Changes of woody plant interaction and spatial distribution between rocky and sandy soil areas in a semi-arid savanna, South Africa

Schleicher, Jana; Wiegand, Kerstin; Ward, David

doi:10.1016/j.jaridenv.2010.10.003

Cited by 39 publications

(26 citation statements)

References 52 publications

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“…Slack dunes might be isolated among themselves, and the transition zones occur here as small, naturally fragmented systems in the whole dune landscape (Bossuyt et al, 2003). The environment contrasts with that on the adjacent active dunes, and fluctuates throughout the year, maintaining available water in the winter, but being prone to drought stress in summer (Stark et al, 2003). Transition zones between active sand dunes and dune slacks in southwestern Horqin Sandy Land are characterized by a vegetation mosaic of psammophyte, limnocryptophyte-meadow and steppe species Yan et al, 2007;Yan, 2007).…”

Section: Introductionmentioning

confidence: 99%

The role of sexual vs. asexual recruitment of <i>Artemisia wudanica</i> in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

et al. 2016

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Abstract. Artemisia wudanica is an endemic, perennial, pioneering psammophyte species in the sand dune ecosystems of western Horqin Sand Land in northern China. However, no studies have addressed how sexual and asexual reproduction modes of A. wudanica perform at the transitional zones between active dune inter-dune lowlands and active dunes. In early spring, quadrats were randomly set up in the study area to monitor surviving seedling and/or ramet density and frequency coming from sexual/asexual reproduction of A. wudanica. Iron sticks were inserted near each quadrat to determine wind erosion intensity (WE). Additionally, soil samples were collected nearby each quadrat to test for soil moisture (SM), organic matter (OM) and pH. Surviving seedlings of A. wudanica showed an inverse response in comparison with ramets to SM, OM and WE. Soil moisture showed the most positive effect, and WE the negative effect, on surviving, sexual reproduction seedlings. Contrarily, WE had the most positive effect, and SM the negative effect, on asexual reproduction ramets. This suggests that increases in SM and decreases in WE should benefit recruitment of A. wudanica seedlings. On the contrary, ramets coming from asexual reproduction showed a different response to environmental factors in transition zone habitats. While SM was not a key constraint for the survival of seedlings, they showed a better, positive response to wind erosion environments. Overall, various study environmental parameters could be improved to foster A. wudanica invasion and settlement in the plant community through different reproductive modes, thereby promoting vegetation restoration and rehabilitation.

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Section: Introductionmentioning

confidence: 99%

The role of sexual vs. asexual recruitment of <i>Artemisia wudanica</i> in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

et al. 2016

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“…We used the case-control design with living plants of four species as pattern 1 (control pattern) and A. aphylla dead standing plants as pattern 2 (cases). Thus, a difference of g 12 (r) and g 11 (r) provides insights into the spatial distribution of A. aphylla dead standing plants around living plants of four species in relation to the spatial distribution of living plants to each other (Getzin et al 2008;Schleicher et al 2011). The second comparison, g 12 (r) -g 11 (r), can be used to evaluate the spatial distribution of dead standing plants.…”

Section: Discussionmentioning

confidence: 99%

“…The second comparison, g 12 (r) -g 11 (r), can be used to evaluate the spatial distribution of dead standing plants. For example, a positive deviation would mean that dead standing plants exhibited an aggregated spatial distribution in comparison to adult plants (Getzin et al 2006(Getzin et al , 2008Schleicher et al 2011). To perform the random labeling analysis, the spatial position of all plants in the plot remained fixed, but the labels of the points (living plants or dead standing plants) were randomly assigned to the overall pattern (Bailey & Gatrell 1995).…”

Section: Discussionmentioning

confidence: 99%

“…However, many factors play important roles in determining the spatial patterns of tree species distribution in a plant community. In general, biotic and abiotic factors may influence the distribution of species and potentially control their abundance and promote coexistence Schleicher et al 2011). Furthermore, many species also exhibited ecological habitat preferences, although species richness and associations are different among sites (Bazzaz 1991;Cheng et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Spatial patterns and associations of dominant woody species in desert–oasis ecotone of South Junggar Basin, NW China

Chu

Wang

Zhang

2014

Journal of Plant Interactions

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Spatial patterns and associations of plant species are important for revealing how species interact with each other and with the environment, and hence have important implications for the understanding of species interaction and underlying ecological processes with apparent patterns in temperate desert vegetation. In this paper, the function g (r) was used to characterize the spatial patterns and associations of four dominant woody species in three 1-ha desert plant plots in the desert-oasis ecotone of South Junggar Basin, NW China. The complete spatial randomness null model showed four species exhibited significant aggregations at small scales (<20 m). Anabasis aphylla and Nitraria roborowskii, Haloxylon ammodendron and Reaumuria songarica were spatially positive associations at small scales with the independent null model, while A. aphylla and H. ammodendron, A. aphylla and R. songarica, R. songarica and N. roborowskii species pairs exhibited negative associations at small or moderate scales (20-60 m) in our study. The random labeling null model showed that dead standing plants of A. aphylla were largely determined by the combined effects of intra-and interspecific competition. In addition, the results also indicated that the two main factors of habitat heterogeneity and sandy desertification play important roles in determining spatial distribution patterns and associations of woody species in the desert-oasis ecotone of South Junggar Basin. Thus, the differences of species features in spatial patterns and associations should be paid more attention when planning afforestation and developing conservation strategies.

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“…Aggregation is a very general phenomenon in plants, it can often be explained simply in terms of regeneration near to seed sources, or perhaps in safe sites associated with older, larger individuals of one's own or another species Schleicher et al, 2011). We suggest that the small scale aggregation in the A. aphylla and H. ammodendron populations were an effect of limited seed dispersal because of winged perianth being separated arfter a short retention, and the safe-site effect probably plays an important role.…”

Section: Spatial Patternmentioning

confidence: 99%

Changes in Spatial Distribution and Interactions of Two Woody Plants During the Sandy Desertification Process in the South Margin of Junggar Basin, Northwest China

Wang¹

2016

Appl Ecol Env Res

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Abstract:We examined the impact of plant−plant interactions and sandy desertification disturbance on population structure and spatial distribution of the two desert plant species Anabasis aphylla and Haloxylon ammodendron in the south margin of Junggar Basin, NW China. To explore species−habitat interactions, we compared the population structures of two woody plants and evaluated the growth of A. aphylla population in the different soil types. Furthermore, we used the Wiegand−Moloney O-ring statistic to study the spatial pattern and association of A. aphylla population and H. ammodendron population. We found some differences in the population structure and spatial distribution of A. aphylla and H. ammodendron with regard to the sandy desertification condition, which is also connected with changes in plant-plant interactions. Although an aggregation of A. aphylla and H. ammodendron population was found in each plot, the cause of spatial aggregation and association is different in the three sandy desertification areas. In the diluvial plot, the spatial association of A. aphylla and H. ammodendron seems to reflect a tense negative woody plant interaction. On the other hand, the random labeling null model showed that plant-plant interactions were largely determined by the combined effects of interspecific competition and harsh environments in the diluvial-sandy and sandy plots, contrary to the competitive effect of the early stage of sandy desertification expansion.

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Changes of woody plant interaction and spatial distribution between rocky and sandy soil areas in a semi-arid savanna, South Africa

Cited by 39 publications

References 52 publications

The role of sexual vs. asexual recruitment of <i>Artemisia wudanica</i> in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

The role of sexual vs. asexual recruitment of <i>Artemisia wudanica</i> in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

Spatial patterns and associations of dominant woody species in desert–oasis ecotone of South Junggar Basin, NW China

Changes in Spatial Distribution and Interactions of Two Woody Plants During the Sandy Desertification Process in the South Margin of Junggar Basin, Northwest China

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Changes of woody plant interaction and spatial distribution between rocky and sandy soil areas in a semi-arid savanna, South Africa

Cited by 39 publications

References 52 publications

The role of sexual vs. asexual recruitment of &lt;i&gt;Artemisia wudanica&lt;/i&gt; in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

The role of sexual vs. asexual recruitment of &lt;i&gt;Artemisia wudanica&lt;/i&gt; in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

Spatial patterns and associations of dominant woody species in desert–oasis ecotone of South Junggar Basin, NW China

Changes in Spatial Distribution and Interactions of Two Woody Plants During the Sandy Desertification Process in the South Margin of Junggar Basin, Northwest China

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The role of sexual vs. asexual recruitment of <i>Artemisia wudanica</i> in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

The role of sexual vs. asexual recruitment of <i>Artemisia wudanica</i> in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China