Mixing of floodwaters in a restored habitat wetland in northeastern Ontario

Gilbert, Janice M.; Warner, Barry G.; Aravena, Ramón; Davies, J. Chris; Brook, Douglas A.

doi:10.1007/bf03161739

Cited by 3 publications

(2 citation statements)

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“…Flow can be On-Going Phipps and Crumpton, 1994Hey et al, 1994Miles and Fink. 1998Fennessy et al, 1994McCormick et al, 1996Gilbert et al, 1999Davis, 1981Moustafa et al, 1998Newman et al, 1999Moustafa. 1999 measured continuously, but nutrient concentration is measured during particular periods of time.…”

Section: Introductionmentioning

confidence: 99%

IDENTIFICATION OF AN OPTIMAL SAMPLING STRATEGY FOR A CONSTRUCTED WETLAND¹

Moustafa¹,

Havens²

2001

J American Water Resour Assoc

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The objective of this investigation was to determine the effect of sampling frequency and sampling type on estimates of monthly nutrient loads and flow‐weighted nutrient concentrations in a constructed wetland. Phosphorus and nitrogen loads and concentrations entering and leaving a subtropical wetland (the Everglades Nutrient Removal Project, ENRP) were calculated on the basis of three sampling frequencies. The first frequency included weekly composite samples (three daily samples composited for one week) and grab samples from August 1994 to July 1997, representing a base‐line condition for comparison with results using reduced sampling frequencies. The second and third sampling frequency included three and two composite samples per month, respectively, drawn from the weekly samples. Total phosphorus and nitrogen loads calculated using two and three samples per month were almost identical to results based on four samples per month (least‐squares regression coefficients ranged from 0.96 to 0.98). Results of monthly mean flow‐weighted nutrient concentrations, obtained using reduced sampling frequencies, also were strongly correlated to concentrations calculated using the base‐line sampling frequency (r2ranged from 0.82 to 0.93). Grab samples did not always provide good estimates of loads or concentrations, particularly at the inflow when data were highly variable. From the results of this study, we can recommend that bi‐weekly composite sampling be used to monitor nutrient concentrations and loads discharged from larger‐scale Everglades Stormwater Treatment Areas (STAs) now under construction. Because there are high costs associated with water sample collection and processing, studies to identify optimal sampling frequencies should be a key feature in the design of any comprehensive wetland‐monitoring program.

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Section: Introductionmentioning

confidence: 99%

IDENTIFICATION OF AN OPTIMAL SAMPLING STRATEGY FOR A CONSTRUCTED WETLAND¹

Moustafa¹,

Havens²

2001

J American Water Resour Assoc

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“…Regionally rare birds were observed on the site and included Upland Sandpiper (for scientific names of birds see Table 3), Short-eared Owl, Eastern Meadowlark, and LeConte's Sparrow. Preliminary post-construction vegetation (Gilbert 1997) and bird surveys (Huizer and Henshaw 1997*) were completed in 1997 before the wetland was fully constructed. Results indicated that shallow water wetland and marsh habitat was created and that waterfowl and other wetland birds were attracted to the wetland (Huizer and Henshaw 1997*).…”

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confidence: 99%

Effects of Wetland Creation on Breeding Season Bird Use in Boreal Eastern Ontario

2005

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Wetland construction has been an effective means of mitigating wetland habitat losses due to agricultural and other activities. However, the type, variety, and age of the habitats created are often critical components in the success of the wetland when the aim is to enhance the bird community. Hilliardton Marsh was constructed as a series of cells between 1993 and 1997 in boreal eastern Ontario to provide waterfowl habitat. We determined habitat change and monitored breeding-season bird use before construction and one year after the last cell was constructed. Wetland construction resulted in dramatic changes to the vegetation and bird communities. The area was transformed into a variety of wetland habitats, but primarily marsh, one of the rarest wetland types in boreal Ontario. Survey stations with moderate habitat change exhibited the greatest change in bird species richness. Total species richness increased 55% from 56 to 87 species, with obligate wetland birds increasing from 3 to 26 species. Rare birds increased from 11 to 27 species, with most as obligate or facultative wetland birds, but also Peregrine Falcon (Falco peregrinus). Bird abundance, as measured by the number of stations where a species was observed, increased significantly for obligate wetland birds. There were no significant losses of species from any bird group, as adjacent upland habitat was preserved. This short-term study has shown that construction of new wetland habitat in boreal eastern Ontario, especially marsh, can significantly increase the numbers of breeding-season birds, including rare species. However, longterm monitoring is required to ensure sustained success of wetland construction projects for birds.

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