The rapid eutrophication of Lake Winnipeg: Greening under global change

Schindler, D. W.; Hecky, Robert E.; McCullough, Greg

doi:10.1016/j.jglr.2012.04.003

Cited by 210 publications

(146 citation statements)

References 52 publications

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“…There are many examples of where agriculture has had a direct impact on the quality and ecological status of rivers [100,101], lakes [27,102], estuaries [24] and coastal systems [103]. A wide range of on-farm measures are now being recommended to reduce N and P loadings from agriculture to water in order to make potable water safe and to restore or maintain good or high ecological status.…”

Section: Mitigating Nutrient Pressures From Farmingmentioning

confidence: 99%

“…This is because the relationships between nutrient use, nutrient delivery, biological response and ecosystem resilience in space and time are highly complex making it difficult to accurately predict recovery trajectories based on nutrient load reduction [22,23]. For example, any remediation may well take long periods of time due to within catchment storage and fractal functioning, while complex feed-back mechanisms and the confounding effects of climate change make it difficult to predict the direction of biological improvement [24][25][26][27]. The need for a more holistic approach to improving water quality including biophysical restoration (e.g., riparian management, flow regulation and food web enhancement [28,29]) is increasingly being recognized, but there is no general recipe for success.…”

Section: Introductionmentioning

confidence: 99%

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Agriculture and Eutrophication: Where Do We Go from Here?

et al. 2014

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Abstract:The eutrophication of surface waters has become an endemic global problem. Nutrient loadings from agriculture are a major driver, but it remains very unclear what level of on-farm controls are necessary or can be justified to achieve water quality improvements. In this review article, we use the UK as an example of societies' multiple stressors on water quality to explore the uncertainties and challenges in achieving a sustainable balance between useable water resources, diverse aquatic ecosystems and a viable agriculture. Our analysis shows that nutrient loss from agriculture is a challenging issue if farm productivity and profitability is to be maintained and increased. Legacy stores of nitrogen (N) and phosphorus (P) in catchments may be sufficient to sustain algal blooms and murky waters for decades to come and more innovation is needed to drawdown and recover these nutrients. Agriculture's impact on eutrophication risk may also be overestimated in many catchments, and more accurate accounting of sources, their bioavailabilities and lag times is needed to direct proportioned mitigation efforts more effectively. Best practice farms may still be leaky and incompatible with good water quality in high-risk areas requiring some prioritization of society goals. All sectors of society must clearly use N and P more efficiently to develop long-term sustainable solutions to this complex issue and nutrient reduction strategies should take account of the whole catchment-to-coast continuum. However, the right balance of local interventions OPEN ACCESS Sustainability 2014, 6 5854 (including additional biophysical controls) will need to be highly site specific and better informed by research that unravels the linkages between sustainable farming practices, patterns of nutrient delivery, biological response and recovery trajectories in different types of waterbodies.

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Section: Mitigating Nutrient Pressures From Farmingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Agriculture and Eutrophication: Where Do We Go from Here?

et al. 2014

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“…This could inform practices to mitigate lake eutrophication apparent in several prairie 5 watersheds. Runoff from naturally nutrient rich prairie soil landscapes and predominantly agricultural lands has been blamed for carrying sediment and nutrients to Lake Winnipeg, and enriching it enough to cause excessive primary productivity (eutrophication) in the lake (Schindler et al, 2012;McCullough et al, 2012). Investigation of recurrence of contributing area in such systems can inform how often the sources and pathways of nutrient loaded runoff kilometers, an increase of 39%, and 12% more of the Red River watershed now regularly acting as a source for solutes and nutrients downstream.…”

Section: Implications For Nutrient Managementmentioning

confidence: 99%

On the Relationship Between Flood and Contributing Area

Spence

Mengistu

2017

Preprint

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Abstract:While it is well known that the vast majority of the time only a portion of any watershed contributes runoff to the outlet, this extent is rarely documented. The power-law form of the streamflow and contributing area (Q-A c ) relationship has been known for a half century, but it is uncommon for it to be quantified or its controls evaluated. In this study a semidistributed hydrological model (MESH-PDMROF) that can simulate contributing area and

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“…From the 1960s through the 1980s, several studies reported on the abundance and distribution of colonial waterbirds on lakes Winnipeg, Winnipegosis, and Manitoba, south of the 54th parallel (Vermeer 1969(Vermeer , 1970Koonz and Rakowski 1985;Hobson et al 1989). No region-wide monitoring has taken place in central and southern Manitoba in over two decades despite observed declines in the populations of some colonial species further east on the Great Lakes (Morris et al 2010(Morris et al , 2011) and a number of regional threats to waterbirds, including persecution, flooding of colonies due to water level manipulation, and eutrophication of the lakes, which may subsequently impact breeding waterbirds (Hobson et al 1989;Lindenschmidt et al 2012;Schindler et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Abundance, distribution, and species assemblages of colonial waterbirds in the boreal region of west-central Manitoba and east-central Saskatchewan

Wilson

2013

Can Field Nat

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Central and southern Manitoba contain some of the largest breeding populations of several colonial waterbird species in North America. Despite the value of this region for waterbirds, very little monitoring has been conducted on Lake Winnipeg, Lake Winnipegosis, or Lake Manitoba in the past three decades and little is known about the smaller boreal lakes in adjacent areas to the north. In June 2011, boat surveys were conducted on 11 boreal lakes in west-central Manitoba and east-central Saskatchewan to examine current abundance and distribution of colonial waterbirds in that region. Data from this survey were compared with abundance of colonial waterbirds on Lake Winnipegosis and Lake Manitoba from an aerial survey of these lakes in 2012. Waterbird colonies were located on 7 of the 11 lakes in 2011 and included Double-crested Cormorants (Phalacrocorax auritus) (2373 adults, 1134 pairs in 7 colonies), Common Terns (Sterna hirundo) (1367 adults, 772 pairs in 29 colonies), Forster’s Terns (Sterna forsteri) (20 adults, 11 pairs in 1 colony), Herring Gulls (Larus argentatus) (876 adults, 568 pairs in 23 colonies), and Ring-billed Gulls (Larus delawarensis) (3752 adults, 16 colonies). Common Terns and Herring Gulls appeared to be predominantly breeders and pair abundance for both species increased in a sigmoidal fashion; lakes <100 km2 in area had few breeding pairs. Numbers of Double-crested Cormorants and especially, Ring-billed Gulls, may have included a sizeable non-breeding component. Densities (pairs/lake area) of Common Terns and Herring Gulls were about 2 and 4 times higher, respectively, on these lakes than on Lake Winnipegosis and Lake Manitoba, while Double-crested Cormorant and Ring-billed Gull densities were higher on lakes Winnipegosis and Manitoba. Additional studies of productivity in relation to lake characteristics and connectivity among colonies throughout the region would further our understanding of the importance and sustainability of waterbird populations in this region of the boreal forest.

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The rapid eutrophication of Lake Winnipeg: Greening under global change

Cited by 210 publications

References 52 publications

Agriculture and Eutrophication: Where Do We Go from Here?

Agriculture and Eutrophication: Where Do We Go from Here?

On the Relationship Between Flood and Contributing Area

Abundance, distribution, and species assemblages of colonial waterbirds in the boreal region of west-central Manitoba and east-central Saskatchewan

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