Diurnal Lepidoptera: Sensitive Indicators of Cultivated and Abandoned Grassland

1985 ◽  
Vol 22 (3) ◽  
pp. 849 ◽  
Author(s):  
A. Erhardt
Keyword(s):  
2019 ◽  
Vol 65 (4) ◽  
pp. 155-163
Author(s):  
Miriam Kizeková ◽  
Radoslava Kanianska ◽  
Ľubica Jančová ◽  
Jozef Čunderlík ◽  
Zuzana Dugátová ◽  
...  

Abstract This paper aimed to monitory the dry matter biomass production and carbon stocks of above-and below-ground biomass in five types of grasslands in Slovakia: i) lowland oversowed pasture ii) lowland hay meadows, iii) mesophilous pasture, iv) mountain hay meadows, v) abandoned grassland. Averaged over two cropping seasons the total above-and below-ground biomass differed significantly across the monitored grasslands. It ranged respectively from 2.18 to 7.86 t/ha and from 9.64 to 22.67 t/ha dry matter depending on the pedoclimatic condition and the botanical composition of each grassland type. Consequently, this resulted also in the carbon stocks in above-and below-ground biomass. Generally, the mean carbon stocks were 1.56 t/ha for above-ground biomass (24%) and 4.83 t/ha for below-ground biomass (76%). The botanical composition for all the grassland types was also described. The highest number of plant species (55) was observed in lowland hay meadow located in Slovak Karst, the lowest one (23) for the oversowed grassland located in Eastern Slovak Upland. This monitoring paper showed that semi-natural grassland habitats and improved grasslands as well are an important carbon sink, and they can play a key role in global climate change mitigation.


2020 ◽  
Vol 26 (8) ◽  
pp. 4366-4378 ◽  
Author(s):  
Johannes Ingrisch ◽  
Stefan Karlowsky ◽  
Roland Hasibeder ◽  
Gerd Gleixner ◽  
Michael Bahn

2011 ◽  
Vol 80 (4) ◽  
pp. 259-268 ◽  
Author(s):  
Zbigniew Dzwonko ◽  
Stefania Loster

We examined to what extend the rate and direction of changes in unmanaged grassland depend on fluctuations in climatic conditions. Vegetation data from permanent plots in a semi-natural grassland in southern Poland collected over 12 years were used. Relations between weather variables, time, and the cover of 41 more frequent species and 14 plant functional groups were analysed. The greatest effect on the dynamics of species and functional groups had precipitation in spring and/or early summer, particularly in the current year. The majority of plant groups were significantly affected also by the temperature in spring and early summer in one of the three previous years. During 12 years, the cover of annuals and biennials, short plants, and plants with small leaves decreased, while the cover of taller plants, plants with larger leaves, and with vegetative spread increased. The analyses suggest that these successional changes were not directly associated with climatic conditions but were affected by them indirectly through interspecific competition. The fluctuations in climatic conditions, chiefly precipitation, had a significant effect on both the composition and the rate of changes in abandoned grassland. The increase in the cover of tall perennial species with broad leaves hindered succession towards woodland despite of the presence of woods in the closed vicinity. It can be expected that during drier periods colonisation of grassland by later successional species could be easier.


Biologia ◽  
2008 ◽  
Vol 63 (4) ◽  
Author(s):  
Michal Hejcman ◽  
Irena Žáková ◽  
Miloslav Bílek ◽  
Pavla Bendová ◽  
Pavla Hejcmanová ◽  
...  

AbstractThe effect of rotational grazing on the sward structure of long-term abandoned grassland and the sheep diet selection were investigated in the Giant Mts (Krkonoše/Karkonosze). The aim of the study was to answer the following questions: (1) Does sheep grazing affect the sward structure of previously abandoned mountain grassland? (2) How does sheep diet selection develop within and among grazing seasons? (3) Which section of a pasture do sheep prefer to graze? Data was collected three times during each grazing season in spring, summer and in autumn in the years 2001, 2002 and 2003 Fifty 1 × 1 m plots were used where the plant species occurrence and damage of plants by grazing for all species were repeatedly recorded. 1) Nonsignificant changes in plant species occurrences were recorded in spite of obvious visual changes in sward structure due to grazing e.g. the retreat of tall dominant species characteristic of long-term unmanaged grasslands. 2) Seasonal as well as inter-annual changes in sheep diet selection were detected. In spring 2001, sheep grazed over a wide variety of plant species in low quantities. In subsequent springs, they preferred species favoured during previous autumns (Veratrum album subsp. lobelianum; Ranunculus platanifolius; Senecio ovatus) and changed the diet only as a result of the elimination of favoured plants. 3) Sheep preferred to graze at the highest elevated part of the pasture probably as a consequence of anti-predator behaviour not due to higher occurrence of favoured plant species or the presence of a drinking place or salt licks. Changes in the sward structure were mostly of a quantitative not qualitative character, thus the presence-absence data collection is not a suitable method for monitoring the effects of management restoration. The diet selection changed probably due to the animals’ experience; sheep had no experience with montane species in spring 2001. The sheep were able to recognize favoured plant species after 6 months of wintering in lowland.


Author(s):  
Håvard Steinshamn ◽  
Lise Grøva ◽  
Steffen A. Adler ◽  
Emma Brunberg ◽  
Unni S. Lande

2009 ◽  
Vol 43 (2-3) ◽  
pp. 191-199 ◽  
Author(s):  
E. Gömöryová ◽  
R. Hrivnák ◽  
M. Janišová ◽  
K. Ujházy ◽  
D. Gömöry

1981 ◽  
Vol 59 (11) ◽  
pp. 2092-2102 ◽  
Author(s):  
Thomas P. Sullivan ◽  
Charles J. Krebs

Populations of Microtus oregoni were livetrapped from 1971 to 1974 in old field and grassland habitats at the University of British Columbia Research Forest, Maple Ridge, B.C. Forest (1974–1978) and shrub (1975–1980) habitats were also sampled intensively. An additional population was livetrapped (1971–1974) in abandoned grassland near Ladner, B.C. Microtus oregoni exhibited a 3–4 year cyclic fluctuation in abundance in the old field and shrub habitats. Maximum density (72 voles/ha) was recorded on the old field grid which was optimum habitat for this species. Winter breeding and a long reproductive period prior to the peak year, and larger body size during the peak than in other phases of the cycle were characteristic features of the old field population. This vole species did not have a multiannual cycle in habitats where the competitor, M. townsendii, was present. Oregon voles were 3–4 g heavier at the Research Forest than at the Ladner study area. Female voles were more prevalent than males in all populations.


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