ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Electronic Resource

Submerged macrophytes, zooplankton and the predominance of low- over high-chlorophyll states in western boreal, shallow-water wetlands (2005)

NORLIN, J. IVOR ; BAYLEY, SUZANNE E. ; ROSS, LISETTE C. M.

Oxford, UK : Blackwell Publishing Ltd

Freshwater biology 50 (2005), S. 0

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ISSN: 1365-2427

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology

Notes: 1. Shallow-water (〈2 m deep) wetlands in northern Alberta's western boreal forest tend to have either extremely high-chlorophyll, pea-green water or water that is low in chlorophyll and clear. The relative importance of top-down processes (e.g. zooplankton grazing) compared with bottom-up processes (e.g. nutrient limitation) for regulating the existence of these alternate states has yet to be explicitly investigated in these poorly studied waterbodies.2. To assess the relationship between chemical and biological factors and the predominance of low-chlorophyll over high-chlorophyll states, a survey of 24 shallow-water wetlands in northern Alberta was conducted over the summers of 2001 and 2002.3. In wetlands without fish, statistical analysis indicated that high- and low-chlorophyll sites could be differentiated with 82% accuracy based solely on whether submerged aquatic vegetation (SAV) coverage was greater or less than 25%. Further, high-SAV lakes with zooplankton communities dominated by large cladocerans were clear 96% of the time.4. In the few wetlands that supported stickleback populations, large cladocerans were absent. However, the development of zooplankton communities dominated by small cladocera (Bosmina) with calanoid copepods in fish-containing wetlands corresponded with a shift from high- to low-chlorophyll states.5. Results suggest that in fishless wetlands high-SAV coverage and grazing by large, SAV-associated cladocerans promotes low-chlorophyll states. Results also suggest that suppression of macroinvertebrate predators by sticklebacks allowing Bosmina to flourish may also promote low-chlorophyll, clear-water conditions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2427.2005.01366.x

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2

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Restoration of a Canadian Prairie Wetland with Agricultural and Municipal Wastewater (1999)

White, Jay S. ; Bayley, Suzanne E.

Springer

Environmental management 24 (1999), S. 25-37

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ISSN: 1432-1009

Keywords: KEY WORDS: Frank Lake; Wetland restoration; Adaptive management; Prairie; Wastewater

Source: Springer Online Journal Archives 1860-2000

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: 3 /day (800,000 US gallons) of municipal wastewater and beef processing wastewater. A large nongovernmental organization hastened restoration with a development process that outlined restoration goals and management objectives to satisfy a dual mandate of wastewater treatment and wildlife habitat creation. In 1995, after five years of wastewater additions, the basins had been refilled and the surrounding uplands had been acquired and restored. The Frank Lake Conservation Area currently provides high-quality habitat for a variety of wildlife in a region where many of the native plants and animals species have been lost due to habitat loss and fragmentation. The success of upland and water management strategies is reflected in the increase of target species' abundance and richness: 50 shorebird species, 44 waterfowl species, 15 raptor species, and 28 other new bird species have returned to the marsh since restoration. As well, significant N and P reduction occurs as waters flow through the first basin of the marsh. The management strategies of this project that satisfied a dual mandate serve as a model to guide managers of other large-scale wetland restoration projects.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s002679900212

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3

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Climate-induced changes in the dissolved organic carbon budgets of boreal lakes (1997)

Schindler, David W. ; Curtis, P. Jefferson ; Bayley, Suzanne E. ; [et al.]

Springer

Biogeochemistry 36 (1997), S. 9-28

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ISSN: 1573-515X

Keywords: dissolved organic carbon ; climatic change ; mass balance budgets ; lake acidification

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology , Geosciences

Notes: Abstract During 20 years of climatic warming, drought and increased forest firesbetween 1970 and 1990, DOC concentrations declined by 15--25%in lakesof the Experimental Lakes Area, northwestern Ontario, allowing increasedpenetration of both UV and photosynthetically-active radiation (PAR), andcausing deeper euphotic zones and thermoclines. Decreased input to thelakes of DOC from terrestrial catchments and upstream lakes was theprimary reason for the decline, although in-lake removal also increasedslightly. Decreased streamflow caused by drought was more important thanforest fires in affecting DOC exports from catchments. Experimentalacidification of lakes caused even greater losses in DOC, by enhancing ratesof in-lake removal. DOC in Lake 302S, acidified to pH 4.5 during the1980’s, declined to less than 10% of preacidificationvalues.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1005792014547

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4

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Effects of hydrologic changes on aboveground production and surface water chemistry in two boreal peatlands in Alberta: Implications for global warming (1997)

Thormann, Markus N. ; Bayley, Suzanne E. ; Szumigalski, Anthony R.

Springer

Hydrobiologia 362 (1997), S. 171-183

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ISSN: 1573-5117

Keywords: bog ; fen ; water levels ; aboveground plant production ; surface water chemistry ; global warming

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Aboveground net primary production (NPP) and surface water chemistryvariables were monitored in a lacustrine sedge fen and a bog for four years.There were no significant differences in precipitation, mean growing seasonannual temperature, and number of growing degree days from 1991 to 1994. Themean annual water levels in the lacustrine sedge fen differed significantly,whereas they were similar in the bog during these four years. We measured 15surface water variables in the lacustrine sedge fen and the bog, and foundthat only two correlated significantly with water level fluctuations. In thelacustrine sedge fen, calcium correlated positively (r2= 0.56) and nitrate correlated negatively (r2 =0.20) with water levels. In the bog, potassium correlated positively(r2 = 0.88) and total dissolved phosphorus correlatednegatively (r2 = 0.62) with water levels. The remainingchemical variables showed no significant correlations with water levelfluctuations. Net primary production of the different vegetation strataappeared to respond to different environmental variables. In the lacustrinesedge fen, graminoid production was explained to a significant degree bywater levels (r2 = 0.53), whereas shrub production wasexplained to a significant degree by surface water chemistry variables, suchas nitrate (r2 = 0.74) and total phosphorus(r2 = 0.22). In the bog, temperature was the onlyvariable that explained moss production to a significant degree(r2 = 0.71), whereas ammonium explained graminoidproduction (r2 = 0.66) and soluble reactive phosphorusexplained shrub production to significant degrees (r2 =0.71). There are few direct data on the impact of climatic warming in borealwetlands, although paleoecological and 2×CO2 model datahave provided some indications of past and possibly future changes invegetation composition, respectively. Our results suggest that thelacustrine sedge fen may succeed to a bog dominated by Sphagnum spp. andPicea mariana, whereas the bog may succeed to an upland-type forestecosystem.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1003194803695

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5

Electronic Resource

Aboveground plant production and nutrient content of the vegetation in six peatlands in Alberta, Canada (1997)

Thormann, Markus N. ; Bayley, Suzanne E.

Springer

Plant ecology 131 (1997), S. 1-16

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ISSN: 1573-5052

Keywords: Bog ; Fen ; Marsh ; Tissue nutrient concentrations

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract We examined the effects of water level, surface water chemistry, and climatic parameters on aboveground primary plant production, and the tissue nutrient concentrations in the dominant herb species in a bog, three fens, and two marshes. In the fens, total NPP correlated best with NO 3 - and total phosphorus surface water concentrations in 1993 and 1994. Total NPP in the marshes correlated best with alkalinity in 1993, and with soluble reactive phosphorus in 1994. Climatic parameters, such as mean annual growing season temperature, growing degree days, and precipitation, had the most notable effect on moss growth, whereas shrub and herb production correlated significantly with the water level relative to the moss surface. Herb production correlated positively and shrub production correlated negatively with the water level relative to the moss surface. Tissue nutrient concentrations of carbon (C), nitrogen (N), and total phosphorus (TP), and the C:N quotient in Carex lasiocarpa exhibited similar trends in the fens and the marshes. Carbon tissue concentrations in C. lasiocarpa remained unchanged, whereas N and TP tissue levels decreased throughout the growing season. In the site with the highest NPP and presumably the highest stand density, C. lasiocarpa exhibited the highest tissue N and TP levels. Furthermore, TP tissue concentrations in C. lasiocarpa were substantially higher in the marshes than in the fens. Tissue nutrient concentrations in Eriophorum vaginatum in the bog showed variable response patterns. N tissue levels increased, whereas tissue TP concentrations decreased from late June to late August. In the bog, E. vaginatum exhibited similar tissue TP levels to C. lasiocarpa in the fens; however, they were both substantially lower than those found in C. lasiocarpa from the marshes.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1009736005824

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6

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Effects of logging in the southern boreal peatlands of Manitoba, Canada (2007)

Locky, David A. ; Bayley, Suzanne E.

Canadian Science Publishing

In: Canadian Journal of Forest Research. 2007; 37(3): 649-661. Published 2007 Mar 01. doi: 10.1139/x06-249.

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Publication Date: 2007-03-01

Description: To evaluate changes in surface water chemistry, peat, and the plant community in logged peatlands, we compared plots in 1–4 year old (class I) and 9–12 year old (class II) clearcuts with plots in wooded controls. Indicator species were significantly different between wooded and clear-cut plots but not between clear-cut plot age classes. Surface waters in class I clearcuts had significantly higher temperature and nutrients compared with controls, and this was attributed to warming of the soil, which resulted in faster decomposition and greater nutrient availability. Hummocks, important peatland plant microhabitats, were reduced in height in all clearcuts because of compaction and abrasion. These abiotic changes caused a shift in the plant community. Total plant diversity was approximately 30% higher on clearcuts and consisted primarily of herbs, particularly grasses. However, bryophyte and lichen diversity and cover was greatest in wooded controls. Picea mariana (Mill.) BSP regeneration was not compromised by clear-cutting and was greater in class II clearcuts. Greater diversity and cover of Salix species in class II clearcuts suggests stable shrub community formation, which may be persistent and may slow succession. The use of appropriate equipment to minimize site disturbances while the ground is frozen may reduce long-term shifts in the plant community.

Print ISSN: 0045-5067

Electronic ISSN: 1208-6037

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition