The role of climate change in the occurrence of algal blooms: Lake Burragorang, Australia

Vilhena, Leticia Chamelete De; Hillmer, Ingrid; Imberger, Jörg

doi:10.4319/lo.2010.55.3.1188

Cited by 48 publications

(24 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When the neutral buoyancy depth in the ambient is reduced, the entrainment into the underflow will reduce because the underflow will not travel as far before lifting away from the lake bed. All mixing processes that contribute substantially to dilution of a specific inflow must be represented accurately in a hydrodynamic model if it is to form a sound basis for pollutant transport or ecological analysis (Botelho and Imberger 2007;Rueda et al 2007;Vilhena et al 2010). Models of plunge region mixing are currently lacking and need to be further improved and validated (Dallimore et al 2004;Rueda and MacIntyre 2010).…”

Section: Discussionmentioning

confidence: 99%

“…The nutrient loading to a lake normally comes from river inflows, so the ecological response of the lake is very sensitive to changes in the inflow behavior (Rueda and MacIntyre 2009;Vilhena et al 2010;Marti et al 2011). Incorrect modeling of the dilution of an inflow can give rise to errors in both the intrusion depth and the availability of nutrients to the primary producers in the surface layer (Rueda et al 2007).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Mixing of an interflow into the ambient water of Lake Iseo

Hogg

Marti

Huppert

et al. 2013

Limnology & Oceanography

View full text Add to dashboard Cite

River water flowing as an interflow was investigated using field data, collected in Lake Iseo (Italy), and theory. A theory for the lateral falling mechanism of plunging was developed for inflows when the initial densimetric Froude number (Fr 0 ) is slightly larger than unity. The ratio of the river width to the offshore extent of the plunge region was equal to Fr 0 . The mixing ratio in the plunge region was 0.06. Theoretical results were quantitatively consistent with the length scale and mixing ratio of the observed plunge region. The progression of the inflow was interpreted as: initially a laterally falling plunge region with little mixing; followed by a steep underflow region with substantial mixing; and finally an intrusion. The intrusion was at first controlled dynamically by an inertiabuoyancy force balance. Further from the liftoff point, turbulent mixing effects dominated over those due to inertia. Ultimately, the intrusion diffused into the adjacent layers in such a way that the interflow fluid was effectively indistinguishable from the lake water.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Mixing of an interflow into the ambient water of Lake Iseo

Hogg

Marti

Huppert

et al. 2013

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Similarly, it is highly uncertain which effects global change will have at the catchment scale, where increasing temperatures, changing land use and frequency of extreme events will lead to changing nutrient fluxes into the surface waters. A study on the influence of altered hydrological regimes brought about by shifting precipitation patterns in eastern Australia, using ELCOM-CAEDYM, has highlighted the potential significance of this on water quality processes (Vilhena et al 2010).…”

Section: Modelling the Impact Of Climate Change With Eutrophication Mmentioning

confidence: 99%

Challenges and opportunities for integrating lake ecosystem modelling approaches

et al. 2010

View full text Add to dashboard Cite

A large number and wide variety of lake ecosystem models have been developed and published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more models largely following the concept of others ('reinventing the wheel'). The other challenge is to avoid focusing on only one type of model, while ignoring new and diverse approaches that have become available ('having tunnel vision'). In this paper, we aim at improving the awareness of existing models and knowledge of concurrent approaches in lake ecosystem modelling, without covering all possible model tools and avenues. First, we present a broad variety of modelling approaches. To illustrate these approaches, we give brief descriptions of rather arbitrarily selected sets of specific models. We deal with static models (steady state and regression models), complex dynamic models (CAEDYM, CE-QUAL-W2, Delft 3D-ECO, LakeMab, LakeWeb, MyLake, PCLake, PROTECH, SALMO), structurally dynamic models and minimal dynamic models. We also discuss a group of approaches that could all be classified as individual based: superindividual models (Piscator, Charisma), physiologically structured models, stage-structured models and traitbased models. We briefly mention genetic algorithms, neural networks, Kalman filters and fuzzy logic. Thereafter, we zoom in, as an in-depth example, on the multi-decadal development and application of the lake ecosystem model PCLake and related models (PCLake Metamodel, Lake Shira Model, IPH-TRIM3D-PCLake). In the discussion, we argue that while the historical development of each approach and model is understandable given its 'leading principle', there are many opportunities for combining approaches. We take the point of view that a single 'right' approach does not exist and should not be strived for. Instead, multiple modelling approaches, applied concurrently to a given problem, can help develop an integrative view on the functioning of lake ecosystems. We end with a set of specific recommendations that may be of help in the further development of lake ecosystem models.

show abstract

“…Because of its negative effects on lake ecosystem services (Cronberg et al 1988, Hongve et al 1988, the Swedish Environmental Protection Agency treats this alga as a noxious species but currently lacks science-based information necessary for effective management. Because algal blooms will be of increasing management concern in a warmer future (Rabalais et al 2009, Vilhena et al 2010, water resource managers require information for local and regional conservation planning to mitigate negative ecological and socioeconomic impacts that can derive from the future range expansion of G. semen and other invasive species.…”

Section: Introductionmentioning

confidence: 99%

Insight on Invasions and Resilience Derived from Spatiotemporal Discontinuities of Biomass at Local and Regional Scales

Angeler¹,

Allen²,

Johnson³

2012

E&S

View full text Add to dashboard Cite

. 2012. Insight on invasions and resilience derived from spatiotemporal discontinuities of biomass at local and regional scales. ABSTRACT. Understanding the social and ecological consequences of species invasions is complicated by nonlinearities in processes, and differences in process and structure as scale is changed. Here we use discontinuity analyses to investigate nonlinear patterns in the distribution of biomass of an invasive nuisance species that could indicate scale-specific organization. We analyze biomass patterns in the flagellate Gonyostomum semen (Raphidophyta) in 75 boreal lakes during an 11-year period (1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007). With simulations using a unimodal null model and cluster analysis, we identified regional groupings of lakes based on their biomass patterns. We evaluated the variability of membership of individual lakes in regional biomass groups. Temporal trends in local and regional discontinuity patterns were analyzed using regressions and correlations with environmental variables that characterize nutrient conditions, acidity status, temperature variability, and water clarity. Regionally, there was a significant increase in the number of biomass groups over time, indicative of an increased number of scales at which algal biomass organizes across lakes. This increased complexity correlated with the invasion history of G. semen and broad-scale environmental change (recovery from acidification). Locally, no consistent patterns of lake membership to regional biomass groups were observed, and correlations with environmental variables were lake specific. The increased complexity of regional biomass patterns suggests that processes that act within or between scales reinforce the presence of G. semen and its potential to develop high-biomass blooms in boreal lakes. Emergent regional patterns combined with locally stochastic dynamics suggest a bleak future for managing G. semen, and more generally why invasive species can be ecologically successful.

show abstract

The role of climate change in the occurrence of algal blooms: Lake Burragorang, Australia

Cited by 48 publications

References 27 publications

Mixing of an interflow into the ambient water of Lake Iseo

Mixing of an interflow into the ambient water of Lake Iseo

Challenges and opportunities for integrating lake ecosystem modelling approaches

Insight on Invasions and Resilience Derived from Spatiotemporal Discontinuities of Biomass at Local and Regional Scales

Contact Info

Product

Resources

About