The Network Dynamics Hypothesis: How Channel Networks Structure Riverine Habitats

Benda, Lee; Poff, N. LeRoy; Miller, Daniel J.; Dunne, Thomas; Reeves, Gordon H.; Pess, George R.; Pollock, Michael M.

doi:10.1641/0006-3568(2004)054[0413:tndhhc]2.0.co;2

Cited by 805 publications

(827 citation statements)

References 48 publications

Supporting

Mentioning

793

Contrasting

Unclassified

Order By: Relevance

“…Although dendritic networks within ecosystems are usually considered a special case of network topology (Grant et al 2007), they have attracted a great deal of attention in recent years. Such systems exhibit the distinctive feature that both the nodes and branches provide unique habitats (Benda et al 2004a;Benda et al 2004b;Grant et al 2007). …”

Section: Introductionmentioning

confidence: 99%

“…River confluences, which correspond to the nodes of dendritic river networks, are known to exhibit particular hydrodynamic traits (Rhoads & Kenworthy 1995;De Serres et al 1999;Benda et al 2004a;Benda et al 2004b;Rice et al 2008) that result in many geomorphically diverse habitats (Benda et al 2004b;Rice et al 2008). In river ecosystems, flooding-induced disturbances, which pro-*Address correspondence to this author at the Graduate School of Human Development and Environment, Kobe University, 3-11, Tsurukabuto, Nadaku, Kobe city, Hyogo pref,Japan;Tel: +81.78.803.7882;Fax:+81.78.803.7820; Handling Editor: Philip H. Crowley vide the most dynamic and complex biophysical habitats (Naiman et al 1993;Burkart 2001), occur more frequently at confluences (Benda et al 2004b). Thus, confluences are considered to increase spatial and temporal habitat heterogeneity (Benda et al 2004a;Benda et al 2004b;Rice et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…In river ecosystems, flooding-induced disturbances, which pro-*Address correspondence to this author at the Graduate School of Human Development and Environment, Kobe University, 3-11, Tsurukabuto, Nadaku, Kobe city, Hyogo pref,Japan;Tel: +81.78.803.7882;Fax:+81.78.803.7820; Handling Editor: Philip H. Crowley vide the most dynamic and complex biophysical habitats (Naiman et al 1993;Burkart 2001), occur more frequently at confluences (Benda et al 2004b). Thus, confluences are considered to increase spatial and temporal habitat heterogeneity (Benda et al 2004a;Benda et al 2004b;Rice et al 2008). Benda et al (2004a, b) reviewed several cases of habitat creation by confluences, e.g., the formation of fans and erosion-resistant deposits, which may influence biodiversity (Benda et al 2004a;Benda et al 2004b).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, confluences are considered to increase spatial and temporal habitat heterogeneity (Benda et al 2004a;Benda et al 2004b;Rice et al 2008). Benda et al (2004a, b) reviewed several cases of habitat creation by confluences, e.g., the formation of fans and erosion-resistant deposits, which may influence biodiversity (Benda et al 2004a;Benda et al 2004b). However, the roles of confluences in creating habitat heterogeneity (confluence effects) within river ecosystems have rarely been examined, but they should be investigated within a context of maintaining biodiversity in river ecosystems.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhanced Diversity at Network Nodes: River Confluences Increase Vegetation-Patch Diversity~!2010-03-22~!2010-04-30~!2010-07-07~!

Osawa¹,

Mitsuhashi²,

Niwa³

et al. 2010

TOECOLJ

View full text Add to dashboard Cite

Although dendritic networks within ecosystems have typically been considered a special case of network topology, they have attracted a great deal of attention in recent years. These systems exhibit unique features in that both the nodes and branches provide distinct habitats. Within a river discontinuum context, river confluences, which are nodes of dendritic river networks, are hypothesised to have particular hydrodynamic traits that create heterogeneous habitats through a unique disturbance regime, although this hypothesis has not yet been tested. We tested this hypothesis using a vegetation data set collected from 14 river basin systems in Hyogo Prefecture, Japan. We compared vegetation-patch diversity between confluence and single-flow areas using hierarchical Bayesian models. Our results demonstrated greater vegetation-patch diversity in confluence areas compared to single-flow areas. Our findings support the hypothesis that confluences result in highly heterogeneous habitats. To the best of our knowledge, this is the first empirical report to demonstrate that river confluences have high vegetation-patch diversity. We conclude that network nodes play an important role in maintaining the biodiversity of river networks.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Diversity at Network Nodes: River Confluences Increase Vegetation-Patch Diversity~!2010-03-22~!2010-04-30~!2010-07-07~!

Osawa¹,

Mitsuhashi²,

Niwa³

et al. 2010

TOECOLJ

View full text Add to dashboard Cite

show abstract

“…Considerando o mosaico de manchas de habitats na heterogeneidade espacial ao longo do rio, bem como a heterogeneidade temporal como resposta do sistema para o regime de perturbações (Benda et al, 2004), pode-se definir a vazão ecológica como sendo o volume de água, ao longo das mudanças espaço-temporais, necessário à preservação dos ecossistemas relacionados com o corpo hídrico.…”

Section: A Vazão Ecológicaunclassified

Untitled

2011

Ambi-Agua

View full text Add to dashboard Cite

Research sites to study the influence of drainage on soil and water chemistry, litter decomposition and soil respiration in central Amazonia. ISSN = 1980ISSN = -993X -doi:10.4136/1980 ABSTRACTThe launching of this first issue of the sixth volume contains 12 inedited peer reviewed papers from 53 authors that originated from three continents, four different countries, 20 universities from which 16 are from several Brazilian federal universities, 3 from abroad, 1 Brazilian state and one municipal university. Other nine authors are from research institutions, among them three from abroad. We proudly state that this fifteenth edition has been published on time as it was the case of all previous issues. Most articles of this issue concentrate on environmental characterization of different ecosystems pollution control and mitigation. Two articles assessed the water quality of small river basins. Then there are two articles, one about fire occurrence and precipitation relationship and one about irrigation control to optimize water usage. This editorial points out new accomplishments and changes on publication policies.Keywords: Ambi-Agua; environment; water resources; publication. O periódico científico "Ambiente & Água" após cinco anos de história RESUMOO lançamento da primeira edição do sexto volume contém 12 artigos inéditos revisados por pares publicados por 53 autores de três continentes e quatro países diferentes, de 20 universidades das quais 16 são universidades federais brasileiras, três do exterior, uma estadual e outra municipal. Nove outros autores são de instituições de pesquisa, entre elas, três do exterior. Temos orgulho em afirmar que esta décima quinta edição foi publicada no dia previsto, sem atraso, como foi o caso de todas as edições anteriores. A maioria dos artigos desta edição se concentra na caracterização ambiental, controle e mitigação de poluição de diferentes ecossistemas. Dois artigos avaliaram a qualidade da água de pequenas bacias hidrográficas. Ainda há dois artigos, sendo um sobre ocorrência de incêndio relacionado com precipitação e outro apresenta equipamento para o controle de irrigação, visando otimizar o uso da água. Este editorial destaca realizações e mudanças nas políticas de publicação.Palavras-chave: Ambi-Agua; recursos hídricos; publicação.Revista científica "Ambiente e Água" después de cinco años de historia RESUMEN El lanzamiento de esta primera edición del sexto volumen contiene 12 artículos inéditos revisados por pares publicados por 53 autores que se originó a partir de tres continentes y cuatro países distintos, 20 universidades de las cuales 16 son de varias universidades federales de Brasil, 3 del extranjero, una estadual de Brasil y una universidad municipal. Otros nueve autores son de instituciones de investigación, entre ellos tres extranjeros. Estamos orgullosos de afirmar que esta decimoquinta edición ha sido publicada a tiempo, sin retraso como se pasó BATISTA, G. T. "Ambiente & Água" scientific journal after five years of history. Ambi-Agua, Taubaté, v. 6, n...

show abstract

Ecosystem Processes

Covich

2005

Encyclopedia of Hydrological Sciences

View full text Add to dashboard Cite

Biological production in inland waters is limited by flows of energy and nutrients across landscapes that undergo complex spatial and temporal dynamics driven by hydrological processes. Primary production (by photosynthesis or chemosynthesis), nutrient uptake and cycling, and decomposition of organic matter are all interconnected by the movement of water and organisms among interconnected ecosystems. Hydrology influences rates of transport, deposition, and recycling of inorganic materials, which, in turn, influence the various species and their associated ecosystem processes. Ratios of nutrients limit productivity and influence foraging behavior of consumer species. The ratio of carbon to nitrogen to phosphorus (C: N :P) available to plants often limits rates of photosynthesis. In many inland aquatic ecosystems, the scarcity of phosphorus limits plant productivity, although nitrogen or light are often limiting factors in lakes and shaded streams. Suspended sediment transported by runoff carries adsorbed nutrients and influences light penetration that, in different combinations, can limit rates of photosynthesis. Dispersal of individuals to high‐quality habitats and assembly of natural communities sustain functional groups of species and ecosystem processes following disturbances (such as severe floods and droughts or accidental spills of toxins). This dispersal is often limited by hydrologic connections among different habitats. Some “fugitive species” are especially well adapted for dispersal, and may include other nonaquatic modes of movement. These highly mobile species rapidly colonize new habitats or disturbed habitats and are widespread, generalist species in terms of their roles in ecosystem functioning. Other species have more specialized ecosystem roles in particular habitats and are less adapted for dispersal. These species have restricted distributions and different adaptations for persistence, in relatively isolated ecosystems with limited habitat connectivity. If population densities increase beyond carrying capacity in optimal habitats, the movement of species from their high‐quality habitats to low‐quality habitats creates sink populations where individuals survive but do not reproduce and cannot sustain ecosystem services. Source populations are those that continue to reproduce in high‐quality habitats and to produce individuals who disperse to locations with lower or variable habitat quality. The occasional flow of genes among these usually isolated subpopulations (metapopulations) influences the long‐term evolution of species and aggregations of partially isolated communities (metacommunities). These biotic processes and their associated ecological services depend on sustainable flows of water throughout habitats in entire drainage networks. However, high degrees of connectivity also allow introduced, nonnative species to spread and possibly displace native species. Over time, the loss of native species which are well adapted for long‐term variability in environmental conditions can, in some catchments, lead to instability and unreliable provisioning of ecosystem services by nonnative species.

show abstract

The Network Dynamics Hypothesis: How Channel Networks Structure Riverine Habitats

Cited by 805 publications

References 48 publications

Enhanced Diversity at Network Nodes: River Confluences Increase Vegetation-Patch Diversity~!2010-03-22~!2010-04-30~!2010-07-07~!

Enhanced Diversity at Network Nodes: River Confluences Increase Vegetation-Patch Diversity~!2010-03-22~!2010-04-30~!2010-07-07~!

Untitled

Ecosystem Processes

Contact Info

Product

Resources

About