Effects of drainage on the botanical richness of peat grassland.

Strien, A.J. van; Melman, T.C.P.

doi:10.18174/njas.v35i2.16739

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Far more probably, the lack of effects of these factors on floristic richness is due to the dominance of the nitrogen supply at agriculturally exploited fields. The other fac tors may play a role with regard to the floristic richness at a low nitrogen gift and a low production level only (Grime, 1979;van Strien & Melman, 1987). Indeed, the studies mentioning the effects of way of utilization or ground water table on species diversity concerned such low-productive circumstances.…”

Section: Discussionmentioning

confidence: 99%

“…In order to take the differences in conserva tional value between species into account, Drijver & Melman (see van Strien, in prep.; van Strien & Melman, 1987) proposed a variation on the number of species. They assigned all grassland species to three categories: very common species that are characteristic of very intensive exploitation and Overexploitation (e.g.…”

Section: Number Of Quality-indicating Speciesmentioning

confidence: 99%

“…A more sophisticated system distinguishing between rare spe cies and more common species has been developed by Clausman & van Wijngaar den (see van Strien, in prep. ;van Strien & Melman, 1987). On the basis of an exten sive survey of the vegetation of Zuid-Holland they assessed the local rarity of the species.…”

Section: Number Of Quality-indicating Speciesmentioning

confidence: 99%

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Extensification of dairy farming and floristic richness of peat grassland.

Strien¹,

Melman²,

Heiden³

1988

NJAS

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A comparative study of floristic richness of 125 permanent peat grasslands was made in 1983-84 across Zuid-Holland and Utrecht provinces. Three different parameters of floristic richness were used: the number of species, the number of those species that contribute to the conservational value (quality indicating species) and a 'nature value' index that combines species richness with rarity of species. N supply (0-600 kg N/ha per year) was the most important factor determining number of quality-indicating species. Additional factors were peat mud dressing and soil type. Utilization of grassland (whether frequently cut or continuously grazed), ground water table level, pH, P and K contents of the topsoil and type of animal manure had no effect on floristic richness. At levels below 200 kg N/ha per year, a considerable number of species of conservational value (e.g. Lychnis flos-cuculi and Carex nigra) became abundant. The significance of the results for nature conservation with regard to current agricultural practice is discussed. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Section: Discussionmentioning

confidence: 99%

Section: Number Of Quality-indicating Speciesmentioning

confidence: 99%

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Extensification of dairy farming and floristic richness of peat grassland.

Strien¹,

Melman²,

Heiden³

1988

NJAS

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“…Associations of marsh marigold and blue grassland, in cluding most species of meadow birds, only occur in oligotrophic, moist to wet habitats (CBS, 1987;Beintema, 1991). So both the original nutrient status of the soil and original groundwater levels should be restored (Van Strien & Melman, 1987).…”

Section: Ecological Objectivesmentioning

confidence: 99%

Integration of animal husbandry and nature conservation on grassland farms.

Hermans¹,

Vereijken²

1992

NJAS

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A farming model for peat grassland has been designed as an instrument in physical planning, integrating nature conservation and animal husbandry by combining the conditions for existence of both. It includes a subdivision of the farm in production grassland and nature grassland, such as marsh marigold hayfield and blue grassland. Each type of grassland has a suitable combination of groundwater level, P- and N-controlled animal and plant production, and a regime of mowing and grazing depending on its function for flora, fauna and animal husbandry. Sixteen variants, differing in type of activity (dairy, suckler, sheep and cross-bred husbandry) and type of grassland, all single or in combination, are quantified. The initial results of modelling show that the integrated model offers various perspectives for physical planning aimed at integration of agriculture, nature and outdoor recreation. It concerns areas where production grassland has to be converted completely into nature grassland as part of the National Ecological Network, as well as areas where production grassland is partly to be maintained to serve dairy husbandry. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Effects of dykes on plant species composition in a large lowland river floodplain

Leyer

2004

River Research & Apps

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The effects of floodplain fragmentation by dykes on grassland vegetation were evaluated through field studies along the Middle Elbe River (federal states Saxony-Anhalt and Brandenburg, Germany). Plant species composition was examined in 206 sites between 1996 and 1998 in the entire floodplain, which can be divided into the floodplain types 'recent floodplain', 'older floodplain' (which is separated from the recent one by dykes) and the 'margin of the floodplain' (which is the part of the older floodplain that forms the boundary and is furthest from the river). Dynamics in hydrology were examined weekly between November 1996 and February 1999 with the help of 40 water level wells which were installed near the studied sites. The hydrological parameters 'average water level', 'average groundwater level', 'flooding duration', 'flooding depth higher 50 cm above soil surface' and 'standard deviation of the water level line' were calculated to characterize the considered floodplain types and to relate species composition to hydrology. Furthermore several parameters of current management of the vegetation were recorded to evaluate the importance of land use versus hydrology for floodplain grasslands.Detrended and canonical correspondence analysis (DCA, CCA) were used to identify major environmental gradients governing the vegetation and to determine if there is a relationship between the different locations within the floodplain, variation in species composition, and gradients of measured environmental variables.The results indicate that the vegetation is closely related to a combination of water level fluctuations, which are different among the floodplain types, and soil moisture, while type and intensity of current management are not important in this context.The results of contingency tables underline the significance of dykes for the occurrence and absence of individual species among the floodplain types. The observed patterns can also be explained by the different hydrological properties of the recent and older floodplain as the results of logistic regression reveal. Furthermore, disturbance and dispersal processes and their alteration by dykes have to be taken into account to explain the pattern of species occurrence.Partial ordination detected residual differences in vegetation among the different floodplain types after accounting for the effects of the measured environmental variables. Grain size distribution is discussed as a further factor that might influence species composition.

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Effects of drainage on the botanical richness of peat grassland.

Cited by 5 publications

References 3 publications

Extensification of dairy farming and floristic richness of peat grassland.

Extensification of dairy farming and floristic richness of peat grassland.

Integration of animal husbandry and nature conservation on grassland farms.

Effects of dykes on plant species composition in a large lowland river floodplain

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