Mass loss and nitrogen dynamics in decomposing acid forest litter in the Netherlands at increased nitrogen deposition

Tietema, Albert

doi:10.1007/bf00002805

Cited by 36 publications

(24 citation statements)

References 21 publications

(14 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The removal of Nenriched litter, humus and sod ( l ' sod-cutting ') resulted in an increase in above-ground species diversity and fruit-body production of ECM fungi. Since various reports show the importance of litter and humus layers as major sinks for N inputs (McNulty & Aber, 1993 ;Tietema, 1993 ;Manderscheid et al, 1995 ;Buchmann et al, 1996), increasing atmospheric N inputs to the forest floor will affect available nutrient pools and consequently diversity and species composition of ECM fungi.…”

Section: Spp Paxillus Involutus Lactarius Rufus Lactarius Theiogalmentioning

confidence: 99%

Nitrogen deposition and ectomycorrhizas

1998

View full text Add to dashboard Cite

As a result of increasing anthropogenic nitrogen deposition, N availability in many forest ecosystems, which are normally N-limited, has been enhanced. We discuss the impacts of this increased N availability on the ectomycorrhizal (ECM) symbiosis which is generally regarded as an adaptation to nutrient limited conditions. Nitrogen deposition can influence fruit-body formation by ECM fungi, the production and distribution of the extraradical mycelium in the soil and the formation of ectomycorrhizas.Available data from long-term N deposition studies indicate that the most prominent effects might be discernible above-ground (i.e. on the formation of fruit bodies). ' Generalist ' species, forming a symbiosis with a wide range of tree species, seem to be less affected by increased N availability than ' specialist ' species, especially those living in symbiosis with conifers. However, the importance of below-ground investigations to determine the impacts of N deposition on the ECM symbiosis must not be underestimated. Culture experiments show an optimum N concentration for the formation of extraradical mycelium and mycorrhizas. Often, negative effects only become visible at comparatively high N concentrations, but the use of a few easily cultivated species of ECM fungi, which are adapted to higher N concentrations, undermines our ability to generalize.So far, N deposition experiments in the field have only shown minor changes in the below-ground mycorrhizal population, as estimated from the investigation of mycorrhizal root tips. However, effects on the ECM mycelium, which is the main fungal component in terms of nutrient uptake, cannot be excluded and need further consideration.Because the photoassimilate supply from the plant to the fungal partner is crucial for the maintenance of the ECM symbiosis, we discuss the possible physiological implications of increasing N inputs on the allocation of C to the fungus. Together with ultrastructural changes, physiological effects might precede obvious visible changes and might therefore be useful early indicators of negative impacts of increasing N inputs on the ECM symbiosis.

show abstract

Section: Spp Paxillus Involutus Lactarius Rufus Lactarius Theiogalmentioning

confidence: 99%

Nitrogen deposition and ectomycorrhizas

1998

View full text Add to dashboard Cite

show abstract

“…A litterbag experiment was carried out in this forest as described by Tietema (1993). The experiment started in December 1986.…”

Section: Methodsmentioning

confidence: 99%

Metal distribution across different pools in the organic layer of a forest under acid deposition and its consequences for the metal dynamics

Wessel

Tietema

1995

Plant Soil

View full text Add to dashboard Cite

Metal distribution across disfferent pools in the organic layer of a forest under acid deposition and its consequences for the metal dynamics Wessel, W.W.; Tietema, A. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Acid atmospheric deposition can cause losses of metal nutrients from the organic layer of a soil. The size of these losses depend on the sizes of the different pools in which the metals are present, as these pools differ in mobility. The metal pools in an organic soil layer of a Douglas fir forest in the Netherlands subjected to acid deposition were determined by means of extractions and percolations. Na was mainly dissolved and exchangeably adsorbed, K dissolved, exchangeably adsorbed and present in the soil microbial biomass, Ca exchangeably adsorbed and present in organic precipitates, Mg exchangeably adsorbed and present in the soil biomass, and Mn exchangeably adsorbed and present in inorganic precipitates. The main part of the metals was exchangeably adsorbed. The adsorption affinity increased in the order Na < K < Mg < Mn ~ Ca. The vertical distribution of the metals in the organic layer showed that all metals were continuously lost from the organic layer. The differences between the metals in retention and vertical distribution patterns were in agreement with their differences in deposition rate, pool distribution, and exchange affinity. Since the metals were mainly exchangeably adsorbed, and the acidifying cations dominated the atmospheric deposition, acid deposition and cation exchange must be processes that strongly affect the losses of metals from this organic soil layer.

show abstract

“…Nitrogen leaching at 90 cm soil depth is 31 kg-N ha -1 yr -1 , mainly as NO 3 -. Nitrogen transformations occur mainly in the forest floor (Tietema et al 1993).…”

Section: Site Description and Samplingmentioning

confidence: 99%

“…Relevant work with respect to the current study include investigations of N mineralization and nitrification (Tietema et al 1993;Tietema and Wessel 1992), anoxic micro-sites in litter in relation to N 2 O production (Van der Lee et al 1999), C and N transformations during drying and rewetting (Pulleman and Tietema 1999) and forest floor hydrology (Schaap et al 1997).…”

Section: Site Description and Samplingmentioning

confidence: 99%

“…In general, the studies undertaken have a temporal resolution of weeks to years, either by direct choice (for example to elucidate longterm changes in the functioning of forest ecosystems like Koopmans et al 1996), or because changes in N pool sizes are slow and require time to be measured (for example field incubations like in Tietema 1993). Microbial processes, however, are highly dynamical and respond rapidly to changes in conditions in the forest soil, like temperature, moisture and nutrient inputs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen turnover in fresh Douglas fir litter directly after additions of moisture and inorganic nitrogen

2009

View full text Add to dashboard Cite

The effects of wetting and drying and inorganic nitrogen (N) addition on carbon (C) and N turnover in fresh Douglas fir litter (Speuld forest, the Netherlands) were investigated. Litter was incubated for 9 days in the laboratory, receiving different moisture and N addition treatments. Following the additions, a series of reactions were observed of which most notable were a rapid retention of added ammonium and nitrate (NO 3 -) and a sudden increase in CO 2 respiration. For the rewetted-and-moist incubations, respiration levels remained elevated, N was net immobilized and nitrous oxide (N 2 O) production increased throughout the experiment. About 80% of the NO 3 -produced was lost again as N 2 O. In the rewetted-and-dried incubations, respiration decreased during the drying phase; no clear patterns in N mineralization were detected; and N 2 O production remained at constant levels, but still resulted in gaseous loss for half of the NO 3 -net produced. The experiments thus revealed two important NO 3 -sinks in LF1 litter, namely rapid retention of added NO 3 -and gaseous loss as N 2 O. The maximum NO 3 -loss via these sinks was estimated at 2 kg-N ha -1 yr -1 , which is small compared to annual NO 3 -leaching at 90 cm soil depth (31 kg-N ha -1 yr -1 ).

show abstract

Mass loss and nitrogen dynamics in decomposing acid forest litter in the Netherlands at increased nitrogen deposition

Cited by 36 publications

References 21 publications

Nitrogen deposition and ectomycorrhizas

Nitrogen deposition and ectomycorrhizas

Metal distribution across different pools in the organic layer of a forest under acid deposition and its consequences for the metal dynamics

Nitrogen turnover in fresh Douglas fir litter directly after additions of moisture and inorganic nitrogen

Contact Info

Product

Resources

About