Phytomass, Litter and Net Primary Production of Herbaceous Layer

Schulze, I.-M.; Bolte, Andreas; Schmidt, Wolfgang; Eichhorn, Johannes

doi:10.1007/b82392_11

Cited by 16 publications

(25 citation statements)

References 25 publications

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“…Furthermore, it has been suggested that N and P are largely withdrawn from the needles before they are shed (Wilpiszewska, 1990;Pensa et al, 2007). Deciduous trees can also withdraw some N and P content during leaf senescence but the magnitude of this process may significantly differ depending on the nutrient availability in soils and tree species (Schulze et al, 2009). Interestingly we noted that runoff collected from the slopes overgrown by Scots pine was considerably richer in NH 4 + ions.…”

Section: Discussionmentioning

confidence: 99%

Catchment vegetation can trigger lake dystrophy through changes in runoff water quality

Klimaszyk

Rzymski

2013

Ann. Limnol. - Int. J. Lim.

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-Surface runoff can supply lakes with a variety of chemical substances -their type and quantity may significantly vary and depend on the characteristics of the catchment area: geomorphology, phytocoenosis type and degree of human impact. In this study we investigated the physicochemical properties of the surface runoff water collected from the wooded catchment of Lake Piaseczno Duze (LPD, Drawa National Park, Poland) covered by a monoculture of Scots pine (Pinus sylvestris) and mixed forest with white birch (Betula pubescens) as the dominant tree. Experimentally, we also aimed to study the leaching of nutrients from pine and birch litter. Throughout the investigated period runoff waters had low pH, brown colour and high levels of dissolved organic carbon (DOC) -most likely induced by humic acids. Furthermore, considerable levels of nitrogen (N) and phosphorus (P) were found. The highest concentrations of nutrients were observed in runoff collected after heavy rainfall and snow melting. Runoff from the coniferous area contained significantly higher levels of DOC but lower concentrations of N and P compared to runoff collected from the birch-dominated forest. Similar physicochemical conditions were observed in the leaching experiment. Moreover, it was found that the release of chemical substances from both coniferous and deciduous litter was rapid. Our study indicates that surface runoff from forest areas can significantly affect lake chemistry. Based on the simultaneous analyses of littoral water chemistry we suggest that it may contribute to LPD dystrophication through the transportation of high levels of acidic compounds.

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Section: Discussionmentioning

confidence: 99%

Catchment vegetation can trigger lake dystrophy through changes in runoff water quality

Klimaszyk

Rzymski

2013

Ann. Limnol. - Int. J. Lim.

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“…not included; n.s. not signi cant; * P < 0.05; * * P < 0.01; * * * P < 0.001 like herbs usually produce N-rich litter (Schulze et al 2009). While the decomposition of wild garlic increased N leaching losses from temperate forests (Jandl et al 1997), beech litter instead reduced NO -3 -N leaching compared to control and nettle (Urtica dioica L.) litter treatments (Scheu 1997).…”

Section: Functional Relationship Between Plants and Dissolved N Uxesmentioning

confidence: 99%

“…Despite its low biomass compared to the tree layer, the understory of temperate forests has a great nitrogen retention capacity (Schulze et al 2009) and is highly e cient in taking up throughfall-derived N (Gebauer et al 2000). Furthermore, the understory in northern hardwood forests can act as a sink for N and reduces N leaching at the end of the dormant season when nitri cation rates are high and tree demand is still low (Muller and Bormann 1976).…”

Section: Functional Relationship Between Plants and Dissolved N Uxesmentioning

confidence: 99%

“…The associated ux of organic C substrates is an important energy source for soil heterotrophs and therefore enhances soil organic matter formation and turnover (Knops et al 2002;Kaiser et al 2011). Although trees constitute the majority of the forest biomass, understory biomass has a strong in uence on N uxes which was ascribed to physiological and phenological di erences between overstory and understory plants (Muller and Bormann 1976;Olsson and Falkengren-Grerup 2003;Schulze et al 2009). While this implies a relationship with functional diversity, no study yet tested the in uence of plant diversity in the canopy and the understory on N uxes in organic layers.…”

Section: Introductionmentioning

confidence: 99%

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Drivers of nitrogen leaching from organic layers in Central European beech forests

et al. 2016

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“…PhytoCalc has been successfully validated on independent measurements in several German forest ecosystems (Mölder et al 2008;Schulze et al 2009). Mölder et al (2008) found that predicted values differed by less than 10% from harvested dry weights in Hainich National Park (Thuringia), an area with broad deciduous forests rich in tree species.…”

Section: Introductionmentioning

confidence: 99%

The estimation of aboveground biomass and nutrient pools of understorey plants in closed Norway spruce forests and on clearcuts

2010

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The estimation model PhytoCalc allows a nondestructive quantification of dry weight and nutrient pools of understorey plants in forests by using the relationship between species biomass, cover and mean shoot length. The model has been validated with independent samples in several German forest types and can be a useful tool in forest monitoring. However, in open areas within forests (e.g. clearcuts), the current model version underestimates biomass and produces unreliable nutrient pool estimations. Thus, tissue density, as approximated by leaf dry matter content (LDMC), is systematically higher under high light compared to low light conditions. We demonstrate that the ratio of LDMC under clearcut conditions to LDMC under forest conditions can be used to adjust the PhytoCalc model to clearcut conditions. We investigated the LDMC ratio of five exemplary species commonly occurring on clearcuts. Integrating the square of the ratio as a correction factor improved estimates of biomass to more than 70% fit between observations and predictions. Results also suggest this ratio can be used to correct nutrient concentrations modelled in PhytoCalc, which tend to be overestimated in clearcuts. As morphological groups of plant species exhibit significantly different ratios, we advise using group-specific correction factors for clearcut adjustments in the future.

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Phytomass, Litter and Net Primary Production of Herbaceous Layer

Cited by 16 publications

References 25 publications

Catchment vegetation can trigger lake dystrophy through changes in runoff water quality

Catchment vegetation can trigger lake dystrophy through changes in runoff water quality

Drivers of nitrogen leaching from organic layers in Central European beech forests

The estimation of aboveground biomass and nutrient pools of understorey plants in closed Norway spruce forests and on clearcuts

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