Article thumbnail
Location of Repository

Composition, structure, light attenuation and nutrient content of the understory vegetation in Eucalyptus sieberi regrowth stand 6 years after thinning and fertilisation

By J. Bauhus, I. Aubin, C. Messier and M. Connell

Abstract

In this study, we investigated the effects of commercial thinning and fertiliser application 6 years after treatment on the structure, composition, and nutrient concentrations of understorey vegetation in a Eucalyptus sieberi regrowth forest in East Gippsland. The stand was thinned at age 26 years, reducing the basal area by ca. 50% and lowering the stocking from ca. 1350 to ca. 250 stems ha-1. Whereas the species diversity and richness of the understorey were not significantly affected by the treatments, thinning promoted the abundance of herbaceous species, and fertilisation increased the proportion of ground ferns such as Pteridium esculentum. Fertilisation with 100 kg N ha-1 and 100 kg P ha-1 decreased the foliage N concentration in Tetrarrhena juncea and Gonocarpus teucrioides, and increased the foliage P concentrations in four of the five most frequent species. This suggested that the understorey was more limited by P than by N. The photosynthetically active radiation above the understorey was 41% of that in the open in thinned stands and 32-34% in unthinned stands, showing that 6 years after thinning the canopy density had not yet returned to pre-treatment levels. However, light attenuation within the understorey did not differ among treatments, confirming that the understorey cover had not increased in response to increased light and nutrient availability. The small changes in the understorey may be attributed to the fact that light and nutrients are not the major factors limiting its development, and that most species are well adapted to disturbance

Topics: thinning, fertilisation, understory composition, eucalyt forest, light attenuation
Year: 2001
OAI identifier: oai:www.archipel.uqam.ca:1591

Suggested articles

Citations

  1. (1996). A simple and efficient method to estimate microsite light availability under a forest canopy. doi
  2. (1994). Arboreal marsupials and nocturnal birds in thinned regrowth, unthinned regrowth and old lowland forest, unthinned regrowth and old lowland forest, doi
  3. (1996). Biomass production, nutrient uptake and nutrient cycling in the Jarrah (Eucalyptus marginata) and Karri (Eucalyptus diversicolor) forests of southwestern Australia.
  4. (1994). Canopy light transmittance in a chronosequence of mixed species deciduous forests. doi
  5. (1983). Changes in the composition of understorey vegetation after harvesting eucalypt for sawlogs and pulpwood in East Gippsland. doi
  6. (1997). Comparative responses of Lonicera maackii (Amur Honeysuckle) and Lindera benzoin (Spicebush) to increased light. doi
  7. (1993). Competition for light: detection, measurement and quantification. doi
  8. (1994). Ecological disturbance and the conservative management of eucalypt forests in doi
  9. (1996). Ecology and Silviculture of Eucalypt forests.
  10. (1998). Effects of overstory and understory vegetation on the understory light environment in mixed boreal forest. doi
  11. (1998). Estimation of leaf area index with the LI-COR LAI doi
  12. (1972). Evolution and measurement of species diversity. doi
  13. (1995). Fashioning Australia’s Forests. doi
  14. (1996). Fertilizer impacts on the understorey of a regenerating Mountain Ash (Eucalyptus regnans doi
  15. (1996). Forest canopies and their influence on understorey vegetation in early seral stands on west Vancouver Island.
  16. (2001). Forest Ecology and Management 144 doi
  17. Forest Ecology and Management 144 (2001) 275–286 285 Growth and water relations of Eucalyptus marginata (Jarrah) stands in response to thinning and fertilization.
  18. (1995). Growth response to thinning and its relation to site resources in Eucalyptus regnans. doi
  19. (1988). Growth responses of trees and understorey to applied nitrogen and phosphorus in Karri (Eucalyptus diversicolor) forest. doi
  20. (1997). Growth responses to thinning in eucalypt regrowth forests.
  21. (1993). Hydrological response to thinning a small jarrah (Eucalyptus marginata) forest catchment. doi
  22. (1998). Interactive influences of silvicultural management and soil chemistry upon soil microbial abundance and nitrogen mineralization. doi
  23. (1992). Light environment and floristic composition across an open forest–rainforest boundary in northeastern Queensland. doi
  24. (2000). Light extinction coefficients specific to the understory vegetation of the southern boreal forest, doi
  25. (1990). Light regimes beneath closed canopies and tree-fall gaps in temperate and tropical forests. doi
  26. (1996). Modelling distributions of arboreal and ground-dwelling mammals in relation to climate, nutrients, plant chemical defences and vegetation structure in the eucalypt forests of southeastern Australia. doi
  27. (1983). Native trees and shrubs of south-eastern doi
  28. (1992). Nodule production and nitrogen fixation (acetylene reduction) by an understorey legume (Bossiaea laidlawiana) in eucalypt forest. doi
  29. (1995). Opportunities for more productive management of regrowth eucalypt forests: a case study in the E. sieberi forests of East Gippsland.
  30. (1999). Plant diversity in managed forests: understorey responses to thinning and fertilization. doi
  31. (1995). Plant species diversity in natural and managed forests of the Pacific Northwest. doi
  32. (1999). Predicting and managing light in the understory of boreal forests. doi
  33. (1982). Resource Competition and Community Structure. doi
  34. (1984). Role of Acacia spp. in regenerating Eucalyptus regnans doi
  35. (1995). Spatial and temporal variations in the light environment of developing Scots pine stands: the basis for a quick and efficient method of characterizing light. doi
  36. (1996). Studies on spacing, thinning and fertilization in Silvertop Ash regrowth forests of East Gippsland. A report to the Department of Natural Resources and Environment,
  37. (1997). Systat 7.0, New Statistics. doi
  38. (1976). The development of even-aged stands of Eucalyptus regnans doi
  39. (1995). The effects of above-ground and below-ground competition on understorey species composition in a Pinus ponderosa forest.
  40. (1981). The geometry of leaf distribution in some south-eastern Australian forests. doi
  41. (1997). The influence of functional diversity and composition on ecosystem processes. doi
  42. (1987). The short-term effects of clearfelling and slash-burning on the richness, diversity and relative abundance of higher plant species in two types of eucalypt forest on dolerite in Tasmania. doi
  43. (1991). The Young Eucalypt Report — Some Management Options for Australia’s Regrowth Forests.
  44. (1997). Thinning of mixed species regrowth.
  45. (1990). Twig and foliar nutrient concentrations in relation to nitrogen and phosphorus supply in a eucalypt (Eucalyptus diversicolor F. Muell.) and an understorey legume (Bossiaea laidlawiana Tovey and Morris). Plant Soil 126, doi
  46. (1997). Vascular plant-eucalypt interactions. In:
  47. (1986). Vegetation Mitteleuropas mit den Alpen doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.