Vegetation patterns, regeneration rates and divergence in an old-field succession of the high tropical Andes

Sarmiento, Lina; Llambí, Luis Daniel; Escalona, A.; Márquez, Nelson

doi:10.1023/a:1023262724696

Cited by 149 publications

(22 citation statements)

References 48 publications

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“…The temporal gradient is highly correlated to the first DCA axis (Table 3), as is expected in old-field succession studies and has been documented by Sarmiento et al (2003) and Arbelo et al (2006). The successional sequence along the temporal gradient (CCA axis-I) shows a pattern where herbs and grasses are common in the early phase, whereas shrubs, trees and perennial herbs dominate in the later phases (Appendix Table A1).…”

Section: Landscape and Vegetation Patternsupporting

confidence: 82%

“…species richness) were identified following the nomenclature of Hara et al (1978), Hara and Williams (1979), Hara et al (1982), Press et al (2000). The growth form of each plant recorded was categorised into five types; forbs, graminoid, fern, shrub and tree (Appendix Table A1) using the method of Sarmiento et al (2003).…”

Section: Field Methodsmentioning

confidence: 99%

“…Many studies have found that successional development into forest may result in convergence since the dominant canopy reduces the micro scale variability on the ground (Bard 1952;Bazzaz 1996;Horn 1974;Odum 1969;Pickett 1989;Pickett and McDonnell 1989;Quarterman 1957;Vetaas 1997). In a recent study in the high Andes, Sarmiento et al (2003) found that abandoned agricultural fields above the forest line had a divergent development.…”

Section: Introductionmentioning

confidence: 99%

“…Patterns of species richness have been justified both by longterm studies on fixed abandoned agricultural fields, for e.g. Tilman (1986); Pickett (1989); Tunnell et al (2004) and by chronological studies based on research after certain years of abandonment, such as Bazzaz (1996); Bonet and Pausas (2004); Sarmiento et al (2003); Ruprecht (2005), Arbelo et al (2006) and Otto et al (2006). A low number of species in the initial phase is an inevitable phenomenon in primary succession but also in old-field succession.…”

Section: Introductionmentioning

confidence: 99%

“…Here we attempt to test three hypotheses on species diversity. The study of old-field succession has mostly been developed in temperate lowland vegetation (Bazzaz 1996; and references therein); considerably less information is available for high altitude old-fields (Sarmiento et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Temporal changes in species diversity and composition in abandoned fields in a trans-Himalayan landscape, Nepal

2008

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Secondary succession is an increasing phenomenon due to global changes in agriculture policies and practices. The empirical findings are biased towards the temperate zone. Abandonment of agriculture fields is less frequent in the subtropical and tropical zones where agriculture areas are, in general, expanding. But there are exceptions; a rapid rate of abandonment of agricultural fields have taken place in the arid trans-Himalayan region, due to today's globalization of economy. We analysed agriculture fields that were abandoned between 1950 and 2003 in a large u-valley in central Nepal (3400 m a.s.l.). The potential forest vegetation is dominated by Pinus wallichina and shrubs of junipers and cotoneaster species. We tested the intermediate richness hypothesis in relation to vegetation cover, soil development and whether old-field succession is convergent or divergent with species data from 242 1 m 2 plots in 5 age-classes. The main species compositional turnover expressed by Detrended Correspondence Analyses (DCA) correlated, as expected, with time after abandonment. Fields that were abandoned a long time ago are closer to forest at the periphery of the agricultural landscape. Moisture of the soil significantly increased with age of abandonment, but total vegetation cover and pH were negatively related to age. Beta diversity expressed in DCA SD-units showed an increasing trend with age of abandonment, supporting the divergence pattern in old-field succession. The reason why the succession is not converging may be due to browsing by domestic animals that prevent a closed canopy of pines and juniper to develop. There was a significant hump-shaped pattern in species richness along the temporal gradient, which agrees with the intermediate species-richness hypothesis. There was a rapid increase in species richness in plots close to the villages that were used for haymaking which increased the seed input significantly.

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Section: Landscape and Vegetation Patternsupporting

confidence: 82%

Section: Field Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Temporal changes in species diversity and composition in abandoned fields in a trans-Himalayan landscape, Nepal

2008

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Successional Trajectory Over 10 Years of Vegetation Restoration of Abandoned Slope Croplands in the Hill‐Gully Region of the Loess Plateau

et al. 2015

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Revegetation has been the primary management approach for solving the problems caused by severe soil erosion in the Loess Plateau. The objectives of this work were to explore the successional trajectory of the different types of restoration and discuss their potential effectiveness for the control of soil erosion. The presence and coverage of plants in 40 permanent plots were investigated during two periods (2003-2006 and 2013). The naturally and artificially revegetated communities studied in the two surveys were classified using two-way indicator species analysis, and their relationships were analyzed using detrended correspondence analysis. Under natural revegetation, the communities succeed in the following order: annual plants → perennial plants → short rhizome tufts and subshrubs. Under artificial revegetation, succession was interrupted by artificial planting, and a Gramineae herb layer persisted through the years with few changes in species composition. Additionally, species richness, diversity, and evenness increased, while ecological dominance decreased during succession in both revegetation types. Succession rate was rapid at the initial stage and then slowed down gradually. Succession followed different trajectories under natural and artificial revegetation, and based on the potential effects of the two approaches on soil erosion and soil desiccation, we suggest that natural revegetation is preferable over artificial revegetation. Figure 7. Changes in relative species cover between the first and second surveys in different natural revegetation communities. This figure is available in colour online at wileyonlinelibrary.com/journal/ldr 926 M. KOU ET AL.

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A culture of conservation: How an ancient forest plantation turned into an old‐growth forest reserve – The story of the Wamulin forest

et al. 2021

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Vegetation patterns, regeneration rates and divergence in an old-field succession of the high tropical Andes

Cited by 149 publications

References 48 publications

Temporal changes in species diversity and composition in abandoned fields in a trans-Himalayan landscape, Nepal

Temporal changes in species diversity and composition in abandoned fields in a trans-Himalayan landscape, Nepal

Successional Trajectory Over 10 Years of Vegetation Restoration of Abandoned Slope Croplands in the Hill‐Gully Region of the Loess Plateau

A culture of conservation: How an ancient forest plantation turned into an old‐growth forest reserve – The story of the Wamulin forest

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