relationships. Nearest-neighbor hydrographic distance was useful to evaluate the influence of flow variability in the natural riverscape, but was not relevant to discriminate the artificial riverscape from the natural one. Conversely, a proximity index revealed high fragmentation in the artificial riverscape. Spatial habitat relationships between feeding and resting habitats, evaluated with a moving window analysis, provided a map of daily activity patches and emphasized the gaps in the biological continuity of the riverscape. The spatial metrics and methods we adapted to the particularities of the Seine river allowed us to detect natural and artificial variability in fish habitat patterns. They should help in evaluating impacts of habitat alteration and isolation and prioritize preservation and restoration policies in human-impacted rivers. Copyright © 2008 John Wiley & Sons, Ltd.

[1]  J. Baudry,et al.  A Spatially Explicit Resource-Based Approach for Managing Stream Fishes in Riverscapes , 2006, Environmental management.

[2]  C. Torgersen,et al.  Influence of habitat heterogeneity on the distribution of larval Pacific lamprey (Lampetra tridentata) at two spatial scales , 2004 .

[3]  Erik Matthysen,et al.  The application of 'least-cost' modelling as a functional landscape model , 2003 .

[4]  W. Hubert,et al.  Comparison of Habitat Composition and Cutthroat Trout Abundance at Two Flows in Small Mountain Streams , 1996 .

[5]  Effects of residual flow and habitat fragmentation on distribution and movement of bullhead (Cottus gobio L.) in an alpine stream , 2000 .

[6]  Stephen L. Rathbun,et al.  Spatial modelling in irregularly shaped regions: Kriging estuaries , 1998 .

[7]  G. Niemi,et al.  Recovery of temperate-stream fish communities from disturbance: A review of case studies and synthesis of theory , 1992 .

[8]  K. Fausch,et al.  Why do Foraging Stream Salmonids Move During Summer? , 2002, Environmental Biology of Fishes.

[9]  D. Isaak,et al.  Chinook salmon use of spawning patches: relative roles of habitat quality, size, and connectivity. , 2007, Ecological applications : a publication of the Ecological Society of America.

[10]  Lisa M. Ganio,et al.  A geostatistical approach for describing spatial pattern in stream networks , 2005 .

[11]  E. Irwin,et al.  FLOW AND HABITAT EFFECTS ON JUVENILE FISH ABUNDANCE IN NATURAL AND ALTERED FLOW REGIMES , 2001 .

[12]  R. Hey,et al.  River rehabilitation and fish populations: assessing the benefit of instream structures , 2003 .

[13]  H. Pulliam,et al.  Ecological Processes That Affect Populations in Complex Landscapes , 1992 .

[14]  E. Baras.  Environmental determinants of residence area selection by Barbus barbus in the River Ourthe , 1997 .

[15]  Masha Sosonkina,et al.  Distributed Schur Complement Techniques for General Sparse Linear Systems , 1999, SIAM J. Sci. Comput..

[16]  J. Bissonette,et al.  The behavior of landscape metrics commonly used in the study of habitat fragmentation , 1998, Landscape Ecology.

[17]  G. Petts.  Historical analysis of fluvial hydrosystems , 1989 .

[18]  K. Morita,et al.  Effects of Habitat Fragmentation by Damming on the Persistence of Stream‐Dwelling Charr Populations , 2002 .

[19]  S. D. Cooper,et al.  Quantifying Spatial Heterogeneity in Streams , 1997, Journal of the North American Benthological Society.

[20]  K. Fausch,et al.  Landscapes to Riverscapes: Bridging the Gap between Research and Conservation of Stream Fishes , 2002 .

[21]  Amy J. Schrank,et al.  Movement patterns in inland cutthroat trout (Oncorhynchus clarki utah): management and conservation implications , 2004 .

[22]  A. Lemly,et al.  North American Journal of Fisheries Management Habitat Sequencing and the Importance of Discharge in Inferences , 2022 .

[23]  A. N. Strahler.  Quantitative analysis of watershed geomorphology , 1957 .

[24]  Darren J. Bender,et al.  Integrating Landscape Ecology into Natural Resource Management: Focal patch landscape studies for wildlife management: Optimizing sampling effort across scales , 2002 .

[25]  J. Ward.  RIVERINE LANDSCAPES: BIODIVERSITY PATTERNS, DISTURBANCE REGIMES, AND AQUATIC CONSERVATION , 1998 .

[26]  K. Tockner,et al.  Landscape ecology: a framework for integrating pattern and process in river corridors , 2002, Landscape Ecology.

[27]  J. Belliard,et al.  Fish communities and river alteration in the Seine Basin and nearby coastal streams , 1999, Hydrobiologia.

[28]  Curtis H. Flather,et al.  Patchy Reaction‐Diffusion and Population Abundance: The Relative Importance of Habitat Amount and Arrangement , 2002, The American Naturalist.

[29]  M. Scheffer,et al.  Estimating habitat isolation in landscape planning , 1992 .

[30]  M. Christman,et al.  Landscape‐based geostatistics: a case study of the distribution of blue crab in Chesapeake Bay , 2006 .

[31]  D. W. Rondorf,et al.  Quantifying Flow-Dependent Changes in Subyearling Fall Chinook Salmon Rearing Habitat Using Two-Dimensional Spatially Explicit Modeling , 2002 .

[32]  J. Brasington,et al.  Geomorphic dynamics of floodplains: ecological implications and a potential modelling strategy , 2002 .

[33]  Don Edwards,et al.  Kriging in estuaries: as the crow flies, or as the fish swims? , 1997 .

[34]  Lenore Fahrig,et al.  When does fragmentation of breeding habitat affect population survival , 1998 .

[35]  J. Rosenfeld,et al.  Information needs for assessing critical habitat of freshwater fish , 2006 .

[36]  P. Jurajda.  Effect of channelization and regulation on fish recruitment in a flood plain river , 1995 .

[37]  F. Schiemer,et al.  ENDANGERED FISH SPECIES OF THE DANUBE RIVER IN AUSTRIA , 1989 .

[38]  L. Fahrig,et al.  On the usage and measurement of landscape connectivity , 2000 .

[39]  Multiple human impacts by the City of Paris on fish communities in the Seine river basin, France , 1999 .

[40]  George R. Parker,et al.  Using an index of habitat patch proximity for landscape design , 1994 .

[41]  Atte Moilanen,et al.  On the use of connectivity measures in spatial ecology , 2001 .

[42]  Jacques Baudry,et al.  Analyse descriptive multi-échelle de la structure d'un paysage Application à la mosaïque d'occupation du sol d'un territoire agricole dans le bocage breton , 2002, Rev. Int. Géomatique.

[43]  G. Bornette,et al.  Connectivity and biocomplexity in waterbodies of riverine floodplains , 2002 .

[44]  D. Lonzarich,et al.  Effects of habitat isolation on the recovery of fish assemblages in experimentally defaunated stream pools in Arkansas , 1998 .

[45]  L. Fahrig,et al.  Conservation of fragmented populations , 1994 .

[46]  C. Nilsson,et al.  Fragmentation and Flow Regulation of River Systems in the Northern Third of the World , 1994, Science.

[47]  Jean-Claude Philippart,et al.  The impact of small physical obstacles on upstream movements of six species of fish , 2002, Hydrobiologia.

[48]  Darren J. Bender,et al.  Using patch isolation metrics to predict animal movement in binary landscapes , 2004, Landscape Ecology.

[49]  W. Junk.  The flood pulse concept in river-floodplain systems , 1989 .

[50]  D. Lonzarich,et al.  Effects of riffle length on the short-term movement of fishes among stream pools , 2000 .