Response of mid-water common reed stands to water level variations and winter conditions in Lake Poygan, Wisconsin, USA

Bodensteiner, Leo R.; Gabriel, Anthony O.

doi:10.1016/s0304-3770(03)00013-5

Cited by 25 publications

(17 citation statements)

References 22 publications

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“…Their results are comparable to what was observed for papyrus in less disturbed site, Singida. Likewise, some studies have shown that shoot density is higher in drier than in wet areas [28] [29] which agrees with our results of the disturbed area in Wasare.…”

Section: Discussionsupporting

confidence: 93%

<i>Cyperus papyrus</i> L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya

Rongoei¹,

Outa²

2016

OJE

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Cyperus papyrus (L.) growth rate and mortality is influenced by environmental conditions prevailing in the wetland. To assess growth dynamics of C. papyrus in relation to water depth and anthropogenic (exploitation) pressures, monthly and bi-monthly measurement of culm length and girth were done between June and December 2010 (period 1) and April to June 2011 (period 2). Three study sites were selected based on the water levels and livelihood-driven exploitation pressures. Surrogate measurements of individual culm height and girth were done in three 1 m 2 quadrats in each site to determine the growth rate of papyrus. Water depth was lowest in period 2 (dry) and highest in period 1 (wet) which was related to the livelihood activities being highest in period two and lowest in period one. Culm mortality occurred throughout the study period with 64% due to natural senescing while insect/rodent accounted for 19%. Papyrus growth was higher in Singida (2.5 ± 0.2 cm/day) representing less disturbed site and least in Wasare (1.4 ± 0.1 cm/day) which was highly disturbed. Multiple regression models for culm length showed culm density, mean length and NH 4 negatively influenced growth rate while site as a dummy variable, water depth, SRP and TP had positive effects on papyrus growth rate. Understanding growth rate and causes of mortality in papyrus is important to establish sustainable management strategies of this ecosystem to maintain its integrity.

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Section: Discussionsupporting

confidence: 93%

<i>Cyperus papyrus</i> L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya

Rongoei¹,

Outa²

2016

OJE

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“…The spatial change of nutrients showed that surface runoff was the source of nutrients coming into Baiyangdian wetlands. The dynamics of nutrient changes in reed belts were varied and complicated [30,31]. Water level fluctuations were assumed to be an important factor for the dynamics of reed belts [32].…”

Section: The Purification Mechanisms Of Littoral Zonesmentioning

confidence: 99%

Sedimentary Enzyme Kinetics of Land/Water Ecotones with Reed Domination

Wang

Yin²,

Wang

2010

CLEAN Soil Air Water

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Land/water ecotones, the transitional boundary zone between terrestrial and aquatic ecosystems, can effectively trap and assimilate nutrients from external sources. The changes of nutrient cycling will cause a response in enzyme activity. In this paper, the enzyme kinetics of land/water ecotones in a shallow eutrophic wetland in China, dominated by a reed (Phragmites australis) community, are studied. The results indicate that land/water ecotones exhibit a strong filtration function and nutrient factor is an important feature affecting the distribution of enzymes in the transect of the littoral zone. The obvious spatial differences of enzyme activities and nutrients are present in the transect of the reed beds. The land area is the hot zone, where significant changes in enzyme activity occur. T-test results show that the landward spot, 1 m away from the water-land interface, is quite different from other spots, and the 1 m spot is the hot spot where great biochemical change happens. The principal component analysis of the environmental variables shows that nutrient factors have an important affect on enzyme distribution in the transect of the littoral zone. The nutrient factor explains about 54% of the observed variance. In particular, TOC (total organic carbon) correlates with the other five factors (TN; total nitrogen, TP; total phosphorus, phosphatase, b-glucosidase, and urease) with correlative coefficients of 0.932, 0.595, 0.488, 0.433, and -0.468, respectively. The results indicate that TOC is a very important factor in Baiyangdian wetlands.

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“…However, there are some restrictions since the model omits some processes that play a role in the natural situation. First, it is known that the growth of reed can be influenced by the seasonal water level regime (Bodensteiner and Gabriel 2003;Coops and others 2004). Water level regimes and hence depth variations could be modeled in PCLake, but the relation between water level, slope, and area of the marsh zone is not part of the model.…”

Section: Model Restrictionsmentioning

confidence: 99%

The Contribution of Marsh Zones to Water Quality in Dutch Shallow Lakes: A Modeling Study

Sollie

Janse

Mooij

et al. 2008

Environmental Management

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Many lakes have experienced a transition from a clear into a turbid state without macrophyte growth due to eutrophication. There are several measures by which nitrogen (N) and phosphorus (P) concentrations in the surface water can be reduced. We used the shallow lake model PCLake to evaluate the effects of three measures (reducing external nutrient loading, increasing relative marsh area, and increasing exchange rate between open water and marsh) on water quality improvement. Furthermore, the contribution of different retention processes was calculated. Settling and burial contributed more to nutrient retention than denitrification. The model runs for a typical shallow lake in The Netherlands showed that after increasing relative marsh area to 50%, total phosphorous (TP) concentration in the surface water was lower than the Maximum Admissible Risk (MAR, a Dutch government water quality standard) level, in contrast to total nitrogen (TN) concentration. The MAR levels could also be achieved by reducing N and P load. However, reduction of nutrient concentrations to MAR levels did not result in a clear lake state with submerged vegetation. Only a combination of a more drastic reduction of the present nutrient loading, in combination with a relatively large marsh cover (approximately 50%) would lead to such a clear state. We therefore concluded that littoral marsh areas can make a small but significant contribution to lake recovery.

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Response of mid-water common reed stands to water level variations and winter conditions in Lake Poygan, Wisconsin, USA

Cited by 25 publications

References 22 publications

<i>Cyperus papyrus</i> L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya

<i>Cyperus papyrus</i> L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya

Sedimentary Enzyme Kinetics of Land/Water Ecotones with Reed Domination

The Contribution of Marsh Zones to Water Quality in Dutch Shallow Lakes: A Modeling Study

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Response of mid-water common reed stands to water level variations and winter conditions in Lake Poygan, Wisconsin, USA

Cited by 25 publications

References 22 publications

&lt;i&gt;Cyperus papyrus&lt;/i&gt; L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya

&lt;i&gt;Cyperus papyrus&lt;/i&gt; L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya

Sedimentary Enzyme Kinetics of Land/Water Ecotones with Reed Domination

The Contribution of Marsh Zones to Water Quality in Dutch Shallow Lakes: A Modeling Study

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Product

Resources

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<i>Cyperus papyrus</i> L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya

<i>Cyperus papyrus</i> L. Growth Rate and Mortality in Relation to Water Quantity, Quality and Soil Characteristics in Nyando Floodplain Wetland, Kenya