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Effect of shrub microhabitats on aboveground and belowground arthropod distribution in a desertified steppe ecosystem

100%

Liu R., Zhu F., Steinberger Y.

Polish Journal of Ecology

2015

tom 63

nr 4

The influence of the shrub canopy on the spatial distribution of above and below ground arthropod communities in desertified ecosystems is largely unknown. Using the shrubs Hedysarum scoparium (H. scoparium) and Artemisia ordosica (A. ordosica) as model systems, the above and belowground arthropod communities were sampled by using pitfall trapping and hand-sorting, in order to examine the linkage between above and belowground arthropods across shrub microhabitats. Different profile layers harboured mostly distinct arthropod taxon and trophic groups that preferred specific microhabitats. Even the common taxa, including the Carabidae and Formicidae families, were found to have different abundance distributions in above and belowground soil layers across shrub microhabitats. Total abundance distribution was found to differ, while taxon-richness and Shannon-index distributions were similar in above and belowground parts across the shrub microhabitats. Markedly higher taxon-richness and Shannon-index values were found beneath the shrub canopy compared to the open spaces, particularly beneath the A. ordosica shrub canopy. The abundance distribution in above and below ground arthropod communities were affected by the shrub microhabitats along vertical and horizontal axes more than the richness and diversity of these communities. The A. ordosica shrub canopy (compared with the H. scoparium shrub) was found to have greater ecological implications on the spatial distribution of the arthropod communities. All these findings were expected to be helpful for the conservation of biodiversity, shrub plantation management, and desertification control.

Foliar stable carbon isotope discrimination and nutrients contents in two desert plant species

100%

Zhao L., Xiao H., Liu X., Li J., Xiao S.

Polish Journal of Ecology

2007

tom 55

nr 1

Variation of foliar stable Carbon Isotope Discrimination (CID Δ‰) and nutrient contents of Artemisia ordosica (Krasch) (semi-shrub species) and Caragana korshinskii (Kom.) (shrub species) were studied at the southeastern margin of the Tengger Desert, China. Foliar CID Δ, total phosphorus content (TP) and potassium content (K) in A. ordosica were markedly higher than in C. korshinskii while foliar total nitrogen content (TN) and water-use efficiency (WUE) (calculated from foliar CID Δ) in C. korshinskii were significantly higher than those in A. ordosica. There were significant and positive relationships between foliar CID Δ, TN and TP contents (P <0.001) in C. korshinskii, while in A. ordosica a strong and significant positive correlation existed between CID Δ and K content (P <0.001). Based on WUE, TN, TP, and K contents, as well as their relationships, we may conclude that in arid environments, the survival of C. korshinskii profits from its higher WUE, while the survival of A. ordosica from its higher TP and K contents in leaves. In addition, the correlations of foliar CID Δ values with TN and TP contents in C. korshinski and with K content in A. ordosica revealed that the water was one of the main factors limiting the absorption capacity for N and P in C. korshinskii, and for K in A. ordosica. While nutrient conditions were not the factors affecting the growth of C. korshinskii and A. ordosica in the study areas.

Ograniczanie wyników

2 Polish Journal of Ecology

1 Li J.

1 Liu R.

1 Liu X.

1 Steinberger Y.

1 Xiao H.

1 Xiao S.

1 Zhao L.

1 Zhu F.

1 2015

1 2007

Wyniki wyszukiwania

Effect of shrub microhabitats on aboveground and belowground arthropod distribution in a desertified steppe ecosystem

Foliar stable carbon isotope discrimination and nutrients contents in two desert plant species