Response of Benthic Algal Communities to Natural Physical Disturbance

Peterson, Christopher G.

doi:10.1016/b978-012668450-6/50042-4

Cited by 153 publications

(216 citation statements)

References 86 publications

Supporting

Mentioning

200

Contrasting

Unclassified

Order By: Relevance

“…As a result, it is conceivable that microbial pools were subject to nonequilibrium conditions following the deposition events as heterotrophs are sensitive to carbon quality. Further, higher simulated values of C T relative to measured values during the 2007 growing season suggest that extensive deposition limited accrual of algal biomass for a full growing season, which has been previously hypothesized to occur as a result of limited light, oxygen, and nutrient delivery to existing stocks of algal biomass buried under sediment deposits [Peterson, 1996].…”

Section: Modeling Needs and Limitationsmentioning

confidence: 99%

Isotope‐based Fluvial Organic Carbon (ISOFLOC) Model: Model formulation, sensitivity, and evaluation

Ford

Fox

2015

Water Resources Research

View full text Add to dashboard Cite

Watershed-scale carbon budgets remain poorly understood, in part due to inadequate simulation tools to assess in-stream carbon fate and transport. A new numerical model termed ISOtope-based FLuvial Organic Carbon (ISOFLOC) is formulated to simulate the fluvial organic carbon budget in watersheds where hydrologic, sediment transport, and biogeochemical processes are coupled to control benthic and transported carbon composition and flux. One ISOFLOC innovation is the formulation of new stable carbon isotope model subroutines that include isotope fractionation processes in order to estimate carbon isotope source, fate, and transport. A second innovation is the coupling of transfers between carbon pools, including algal particulate organic carbon, fine particulate and dissolved organic carbon, and particulate and dissolved inorganic carbon, to simulate the carbon cycle in a comprehensive manner beyond that of existing watershed water quality models. ISOFLOC was tested and verified in a low-gradient, agriculturally impacted stream. Results of a global sensitivity analysis suggested the isotope response variable had unique sensitivity to the coupled interaction between fluvial shear resistance of algal biomass and the concentration of dissolved inorganic carbon. Model calibration and validation suggested good agreement at event, seasonal, and annual timescales. Multiobjective uncertainty analysis suggested inclusion of the carbon stable isotope routine reduced uncertainty by 80% for algal particulate organic carbon flux estimates.

show abstract

Section: Modeling Needs and Limitationsmentioning

confidence: 99%

Isotope‐based Fluvial Organic Carbon (ISOFLOC) Model: Model formulation, sensitivity, and evaluation

Ford

Fox

2015

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…Our CCA indicated that current velocity was the most important factor separating groups along axis-2. Flood frequency and water velocity have been reported as significantly affecting species composition and biomass development of periphytic algae in streams (Petersen, 1996;Clausen and Biggs, 1997). However, velocity effects seem to vary with the trophic status of streams, probably due to a negative association between biomass accumulation and detachment (which increases with current velocity) (Petersen and Stevenson, 1990;Biggs and Hickey, 1994).…”

Section: Relationships Of Benthic Diatom Distribution and Environmentmentioning

confidence: 99%

Distribution of benthic diatoms in Korean rivers and streams in relation to environmental variables

Hwang

Kim

Yoon

et al. 2011

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

-The diatoms are an ecologically important group of algae that have been extensively studied by ecologists and taxonomists. However, the large-scale patterns of diatom distribution and the factors underlying this distribution are largely unknown. The aims of this study were to identify the large-scale spatial patterns of benthic diatom assemblages in Korean streams and rivers, and to assess the importance of numerous environmental factors on diatom distribution. We classified 720 study sites based on diatom flora. Benthic diatoms, water chemistry, altitude, and riparian land cover and use were characterized by multivariate analyses, Monte Carlo permutation tests, and indicator species analysis. In total, we identified 531 diatom taxa. Diatom assemblages were mostly dominated by species of the genera Achnanthes, Navicula, Nitzschia, Cocconeis, Fragilaria (Synedra included), Cymbella, Gomphonema, and Melosira. Cluster analysis partitioned all 720 sites into eight groups based on diatom species composition. Canonical correspondence analysis indicated that altitude, land cover and use, current velocity, electrical conductivity, and nutrient levels explained a significant amount of the variation in the composition of assemblages of benthic diatoms. At the national scale, a downstream ecological gradient was apparent, from fast-flowing, mostly oligotrophic highland streams to slow-flowing, mostly eutrophic lowland rivers. Our data suggest that spatial factors explain some of the variation in diatom distribution. The present investigation of the spatial patterns of benthic diatoms, the ecological determinants of diatom occurrence, and the identification of diatom indicator species contributes to development of a program for assessing the biological integrity of lotic ecosystems in Korea.

show abstract

“…Changes in successional patterns in attached algal communities depend on a complex suite of interactions between physical habitat characteristics, allogenic biological constraints, such as grazing, autogenic changes in community condition, and species representation (Peterson 1996).…”

Section: Introductionmentioning

confidence: 99%

Structural and successional variability of periphytic algal community in a Amazonian lake during the dry and rainy season (Rio Branco, Acre)

2011

View full text Add to dashboard Cite

The colonization process and successional patterns of a periphytic algal community were evaluated in a Amazonian Viveiro Lake (Rio Branco, Acre, Brazil). Sampling was performed over a period of 35 days; at four-day intervals for 20 days, and then at five-day intervals. Water sampling for physical, chemical and biological analyses was done during the dry and rainy season. Glass slides were used as artificial substrates for periphyton colonization. The structural community was evaluated through population density, algae class, diversity indices and descriptive species. Species richness, diversity and evenness increased as succession progressed. While density of Bacillariophyceae, Euglenophyceae and Zygnemaphyceae increased with succession, Cyanobacteria remained dominant. Synechocystis aquatilis, Synechocystis diplococcus and Navicula pseudolanceolata were the main descriptive species in both the dry and rainy season. Cymbela tumida, Frustulia rhomboides, Trachelomonas lacustris and Closterium acicularis was correlated with an increase in hydrologic level during the rainy season. Conversely, the density of Chlamydomonas sp., Chroomonas nordstedtii, Trachelomonas volvocinopsis, Trachelomonas volvocina and Synechococcus linearis was correlated with an increase in water transparency during the dry season. In general, the periphytic algal community showed high diversity and species richness independent of season. Season also had little influence on representation of algae class and main descriptive species. However, successional patterns varied by season, and changes in hydrologic levels acted directly on the succession path of periphytic algae. More research on periphyton dynamics is needed to improve our understanding of tropical lake ecosystems, especially in Amazonian. Keywords: Periphyton, colonization, succession, diversityVariação estrutural e sucessional da comunidade de algas perifíticas em lago amazônico durante o período seco e chuvoso resumo A colonização e o modelo sucessional da comunidade de algas perifíticas foram avaliados no amazônico Lago do Viveiro (Rio Branco, Acre, Brasil). Amostragens foram realizadas no período de 35 dias com intervalos de quatro dias nos primeiros 20 dias e cinco dias no final. Foram realizadas amostragens da água para a determinação das variáveis físicas, químicas e biológicas no período seco e chuvoso. Lâminas de vidro foram usadas para a colonização do perifíton. A estrutura da comunidade foi avaliada através da densidade populacional, classes algais, índices de diversidade e espécies descritoras. A riqueza de espécies, diversidade e equitabilidade aumentaram com o avanço da sucessão. A densidade de Bacillariophyceae, Euglenophyceae e Zygnemaphyceae aumentaram com o avanço da sucessão, mas Cyanobacteria permaneceu dominante. Synechocystis aquatilis, Synechocystis diplococcus e Navicula pseudolanceolata foram descritoras da comunidade no período seco e chuvoso. Cymbela tumida, Frustulia rhomboides, Trachelomonas lacustris e Closterium acicularis foram correlacionadas...

show abstract

Response of Benthic Algal Communities to Natural Physical Disturbance

Cited by 153 publications

References 86 publications

Isotope‐based Fluvial Organic Carbon (ISOFLOC) Model: Model formulation, sensitivity, and evaluation

Isotope‐based Fluvial Organic Carbon (ISOFLOC) Model: Model formulation, sensitivity, and evaluation

Distribution of benthic diatoms in Korean rivers and streams in relation to environmental variables

Structural and successional variability of periphytic algal community in a Amazonian lake during the dry and rainy season (Rio Branco, Acre)

Contact Info

Product

Resources

About