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Seasonal distribution and diversity of ground arthropods in microhabitats following a shrub plantation age sequence in desertified steppe.

Liu R, Zhu F, Song N, Yang X, Chai Y - PLoS ONE (2013)

Bottom Line: Overall, a facilitative effect was observed, with more arthropods and a greater diversity found under shrubs as compared to open areas, but this was markedly affected by seasonal changes.Shrub plantation age significantly influenced the distribution of the most abundant groups, and also the diversity indices of the ground arthropods.Altogether the recovery of arthropod communities was markedly affected by seasonal variability, and they demonstrated distinctive communal fingerprints in different microhabitats for each plantation age stage.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education, Ningxia University, Yinchuan, China.

ABSTRACT
In desertified regions, shrub-dominated patches are important microhabitats for ground arthropod assemblages. As shrub age increases, soil, vegetation and microbiological properties can change remarkably and spontaneously across seasons. However, relatively few studies have analyzed how ground arthropods respond to the microhabitats created by shrubs of different plantation ages across seasons. Using 6, 15, 24 and 36 year-old plantations of re-vegetated shrubs (Caragana koushinskii) in the desert steppe of northwestern China as a model system, we sampled ground arthropod communities using a pitfall trapping method in the microhabitats under shrubs and in the open areas between shrubs, during the spring, summer and autumn. The total ground arthropod assemblage was dominated by Carabidae, Melolonthidae, Curculionidae, Tenebrionidae and Formicidae that were affected by plantation age, seasonal changes, or the interaction between these factors, with the later two groups also influenced by microhabitat. Overall, a facilitative effect was observed, with more arthropods and a greater diversity found under shrubs as compared to open areas, but this was markedly affected by seasonal changes. There was a high degree of similarity in arthropod assemblages and diversity between microhabitats in summer and autumn. Shrub plantation age significantly influenced the distribution of the most abundant groups, and also the diversity indices of the ground arthropods. However, there was not an overall positive relationship between shrub age and arthropod abundance, richness or diversity index. The influence of plantation age on arthropod communities was also affected by seasonal changes. From spring through summer to autumn, community indices of ground arthropods tended to decline, and a high degree of similarity in these indices (with fluctuation) was observed among different ages of shrub plantation in autumn. Altogether the recovery of arthropod communities was markedly affected by seasonal variability, and they demonstrated distinctive communal fingerprints in different microhabitats for each plantation age stage.

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Means (±SEs) of total abundance, taxonomic richness, and Shannon’s diversity index of ground arthropods between microhabitats for each plantation age in different sampling periods.
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pone-0077962-g002: Means (±SEs) of total abundance, taxonomic richness, and Shannon’s diversity index of ground arthropods between microhabitats for each plantation age in different sampling periods.

Mentions: The total abundance of ground arthropods showed significant differences between the microhabitats under the shrub and in the open areas (Table 1). Total abundance differed also among plantation ages and among sampling periods. There was a significant interaction between microhabitats and sampling periods and between plantation ages and sampling periods for total abundance, indicating that both microhabitat and plantation age variability in total abundance varied among sampling periods. In spring, there was a considerably higher total abundance in the microhabitats under shrubs than in the open areas, and the differences between the two microhabitats tended to increase with plantation ages; from 6 to 24 years of shrub plantation, the total abundance tended to decline, though after this age range they tended to increase (Figure 2). In summer and autumn, on the other hand, there were only slight differences between the microhabitats in the four plantation ages.


Seasonal distribution and diversity of ground arthropods in microhabitats following a shrub plantation age sequence in desertified steppe.

Liu R, Zhu F, Song N, Yang X, Chai Y - PLoS ONE (2013)

Means (±SEs) of total abundance, taxonomic richness, and Shannon’s diversity index of ground arthropods between microhabitats for each plantation age in different sampling periods.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3824025&req=5

pone-0077962-g002: Means (±SEs) of total abundance, taxonomic richness, and Shannon’s diversity index of ground arthropods between microhabitats for each plantation age in different sampling periods.
Mentions: The total abundance of ground arthropods showed significant differences between the microhabitats under the shrub and in the open areas (Table 1). Total abundance differed also among plantation ages and among sampling periods. There was a significant interaction between microhabitats and sampling periods and between plantation ages and sampling periods for total abundance, indicating that both microhabitat and plantation age variability in total abundance varied among sampling periods. In spring, there was a considerably higher total abundance in the microhabitats under shrubs than in the open areas, and the differences between the two microhabitats tended to increase with plantation ages; from 6 to 24 years of shrub plantation, the total abundance tended to decline, though after this age range they tended to increase (Figure 2). In summer and autumn, on the other hand, there were only slight differences between the microhabitats in the four plantation ages.

Bottom Line: Overall, a facilitative effect was observed, with more arthropods and a greater diversity found under shrubs as compared to open areas, but this was markedly affected by seasonal changes.Shrub plantation age significantly influenced the distribution of the most abundant groups, and also the diversity indices of the ground arthropods.Altogether the recovery of arthropod communities was markedly affected by seasonal variability, and they demonstrated distinctive communal fingerprints in different microhabitats for each plantation age stage.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education, Ningxia University, Yinchuan, China.

ABSTRACT
In desertified regions, shrub-dominated patches are important microhabitats for ground arthropod assemblages. As shrub age increases, soil, vegetation and microbiological properties can change remarkably and spontaneously across seasons. However, relatively few studies have analyzed how ground arthropods respond to the microhabitats created by shrubs of different plantation ages across seasons. Using 6, 15, 24 and 36 year-old plantations of re-vegetated shrubs (Caragana koushinskii) in the desert steppe of northwestern China as a model system, we sampled ground arthropod communities using a pitfall trapping method in the microhabitats under shrubs and in the open areas between shrubs, during the spring, summer and autumn. The total ground arthropod assemblage was dominated by Carabidae, Melolonthidae, Curculionidae, Tenebrionidae and Formicidae that were affected by plantation age, seasonal changes, or the interaction between these factors, with the later two groups also influenced by microhabitat. Overall, a facilitative effect was observed, with more arthropods and a greater diversity found under shrubs as compared to open areas, but this was markedly affected by seasonal changes. There was a high degree of similarity in arthropod assemblages and diversity between microhabitats in summer and autumn. Shrub plantation age significantly influenced the distribution of the most abundant groups, and also the diversity indices of the ground arthropods. However, there was not an overall positive relationship between shrub age and arthropod abundance, richness or diversity index. The influence of plantation age on arthropod communities was also affected by seasonal changes. From spring through summer to autumn, community indices of ground arthropods tended to decline, and a high degree of similarity in these indices (with fluctuation) was observed among different ages of shrub plantation in autumn. Altogether the recovery of arthropod communities was markedly affected by seasonal variability, and they demonstrated distinctive communal fingerprints in different microhabitats for each plantation age stage.

Show MeSH
Related in: MedlinePlus